WO2018018879A1 - 像素电路、显示面板及驱动方法 - Google Patents
像素电路、显示面板及驱动方法 Download PDFInfo
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- WO2018018879A1 WO2018018879A1 PCT/CN2017/073897 CN2017073897W WO2018018879A1 WO 2018018879 A1 WO2018018879 A1 WO 2018018879A1 CN 2017073897 W CN2017073897 W CN 2017073897W WO 2018018879 A1 WO2018018879 A1 WO 2018018879A1
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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Definitions
- Embodiments of the present disclosure relate to a pixel circuit, a display panel, and a driving method.
- organic light-emitting diode (OLED) display panels have self-illumination, high contrast, thin thickness, wide viewing angle, fast response speed, can be used for flexible panels, wide temperature range, simple manufacturing, etc., and have broad development. prospect.
- the organic light emitting diode (OLED) display panel can be applied to a device having a display function such as a mobile phone, a display, a notebook computer, a digital camera, an instrument meter, and the like.
- An embodiment of the present disclosure provides a pixel circuit including: a first lighting circuit for emitting light during operation; a first driving circuit for driving the first lighting circuit; and a first compensation circuit for compensating a first driving circuit; a first data writing circuit for writing data to the first driving circuit; a first reset circuit for resetting the first driving circuit; and a first storage circuit for storing a driving voltage of the first driving circuit; a first initialization circuit for initializing the first lighting circuit; a first lighting control circuit for controlling operation and shutdown of the first lighting circuit; and a second lighting circuit For driving light during operation; a second driving circuit for driving the second lighting circuit; a second compensation circuit for compensating the second driving circuit; and a second data writing circuit for a second driving circuit for writing data; a second reset circuit for resetting the second driving circuit; a second storage circuit for storing a driving voltage of the second driving circuit; and a second initializing circuit for Initializing the second lighting circuit; a second lighting control circuit for controlling operation and shutdown of the second lighting circuit; a third lighting
- the first data writing circuit includes a first transistor
- the first lighting control circuit includes a second transistor and a fifth transistor
- the first compensation circuit includes a first a third transistor
- the first driving circuit includes a fourth transistor
- the first reset circuit includes a sixth transistor
- the first initialization circuit includes a seventh transistor
- the first storage circuit includes a first storage capacitor
- the first light emitting circuit includes a first organic light emitting diode
- the third light emitting control circuit includes an eighth transistor and an eleventh transistor
- the third driving circuit includes a ninth transistor and a tenth transistor
- the third initializing circuit includes a twelfth transistor
- the second reset circuit includes a thirteenth transistor
- the second light emission control circuit includes a fourteenth transistor and an eighteenth transistor
- the second data write circuit includes a fifteenth transistor
- the second compensation circuit includes a sixteenth transistor
- the second driving circuit includes a seventeenth transistor
- the second initialization circuit Including a nineteenth transistor
- the second storage circuit comprises a second storage
- a source of the first transistor is electrically connected to the first data signal end, a gate of the first transistor, a gate of the third transistor, and The second control terminal is electrically connected, and a drain of the first transistor, a drain of the second transistor, a source of the third transistor, and a source of the fourth transistor are electrically connected; a gate of the second transistor, a gate of the fifth transistor, and the fourth control terminal are electrically connected, a source of the second transistor, a first end of the first storage capacitor, and the first power terminal Electrical connection; the third crystal a drain of the tube is electrically connected to the first node; a gate of the fourth transistor is electrically connected to the first node, and a drain of the fourth transistor is electrically connected to a source of the fifth transistor; a drain of the fifth transistor, a drain of the seventh transistor, and a first end of the first organic light emitting diode; a source of the sixth transistor, a source of the seventh transistor
- the fifteenth transistor, the sixteenth transistor, the seventeenth transistor, the eighteenth transistor, and the nineteenth transistor are all thin film transistors.
- the fifteenth transistor, the sixteenth transistor, the seventeenth transistor, the eighteenth transistor, and the nineteenth transistor are all P-type transistors.
- the threshold voltage of the fourth transistor is equal to the threshold voltage of the ninth transistor
- the threshold voltage of the tenth transistor is equal to the threshold voltage of the seventeenth transistor.
- the first organic light emitting diode emits light of a first color when in operation
- the second organic light emitting diode emits light of a second color when in operation
- the first The three organic light emitting diode emits light of a third color when in operation
- the mixed color of the light of the first color and the light of the second color is light of the third color.
- the light of the first color is red light
- the light of the second color is green light
- the light of the third color is yellow light.
- An embodiment of the present disclosure further provides a pixel circuit, including: a fourth lighting circuit for emitting light during operation; a fourth driving circuit for driving the fourth lighting circuit; and a third compensation circuit for compensating a fourth driving circuit; a third data writing circuit for writing data to the fourth driving circuit; a third reset circuit for resetting the fourth driving circuit; and a third storage circuit for storing a driving voltage of the fourth driving circuit; a fourth initializing circuit for initializing the fourth lighting circuit; and a fourth lighting control circuit for controlling operation and shutdown of the fourth lighting circuit; And a second power supply terminal for providing a second lighting voltage to the fourth lighting circuit, and a third power terminal for the third resetting
- the circuit provides a reset voltage; the third data signal end is configured to provide the third data write circuit Providing a third data signal or a standby signal; a first control terminal for providing a first control signal for controlling operation and shutdown of the third reset circuit; and a second control terminal for providing control of the third data write a second control signal for operating and turning off the circuit
- the third data writing circuit includes a twentieth transistor
- the fourth lighting control circuit includes a twenty-first transistor and a twenty-fourth transistor
- the The three compensation circuit includes a twenty-second transistor
- the fourth driving circuit includes a twenty-third transistor
- the third reset circuit includes a twenty-fifth transistor
- the fourth initialization circuit includes a second sixteen transistor
- the third storage circuit includes a third storage capacitor
- the fourth illumination circuit includes a fourth organic light emitting diode.
- the source of the twentieth transistor is electrically connected to the third data signal end, the gate of the twentieth transistor, and the second twelve transistor a gate electrically connected to the second control terminal, a drain of the twentieth transistor, a drain of the twenty-first transistor, a source of the twenty-second transistor, and the twentieth a source of the three transistors is electrically connected; a gate of the twenty-first transistor, a gate of the twenty-fourth transistor, and the fourth control terminal are electrically connected, a source of the twenty-first transistor, a first end of the third storage capacitor is electrically connected to the first power supply terminal; a drain of the twenty-second transistor is electrically connected to a third node; a gate of the twenty-third transistor and the The third node is electrically connected, the drain of the twenty-third transistor is electrically connected to the source of the twenty-fourth transistor; the drain of the twenty-fourth transistor, and the drain of the second sixteen transistor The pole is electrically connected to the first end of
- the twentieth transistor, the twenty-first transistor, the twenty-second transistor, the twenty-third transistor, and the twenty-fourth The transistor, the twenty-fifth transistor, and the twenty-sixth transistor are all thin film transistors.
- the twentieth transistor, the first The twenty-first transistor, the twenty-second transistor, the twenty-third transistor, the twenty-fourth transistor, the twenty-fifth transistor, and the second sixteen transistor are all P-type transistors.
- Embodiments of the present disclosure also provide a display panel including the pixel circuit of any of the embodiments of the present disclosure.
- a display panel provided by an embodiment of the present disclosure includes a pixel circuit having a first organic light emitting diode, a second organic light emitting diode, and a third organic light emitting diode, and a pixel circuit having a fourth organic light emitting diode.
- the first organic light emitting diode emits red light during operation
- the second organic light emitting diode emits green light during operation
- the third organic light emitting diode emits yellow light during operation
- the four organic light emitting diodes emit blue light during operation.
- An embodiment of the present disclosure further provides a driving method of a pixel circuit, including: a reset phase, a compensation phase, an initialization phase, and an illumination phase, wherein, in the reset phase, the first control terminal outputs a valid signal, where the The second control terminal outputs an invalid signal, the third control terminal outputs an invalid signal, the fourth control terminal outputs an invalid signal, the first data signal terminal outputs a standby signal, and the second data signal terminal outputs a standby signal;
- the first control terminal outputs an invalid signal
- the second control terminal outputs a valid signal
- the third control terminal outputs an invalid signal
- the fourth control terminal outputs an invalid signal
- the first data The signal end outputs a first data signal, and the second data signal end outputs a standby signal; or the first data signal end outputs a standby signal, and the second data signal end outputs a second data signal; or, the a data signal end outputs a first data signal, and the second data signal end outputs a second data signal; in the
- the driving method provided by the embodiment of the present disclosure further includes: a pre-reset phase and a pre-lighting phase, wherein the pre-reset phase is after the lighting phase and before the reset phase, and the pre-lighting phase is in the initialization phase And before the illuminating phase, in the pre-reset phase, the first control terminal outputs an invalid signal, and the second control terminal outputs an invalid signal, the third control The terminal outputs an invalid signal, the fourth control terminal outputs an invalid signal, the first data signal terminal outputs a standby signal, and the second data signal terminal outputs a standby signal; in the pre-lighting phase, the first control terminal Outputting an invalid signal, the second control terminal outputs an invalid signal, the third control terminal outputs an invalid signal, the fourth control terminal outputs an invalid signal, and the first data signal terminal outputs a standby signal, the second data The signal terminal outputs a standby signal.
- the first light emitting The circuit is separately illuminated, the first data signal is used to control the brightness of the first light emitting circuit; when the first data signal end outputs a standby signal, and the second data signal end outputs the second data signal, the The second lighting circuit is separately illuminated, the second data signal is used to control the brightness of the second lighting circuit; when the first data signal end outputs the first data signal, the second data signal end outputs When the data signal is two, the first lighting circuit, the second lighting circuit and the third lighting circuit simultaneously emit light, and the first data signal is used to control the brightness of the first lighting circuit, the first The second data signal is used to control the brightness of the second lighting circuit, and the smaller of the first data signal and the second data signal is used to control the third light Emission luminance of the road.
- An embodiment of the present disclosure further provides a driving method of a pixel circuit, including: a reset phase, a compensation phase, an initialization phase, and an illumination phase, wherein, in the reset phase, the first control terminal outputs a valid signal, where the The second control terminal outputs an invalid signal, the third control terminal outputs an invalid signal, the fourth control terminal outputs an invalid signal, and the third data signal terminal outputs a standby signal; in the compensation phase, the first control terminal Outputting an invalid signal, the second control terminal outputs a valid signal, the third control terminal outputs an invalid signal, the fourth control terminal outputs an invalid signal, and the third data signal terminal outputs a third data signal or a standby signal; In the initialization phase, the first control terminal outputs an invalid signal, the second control terminal outputs an invalid signal, the third control terminal outputs a valid signal, and the fourth control terminal outputs an invalid signal, the third The data signal terminal outputs a standby signal; in the lighting phase, the first control terminal outputs an invalid signal, and the second control terminal
- the driving method provided by the embodiment of the present disclosure further includes: a pre-reset phase and a pre-emission phase, wherein the pre-reset phase is after the illuminating phase and before the reset phase, the pre-emission
- the optical phase is after the initializing phase and before the lighting phase
- the first control terminal outputs an invalid signal
- the second control terminal outputs an invalid signal
- the third control terminal outputs an invalid signal
- a signal, the fourth control terminal outputs an invalid signal
- the third data signal terminal outputs a standby signal
- the first control terminal outputs an invalid signal
- the second control terminal outputs an invalid signal
- the third control terminal outputs an invalid signal
- the fourth control terminal outputs an invalid signal
- the third data signal terminal outputs a standby signal.
- An embodiment of the present disclosure further provides a driving method, including: a reset phase, a compensation phase, an initialization phase, and an illumination phase, wherein, in the reset phase, the first control terminal outputs a valid signal, and the second control terminal Outputting an invalid signal, the third control terminal outputs an invalid signal, the fourth control terminal outputs an invalid signal, the first data signal terminal outputs a standby signal, and the second data signal terminal outputs a standby signal, the third The data signal terminal outputs a standby signal; in the compensation phase, the first control terminal outputs an invalid signal, the second control terminal outputs a valid signal, the third control terminal outputs an invalid signal, and the fourth control terminal outputs An invalid signal, the first data signal end outputs a first data signal, the second data signal end outputs a standby signal, and the third data signal end outputs a third data signal or a standby signal; or the first data The signal end outputs a standby signal, the second data signal end outputs a second data signal, and the third data signal end output
- FIG. 1 is a schematic diagram of a pixel circuit according to an embodiment of the present disclosure
- FIG. 2 is a second schematic diagram of a pixel circuit according to an embodiment of the present disclosure.
- FIG. 3 is a timing chart of driving when the first organic light emitting diode is separately illuminated in the pixel circuit shown in FIG. 2 according to an embodiment of the present disclosure
- FIG. 4A is a schematic diagram of a conductive state in a pre-reset phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure
- FIG. 4B is a schematic diagram showing a conductive state of the pixel circuit shown in FIG. 2 in the reset phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3;
- FIG. 4C is a schematic diagram of a conductive state in a compensation phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure
- FIG. 4D is a schematic diagram of a conductive state in an initialization phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure
- FIG. 4E is a schematic diagram of a conductive state in a pre-lighting phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure
- FIG. 4F is a schematic diagram of a conductive state of the pixel circuit shown in FIG. 2 when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3;
- FIG. 5 is a timing chart of driving when the first organic light emitting diode, the second organic light emitting diode, and the third organic light emitting diode are simultaneously illuminated in the pixel circuit shown in FIG. 2 according to an embodiment of the present disclosure
- FIG. 6A is a schematic diagram of a conductive state in a pre-reset phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure
- FIG. 6B is a schematic diagram of a conductive state in a reset phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure
- FIG. 6C is a schematic diagram of a conductive state in a compensation phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure
- FIG. 6D is a schematic diagram of a conductive state in an initialization phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure
- FIG. 6E is a schematic diagram of a conductive state in a pre-lighting phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure
- FIG. 6F is a schematic diagram of a conductive state of the pixel circuit shown in FIG. 2 when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5;
- FIG. 7 is a schematic diagram of still another pixel circuit according to an embodiment of the present disclosure.
- FIG. 8 is a second schematic diagram of a pixel circuit according to an embodiment of the present disclosure.
- FIG. 9 is a driving timing diagram of the pixel circuit shown in FIG. 8 according to an embodiment of the present disclosure.
- FIG. 10A is a schematic diagram of a conductive state in a pre-reset phase when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure
- FIG. 10B is a schematic diagram of a conductive state in a reset phase when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure
- FIG. 10C is a schematic diagram of a conductive state in a compensation phase when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure
- FIG. 10D is a schematic diagram of a conductive state in an initialization phase when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure
- FIG. 10E is a schematic diagram of a conductive state in a pre-lighting phase when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure
- FIG. 10F is a schematic diagram of a conductive state of the pixel circuit shown in FIG. 8 in the light emitting phase when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9;
- FIG. 11 is a schematic diagram of a display panel according to an embodiment of the present disclosure.
- FIG. 12 is a schematic diagram of driving timings when the first organic light emitting diode and the fourth organic light emitting diode emit light, the second organic light emitting diode, and the third organic light emitting diode are turned off in a driving method according to an embodiment of the present disclosure.
- the OLED display panel generally includes a plurality of pixel units, each of which includes a plurality of sub-pixels of an OLED capable of emitting light of different colors, and each OLED can be driven by a respective pixel circuit, but the area occupied by the pixel circuit is large, which affects The resolution of the display panel.
- Embodiments of the present disclosure provide a pixel circuit, a display panel, and a driving method, which can reduce the area occupied by the pixel circuit, improve the resolution of the display panel, and can initialize and discharge the organic light emitting diode to ensure low gray scale. Accuracy and full black under the full dark state image, effectively improving the contrast of the entire display panel.
- FIG. 1 is one schematic diagram of a pixel circuit provided by an embodiment of the present disclosure.
- an embodiment of the present disclosure provides a pixel circuit 100 including: a first lighting circuit 102 for emitting light during operation; a first driving circuit 104 for driving the first lighting circuit 102; a compensation circuit 106 for compensating the first driving circuit 104; a first data writing circuit 108 for writing data to the first driving circuit 104; a first reset circuit 110 for resetting the first driving circuit 104; a storage circuit 112 for storing the driving voltage of the first driving circuit 104; a first initialization circuit 114 for initializing the first lighting circuit 102; and a first lighting control circuit 116 for controlling the operation of the first lighting circuit 102 And turning off, for example, the first illuminating control circuit 116 includes a first portion 116A and a second portion 116B; a second illuminating circuit 118 for illuminating during operation; and a second driving circuit 120 for driving the second illuminating
- the second storage circuit 128 is configured to store the driving voltage of the second driving circuit 120; the second initialization circuit 130 is configured to initialize the second lighting circuit 118; and the second lighting control circuit 132 is configured to control the second lighting circuit 118.
- Working and shutting down for example, the second lighting control circuit 132 includes a first portion 132A and a second portion 132B; a third lighting circuit 134 for emitting light during operation; and a third lighting control circuit 136 for controlling the third lighting circuit
- the operation and shutdown of 134 for example, the third illumination control circuit 136 includes a first portion 136A and a second portion 136B; a third drive circuit 138 for driving the third illumination circuit 134, for example, the third driver circuit 138 includes a first portion 138A and a second portion 138B; a third initialization circuit 140 for initializing the third lighting circuit 134; the first power terminal ELVDD,
- the first lighting voltage Velvdd is provided to the first lighting circuit 102, the second lighting circuit 118, and the third lighting
- the second control circuit 122 operates and turns off the second control signal.
- the third control terminal Sn+1 is configured to provide control for the first initialization circuit 114, the second initialization circuit 130, and the third initialization circuit 140 to operate and turn off. of Third control signal; En and a fourth control terminal, for providing a first light emitting control circuit 102, a second light emitting control circuit 132, a fourth control signal a third emission control circuit 136 and off work.
- FIG. 2 is a schematic diagram of a pixel circuit provided by an embodiment of the present disclosure
- FIG. 2 is a specific implementation of the pixel circuit shown in FIG. 1.
- the first data writing circuit 108 includes a first transistor T1; the first lighting control circuit 116 includes a second transistor T2 and a fifth transistor T5.
- the first portion 116A of the first illumination control circuit 116 includes a second transistor T2, the second portion 116B of the first illumination control circuit 116 includes a fifth transistor T5; the first compensation circuit 106 includes a third transistor T3;
- the circuit 104 includes a fourth transistor T4;
- the first reset circuit 110 includes a sixth transistor T6;
- the first initialization circuit 114 includes a seventh transistor T7;
- the first storage circuit 112 includes a first storage capacitor C1; and the first lighting circuit 102 includes a first The organic light emitting diode OLED1;
- the third light emitting control circuit 136 includes an eighth transistor T8 and an eleventh transistor T11.
- the first portion 136A of the third light emitting control circuit 136 includes an eighth transistor T8, and the second light emitting control circuit 136 is second.
- the portion 136B includes an eleventh transistor T11;
- the third driving circuit 138 includes a ninth transistor T9 and a tenth transistor T10, for example, the first portion of the third driving circuit 138
- the minute 138A includes a ninth transistor T9
- the second portion 138B of the third driving circuit 138 includes a tenth transistor T10;
- the third initialization circuit 140 includes a twelfth transistor T12;
- the second reset circuit 126 includes a thirteenth transistor T13;
- the illumination control circuit 132 includes a fourteenth transistor T14 and an eighteenth transistor T18.
- the first portion 132A of the second illumination control circuit 132 includes a fourteenth transistor T14
- the second portion 132B of the second illumination control circuit 132 includes an eighteenth transistor T18
- the second data write circuit 124 includes a fifteenth transistor T15
- the second compensation circuit 122 includes a sixteenth transistor T16
- the second drive circuit 120 includes Seventeen transistor T17
- second initialization circuit 130 includes a nineteenth transistor T19
- second memory circuit 128 includes a second storage capacitor C2
- second light emitting circuit 118 includes a second organic light emitting diode OLED2
- third light emitting circuit 134 includes a third Organic light emitting diode OLED3.
- the third transistor T3 includes a first sub-transistor and a second sub-transistor.
- the source of the first sub-transistor serves as the source of the third transistor T3, and the drain and the second sub-transistor
- the source of the transistor is electrically connected
- the drain of the second sub-transistor serves as the drain of the third transistor T3
- the gate of the first sub-transistor and the gate of the second sub-transistor are electrically connected together as the gate of the third transistor T3.
- the sixteenth transistor T16 includes a third sub-transistor and a fourth sub-transistor.
- the source of the third sub-transistor serves as a source of the sixteenth transistor T16, and the drain of the third sub-transistor is electrically connected to the source of the fourth sub-transistor.
- the drain of the fourth sub-transistor serves as the drain of the sixteenth transistor T16, and the gate of the third sub-transistor and the gate of the fourth sub-transistor are electrically connected together as the gate of the sixteenth transistor T16.
- the third transistor T3 and the sixteenth transistor T16 are configured in such a manner that at least one of the first sub-transistor and the second sub-transistor is in a saturation region, and at least one of the third sub-transistor and the fourth sub-transistor is in a saturation region .
- the embodiments of the present disclosure include, but are not limited to, the third transistor T3 and the sixteenth transistor T16.
- the third transistor T3 may include only one transistor, and the sixteenth transistor T16 may also include only one. Transistor.
- Other transistors in the embodiments of the present disclosure may also be set according to the actual configuration of the third transistor T3 or the sixteenth transistor T16. Similar conversions are within the protection scope of the present disclosure.
- the source of the first transistor T1 is electrically connected to the first data signal terminal Data1, the gate of the first transistor T1, and the third transistor T3.
- the gate and the second control terminal Sn are electrically connected, the drain of the first transistor T1, the drain of the second transistor T2, the source of the third transistor T3 and the source of the fourth transistor T4 are electrically connected;
- the second transistor T2 The gate of the gate, the fifth transistor T5 and the fourth control terminal En are electrically connected, the source of the second transistor T2, the first end of the first storage capacitor C1 and the first power supply terminal ELVDD are electrically connected;
- the third transistor T3 The drain is electrically connected to the first node N1;
- the gate of the fourth transistor T4 is electrically connected to the first node N1, the drain of the fourth transistor T4 is electrically connected to the source of the fifth transistor T5;
- the drain of the fifth transistor T5 a drain of the seventh transistor T7 and the first organic light emitting di
- the drain of the eighth transistor T8 is electrically connected to the source of the ninth transistor T9; the gate of the ninth transistor T9 is electrically connected to the first node N1, and the drain of the ninth transistor T9 is electrically connected to the source of the tenth transistor T10.
- the gate of the tenth transistor T10 is electrically connected to the second node N2, the drain of the tenth transistor T10 is electrically connected to the source of the eleventh transistor T11; the gate of the eleventh transistor T11 and the fourth control terminal En are electrically connected Connecting, the drain of the eleventh transistor T11, the first of the third organic light emitting diode OLED3 And electrically connected to the drain of the twelfth transistor T12; the gate of the twelfth transistor T12 is electrically connected to the third control terminal Sn+1, the source of the twelfth transistor T12, the drain of the thirteenth transistor T13,
- the source of the nineteenth transistor T19 is electrically connected to the third power supply terminal Vx; the source of the thirteenth transistor T13 is electrically connected to the second node N2, and the gate of the thirteenth transistor T13 is electrically connected to the first control terminal Sn-1.
- the source of the fourteenth transistor T14, the first end of the second storage capacitor C2 and the first power supply terminal ELVDD are electrically connected, the gate of the fourteenth transistor T14, the gate of the eighteenth transistor T18, and the fourth control terminal En electrically connected, the drain of the fourteenth transistor T14, the drain of the fifteenth transistor T15, the source of the sixteenth transistor T16 and the source of the seventeenth transistor T17 are electrically connected; the source of the fifteenth transistor T15
- the second data signal terminal Data2 is electrically connected, the gate of the fifteenth transistor T15, the gate of the sixteenth transistor T16 and the second control terminal Sn are electrically connected; the drain of the sixteenth transistor T16 and the second node N2 are electrically connected Connection; the gate of the seventeenth transistor T17 is electrically connected to the second node N2, the seventeenth transistor
- the drain of T17 is electrically connected to the source of the eighteenth transistor T18; the drain of the eighteenth transistor T18, the drain of the nineteenth transistor T19
- the sixteen transistor T16, the seventeenth transistor T17, the eighteenth transistor T18, and the nineteenth transistor T19 are all thin film transistors.
- the seventeen transistor T17, the eighteenth transistor T18, and the nineteenth transistor T19 are all P-type transistors.
- the transistors used in the embodiments of the present disclosure may each be a thin film transistor or a field effect transistor or other switching devices having the same characteristics.
- the source and drain of the transistor used here may be structurally symmetrical, so that the source and the drain may be structurally indistinguishable.
- one of the extreme source and the other is the drain. Therefore, the source and the drain of all or part of the transistor in the embodiment of the present disclosure. It is interchangeable as needed.
- the transistors can be divided into N-type and P-type transistors according to the characteristics of the transistors. Embodiments of the present disclosure are described by taking a P-type transistor as an example.
- the first organic light emitting diode OLED1 emits light of a first color when in operation
- the second organic light emitting diode OLED2 emits light of a second color when in operation
- a third organic light emitting The diode OLED 3 emits light of a third color during operation, and the mixed color of the light of the first color and the light of the second color is the third color.
- the light of the first color is red light
- the light of the second color is green light
- the light of the third color is yellow light.
- the mixed color of red and green is yellow.
- the pixel circuit 100 simultaneously controls the first organic light emitting diode OLED1, the second organic light emitting diode OLED2, and the third organic light emitting diode OLED3, thereby saving the number of pixel circuits as a whole, thereby reducing the area occupied by the pixel circuit and improving The resolution of the display panel.
- the first organic light emitting diode OLED1 and the second organic light emitting diode OLED2 may emit light separately, or may be the first organic light emitting diode OLED1, the second organic light emitting diode OLED2, and the third organic light emitting diode OLED3. Light at the same time.
- the combined brightness of the first organic light emitting diode OLED1 and the second organic light emitting diode OLED2 may be replaced by the brightness of the third organic light emitting diode OLED3 according to the display screen.
- the display screen in which the third organic light emitting diode OLED3 is required to emit light The first organic light emitting diode OLED1, the second organic light emitting diode OLED2, and the third organic light emitting diode OLED3 emit light at the same time, which is equivalent to increasing the area of the first organic light emitting diode OLED1 and the second organic light emitting diode OLED2.
- the threshold voltage of the fourth transistor T4 is equal to the threshold voltage of the ninth transistor T9
- the threshold voltage of the tenth transistor T10 is equal to the threshold voltage of the seventeenth transistor T17.
- Embodiments of the present disclosure also provide a driving method of a pixel circuit as shown in FIG. 2, the driving method including: a reset phase, a compensation phase, an initialization phase, and an illumination phase.
- the first control terminal Sn-1 outputs an effective signal
- the second control terminal Sn outputs an invalid signal
- the third control terminal Sn+1 outputs an invalid signal
- the fourth control terminal En outputs an invalid signal
- the standby signal is output
- the second data signal end Data2 outputs a standby signal
- the first control terminal Sn-1 outputs an invalid signal
- the second control terminal Sn outputs an effective signal
- the third control terminal Sn+1 outputs an invalid signal
- the fourth control terminal En outputs an invalid signal, the first data signal end Data1 outputs a first data signal, and the second data signal end Data2 outputs a standby signal; or the first data signal end Data1 outputs a standby signal, and the second data signal end Data2 outputs a second Second data signal;
- the driving method provided by the embodiment of the present disclosure may further include: a pre-reset phase and a pre-lighting phase, the pre-lighting phase is after the lighting phase and before the reset phase, and the pre-lighting phase is pre-reset after the initialization phase and before the lighting phase.
- the first control terminal Sn-1 outputs an invalid signal
- the second control terminal Sn outputs an invalid signal
- the third control terminal Sn+1 outputs an invalid signal
- the fourth control terminal En outputs an invalid signal
- the first data signal terminal Data1 outputs standby.
- the signal, the second data signal end Data2 outputs a standby signal; in the pre-lighting phase, the first control terminal Sn-1 outputs an invalid signal, the second control terminal Sn outputs an invalid signal, and the third control terminal Sn+1 outputs an invalid signal, and the fourth The control terminal En outputs an invalid signal, the first data signal terminal Data1 outputs a standby signal, and the second data signal terminal Data2 outputs a standby signal.
- the first lighting circuit 102 emits light alone.
- a data signal is used to control the brightness of the first light-emitting circuit 102; when the first data signal end Data1 outputs a standby signal, and the second data signal end Data2 outputs a second data signal, the second light-emitting circuit 118 emits light separately, the second data
- the signal is used to control the brightness of the second light-emitting circuit 118; when the first data signal end Data1 outputs the first data signal, and the second data signal end Data2 outputs the second data signal, the first light-emitting circuit 102 and the second light-emitting circuit 118 Simultaneously emitting light with the third lighting circuit 134, the first data signal is used to control the brightness of the first lighting circuit 102, and the second data signal is used to control the brightness of the second lighting circuit 118
- the effective signal in the embodiment of the present disclosure refers to a signal that enables the corresponding circuit or transistor to be turned on
- the invalid signal refers to a signal that enables the corresponding circuit or transistor to be turned off, the first data signal and the second data signal. It refers to a signal (such as a low-level signal) that contains information on the luminance of the corresponding light-emitting circuit or organic light-emitting diode.
- the standby signal refers to a signal (such as a high-level signal) that can cause the corresponding light-emitting circuit or the organic light-emitting diode to not emit light.
- the transistor when the transistor is a P-type transistor
- the effective signal refers to a low level signal
- the invalid signal refers to a high level signal
- the specific voltage value of the low level signal and the high level signal can be correspondingly set according to the properties of the transistor.
- FIG. 3 is a driving timing diagram of the first organic light emitting diode in the pixel circuit shown in FIG. 2 when the first organic light emitting diode is separately illuminated.
- an embodiment of the present disclosure provides a driving method of a pixel circuit as shown in FIG. 2, including: a pre-reset phase t1, a reset phase t2, a compensation phase t3, an initialization phase t4, a pre-emission phase t5, and an illumination phase. T6.
- the first control terminal Sn-1 outputs a high-level signal
- the second control terminal Sn outputs a high-level signal
- the third control terminal Sn+1 outputs a high-level signal
- the high level signal is output
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 4A is a schematic diagram of a conducting state in a pre-reset phase t1 when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure.
- the pre-reset phase t1 the first transistor T1, the second transistor T2, the third transistor T3, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the eleventh transistor T11, and the twelfth
- the transistor T12, the thirteenth transistor T13, the fourteenth transistor T14, the fifteenth transistor T15, the sixteenth transistor T16, the eighteenth transistor T18, and the nineteenth transistor T19 are all in a closed state, and no path is formed in the pixel circuit;
- the conduction states of the fourth transistor T4, the ninth transistor T9, the tenth transistor T10, and the seventeenth transistor T17 are related to the voltages of the first node N1 and the second node N2.
- the pre-reset phase can provide a stable time for the
- the first control terminal Sn-1 outputs a low level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En outputs The high level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 4B is a schematic diagram of a conductive state in the reset phase t2 when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure.
- the first transistor T1, the second transistor T2, the third transistor T3, the fifth transistor T5, the seventh transistor T7, the eighth transistor T8, the eleventh transistor T11, the twelfth transistor T12, and the fourteenth Transistor T14, fifteenth transistor T15, sixteenth transistor T16, eighteenth transistor T18 and nineteenth transistor T19 is in a closed state; since the first control terminal Sn-1 outputs a low level signal, the sixth transistor T6 and the thirteenth transistor T13 are turned on, and the voltages of the first node N1 and the second node N2 are the third power terminal Vx.
- the reset voltage Vvx is provided, and the reset voltage Vvx is, for example, a low-level voltage that enables the P-type transistor to be turned on, and, for example, the reset voltage Vvx is a negative voltage; at this time, since the voltages of the first node N1 and the second node N2 are low
- the level reset voltage Vvx, the fourth transistor T4, the ninth transistor T9, the tenth transistor T10, and the seventeenth transistor T17 are turned on but do not form a via.
- the fourth transistor T4 and the ninth transistor T9 are reset by the sixth transistor T6, and the tenth transistor T10 and the seventeenth transistor T17 are reset by the thirteenth transistor T13, that is, the first reset circuit will drive the first driving circuit.
- the second reset circuit resets the second drive circuit, and the first reset circuit and the second reset circuit collectively reset the third drive circuit.
- the voltage difference between the first node N1 and the first data signal Vdata1 may be increased through the reset phase, and the charging time of the first storage capacitor C1 in the compensation phase t3 is reduced.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a low level signal
- the third control terminal Sn+1 outputs a high level signal
- the first data signal terminal Data1 outputs a first data signal Vdata1 (for example, a low level signal)
- the second data signal terminal Data2 outputs a high level signal.
- FIG. 4C is a schematic diagram of a conducting state in the compensation phase t3 when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure.
- the second transistor T2 the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the tenth transistor T10, the eleventh transistor T11, the twelfth transistor T12, the thirteenth The transistor T13, the fourteenth transistor T14, the seventeenth transistor T17, the eighteenth transistor T18 and the nineteenth transistor T19 are all in a closed state; since the second control terminal Sn outputs a low level signal, the first transistor T1, the third transistor The transistor T3, the fifteenth transistor T15 and the sixteenth transistor T16 are turned on, and the first data signal Vdata1 outputted by the first data signal terminal Data1 is transmitted to the first node N1 through the first transistor T1 and the third transistor T3, to the first After the charging capacitor C1 is completed, the voltage of the first node
- the first compensation circuit compensates the first driving circuit.
- the fourth transistor T4 and the ninth transistor T9 are turned on but no path is formed; the high level signal output of the second data signal terminal Data2 is Fifteenth transistor T15 and a sixteenth transistor T16 is transmitted to the second node N2, the voltage of the second node N2 is high level, the first The ten transistor T10 and the seventeenth transistor T17 are in a closed state.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a low level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- the initial discharge of the organic light emitting diode ensures the accuracy of the low gray scale and the total black under the full dark state image, which can effectively improve the contrast of the entire display panel.
- FIG. 4D is a schematic diagram of a conduction state in the initialization phase t4 when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure.
- the first transistor T1, the second transistor T2, the third transistor T3, the fifth transistor T5, the sixth transistor T6, the eighth transistor T8, the tenth transistor T10, the eleventh transistor T11, and the thirteenth transistor T13, the fourteenth transistor T14, the fifteenth transistor T15, the sixteenth transistor T16, the seventeenth transistor T17 and the eighteenth transistor T18 are all in a closed state;
- the fourth transistor is operated due to the storage voltage of the first storage capacitor C1 T4 and the ninth transistor T9 maintain the same on state as the compensation phase t3; since the third control terminal Sn+1 outputs a low level signal, the seventh transistor T7, the twelfth transistor T12 and the nineteenth transistor T19 are turned on,
- the reset voltage Vvx provided by the three power terminals Vx is transmitted to
- the T12 is transmitted to the first electrode of the third organic light emitting diode OLED2 (the first pole is, for example, an anode), and the reset voltage Vvx provided by the third power terminal Vx is transmitted to the second organic light through the nineteenth transistor T19.
- a first diode OLED2 electrode (the first electrode is an anode, for example), i.e., a first initializing circuit initializes the first light-emitting circuit, a second initialization circuit initializes the second light-emitting circuit, the third initializing circuit initializes a third lighting circuit.
- the reset voltage Vvx is less than or equal to the second illuminating voltage Velvss provided by the second power supply terminal ELVSS, such that the initialization can prevent abnormal luminescence of the OLED, for example, the illuminating of the OLED in the non-emission phase can be prevented.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En The high level signal is output
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 4E is a diagram showing the pixel circuit shown in FIG. 2 as shown in FIG. Schematic diagram of the conduction state in the pre-lighting phase t5 when the timing is driven.
- the pre-emission phase t5 the first transistor T1, the second transistor T2, the third transistor T3, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the tenth transistor T10, and the eleventh transistor T11, the twelfth transistor T12, the thirteenth transistor T13, the fourteenth transistor T14, the fifteenth transistor T15, the sixteenth transistor T16, the seventeenth transistor T17, the eighteenth transistor T18 and the nineteenth transistor T19 are both In the off state, no path is formed in the pixel circuit; the fourth transistor T4 and the ninth transistor T9 maintain the same on state as the initialization phase t4 due to the storage voltage of the first storage capacitor C1.
- the pre-lighting phase can provide a stable time for the pixel circuit to stabilize the voltage and current states of the various circuit components and
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 4F is a schematic diagram of a conductive state in the light-emitting phase t6 when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 3 according to an embodiment of the present disclosure.
- the six transistors T16, the seventeenth transistor T17 and the nineteenth transistor T19 are all in a closed state; the fourth transistor T4 and the ninth transistor T9 remain in the same on state as the pre-lighting phase t5 due to the storage voltage of the first storage capacitor C1.
- the fourth control terminal En outputs a low level signal
- the second transistor T2, the fifth transistor T5, the eighth transistor T8, the eleventh transistor T11, the fourteenth transistor T14, and the eighteenth transistor T18 are in an on state
- a power supply terminal ELVDD, a second transistor T2, a fourth transistor T4, a fifth transistor T5, a first organic light emitting diode OLED1 and a second power supply terminal ELVSS form a path
- the first organic light emitting diode OLED1 is provided at the first power supply terminal ELVDD a illuminating voltage Velvdd and a second illuminating voltage Velvss provided by the second power supply terminal ELVSS, and driving under the driving of the fourth transistor T4, that is, the first illuminating control electric
- the first power supply terminal supplies a first lighting voltage to the first lighting circuit
- the second power terminal provides a second lighting voltage to the first lighting circuit
- the first driving circuit drives the first lighting circuit.
- a lighting circuit emits light during operation.
- the driving method of the pixel circuit shown in FIG. 2 may only include the reset phase t2.
- the compensation phase t3, the initialization phase t4 and the illumination phase t6, without including the pre-reset phase t1 and the pre-emission phase t5, or one of the pre-reset phase t1 and the pre-emission phase t5, are not limited herein.
- the case when the second organic light emitting diode emits light alone is similar to the case when the first organic light emitting diode is separately illuminated, and will not be described herein.
- FIG. 5 is a timing chart of driving when the first organic light emitting diode, the second organic light emitting diode, and the third organic light emitting diode are simultaneously illuminated in the pixel circuit shown in FIG. 2 according to an embodiment of the present disclosure.
- an embodiment of the present disclosure provides a driving method of a pixel circuit as shown in FIG. 2, including: a pre-reset phase t1, a reset phase t2, a compensation phase t3, an initialization phase t4, a pre-emission phase t5, and an illumination phase. T6.
- the first control terminal Sn-1 outputs a high-level signal
- the second control terminal Sn outputs a high-level signal
- the third control terminal Sn+1 outputs a high-level signal
- the high level signal is output
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 6A is a schematic diagram of a conducting state in a pre-reset phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure.
- the pre-reset phase t1 the first transistor T1, the second transistor T2, the third transistor T3, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the eleventh transistor T11, and the twelfth
- the transistor T12, the thirteenth transistor T13, the fourteenth transistor T14, the fifteenth transistor T15, the sixteenth transistor T16, the eighteenth transistor T18, and the nineteenth transistor T19 are all in a closed state, and no path is formed in the pixel circuit;
- the conduction states of the fourth transistor T4, the ninth transistor T9, the tenth transistor T10, and the seventeenth transistor T17 are related to the voltages of the first node N1 and the second node N2.
- the pre-reset phase can provide a stable time for the pixel circuit
- the first control terminal Sn-1 outputs a low level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En outputs The high level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 6B is a schematic diagram of a conductive state in a reset phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure.
- the sixteenth transistor T16, the eighteenth transistor T18 and the nineteenth transistor T19 are all in a closed state; since the first control terminal Sn-1 outputs a low level signal, the sixth transistor T6 and the thirteenth transistor T13 are turned on, first The voltages of the node N1 and the second node N2 are the reset voltage Vvx provided by the third power terminal Vx, and the reset voltage Vvx is, for example, a low level voltage that enables the P-type transistor to be turned on, and for example, the reset voltage Vvx is a negative voltage; Since the voltages of
- the fourth transistor T4 and the ninth transistor T9 are reset by the sixth transistor T6, and the tenth transistor T10 and the seventeenth transistor T17 are reset by the thirteenth transistor T13, that is, the first reset circuit will drive the first driving circuit.
- the second reset circuit resets the second drive circuit, and the first reset circuit and the second reset circuit collectively reset the third drive circuit.
- the voltage difference between the first node N1 and the first data signal Vdata1 can be increased, and the voltage difference between the second node N2 and the second data signal Vdata2 can be increased, thereby reducing the compensation phase t3.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a low level signal
- the third control terminal Sn+1 outputs a high level signal
- the first data signal terminal Data1 outputs a first data signal Vdata1 (eg, a low level signal)
- the second data signal terminal Data2 outputs a second data signal Vdata2 (eg, a low level signal).
- FIG. 6C is a schematic diagram of a conducting state in a compensation phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure.
- the compensation phase t3 the second transistor T2, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the tenth transistor T10, the eleventh transistor T11, the twelfth transistor T12, the thirteenth The transistor T13, the fourteenth transistor T14, the seventeenth transistor T17, the eighteenth transistor T18 and the nineteenth transistor T19 are all in a closed state; since the second control terminal Sn outputs a low level signal, the first transistor T1, the third transistor The transistor T3, the fifteenth transistor T15 and the sixteenth transistor T16 are turned on, and the first data signal Vdata1 outputted by the first data signal terminal Data1 is transmitted to the first node N1 through the first transistor T1 and the third transistor T3, to the first After the storage capacitor C1 is charged, the voltage of the first node
- the fourth transistor T4 and the ninth transistor T9 are turned on but no path is formed; the second data signal Vdata2 outputted by the second data signal terminal Data2 is transmitted to the first through the fifteenth transistor T15 and the sixteenth transistor T16 After the second node N2 charges the second storage capacitor C2, the voltage of the second node N2 is Vdata2+Vth2 (Vth2 is the total voltage drop of the fifteenth transistor T15 and the sixteenth transistor T16), that is, the second data.
- the write circuit writes data to the second drive circuit, and the second compensation circuit compensates for the second drive circuit. At this time, the tenth transistor T10 and the seventeenth transistor T17 are turned on but no path is formed.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a low level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 6D is a schematic diagram of an on state in an initialization phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure.
- the first transistor T1, the second transistor T2, the third transistor T3, the fifth transistor T5, the sixth transistor T6, the eighth transistor T8, the tenth transistor T10, the eleventh transistor T11, and the thirteenth transistor T13, the fourteenth transistor T14, the fifteenth transistor T15, the sixteenth transistor T16, the seventeenth transistor T17 and the eighteenth transistor T18 are all in a closed state;
- the fourth transistor is operated due to the storage voltage of the first storage capacitor C1
- the T4 and the ninth transistor T9 maintain the same on state as the compensation phase t3, and the tenth transistor T10 and the seventeenth transistor T17 maintain the same on state as the compensation phase t3 due to the storage voltage of the second storage capacitor C2;
- the control terminal Sn+1 outputs a low level signal, and the seventh transistor T7, the
- a first pole of the light emitting diode OLED1 (the first pole is, for example, an anode), and a reset voltage Vvx provided by the third power terminal Vx is transmitted to the third organic light emitting diode O through the twelfth transistor T12
- the first pole of the LED 2 (the first pole is, for example, an anode), and the reset voltage Vvx provided by the third power terminal Vx is transmitted to the first pole of the second organic light emitting diode OLED2 through the nineteenth transistor T19 (the first pole is, for example, an anode) That is, the first initialization circuit initializes the first lighting circuit, the second initialization circuit initializes the second lighting circuit, and the third initialization circuit initializes the third lighting circuit.
- the reset voltage Vvx is less than Or equal to the second illuminating voltage Velvss provided by the second power terminal ELVSS, such that the initialization can prevent abnormal luminescence of the OLED, for example, the illuminating of the OLED in the non-lighting phase can be prevented.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En The high level signal is output
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 6E is a schematic diagram of a conductive state in a pre-lighting phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure.
- the pre-emission phase t5 the first transistor T1, the second transistor T2, the third transistor T3, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the eleventh transistor T11, and the twelfth
- the transistor T12, the thirteenth transistor T13, the fourteenth transistor T14, the fifteenth transistor T15, the sixteenth transistor T16, the eighteenth transistor T18, and the nineteenth transistor T19 are all in a closed state, and no path is formed in the pixel circuit; Due to the storage voltage of the first storage capacitor C1, the fourth transistor T4 and the ninth transistor T9 maintain the same on state as the initialization phase t4, and the tenth transistor T10 and the seventeenth transistor are functioned by the storage voltage of the second storage capacitor C2.
- T17 remains in the
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal.
- FIG. 6F is a schematic diagram of a conducting state of the pixel circuit shown in FIG. 2 in the light emitting phase when the pixel circuit shown in FIG. 2 is driven by the driving timing shown in FIG. 5 according to an embodiment of the present disclosure.
- the first transistor T1, the third transistor T3, the sixth transistor T6 the seventh transistor T7, the twelfth transistor T12, the thirteenth transistor T13, the fifteenth transistor T15, the sixteenth transistor T16 and the
- the nineteenth transistor T19 is in the off state; the fourth transistor T4 and the ninth transistor T9 maintain the same on state as the pre-emission phase t5 due to the storage voltage of the first storage capacitor C1, due to the storage voltage of the second storage capacitor C2.
- the tenth transistor T10 and the seventeenth transistor T17 maintain the same on state as the compensation phase t5; since the fourth control terminal En outputs a low level signal, the second transistor T2, the fifth transistor T5, the eighth transistor T8, and the tenth One transistor T11, fourteenth transistor T14 and The eighteen transistor T18 is in an on state.
- the first power terminal ELVDD, the second transistor T2, the fourth transistor T4, the fifth transistor T5, the first organic light emitting diode OLED1, and the second power terminal ELVSS form a path;
- the first power terminal ELVDD, the eighth transistor T8, and the ninth transistor T9, the tenth transistor T10, the eleventh transistor T11, the third organic light emitting diode OLED3 and the second power supply terminal ELVSS form a path;
- the first power terminal ELVDD, the fourteenth transistor T14, the seventeenth transistor T17, the eighteenth transistor T18, the second organic light emitting diode OLED2, and the second power supply terminal ELVSS form a via.
- the first organic light emitting diode OLED1 emits light under the action of the first illuminating voltage Velvdd provided by the first power supply terminal ELVDD and the second illuminating voltage Velvss provided by the second power supply terminal ELVSS, and is driven by the fourth transistor T4;
- the LED OLED2 emits light under the action of the first illuminating voltage Velvdd provided by the first power supply terminal ELVDD and the second illuminating voltage Velvss provided by the second power supply terminal ELVSS, and is driven by the seventeenth transistor T17;
- the third organic light emitting diode The OLED 3 emits light under the action of the first illuminating voltage Velvdd provided by the first power supply terminal ELVDD and the second illuminating voltage Velvss provided by the second power supply terminal ELVSS, and is driven by the ninth transistor T9 and the tenth transistor T10;
- the illumination control circuit controls the operation of the first illumination circuit
- the second illumination control circuit controls the operation of the second illumination
- FIG. 7 is one schematic diagram of still another pixel circuit provided by an embodiment of the present disclosure.
- an embodiment of the present disclosure further provides a pixel circuit 200, including: a fourth lighting circuit 202 for emitting light during operation; and a fourth driving circuit 204 for driving the fourth lighting circuit 202; a third compensation circuit 206 for compensating the fourth driving circuit 204; a third data writing circuit 208 for writing data to the fourth driving circuit 204; and a third reset circuit 210 for resetting the fourth driving circuit 204;
- the third storage circuit 212 is configured to store the driving voltage of the fourth driving circuit 204;
- a first power supply terminal ELVDD for supplying a first lighting voltage Velvdd to the fourth lighting circuit 202
- a second power supply terminal ELVSS for supplying a second lighting voltage Velvss to the fourth lighting circuit 202
- Terminal Vx for the third reset circuit
- the reset signal Vvx is provided;
- the third data signal end Data3 is configured to provide a third data signal or a standby signal to the third data writing circuit 208;
- the first control terminal Sn-1 is configured to provide control for the third reset circuit 210 to operate.
- the second control terminal Sn is configured to provide a second control signal that controls the third data writing circuit 208 and the third compensation circuit 206 to operate and turn off; the third control terminal Sn+1, A third control signal for providing control of the operation and shutdown of the fourth initialization circuit 214; and a fourth control terminal En for providing a fourth control signal for controlling the operation and shutdown of the fourth illumination control circuit 216.
- FIG. 8 is a second schematic diagram of still another pixel circuit according to an embodiment of the present disclosure, and FIG. 8 is a specific implementation of the pixel circuit shown in FIG. 7.
- the third data writing circuit 208 includes a twentieth transistor T20
- the fourth lighting control circuit 216 includes a twenty-first transistor T21 and a The twenty-fourth transistor T24
- the third compensation circuit 206 includes a twenty-second transistor T22
- the fourth driving circuit 204 includes a twenty-third transistor T23
- the third reset circuit 210 includes a twenty-fifth transistor T25
- a fourth initialization circuit 214 The twenty-sixth transistor T26 is included
- the third storage circuit 212 includes a third storage capacitor C3
- the fourth light-emitting circuit 202 includes a fourth organic light-emitting diode OLED4.
- the twenty-second transistor T22 includes a fifth sub-transistor and a sixth sub-transistor.
- the source of the fifth sub-transistor serves as the source of the twenty-second transistor T22, and the drain of the fifth sub-transistor.
- Electrically connected to the source of the sixth sub-transistor, the drain of the sixth sub-transistor serves as the drain of the twenty-second transistor T22, and the gate of the fifth sub-transistor and the gate of the sixth sub-transistor are electrically connected together as the second The gate of twelve transistors T22.
- the embodiment of the present disclosure includes, but is not limited to, the composition of the twenty-second transistor T22, and the twenty-second transistor T22 may also include only one transistor.
- the source of the twentieth transistor T20 is electrically connected to the third data signal terminal Data3, and the gate of the twentieth transistor T20 is twentieth.
- the gate of the second transistor T22 is electrically connected to the second control terminal Sn, the drain of the twentieth transistor T20, the drain of the twenty-first transistor T21, the source of the twenty-second transistor T22, and the twenty-third transistor T23.
- the source is electrically connected; the gate of the twenty-first transistor T21, the gate of the twenty-fourth transistor T24 and the fourth control terminal En are electrically connected, the source of the twenty-first transistor T21, and the third storage capacitor C3
- the first end is electrically connected to the first power supply terminal ELVDD; the drain of the twenty-second transistor T22 is electrically connected to the third node N3; the gate of the twenty-third transistor T23 and the third node N3 are electrically connected Connected, the drain of the twenty-third transistor T23 and the source of the twenty-fourth transistor T24 are electrically connected; the drain of the twenty-fourth transistor T24, the drain of the twenty-sixth transistor T26, and the fourth organic light emitting diode OLED4
- the first end is electrically connected; the source of the twenty-fifth transistor T25, the source of the twenty-sixth transistor T26 and the third power terminal Vx are electrically connected, the gate of the twenty-fifth transistor T25 and the first control terminal S
- the twentieth transistor T20, the twenty-first transistor T21, the twenty-second transistor T22, the twenty-third transistor T23, the twenty-fourth transistor T24, and the second The fifteen transistor T25 and the twenty-sixth transistor T26 are thin film transistors.
- the twentieth transistor T20, the twenty-first transistor T21, the twenty-second transistor T22, the twenty-third transistor T23, the twenty-fourth transistor T24, and the second The fifteen transistor T25 and the twenty-sixth transistor T26 are both P-type transistors.
- FIG. 9 is a driving timing diagram of the pixel circuit shown in FIG. 8 according to an embodiment of the present disclosure.
- the embodiment of the present disclosure further provides a driving method of the pixel circuit as shown in FIG. 8, comprising: a pre-reset phase t1, a reset phase t2, a compensation phase t3, an initialization phase t4, a pre-emission phase t5, and an illumination phase t6.
- the first control terminal Sn-1 outputs a high-level signal
- the second control terminal Sn outputs a high-level signal
- the third control terminal Sn+1 outputs a high-level signal
- the fourth control terminal En The high level signal is output
- the third data signal end Data3 outputs a high level signal.
- FIG. 10A is a schematic diagram of a conducting state in a pre-reset phase t1 when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure.
- the twentieth transistor T20, the twenty-first transistor T21, the twenty-second transistor T22, the twenty-fourth transistor T24, the twenty-fifth transistor T25, and the twenty-sixth transistor T26 are all turned off.
- the path is not formed in the pixel circuit; the conduction state of the twenty-third transistor T23 is related to the voltage of the third node N3.
- the pre-reset phase can provide a stable time for the pixel circuit to stabilize the voltage and current states of the various circuit components and prevent circuit anomalies from occurring.
- the first control terminal Sn-1 outputs a low level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the third data signal end Data3 outputs a high level signal.
- FIG. 10B is a schematic diagram of a conductive state in the reset phase t2 when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure.
- the twentieth transistor T20, the twenty-first transistor T21, the twenty-second transistor T22, the twenty-fourth transistor T24, and the twenty-sixth transistor T26 are all in a closed state; since the first control terminal Sn- 1 output low-level signal, the twenty-fifth transistor T25 is turned on, the voltage of the third node N3 is the reset voltage Vvx provided by the third power terminal Vx, and the reset voltage Vvx is, for example, a low-level voltage that enables the P-type transistor to be turned on.
- the reset voltage Vvx is a negative voltage; at this time, since the voltage of the third node N3 is the reset voltage Vvx of the low level, the twenty-third transistor T23 is turned on but does not form a path. This realizes resetting the twenty-third transistor T23 through the twenty-fifth transistor T25, that is, the third reset circuit resets the fourth driving circuit.
- the voltage difference between the third node N3 and the third data signal Vdata3 may be increased through the reset phase, and the charging time of the third storage capacitor C3 in the compensation phase t3 is reduced.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a low level signal
- the third control terminal Sn+1 outputs a high level signal
- the third data signal terminal Data3 outputs a third data signal Vdata3 (eg, a low level signal).
- FIG. 10C is a schematic diagram of a conducting state in the compensation phase t3 when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure.
- the twenty-first transistor T21, the twenty-fourth transistor T24, the twenty-fifth transistor T25 and the twenty-sixth transistor T26 are all in a closed state; since the second control terminal Sn outputs a low level signal, The twenty-transistor T20 and the twenty-second transistor T22 are turned on, and the third data signal Vdata3 outputted by the third data signal terminal Data3 is transmitted to the third node N3 through the twentieth transistor T20 and the twenty-second transistor T22, to the third After the storage capacitor C3 is completed, the voltage of the third node N3 is Vdata3+Vth3 (Vth3 is the total voltage drop of the twentieth transistor T20 and the twenty-second transistor T22), that is, the third data writing circuit is fourth.
- the driving circuit writes the data, and the third compensation circuit
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a low level signal
- the fourth control terminal En outputs A high level signal
- the third data signal end Data3 outputs a high level signal.
- FIG. 10D is a schematic diagram of a conduction state in the initialization phase t4 when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure.
- the twentieth transistor T20, the twenty-first transistor T21, the twenty-second transistor T22, the twenty-fourth transistor T24, and the twenty-fifth transistor T25 are all in a closed state; since the third storage capacitor C3 is stored The role of the voltage, the twenty-third transistor T23 maintains the same on-state as the compensation phase t3; since the third control terminal Sn+1 outputs a low-level signal, the twenty-sixth transistor T26 is turned on, and the third power supply terminal Vx provides The reset voltage Vvx is transmitted to the first pole of the fourth organic light emitting diode OLED4 through the twenty-sixth transistor T26 (the first pole is, for example, an anode), that is, the fourth initialization circuit initializes the fourth lighting circuit.
- the first pole is, for example
- the reset voltage Vvx is less than or equal to the second illuminating voltage Velvss provided by the second power supply terminal ELVSS, such that the initialization can prevent abnormal luminescence of the OLED, for example, the illuminating of the OLED in the non-emission phase can be prevented.
- the initial discharge of the organic light emitting diode ensures the accuracy of the low gray scale and the total black under the full dark state image, which can effectively improve the contrast of the entire display panel.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En The high level signal is output
- the third data signal end Data3 outputs a high level signal.
- FIG. 10E is a schematic diagram of a conductive state in the pre-emission phase t5 when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure.
- the twentieth transistor T20, the twenty-first transistor T21, the twenty-second transistor T22, the twenty-fourth transistor T24, the twenty-fifth transistor T25, and the twenty-sixth transistor T26 are all turned off.
- the path is not formed in the pixel circuit; the 23rd transistor T23 maintains the same on state as the initialization phase t4 due to the storage voltage of the third storage capacitor C3.
- the pre-lighting phase can provide a stable time for the pixel circuit to stabilize the voltage and current states of the various circuit components and prevent circuit anomalies from occurring.
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En outputs The low level signal
- the third data signal end Data3 outputs a high level signal.
- FIG. 10F is a schematic diagram of a conductive state in the light-emitting phase t6 when the pixel circuit shown in FIG. 8 is driven by the driving timing shown in FIG. 9 according to an embodiment of the present disclosure.
- the twentieth transistor T20, the twenty-second transistor T22, the twenty-fifth transistor T25, and the twenty-sixth transistor T26 All are in the off state; due to the storage voltage of the third storage capacitor C3, the twenty-third transistor T23 maintains the same on-state as the pre-emission phase t5; since the fourth control terminal En outputs a low-level signal, the twenty-first transistor The T21 and the twenty-fourth transistor T24 are in an on state, and the first power terminal ELVDD, the twenty first transistor T21, the twenty-third transistor T23, the twenty-fourth transistor T24, the fourth organic light emitting diode OLED4, and the second power terminal
- the ELVSS forms a via, and the fourth organic light emitting diode OLED4 is driven
- the lower illumination that is, the fourth illumination control circuit controls the operation of the fourth illumination circuit
- the first power supply terminal provides a first illumination voltage to the fourth illumination circuit
- the second power supply terminal provides a second illumination voltage to the fourth illumination circuit
- the fourth drive The circuit drives a fourth lighting circuit that emits light during operation.
- the driving method of the pixel circuit shown in FIG. 8 may include only the reset phase t2, the compensation phase t3, the initialization phase t4, and the lighting phase t6, and does not include the pre-reset phase t1 and the pre-lighting phase t5, or includes a pre- One of the reset phase t1 and the pre-lighting phase t5 is not limited herein.
- an embodiment of the present disclosure further provides a display panel 1 including a pixel circuit of any of the embodiments of the present disclosure.
- the display panel 1 includes a plurality of pixel units 10, each of which includes the pixel circuit 100 provided by the embodiment of the present disclosure and the pixel circuit 200 provided by the embodiment of the present disclosure. That is, the display panel 1 provided by the embodiment of the present disclosure includes a pixel circuit having a first organic light emitting diode OLED1, a second organic light emitting diode OLED2, and a third organic light emitting diode OLED3, and a pixel circuit having the fourth organic light emitting diode OLED4. .
- the first organic light emitting diode OLED1 emits red light during operation
- the second organic light emitting diode OLED2 emits green light during operation
- the third organic light emitting diode OLED3 emits during operation.
- Yellow light; the fourth organic light emitting diode OLED4 emits blue light during operation.
- the display panel provided by the embodiment of the present disclosure can be used for any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
- the pixel circuit 100 simultaneously controls the first organic light emitting diode OLED1, the second organic light emitting diode OLED2, and the third organic light emitting diode 2
- the pole tube OLED3 saves the number of pixel circuits, thereby reducing the area occupied by the pixel circuit and improving the resolution of the display panel.
- An embodiment of the present disclosure further provides a driving method, including: a reset phase, a compensation phase, an initialization phase, and an illumination phase.
- a driving method including: a reset phase, a compensation phase, an initialization phase, and an illumination phase.
- the first control terminal Sn-1 outputs a valid signal
- the second control terminal Sn outputs an invalid signal.
- the third control terminal Sn+1 outputs an invalid signal
- the fourth control terminal En outputs an invalid signal
- the first data signal terminal Data1 outputs a standby signal
- the second data signal terminal Data2 outputs a standby signal
- the third data signal terminal Data3 outputs a standby signal
- the first control terminal Sn-1 outputs an invalid signal
- the second control terminal Sn outputs an effective signal
- the third control terminal Sn+1 outputs an invalid signal
- the fourth control terminal En outputs an invalid signal
- the first data signal is output, the second data signal end Data2 outputs a standby signal, and the third data signal end Data3 outputs a third data signal or a standby signal; or the first data signal end Data1 outputs a standby signal, and the second data signal end Data2 outputs a second data signal, the third data signal end Data3 outputs a third data signal or a standby signal; or, the first data signal end Data1 outputs a data signal, the second data signal end Data
- Data3 outputs a standby signal; in the lighting phase, the first control terminal Sn-1 outputs an invalid signal, the second control terminal Sn outputs an invalid signal, the third control terminal Sn+1 outputs an invalid signal, and the fourth control terminal En outputs a valid signal, A data signal terminal Data1 outputs a standby signal, a second data signal terminal Data2 outputs a standby signal, and a third data signal terminal Data3 outputs a standby signal.
- the driving method provided by the embodiment of the present disclosure is for driving the display panel 1.
- the driving method provided by the disclosed embodiment includes a pre-reset phase t1, a reset phase t2, a compensation phase t3, an initialization phase t4, a pre-emission phase t5, and an illumination phase t6.
- the first control terminal Sn-1 outputs a high-level signal
- the second control terminal Sn outputs a high-level signal
- the third control terminal Sn+1 outputs a high-level signal
- the fourth control terminal En Lose A high level signal is output
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal
- the third data signal end Data3 outputs a high level signal
- the first control terminal Sn-1 outputs a low level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En outputs a high level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal
- the third data signal end Data3 outputs a high level signal
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a low level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En outputs a high level signal
- the first data signal end Data1 outputs a first data signal
- the second data signal end Data2 outputs a high level signal
- the third data signal end Data3 outputs a third data signal
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a low level signal
- the fourth control terminal En outputs a high level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal
- the third data signal end Data3 outputs a high level signal
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En Outputting a high level signal
- the first data signal end Data1 outputs a first data signal
- the second data signal end Data2 outputs a high level signal
- the third data signal end Data3 outputs a third data signal
- the first control terminal Sn-1 outputs a high level signal
- the second control terminal Sn outputs a high level signal
- the third control terminal Sn+1 outputs a high level signal
- the fourth control terminal En outputs The low level signal
- the first data signal end Data1 outputs a high level signal
- the second data signal end Data2 outputs a high level signal
- the third data signal end Data3 outputs a high level signal.
- the driving timing can be correspondingly changed. This will not be repeated here.
- the display panel and the driving method provided by the embodiments of the present disclosure can perform initializing discharge on the organic light emitting diode, ensure the accuracy of low gray scale and all black under the full dark state image, and effectively improve the contrast of the entire display panel.
- the combination of the first organic light emitting diode OLED1 and the second organic light emitting diode OLED2 may be replaced by the brightness of the third organic light emitting diode OLED3 according to different display screens. Brightness, in the display screen in which the third organic light emitting diode OLED3 is required to emit light, the first organic light emitting diode OLED1, the second organic light emitting diode OLED2, and the third organic light emitting diode OLED3 may emit light at the same time, which is equivalent to increasing the first organic light emitting.
- the area of the luminescent material of the diode OLED1 and the second organic light emitting diode OLED2 reduces the brightness of the illumination of the first organic light emitting diode OLED1 and the second organic light emitting diode OLED2, thereby increasing the first organic light emitting diode OLED1 and the second organic light emitting diode OLED2 Service life.
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Abstract
一种像素电路(100)、显示面板(1)及驱动方法。该像素电路(100)包括第一发光电路(102)、第一驱动电路(104)、第一补偿电路(106)、第一数据写入电路(108)、第一复位电路(110)、第一存储电路(112)、第一初始化电路(114)、第一发光控制电路(116)、第二发光电路(118)、第二驱动电路(120)、第二补偿电路(122)、第二数据写入电路(124)、第二复位电路(126)、第二存储电路(128)、第二初始化电路(130)、第二发光控制电路(132)、第三发光电路(134)、第三发光控制电路(136)、第三驱动电路(138)以及第三初始化电路(140)。其可以减小像素电路(100)占用的面积,提高显示面板(1)的分辨率,并还可以对有机发光二极管进行初始化放电,保证了低灰阶的准确性及全暗态画面下的全黑,有效改善整个显示面板(1)的对比度。
Description
本公开的实施例涉及一种像素电路、显示面板及驱动方法。
在显示领域,有机发光二极管(OLED)显示面板具有自发光、对比度高、厚度薄、视角广、反应速度快、可用于挠曲性面板、使用温度范围广、制造简单等特点,具有广阔的发展前景。
由于上述特点,有机发光二极管(OLED)显示面板可以适用于手机、显示器、笔记本电脑、数码相机、仪器仪表等具有显示功能的装置。
发明内容
本公开的实施例提供一种像素电路,包括:第一发光电路,用于在工作时发光;第一驱动电路,用于驱动所述第一发光电路;第一补偿电路,用于补偿所述第一驱动电路;第一数据写入电路,用于向所述第一驱动电路写入数据;第一复位电路,用于将所述第一驱动电路复位;第一存储电路,用于存储所述第一驱动电路的驱动电压;第一初始化电路,用于将所述第一发光电路初始化;第一发光控制电路,用于控制所述第一发光电路的工作和关断;第二发光电路,用于在工作时发光;第二驱动电路,用于驱动所述第二发光电路;第二补偿电路,用于补偿所述第二驱动电路;第二数据写入电路,用于向所述第二驱动电路写入数据;第二复位电路,用于将所述第二驱动电路复位;第二存储电路,用于存储所述第二驱动电路的驱动电压;第二初始化电路,用于将所述第二发光电路初始化;第二发光控制电路,用于控制所述第二发光电路的工作和关断;第三发光电路,用于在工作时发光;第三发光控制电路,用于控制所述第三发光电路的工作和关断;第三驱动电路,用于驱动所述第三发光电路;第三初始化电路,用于将所述第三发光电路初始化;第一电源端,用于向所述第一发光电路、所述第二发光电路和所述第三发光电路提供第一发光电压;第二电源端,用于向所述第一发光电路、所述第二
发光电路和所述第三发光电路提供第二发光电压;第三电源端,用于向所述第一复位电路和所述第二复位电路提供复位电压;第一数据信号端,用于向所述第一数据写入电路提供第一数据信号或待机信号;第二数据信号端,用于向所述第二数据写入电路提供第二数据信号或待机信号;第一控制端,用于提供控制所述第一复位电路、所述第二复位电路工作和关断的第一控制信号;第二控制端,用于提供控制所述第一数据写入电路、所述第一补偿电路、所述第二数据写入电路、所述第二补偿电路工作和关断的第二控制信号;第三控制端,用于提供控制所述第一初始化电路、第二初始化电路、第三初始化电路工作和关断的第三控制信号;以及第四控制端,用于提供控制所述第一发光电路、所述第二发光控制电路、所述第三发光控制电路工作和关断的第四控制信号。
例如,在本公开实施例提供的像素电路中,所述第一数据写入电路包括第一晶体管,所述第一发光控制电路包括第二晶体管和第五晶体管,所述第一补偿电路包括第三晶体管,所述第一驱动电路包括第四晶体管,所述第一复位电路包括第六晶体管,所述第一初始化电路包括第七晶体管,所述第一存储电路包括第一存储电容,所述第一发光电路包括第一有机发光二极管,所述第三发光控制电路包括第八晶体管和第十一晶体管,所述第三驱动电路包括第九晶体管和第十晶体管,所述第三初始化电路包括第十二晶体管,所述第二复位电路包括第十三晶体管,所述第二发光控制电路包括第十四晶体管和第十八晶体管,所述第二数据写入电路包括第十五晶体管,所述第二补偿电路包括第十六晶体管,所述第二驱动电路包括第十七晶体管,所述第二初始化电路包括第十九晶体管,所述第二存储电路包括第二存储电容,所述第二发光电路包括第二有机发光二极管,所述第三发光电路包括第三有机发光二极管。
例如,在本公开实施例提供的像素电路中,所述第一晶体管的源极与所述第一数据信号端电连接,所述第一晶体管的栅极、所述第三晶体管的栅极和所述第二控制端电连接,所述第一晶体管的漏极、所述第二晶体管的漏极、所述第三晶体管的源极和所述第四晶体管的源极电连接;所述第二晶体管的栅极、所述第五晶体管的栅极和所述第四控制端电连接,所述第二晶体管的源极、所述第一存储电容的第一端和所述第一电源端电连接;所述第三晶体
管的漏极和第一节点电连接;所述第四晶体管的栅极和所述第一节点电连接,所述第四晶体管的漏极和所述第五晶体管的源极电连接;所述第五晶体管的漏极、所述第七晶体管的漏极和所述第一有机发光二极管的第一端电连接;所述第六晶体管的源极、所述第七晶体管的源极和所述第三电源端电连接,所述第六晶体管的栅极和所述第一控制端电连接,第六晶体管的漏极和所述第一节点电连接;所述第七晶体管的栅极和所述第三控制端电连接;所述第一存储电容的第二端和所述第一节点电连接;所述第一有机发光二极管的第二端和所述第二电源端电连接;所述第八晶体管的源极和所述第一电源端电连接,所述第八晶体管的栅极和所述第四控制端电连接,所述第八晶体管的漏极和所述第九晶体管的源极电连接;所述第九晶体管的栅极和所述第一节点电连接,所述第九晶体管的漏极和所述第十晶体管的源极电连接;所述第十晶体管的栅极和第二节点电连接,所述第十晶体管的漏极和所述第十一晶体管的源极电连接;所述第十一晶体管的栅极和所述第四控制端电连接,所述第十一晶体管的漏极、所述第三有机发光二极管的第一端和所述第十二晶体管的漏极电连接;所述第十二晶体管的栅极和所述第三控制端电连接,所述第十二晶体管的源极、所述第十三晶体管的漏极、所述第十九晶体管的源极和所述第三电源端电连接;所述第十三晶体管的源极和所述第二节点电连接,所述第十三晶体管的栅极和所述第一控制端电连接;所述第十四晶体管的源极、所述第二存储电容的第一端和所述第一电源端电连接,所述第十四晶体管的栅极、所述第十八晶体管的栅极和所述第四控制端电连接,所述第十四晶体管的漏极、所述第十五晶体管的漏极、所述第十六晶体管的源极和所述第十七晶体管的源极电连接;所述第十五晶体管的源极和所述第二数据信号端电连接,所述第十五晶体管的栅极、所述第十六晶体管的栅极和所述第二控制端电连接;所述第十六晶体管的漏极和所述第二节点电连接;所述第十七晶体管的栅极和所述第二节点电连接,所述第十七晶体管的漏极和所述第十八晶体管的源极电连接;所述第十八晶体管的漏极、所述第十九晶体管的漏极和所述第二有机发光二极管的第一端电连接;所述第十九晶体管的栅极和所述第三控制端电连接;所述第二存储电容的第二端和所述第二节点电连接;所述第二有机发光二极管的第二端和所述第二电源端电连接;所述第三有机发光二极管的第二端和所述第二电源端电连接。
例如,在本公开实施例提供的像素电路中,所述第一晶体管、所述第二晶体管、所述第三晶体管、所述第四晶体管、所述第五晶体管、所述第六晶体管、所述第七晶体管、所述第八晶体管、所述第九晶体管、所述第十晶体管、所述第十一晶体管、所述第十二晶体管、所述第十三晶体管、所述第十四晶体管、所述第十五晶体管、所述第十六晶体管、所述第十七晶体管、所述第十八晶体管和所述第十九晶体管均为薄膜晶体管。
例如,在本公开实施例提供的像素电路中,所述第一晶体管、所述第二晶体管、所述第三晶体管、所述第四晶体管、所述第五晶体管、所述第六晶体管、所述第七晶体管、所述第八晶体管、所述第九晶体管、所述第十晶体管、所述第十一晶体管、所述第十二晶体管、所述第十三晶体管、所述第十四晶体管、所述第十五晶体管、所述第十六晶体管、所述第十七晶体管、所述第十八晶体管和所述第十九晶体管均为P型晶体管。
例如,在本公开实施例提供的像素电路中,第四晶体管的阈值电压等于第九晶体管的阈值电压,第十晶体管的阈值电压等于第十七晶体管的阈值电压。
例如,在本公开实施例提供的像素电路中,所述第一有机发光二极管在工作时发出第一颜色的光,所述第二有机发光二极管在工作时发出第二颜色的光,所述第三有机发光二极管在工作时发出第三颜色的光,所述第一颜色的光与所述第二颜色的光的混合色为所述第三颜色的光。
例如,在本公开实施例提供的像素电路中,所述第一颜色的光为红光,所述第二颜色的光为绿光,所述第三颜色的光为黄光。
本公开的实施例还提供一种像素电路,包括:第四发光电路,用于在工作时发光;第四驱动电路,用于驱动所述第四发光电路;第三补偿电路,用于补偿所述第四驱动电路;第三数据写入电路,用于向所述第四驱动电路写入数据;第三复位电路,用于将所述第四驱动电路复位;第三存储电路,用于存储所述第四驱动电路的驱动电压;第四初始化电路,用于将所述第四发光电路初始化;第四发光控制电路,用于控制所述第四发光电路的工作和关断;第一电源端,用于向所述第四发光电路提供第一发光电压;第二电源端,用于向所述第四发光电路提供第二发光电压;第三电源端,用于向所述第三复位电路提供复位电压;第三数据信号端,用于向所述第三数据写入电路提
供第三数据信号或待机信号;第一控制端,用于提供控制所述第三复位电路工作和关断的第一控制信号;第二控制端,用于提供控制所述第三数据写入电路和所述第三补偿电路工作和关断的第二控制信号;第三控制端,用于提供控制所述第四初始化电路工作和关断的第三控制信号;以及第四控制端,用于提供控制所述第四发光控制电路工作和关断的第四控制信号。
例如,在本公开实施例提供的像素电路中,所述第三数据写入电路包括第二十晶体管,所述第四发光控制电路包括第二十一晶体管和第二十四晶体管,所述第三补偿电路包括第二十二晶体管,所述第四驱动电路包括第二十三晶体管,所述第三复位电路包括第二十五晶体管,所述第四初始化电路包括第二十六晶体管,所述第三存储电路包括第三存储电容,所述第四发光电路包括第四有机发光二极管。
例如,在本公开实施例提供的像素电路中,所述第二十晶体管的源极与所述第三数据信号端电连接,所述第二十晶体管的栅极、所述第二十二晶体管的栅极和所述第二控制端电连接,所述第二十晶体管的漏极、所述第二十一晶体管的漏极、所述第二十二晶体管的源极和所述第二十三晶体管的源极电连接;所述第二十一晶体管的栅极、所述第二十四晶体管的栅极和所述第四控制端电连接,所述第二十一晶体管的源极、所述第三存储电容的第一端和所述第一电源端电连接;所述第二十二晶体管的漏极和第三节点电连接;所述第二十三晶体管的栅极和所述第三节点电连接,所述第二十三晶体管的漏极和所述第二十四晶体管的源极电连接;所述第二十四晶体管的漏极、所述第二十六晶体管的漏极和所述第四有机发光二极管的第一端电连接;所述第二十五晶体管的源极、所述第二十六晶体管的源极和所述第三电源端电连接,所述第二十五晶体管的栅极和所述第一控制端电连接,第二十五晶体管的漏极和所述第三节点电连接;所述第二十六晶体管的栅极和所述第三控制端电连接;所述第三存储电容的第二端和所述第三节点电连接;所述第四有机发光二极管的第二端和所述第二电源端电连接。
例如,在本公开实施例提供的像素电路中,所述第二十晶体管、所述第二十一晶体管、所述第二十二晶体管、所述第二十三晶体管、所述第二十四晶体管、所述第二十五晶体管以及所述第二十六晶体管均为薄膜晶体管。
例如,在本公开实施例提供的像素电路中,所述第二十晶体管、所述第
二十一晶体管、所述第二十二晶体管、所述第二十三晶体管、所述第二十四晶体管、所述第二十五晶体管以及所述第二十六晶体管均为P型晶体管。
本公开的实施例还提供一种显示面板,包括本公开任一实施例所述的像素电路。
例如,本公开实施例提供的显示面板,包括具有第一有机发光二极管、第二有机发光二极管和第三有机发光二极管的像素电路以及具有第四有机发光二极管的像素电路。
例如,在本公开实施例提供的显示面板中,第一有机发光二极管在工作时发出红光,第二有机发光二极管在工作时发出绿光,第三有机发光二极管在工作时发出黄光;第四有机发光二极管在工作时发出蓝光。
本公开的实施例还提供一种像素电路的驱动方法,包括:复位阶段、补偿阶段、初始化阶段和发光阶段,其中,在所述复位阶段,所述第一控制端输出有效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号;在所述补偿阶段,所述第一控制端输出无效信号,所述第二控制端输出有效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出第一数据信号,所述第二数据信号端输出待机信号;或者,所述第一数据信号端输出待机信号,所述第二数据信号端输出第二数据信号;或者,所述第一数据信号端输出第一数据信号,所述第二数据信号端输出第二数据信号;在所述初始化阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出有效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号;在所述发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出有效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号。
例如,本公开实施例提供的驱动方法,还包括:预复位阶段和预发光阶段,其中,预复位阶段在所述发光阶段之后和所述复位阶段之前,所述预发光阶段在所述初始化阶段之后和所述发光阶段之前,在所述预复位阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制
端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号;在所述预发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号。
例如,在本公开实施例提供的驱动方法中,在所述补偿阶段,当所述第一数据信号端输出第一数据信号,所述第二数据信号端输出待机信号时,所述第一发光电路单独发光,所述第一数据信号用于控制所述第一发光电路的发光亮度;当所述第一数据信号端输出待机信号,所述第二数据信号端输出第二数据信号时,所述第二发光电路单独发光,所述第二数据信号用于控制所述第二发光电路的发光亮度;当所述第一数据信号端输出第一数据信号,所述第二数据信号端输出第二数据信号时,所述第一发光电路、所述第二发光电路和所述第三发光电路同时发光,所述第一数据信号用于控制所述第一发光电路的发光亮度,所述第二数据信号用于控制所述第二发光电路的发光亮度,所述第一数据信号和所述第二数据信号中较小的数据信号用于控制所述第三发光电路的发光亮度。
本公开的实施例还提供一种像素电路的驱动方法,包括:复位阶段、补偿阶段、初始化阶段和发光阶段,其中,在所述复位阶段,所述第一控制端输出有效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号;在所述补偿阶段,所述第一控制端输出无效信号,所述第二控制端输出有效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出第三数据信号或待机信号;在所述初始化阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出有效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号;在所述发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出有效信号,所述第三数据信号端输出待机信号。
例如,本公开实施例提供的驱动方法,还包括:预复位阶段和预发光阶段,其中,预复位阶段在所述发光阶段之后和所述复位阶段之前,所述预发
光阶段在所述初始化阶段之后和所述发光阶段之前,在所述预复位阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号;在所述预发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号。
本公开的实施例还提供一种驱动方法,包括:复位阶段、补偿阶段、初始化阶段和发光阶段,其中,在所述复位阶段,所述第一控制端输出有效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号,所述第三数据信号端输出待机信号;在所述补偿阶段,所述第一控制端输出无效信号,所述第二控制端输出有效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出第一数据信号,所述第二数据信号端输出待机信号,所述第三数据信号端输出第三数据信号或待机信号;或者,所述第一数据信号端输出待机信号,所述第二数据信号端输出第二数据信号,所述第三数据信号端输出第三数据信号或待机信号;或者,所述第一数据信号端输出第一数据信号,所述第二数据信号端输出第二数据信号,所述第三数据信号端输出第三数据信号或待机信号;在所述初始化阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出有效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号,所述第三数据信号端输出待机信号;在所述发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出有效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号,所述第三数据信号端输出待机信号。
为了更清楚地说明本公开实施例的技术方案,下面将对实施例或相关技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅涉及本公开的一些实施例,并非对本公开的限制。
图1是本公开实施例提供的一种像素电路的示意图之一;
图2是本公开实施例提供的一种像素电路的示意图之二;
图3是本公开实施例提供的如图2所示的像素电路中第一有机发光二极管单独发光时的驱动时序图;
图4A是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在预复位阶段的导通状态示意图;
图4B是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在复位阶段的导通状态示意图;
图4C是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在补偿阶段的导通状态示意图;
图4D是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在初始化阶段的导通状态示意图;
图4E是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在预发光阶段的导通状态示意图;
图4F是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在发光阶段的导通状态示意图;
图5是本公开实施例提供的如图2所示的像素电路中第一有机发光二极管、第二有机发光二极管和第三有机发光二极管同时发光时的驱动时序图;
图6A是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在预复位阶段的导通状态示意图;
图6B是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在复位阶段的导通状态示意图;
图6C是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在补偿阶段的导通状态示意图;
图6D是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在初始化阶段的导通状态示意图;
图6E是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在预发光阶段的导通状态示意图;
图6F是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在发光阶段的导通状态示意图;
图7是本公开实施例提供的又一种像素电路的示意图之一;
图8是本公开实施例提供的又一种像素电路的示意图之二;
图9是本公开实施例提供的如图8所示的像素电路的驱动时序图;
图10A是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在预复位阶段的导通状态示意图;
图10B是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在复位阶段的导通状态示意图;
图10C是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在补偿阶段的导通状态示意图;
图10D是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在初始化阶段的导通状态示意图;
图10E是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在预发光阶段的导通状态示意图;
图10F是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在发光阶段的导通状态示意图;
图11是本公开实施例提供的一种显示面板的示意图;以及
图12是本公开实施例提供的一种驱动方法中第一有机发光二极管和第四有机发光二极管发光、第二有机发光二极管和第三有机发光二极管熄灭时驱动时序的示意图。
下面将结合附图,对本公开实施例中的技术方案进行清楚、完整地描述参考在附图中示出并在以下描述中详述的非限制性示例实施例,更加全面地说明本公开的示例实施例和它们的多种特征及有利细节。应注意的是,图中示出的特征不是必须按照比例绘制。本公开省略了已知材料、组件和工艺技术的描述,从而不使本公开的示例实施例模糊。所给出的示例仅旨在有利于理解本公开示例实施例的实施,以及进一步使本领域技术人员能够实施示例实施例。因而,这些示例不应被理解为对本公开的实施例的范围的限制。
除非另外特别定义,本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、
“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的组成部分。此外,在本公开各个实施例中,相同或类似的参考标号表示相同或类似的构件。
OLED显示面板一般包括多个像素单元,每个像素单元中包括多个能发出不同颜色光的OLED的子像素,每个OLED可由各自的像素电路驱动,然而像素电路占用的面积较大,影响了显示面板的分辨率。
本公开的实施例提供了一种像素电路、显示面板及驱动方法,可以减小像素电路占用的面积,提高显示面板的分辨率,并可以对有机发光二极管进行初始化放电,保证了低灰阶的准确性及全暗态画面下的全黑,有效改善整个显示面板的对比度。
例如,图1是本公开实施例提供的一种像素电路的示意图之一。如图1所示,本公开的实施例提供一种像素电路100,包括:第一发光电路102,用于在工作时发光;第一驱动电路104,用于驱动第一发光电路102;第一补偿电路106,用于补偿第一驱动电路104;第一数据写入电路108,用于向第一驱动电路104写入数据;第一复位电路110,用于将第一驱动电路104复位;第一存储电路112,用于存储第一驱动电路104的驱动电压;第一初始化电路114,用于将第一发光电路102初始化;第一发光控制电路116,用于控制第一发光电路102的工作和关断,例如,第一发光控制电路116包括第一部分116A和第二部分116B;第二发光电路118,用于在工作时发光;第二驱动电路120,用于驱动第二发光电路118;第二补偿电路122,用于补偿第二驱动电路120;第二数据写入电路124,用于向第二驱动电路120写入数据;第二复位电路126,用于将第二驱动电路120复位;第二存储电路128,用于存储第二驱动电路120的驱动电压;第二初始化电路130,用于将第二发光电路118初始化;第二发光控制电路132,用于控制第二发光电路118的工作和关断,例如,第二发光控制电路132包括第一部分132A和第二部分132B;第三发光电路134,用于在工作时发光;第三发光控制电路136,用于控制第三发光电路134的工作和关断,例如,第三发光控制电路136包括第一部分136A和第二部分136B;第三驱动电路138,用于驱动第三发光电路134,例如,第三驱动电路138包括第一部分138A和第二部分138B;第三初始化电路140,用于将第三发光电路134初始化;第一电源端ELVDD,
用于向第一发光电路102、第二发光电路118和第三发光电路134提供第一发光电压Velvdd;第二电源端ELVSS,用于向第一发光电路102、第二发光电路118和第三发光电路134提供第二发光电压Velvss;第三电源端Vx,用于向第一复位电路110和第二复位电路126提供复位电压Vvx;第一数据信号端Data1,用于向第一数据写入电路108提供第一数据信号或待机信号;第二数据信号端Data2,用于向第二数据写入电路124提供第二数据信号或待机信号;第一控制端Sn-1,用于提供控制第一复位电路110、第二复位电路126工作和关断的第一控制信号;第二控制端Sn,用于提供控制第一数据写入电路108、第一补偿电路106、第二数据写入电路124、第二补偿电路122工作和关断的第二控制信号;第三控制端Sn+1,用于提供控制第一初始化电路114、第二初始化电路130、第三初始化电路140工作和关断的第三控制信号;以及第四控制端En,用于提供控制第一发光电路102、第二发光控制电路132、第三发光控制电路136工作和关断的第四控制信号。
例如,图2是本公开实施例提供的一种像素电路的示意图之二,图2是图1中所示像素电路的一种具体实施方式。如图1和图2所示,在本公开实施例提供的像素电路100中,第一数据写入电路108包括第一晶体管T1;第一发光控制电路116包括第二晶体管T2和第五晶体管T5,例如,第一发光控制电路116的第一部分116A包括第二晶体管T2,第一发光控制电路116的第二部分116B包括第五晶体管T5;第一补偿电路106包括第三晶体管T3;第一驱动电路104包括第四晶体管T4;第一复位电路110包括第六晶体管T6;第一初始化电路114包括第七晶体管T7;第一存储电路112包括第一存储电容C1;第一发光电路102包括第一有机发光二极管OLED1;第三发光控制电路136包括第八晶体管T8和第十一晶体管T11,例如,第三发光控制电路136的第一部分136A包括第八晶体管T8,第三发光控制电路136的第二部分136B包括第十一晶体管T11;第三驱动电路138包括第九晶体管T9和第十晶体管T10,例如,第三驱动电路138的第一部分138A包括第九晶体管T9,第三驱动电路138的第二部分138B包括第十晶体管T10;第三初始化电路140包括第十二晶体管T12;第二复位电路126包括第十三晶体管T13;第二发光控制电路132包括第十四晶体管T14和第十八晶体管T18,例如,第二发光控制电路132的第一部分132A包括第十四晶体管T14,第
二发光控制电路132的第二部分132B包括第十八晶体管T18;第二数据写入电路124包括第十五晶体管T15;第二补偿电路122包括第十六晶体管T16;第二驱动电路120包括第十七晶体管T17;第二初始化电路130包括第十九晶体管T19;第二存储电路128包括第二存储电容C2;第二发光电路118包括第二有机发光二极管OLED2;第三发光电路134包括第三有机发光二极管OLED3。
例如,如图2所示,第三晶体管T3包括第一子晶体管和第二子晶体管,第一子晶体管的源极作为第三晶体管T3的源极,第一子晶体管的漏极与第二子晶体管的源极电连接,第二子晶体管的漏极作为第三晶体管T3的漏极,第一子晶体管的栅极和第二子晶体管的栅极电连接共同作为第三晶体管T3的栅极。第十六晶体管T16包括第三子晶体管和第四子晶体管,第三子晶体管的源极作为第十六晶体管T16的源极,第三子晶体管的漏极与第四子晶体管的源极电连接,第四子晶体管的漏极作为第十六晶体管T16的漏极,第三子晶体管的栅极和第四子晶体管的栅极电连接共同作为第十六晶体管T16的栅极。第三晶体管T3和第十六晶体管T16的这种组成方式可以使第一子晶体管和第二子晶体管中的至少一个处于饱和区,第三子晶体管和第四子晶体管中的至少一个处于饱和区。需要说明的是,本公开的实施例包括但不仅限于第三晶体管T3和第十六晶体管T16的这种组成方式,第三晶体管T3可以仅包括一个晶体管,第十六晶体管T16也可以仅包括一个晶体管。本公开实施例中的其它晶体管也可以根据实际需要参照第三晶体管T3或第十六晶体管T16的这种组成方式设置,类似的变换均处于本公开的保护范围之内。
例如,如图2所示,在本公开实施例提供的像素电路100中,第一晶体管T1的源极与第一数据信号端Data1电连接,第一晶体管T1的栅极、第三晶体管T3的栅极和第二控制端Sn电连接,第一晶体管T1的漏极、第二晶体管T2的漏极、第三晶体管T3的源极和第四晶体管T4的源极电连接;第二晶体管T2的栅极、第五晶体管T5的栅极和第四控制端En电连接,第二晶体管T2的源极、第一存储电容C1的第一端和第一电源端ELVDD电连接;第三晶体管T3的漏极和第一节点N1电连接;第四晶体管T4的栅极和第一节点N1电连接,第四晶体管T4的漏极和第五晶体管T5的源极电连接;第五晶体管T5的漏极、第七晶体管T7的漏极和第一有机发光二极管OLED1
的第一端电连接;第六晶体管T6的源极、第七晶体管T7的源极和第三电源端Vx电连接,第六晶体管T6的栅极和第一控制端Sn-1电连接,第六晶体管T6的漏极和第一节点N1电连接;第七晶体管T7的栅极和第三控制端Sn+1电连接;第一存储电容C1的第二端和第一节点N1电连接;第一有机发光二极管OLED1的第二端和第二电源端ELVSS电连接;第八晶体管T8的源极和第一电源端ELVDD电连接,第八晶体管T8的栅极和第四控制端En电连接,第八晶体管T8的漏极和第九晶体管T9的源极电连接;第九晶体管T9的栅极和第一节点N1电连接,第九晶体管T9的漏极和第十晶体管T10的源极电连接;第十晶体管T10的栅极和第二节点N2电连接,第十晶体管T10的漏极和第十一晶体管T11的源极电连接;第十一晶体管T11的栅极和第四控制端En电连接,第十一晶体管T11的漏极、第三有机发光二极管OLED3的第一端和第十二晶体管T12的漏极电连接;第十二晶体管T12的栅极和第三控制端Sn+1电连接,第十二晶体管T12的源极、第十三晶体管T13的漏极、第十九晶体管T19的源极和第三电源端Vx电连接;第十三晶体管T13的源极和第二节点N2电连接,第十三晶体管T13的栅极和第一控制端Sn-1电连接;第十四晶体管T14的源极、第二存储电容C2的第一端和第一电源端ELVDD电连接,第十四晶体管T14的栅极、第十八晶体管T18的栅极和第四控制端En电连接,第十四晶体管T14的漏极、第十五晶体管T15的漏极、第十六晶体管T16的源极和第十七晶体管T17的源极电连接;第十五晶体管T15的源极和第二数据信号端Data2电连接,第十五晶体管T15的栅极、第十六晶体管T16的栅极和第二控制端Sn电连接;第十六晶体管T16的漏极和第二节点N2电连接;第十七晶体管T17的栅极和第二节点N2电连接,第十七晶体管T17的漏极和第十八晶体管T18的源极电连接;第十八晶体管T18的漏极、第十九晶体管T19的漏极和第二有机发光二极管OLED2的第一端电连接;第十九晶体管T19的栅极和第三控制端Sn+1电连接;第二存储电容C2的第二端和第二节点N2电连接;第二有机发光二极管OLED2的第二端和第二电源端ELVSS电连接;第三有机发光二极管OLED3的第二端和第二电源端ELVSS电连接。
例如,在本公开实施例提供的像素电路中,第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5、第六晶体管T6、第
七晶体管T7、第八晶体管T8、第九晶体管T9、第十晶体管T10、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十七晶体管T17、第十八晶体管T18和第十九晶体管T19均为薄膜晶体管。
例如,在本公开实施例提供的像素电路中,第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第九晶体管T9、第十晶体管T10、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十七晶体管T17、第十八晶体管T18和第十九晶体管T19均为P型晶体管。
需要说明的是,本公开的实施例中采用的晶体管均可以为薄膜晶体管或场效应晶体管或其他特性相同的开关器件。这里采用的晶体管的源极、漏极在结构上可以是对称的,所以其源极、漏极在结构上可以是没有区别的。在本公开的实施例中,为了区分晶体管除栅极之外的两极,直接描述了其中一极为源极,另一极为漏极,所以本公开实施例中全部或部分晶体管的源极和漏极根据需要是可以互换的。此外,按照晶体管的特性区分可以将晶体管分为N型和P型晶体管,本公开的实施例均以P型晶体管为例进行说明。基于本公开对P型晶体管实现方式的描述和教导,本领域普通技术人员在没有做出创造性劳动前提下能够容易想到本公开实施例采用N型晶体管的实现方式,因此,这些实现方式也是在本公开的保护范围内的。
例如,在本公开实施例提供的像素电路100中,第一有机发光二极管OLED1在工作时发出第一颜色的光,第二有机发光二极管OLED2在工作时发出第二颜色的光,第三有机发光二极管OLED3在工作时发出第三颜色的光,第一颜色的光与第二颜色的光的混合色为第三颜色。
例如,在本公开实施例提供的像素电路100的一个示例中,第一颜色的光为红光,第二颜色的光为绿光,第三颜色的光为黄光。红色和绿色的混合色为黄色。
例如,像素电路100同时控制第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二极管OLED3,由此整体上节省了像素电路的数量,进而减小了像素电路占用的面积,提高了显示面板的分辨率。
例如,在像素电路100工作时,可以是第一有机发光二极管OLED1和第二有机发光二极管OLED2单独发光,也可以是第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二极管OLED3同时发光。
例如,根据显示画面的不同,可以借用第三有机发光二极管OLED3的亮度取代第一有机发光二极管OLED1和第二有机发光二极管OLED2的组合亮度,在需要第三有机发光二极管OLED3发光的显示画面中,会出现第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二极管OLED3同时发光,相当于增大了第一有机发光二极管OLED1和第二有机发光二极管OLED2发光材料的面积,减小了第一有机发光二极管OLED1和第二有机发光二极管OLED2发光的亮度,由此可以减缓第一有机发光二极管OLED1和第二有机发光二极管OLED2中有机功能材料的老化,增加第一有机发光二极管OLED1和第二有机发光二极管OLED2的使用寿命。
例如,在本公开实施例提供的像素电路100中,第四晶体管T4的阈值电压等于第九晶体管T9的阈值电压,第十晶体管T10的阈值电压等于第十七晶体管T17的阈值电压。这样,当第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二极管OLED3同时发光时,第三有机发光二极管OLED3发光的亮度与第一有机发光二极管OLED1和第二有机发光二极管OLED2中发光较暗的亮度相同。
本公开的实施例还提供一种如图2所示像素电路的驱动方法,该驱动方法包括:复位阶段、补偿阶段、初始化阶段和发光阶段。在复位阶段,第一控制端Sn-1输出有效信号,第二控制端Sn输出无效信号,第三控制端Sn+1输出无效信号,第四控制端En输出无效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号;在补偿阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出有效信号,第三控制端Sn+1输出无效信号,第四控制端En输出无效信号,第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出待机信号;或者,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出第二数据信号;或者,第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出第二数据信号;在初始化阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出无效信号,
第三控制端Sn+1输出有效信号,第四控制端En输出无效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号;在发光阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出无效信号,第三控制端Sn+1输出无效信号,第四控制端En输出有效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号。
例如,本公开实施例提供的驱动方法,还可以包括:预复位阶段和预发光阶段,预复位阶段在发光阶段之后和复位阶段之前,预发光阶段在初始化阶段之后和发光阶段之前,在预复位阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出无效信号,第三控制端Sn+1输出无效信号,第四控制端En输出无效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号;在预发光阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出无效信号,第三控制端Sn+1输出无效信号,第四控制端En输出无效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号。
例如,在本公开实施例提供的驱动方法中,在补偿阶段,当第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出待机信号时,第一发光电路102单独发光,第一数据信号用于控制第一发光电路102的发光亮度;当第一数据信号端Data1输出待机信号,第二数据信号端Data2输出第二数据信号时,第二发光电路118单独发光,第二数据信号用于控制第二发光电路118的发光亮度;当第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出第二数据信号时,第一发光电路102、第二发光电路118和第三发光电路134同时发光,第一数据信号用于控制第一发光电路102的发光亮度,第二数据信号用于控制第二发光电路118的发光亮度,第一数据信号和第二数据信号中较小的数据信号用于控制第三发光电路134的发光亮度。
需要说明的是,本公开实施例中所述的有效信号是指能使相应电路或晶体管开启的信号,无效信号是指能使相应电路或晶体管关闭的信号,第一数据信号、第二数据信号是指包含着相应发光电路或有机发光二极管发光亮度信息的信号(例如低电平信号),待机信号是指能使相应发光电路或有机发光二极管不发光的信号(例如高电平信号)。例如,当晶体管为P型晶体管
时,有效信号是指低电平信号,无效信号是指高电平信号,低电平信号和高电平信号的具体电压值可根据晶体管的属性进行相应设置。以下,本公开的实施例以晶体管均为P型晶体管为例进行说明。
例如,图3是本公开实施例提供的如图2所示的像素电路中第一有机发光二极管单独发光时的驱动时序图。如图3所示,本公开的实施例提供一种如图2所示像素电路的驱动方法包括:预复位阶段t1、复位阶段t2、补偿阶段t3、初始化阶段t4、预发光阶段t5和发光阶段t6。
例如,在预复位阶段t1,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
例如,图4A是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在预复位阶段t1的导通状态示意图。在预复位阶段t1,第一晶体管T1、第二晶体管T2、第三晶体管T3、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十八晶体管T18和第十九晶体管T19均处于关闭状态,像素电路中没有形成通路;第四晶体管T4、第九晶体管T9、第十晶体管T10和第十七晶体管T17的导通状态与第一节点N1和第二节点N2的电压有关。例如,预复位阶段可以给像素电路提供一个稳定的时间,使各电路元件的电压和电流状态稳定,防止电路异常情况发生。
例如,在复位阶段t2,第一控制端Sn-1输出低电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图4B是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在复位阶段t2的导通状态示意图。在复位阶段t2,第一晶体管T1、第二晶体管T2、第三晶体管T3、第五晶体管T5、第七晶体管T7、第八晶体管T8、第十一晶体管T11、第十二晶体管T12、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十八晶体管T18和第十九晶体管
T19均处于关闭状态;由于第一控制端Sn-1输出低电平信号,第六晶体管T6和第十三晶体管T13导通,第一节点N1和第二节点N2的电压为第三电源端Vx提供的复位电压Vvx,复位电压Vvx例如为能使P型晶体管开启的低电平电压,又例如,复位电压Vvx为负电压;此时,由于第一节点N1和第二节点N2的电压为低电平的复位电压Vvx,第四晶体管T4、第九晶体管T9、第十晶体管T10和第十七晶体管T17开启但不会形成通路。这样就实现了通过第六晶体管T6将第四晶体管T4和第九晶体管T9复位,通过第十三晶体管T13将第十晶体管T10和第十七晶体管T17复位,即第一复位电路将第一驱动电路复位,第二复位电路将第二驱动电路复位,第一复位电路和第二复位电路共同将第三驱动电路复位。例如,经过复位阶段可以增加第一节点N1和第一数据信号Vdata1之间的电压差,减小了在补偿阶段t3中,对第一存储电容C1的充电时间。
例如,在补偿阶段t3,第一控制端Sn-1输出高电平信号,第二控制端Sn输出低电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出第一数据信号Vdata1(例如低电平信号),第二数据信号端Data2输出高电平信号。
图4C是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在补偿阶段t3的导通状态示意图。在补偿阶段t3,第二晶体管T2、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第十晶体管T10、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十七晶体管T17、第十八晶体管T18和第十九晶体管T19均处于关闭状态;由于第二控制端Sn输出低电平信号,第一晶体管T1、第三晶体管T3、第十五晶体管T15和第十六晶体管T16导通,第一数据信号端Data1输出的第一数据信号Vdata1通过第一晶体管T1和第三晶体管T3传输到第一节点N1,对第一存储电容C1充电完成后,第一节点N1的电压为Vdata1+Vth1(Vth1为第一晶体管T1和第三晶体管T3的总压降),也就是说第一数据写入电路向第一驱动电路写入了数据,第一补偿电路对第一驱动电路进行了补偿,此时,第四晶体管T4和第九晶体管T9开启但不会形成通路;第二数据信号端Data2输出的高电平信号通过第十五晶体管T15和第十六晶体管T16传输到第二节点N2,第二节点N2的电压为高电平,所以第
十晶体管T10和第十七晶体管T17处于关闭状态。
例如,在初始化阶段t4,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出低电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
例如,对有机发光二极管进行初始化放电,保证了低灰阶的准确性及全暗态画面下的全黑,可以有效改善整个显示面板的对比度。
图4D是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在初始化阶段t4的导通状态示意图。在初始化阶段t4,第一晶体管T1、第二晶体管T2、第三晶体管T3、第五晶体管T5、第六晶体管T6、第八晶体管T8、第十晶体管T10、第十一晶体管T11、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十七晶体管T17和第十八晶体管T18均处于关闭状态;由于第一存储电容C1存储电压的作用,第四晶体管T4和第九晶体管T9保持和补偿阶段t3一样的开启状态;由于第三控制端Sn+1输出低电平信号,第七晶体管T7、第十二晶体管T12和第十九晶体管T19导通,第三电源端Vx提供的复位电压Vvx通过第七晶体管T7传输给第一有机发光二极管OLED1的第一极(第一极例如为阳极),第三电源端Vx提供的复位电压Vvx通过第十二晶体管T12传输给第三有机发光二极管OLED2的第一极(第一极例如为阳极),第三电源端Vx提供的复位电压Vvx通过第十九晶体管T19传输给第二有机发光二极管OLED2的第一极(第一极例如为阳极),即第一初始化电路将第一发光电路初始化,第二初始化电路将第二发光电路初始化,第三初始化电路将第三发光电路初始化。例如,复位电压Vvx小于或等于第二电源端ELVSS提供的第二发光电压Velvss,这样,经过初始化可以防止OLED的异常发光,例如可以防止OLED在非发光阶段的微亮发光。
例如,在预发光阶段t5,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图4E是本公开实施例提供的如图2所示的像素电路被如图3所示的驱
动时序驱动时在预发光阶段t5的导通状态示意图。在预发光阶段t5,第一晶体管T1、第二晶体管T2、第三晶体管T3、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第十晶体管T10、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十七晶体管T17、第十八晶体管T18和第十九晶体管T19均处于关闭状态,像素电路中没有形成通路;由于第一存储电容C1存储电压的作用,第四晶体管T4和第九晶体管T9保持和初始化阶段t4一样的开启状态。例如,预发光阶段可以给像素电路提供一个稳定的时间,使各电路元件的电压和电流状态稳定,防止电路异常情况发生。
例如,在发光阶段t6,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出低电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图4F是本公开实施例提供的如图2所示的像素电路被如图3所示的驱动时序驱动时在发光阶段t6的导通状态示意图。在发光阶段t6,第一晶体管T1、第三晶体管T3、第六晶体管T6、第七晶体管T7、第十晶体管T10、第十二晶体管T12、第十三晶体管T13、第十五晶体管T15、第十六晶体管T16、第十七晶体管T17和第十九晶体管T19均处于关闭状态;由于第一存储电容C1存储电压的作用,第四晶体管T4和第九晶体管T9保持和预发光阶段t5一样的开启状态;由于第四控制端En输出低电平信号,第二晶体管T2、第五晶体管T5、第八晶体管T8、第十一晶体管T11、第十四晶体管T14和第十八晶体管T18处于开启状态,第一电源端ELVDD、第二晶体管T2、第四晶体管T4、第五晶体管T5、第一有机发光二极管OLED1和第二电源端ELVSS形成通路,第一有机发光二极管OLED1在第一电源端ELVDD提供的第一发光电压Velvdd和第二电源端ELVSS提供的第二发光电压Velvss的作用下,并在第四晶体管T4的驱动下发光,即第一发光控制电路控制第一发光电路的工作,第一电源端向第一发光电路提供第一发光电压,第二电源端向第一发光电路提供第二发光电压,第一驱动电路驱动第一发光电路,第一发光电路在工作时发光。
需要说明的是,如图2所示像素电路的驱动方法可以仅包括复位阶段t2、
补偿阶段t3、初始化阶段t4和发光阶段t6,而不包括预复位阶段t1和预发光阶段t5,或者包括预复位阶段t1和预发光阶段t5中的一个,在此不做限定。
例如,第二有机发光二极管单独发光时的情形与上文所述第一有机发光二极管单独发光时的情形类似,在此不再赘述。
图5是本公开实施例提供的如图2所示的像素电路中第一有机发光二极管、第二有机发光二极管和第三有机发光二极管同时发光时的驱动时序图。如图5所示,本公开的实施例提供一种如图2所示像素电路的驱动方法包括:预复位阶段t1、复位阶段t2、补偿阶段t3、初始化阶段t4、预发光阶段t5和发光阶段t6。
例如,在预复位阶段t1,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图6A是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在预复位阶段的导通状态示意图。在预复位阶段t1,第一晶体管T1、第二晶体管T2、第三晶体管T3、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十八晶体管T18和第十九晶体管T19均处于关闭状态,像素电路中没有形成通路;第四晶体管T4、第九晶体管T9、第十晶体管T10和第十七晶体管T17的导通状态与第一节点N1和第二节点N2的电压有关。例如,预复位阶段可以给像素电路提供一个稳定的时间,使各电路元件的电压和电流状态稳定,防止电路异常情况发生。
例如,在复位阶段t2,第一控制端Sn-1输出低电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图6B是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在复位阶段的导通状态示意图。在复位阶段t2,第一晶体管T1、
第二晶体管T2、第三晶体管T3、第五晶体管T5、第七晶体管T7、第八晶体管T8、第十一晶体管T11、第十二晶体管T12、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十八晶体管T18和第十九晶体管T19均处于关闭状态;由于第一控制端Sn-1输出低电平信号,第六晶体管T6和第十三晶体管T13导通,第一节点N1和第二节点N2的电压为第三电源端Vx提供的复位电压Vvx,复位电压Vvx例如为能使P型晶体管开启的低电平电压,又例如,复位电压Vvx为负电压;此时,由于第一节点N1和第二节点N2的电压为低电平的复位电压Vvx,第四晶体管T4、第九晶体管T9、第十晶体管T10和第十七晶体管T17开启但不会形成通路。这样就实现了通过第六晶体管T6将第四晶体管T4和第九晶体管T9复位,通过第十三晶体管T13将第十晶体管T10和第十七晶体管T17复位,即第一复位电路将第一驱动电路复位,第二复位电路将第二驱动电路复位,第一复位电路和第二复位电路共同将第三驱动电路复位。例如,经过复位阶段可以增加第一节点N1和第一数据信号Vdata1之间的电压差、增加第二节点N2和第二数据信号Vdata2之间的电压差,进而减小了在补偿阶段t3中,对第一存储电容C1和第二存储电容C2的充电时间。
例如,在补偿阶段t3,第一控制端Sn-1输出高电平信号,第二控制端Sn输出低电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出第一数据信号Vdata1(例如低电平信号),第二数据信号端Data2输出第二数据信号Vdata2(例如低电平信号)。
图6C是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在补偿阶段的导通状态示意图。在补偿阶段t3,第二晶体管T2、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第十晶体管T10、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十七晶体管T17、第十八晶体管T18和第十九晶体管T19均处于关闭状态;由于第二控制端Sn输出低电平信号,第一晶体管T1、第三晶体管T3、第十五晶体管T15和第十六晶体管T16导通,第一数据信号端Data1输出的第一数据信号Vdata1通过第一晶体管T1和第三晶体管T3传输到第一节点N1,对第一存储电容C1充电完成后,第一节点N1的电压为
Vdata1+Vth1(Vth1为第一晶体管T1和第三晶体管T3的总压降),也就是说第一数据写入电路向第一驱动电路写入了数据,第一补偿电路对第一驱动电路进行了补偿,此时,第四晶体管T4和第九晶体管T9开启但不会形成通路;第二数据信号端Data2输出的第二数据信号Vdata2通过第十五晶体管T15和第十六晶体管T16传输到第二节点N2,对第二存储电容C2充电完成后,第二节点N2的电压为Vdata2+Vth2(Vth2为第十五晶体管T15和第十六晶体管T16的总压降),也就是说第二数据写入电路向第二驱动电路写入了数据,第二补偿电路对第二驱动电路进行了补偿,此时,第十晶体管T10和第十七晶体管T17开启但不会形成通路。
例如,在初始化阶段t4,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出低电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图6D是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在初始化阶段的导通状态示意图。在初始化阶段t4,第一晶体管T1、第二晶体管T2、第三晶体管T3、第五晶体管T5、第六晶体管T6、第八晶体管T8、第十晶体管T10、第十一晶体管T11、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十七晶体管T17和第十八晶体管T18均处于关闭状态;由于第一存储电容C1存储电压的作用,第四晶体管T4和第九晶体管T9保持和补偿阶段t3一样的开启状态,由于第二存储电容C2存储电压的作用,第十晶体管T10和第十七晶体管T17保持和补偿阶段t3一样的开启状态;由于第三控制端Sn+1输出低电平信号,第七晶体管T7、第十二晶体管T12和第十九晶体管T19导通,第三电源端Vx提供的复位电压Vvx通过第七晶体管T7传输给第一有机发光二极管OLED1的第一极(第一极例如为阳极),第三电源端Vx提供的复位电压Vvx通过第十二晶体管T12传输给第三有机发光二极管OLED2的第一极(第一极例如为阳极),第三电源端Vx提供的复位电压Vvx通过第十九晶体管T19传输给第二有机发光二极管OLED2的第一极(第一极例如为阳极),即第一初始化电路将第一发光电路初始化,第二初始化电路将第二发光电路初始化,第三初始化电路将第三发光电路初始化。例如,复位电压Vvx小于
或等于第二电源端ELVSS提供的第二发光电压Velvss,这样,经过初始化可以防止OLED的异常发光,例如可以防止OLED在非发光阶段的微亮发光。
例如,在预发光阶段t5,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图6E是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在预发光阶段的导通状态示意图。在预发光阶段t5,第一晶体管T1、第二晶体管T2、第三晶体管T3、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第十一晶体管T11、第十二晶体管T12、第十三晶体管T13、第十四晶体管T14、第十五晶体管T15、第十六晶体管T16、第十八晶体管T18和第十九晶体管T19均处于关闭状态,像素电路中没有形成通路;由于第一存储电容C1存储电压的作用,第四晶体管T4和第九晶体管T9保持和初始化阶段t4一样的开启状态,由于第二存储电容C2存储电压的作用,第十晶体管T10和第十七晶体管T17保持和补偿阶段t4一样的开启状态。例如,预发光阶段可以给像素电路提供一个稳定的时间,使各电路元件的电压和电流状态稳定,防止电路异常情况发生。
例如,在发光阶段t6,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出低电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号。
图6F是本公开实施例提供的如图2所示的像素电路被如图5所示的驱动时序驱动时在发光阶段的导通状态示意图。在发光阶段t6,第一晶体管T1、第三晶体管T3、第六晶体管T6、第七晶体管T7、第十二晶体管T12、第十三晶体管T13、第十五晶体管T15、第十六晶体管T16和第十九晶体管T19均处于关闭状态;由于第一存储电容C1存储电压的作用,第四晶体管T4和第九晶体管T9保持和预发光阶段t5一样的开启状态,由于第二存储电容C2存储电压的作用,第十晶体管T10和第十七晶体管T17保持和补偿阶段t5一样的开启状态;由于第四控制端En输出低电平信号,第二晶体管T2、第五晶体管T5、第八晶体管T8、第十一晶体管T11、第十四晶体管T14和第
十八晶体管T18处于开启状态。第一电源端ELVDD、第二晶体管T2、第四晶体管T4、第五晶体管T5、第一有机发光二极管OLED1和第二电源端ELVSS形成通路;第一电源端ELVDD、第八晶体管T8、第九晶体管T9、第十晶体管T10、第十一晶体管T11、第三有机发光二极管OLED3和第二电源端ELVSS形成通路;第一电源端ELVDD、第十四晶体管T14、第十七晶体管T17、第十八晶体管T18、第二有机发光二极管OLED2和第二电源端ELVSS形成通路。第一有机发光二极管OLED1在第一电源端ELVDD提供的第一发光电压Velvdd和第二电源端ELVSS提供的第二发光电压Velvss的作用下,并在第四晶体管T4的驱动下发光;第二有机发光二极管OLED2在第一电源端ELVDD提供的第一发光电压Velvdd和第二电源端ELVSS提供的第二发光电压Velvss的作用下,并在第十七晶体管T17的驱动下发光;第三有机发光二极管OLED3在第一电源端ELVDD提供的第一发光电压Velvdd和第二电源端ELVSS提供的第二发光电压Velvss的作用下,并在第九晶体管T9和第十晶体管T10的驱动下发光;即第一发光控制电路控制第一发光电路的工作,第二发光控制电路控制第二发光电路工作,第三发光控制电路控制第三发光电路工作,第一电源端向第一发光电路、第二发光电路和第三发光电路提供第一发光电压,第二电源端向第一发光电路、第二发光电路和第三发光电路提供第二发光电压,第一驱动电路驱动第一发光电路,第二驱动电路驱动第二发光电路,第三驱动电路驱动第三发光电路,第一发光电路、第二发光电路和第三发光电路在工作时发光。
例如,图7是本公开实施例提供的又一种像素电路的示意图之一。如图7所示,本公开的实施例还提供一种像素电路200,包括:第四发光电路202,用于在工作时发光;第四驱动电路204,用于驱动第四发光电路202;第三补偿电路206,用于补偿第四驱动电路204;第三数据写入电路208,用于向第四驱动电路204写入数据;第三复位电路210,用于将第四驱动电路204复位;第三存储电路212,用于存储第四驱动电路204的驱动电压;第四初始化电路214,用于将第四发光电路202初始化;第四发光控制电路216,用于控制第四发光电路202的工作和关断;第一电源端ELVDD,用于向第四发光电路202提供第一发光电压Velvdd;第二电源端ELVSS,用于向第四发光电路202提供第二发光电压Velvss;第三电源端Vx,用于向第三复位电路
210提供复位电压Vvx;第三数据信号端Data3,用于向第三数据写入电路208提供第三数据信号或待机信号;第一控制端Sn-1,用于提供控制第三复位电路210工作和关断的第一控制信号;第二控制端Sn,用于提供控制第三数据写入电路208和第三补偿电路206工作和关断的第二控制信号;第三控制端Sn+1,用于提供控制第四初始化电路214工作和关断的第三控制信号;以及第四控制端En,用于提供控制第四发光控制电路216工作和关断的第四控制信号。
例如,图8是本公开实施例提供的又一种像素电路的示意图之二,图8是图7中所示像素电路的一种具体实施方式。如图7和图8所示,在本公开实施例提供的像素电路200中,第三数据写入电路208包括第二十晶体管T20,第四发光控制电路216包括第二十一晶体管T21和第二十四晶体管T24,第三补偿电路206包括第二十二晶体管T22,第四驱动电路204包括第二十三晶体管T23,第三复位电路210包括第二十五晶体管T25,第四初始化电路214包括第二十六晶体管T26,第三存储电路212包括第三存储电容C3,第四发光电路202包括第四有机发光二极管OLED4。
例如,如图8所示,第二十二晶体管T22包括第五子晶体管和第六子晶体管,第五子晶体管的源极作为第二十二晶体管T22的源极,第五子晶体管的漏极与第六子晶体管的源极电连接,第六子晶体管的漏极作为第二十二晶体管T22的漏极,第五子晶体管的栅极和第六子晶体管的栅极电连接共同作为第二十二晶体管T22的栅极。需要说明的是,本公开的实施例包括但不仅限于第二十二晶体管T22的这种组成方式,第二十二晶体管T22也可以仅包括一个晶体管。
例如,如图8所示,在本公开实施例提供的像素电路200中,第二十晶体管T20的源极与第三数据信号端Data3电连接,第二十晶体管T20的栅极、第二十二晶体管T22的栅极和第二控制端Sn电连接,第二十晶体管T20的漏极、第二十一晶体管T21的漏极、第二十二晶体管T22的源极和第二十三晶体管T23的源极电连接;第二十一晶体管T21的栅极、第二十四晶体管T24的栅极和第四控制端En电连接,第二十一晶体管T21的源极、第三存储电容C3的第一端和第一电源端ELVDD电连接;第二十二晶体管T22的漏极和第三节点N3电连接;第二十三晶体管T23的栅极和第三节点N3电
连接,第二十三晶体管T23的漏极和第二十四晶体管T24的源极电连接;第二十四晶体管T24的漏极、第二十六晶体管T26的漏极和第四有机发光二极管OLED4的第一端电连接;第二十五晶体管T25的源极、第二十六晶体管T26的源极和第三电源端Vx电连接,第二十五晶体管T25的栅极和第一控制端Sn-1电连接,第二十五晶体管T25的漏极和第三节点N3电连接;第二十六晶体管T26的栅极和第三控制端Sn+1电连接;第三存储电容C3的第二端和第三节点N3电连接;第四有机发光二极管OLED4的第二端和第二电源端ELVSS电连接。
例如,在本公开实施例提供的像素电路200中,第二十晶体管T20、第二十一晶体管T21、第二十二晶体管T22、第二十三晶体管T23、第二十四晶体管T24、第二十五晶体管T25以及第二十六晶体管T26均为薄膜晶体管。
例如,在本公开实施例提供的像素电路200中,第二十晶体管T20、第二十一晶体管T21、第二十二晶体管T22、第二十三晶体管T23、第二十四晶体管T24、第二十五晶体管T25以及第二十六晶体管T26均为P型晶体管。
例如,图9是本公开实施例提供的如图8所示的像素电路的驱动时序图。本公开的实施例还提供一种如图8所示像素电路的驱动方法,包括:预复位阶段t1、复位阶段t2、补偿阶段t3、初始化阶段t4、预发光阶段t5和发光阶段t6。
例如,在预复位阶段t1,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第三数据信号端Data3输出高电平信号。
例如,图10A是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在预复位阶段t1的导通状态示意图。在预复位阶段t1,第二十晶体管T20、第二十一晶体管T21、第二十二晶体管T22、第二十四晶体管T24、第二十五晶体管T25和第二十六晶体管T26均处于关闭状态,像素电路中没有形成通路;第二十三晶体管T23的导通状态与第三节点N3的电压有关。例如,预复位阶段可以给像素电路提供一个稳定的时间,使各电路元件的电压和电流状态稳定,防止电路异常情况发生。
例如,在复位阶段t2,第一控制端Sn-1输出低电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输
出高电平信号,第三数据信号端Data3输出高电平信号。
图10B是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在复位阶段t2的导通状态示意图。在复位阶段t2,第二十晶体管T20、第二十一晶体管T21、第二十二晶体管T22、第二十四晶体管T24和第二十六晶体管T26均处于关闭状态;由于第一控制端Sn-1输出低电平信号,第二十五晶体管T25导通,第三节点N3的电压为第三电源端Vx提供的复位电压Vvx,复位电压Vvx例如为能使P型晶体管开启的低电平电压,又例如,复位电压Vvx为负电压;此时,由于第三节点N3的电压为低电平的复位电压Vvx,第二十三晶体管T23开启但不会形成通路。这样就实现了通过第二十五晶体管T25将第二十三晶体管T23复位,即第三复位电路将第四驱动电路复位。例如,经过复位阶段可以增加第三节点N3和第三数据信号Vdata3之间的电压差,减小了在补偿阶段t3中,对第三存储电容C3的充电时间。
例如,在补偿阶段t3,第一控制端Sn-1输出高电平信号,第二控制端Sn输出低电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第三数据信号端Data3输出第三数据信号Vdata3(例如低电平信号)。
图10C是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在补偿阶段t3的导通状态示意图。在补偿阶段t3,第二十一晶体管T21、第二十四晶体管T24、第二十五晶体管T25和第二十六晶体管T26均处于关闭状态;由于第二控制端Sn输出低电平信号,第二十晶体管T20和第二十二晶体管T22导通,第三数据信号端Data3输出的第三数据信号Vdata3通过第二十晶体管T20和第二十二晶体管T22传输到第三节点N3,对第三存储电容C3充电完成后,第三节点N3的电压为Vdata3+Vth3(Vth3为第二十晶体管T20和第二十二晶体管T22的总压降),也就是说第三数据写入电路向第四驱动电路写入了数据,第三补偿电路对第四驱动电路进行了补偿,此时,第二十三晶体管T23开启但不会形成通路。
例如,在初始化阶段t4,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出低电平信号,第四控制端En输出高电平信号,第三数据信号端Data3输出高电平信号。
图10D是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在初始化阶段t4的导通状态示意图。在初始化阶段t4,第二十晶体管T20、第二十一晶体管T21、第二十二晶体管T22、第二十四晶体管T24和第二十五晶体管T25均处于关闭状态;由于第三存储电容C3存储电压的作用,第二十三晶体管T23保持和补偿阶段t3一样的开启状态;由于第三控制端Sn+1输出低电平信号,第二十六晶体管T26导通,第三电源端Vx提供的复位电压Vvx通过第二十六晶体管T26传输给第四有机发光二极管OLED4的第一极(第一极例如为阳极),即第四初始化电路将第四发光电路初始化。例如,复位电压Vvx小于或等于第二电源端ELVSS提供的第二发光电压Velvss,这样,经过初始化可以防止OLED的异常发光,例如可以防止OLED在非发光阶段的微亮发光。例如,对有机发光二极管进行初始化放电,保证了低灰阶的准确性及全暗态画面下的全黑,可以有效改善整个显示面板的对比度。
例如,在预发光阶段t5,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第三数据信号端Data3输出高电平信号。
图10E是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在预发光阶段t5的导通状态示意图。在预发光阶段t5,第二十晶体管T20、第二十一晶体管T21、第二十二晶体管T22、第二十四晶体管T24、第二十五晶体管T25和第二十六晶体管T26均处于关闭状态,像素电路中没有形成通路;由于第三存储电容C3存储电压的作用,第二十三晶体管T23保持和初始化阶段t4一样的开启状态。例如,预发光阶段可以给像素电路提供一个稳定的时间,使各电路元件的电压和电流状态稳定,防止电路异常情况发生。
例如,在发光阶段t6,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出低电平信号,第三数据信号端Data3输出高电平信号。
图10F是本公开实施例提供的如图8所示的像素电路被如图9所示的驱动时序驱动时在发光阶段t6的导通状态示意图。在发光阶段t6,第二十晶体管T20、第二十二晶体管T22、第二十五晶体管T25和第二十六晶体管T26
均处于关闭状态;由于第三存储电容C3存储电压的作用,第二十三晶体管T23保持和预发光阶段t5一样的开启状态;由于第四控制端En输出低电平信号,第二十一晶体管T21和第二十四晶体管T24处于开启状态,第一电源端ELVDD、第二十一晶体管T21、第二十三晶体管T23、第二十四晶体管T24、第四有机发光二极管OLED4和第二电源端ELVSS形成通路,第四有机发光二极管OLED4在第一电源端ELVDD提供的第一发光电压Velvdd和第二电源端ELVSS提供的第二发光电压Velvss的作用下,并在第二十三晶体管T23的驱动下发光,即第四发光控制电路控制第四发光电路的工作,第一电源端向第四发光电路提供第一发光电压,第二电源端向第四发光电路提供第二发光电压,第四驱动电路驱动第四发光电路,第四发光电路在工作时发光。
需要说明的是,如图8所示像素电路的驱动方法可以仅包括复位阶段t2、补偿阶段t3、初始化阶段t4和发光阶段t6,而不包括预复位阶段t1和预发光阶段t5,或者包括预复位阶段t1和预发光阶段t5中的一个,在此不做限定。
例如,如图11所示,本公开的实施例还提供一种显示面板1,包括本公开任一实施例的像素电路。
例如,显示面板1包括多个像素单元10,每个像素单元10包括本公开实施例提供的像素电路100和本公开实施例提供的像素电路200。也就是说,本公开实施例提供的显示面板1,包括具有第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二极管OLED3的像素电路以及具有第四有机发光二极管OLED4的像素电路。
例如,在本公开实施例提供的显示面板1中,第一有机发光二极管OLED1在工作时发出红光,第二有机发光二极管OLED2在工作时发出绿光,第三有机发光二极管OLED3在工作时发出黄光;第四有机发光二极管OLED4在工作时发出蓝光。
例如,本公开实施例提供的显示面板可以用于手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
例如,在本公开实施例提供的显示面板1中,像素电路100同时控制第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二
极管OLED3,节省了像素电路的数量,进而减小了像素电路占用的面积,提高了显示面板的分辨率。
本公开的实施例还提供一种驱动方法,包括:复位阶段、补偿阶段、初始化阶段和发光阶段,在复位阶段,第一控制端Sn-1输出有效信号,第二控制端Sn输出无效信号,第三控制端Sn+1输出无效信号,第四控制端En输出无效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号,第三数据信号端Data3输出待机信号;在补偿阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出有效信号,第三控制端Sn+1输出无效信号,第四控制端En输出无效信号,第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出待机信号,第三数据信号端Data3输出第三数据信号或待机信号;或者,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出第二数据信号,第三数据信号端Data3输出第三数据信号或待机信号;或者,第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出第二数据信号,第三数据信号端Data3输出第三数据信号或待机信号;在初始化阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出无效信号,第三控制端Sn+1输出有效信号,第四控制端En输出无效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号,第三数据信号端Data3输出待机信号;在发光阶段,第一控制端Sn-1输出无效信号,第二控制端Sn输出无效信号,第三控制端Sn+1输出无效信号,第四控制端En输出有效信号,第一数据信号端Data1输出待机信号,第二数据信号端Data2输出待机信号,第三数据信号端Data3输出待机信号。
例如,本公开实施例提供的驱动方法用于驱动显示面板1。
例如,以显示面板1中第一有机发光二极管OLED1和第四有机发光二极管发光OLED4、第二有机发光二极管OLED2和第三有机发光二极管OLED3关闭的情况为例进行说明,如图12所示,本公开的实施例提供的驱动方法,包括:预复位阶段t1、复位阶段t2、补偿阶段t3、初始化阶段t4、预发光阶段t5和发光阶段t6。
例如,在预复位阶段t1,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输
出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号,第三数据信号端Data3输出高电平信号;
例如,在复位阶段t2,第一控制端Sn-1输出低电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号,第三数据信号端Data3输出高电平信号;
例如,在补偿阶段t3,第一控制端Sn-1输出高电平信号,第二控制端Sn输出低电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出高电平信号,第三数据信号端Data3输出第三数据信号;
例如,在初始化阶段t4,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出低电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号,第三数据信号端Data3输出高电平信号;
例如,在预发光阶段t5,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出高电平信号,第一数据信号端Data1输出第一数据信号,第二数据信号端Data2输出高电平信号,第三数据信号端Data3输出第三数据信号;
例如,在发光阶段t6,第一控制端Sn-1输出高电平信号,第二控制端Sn输出高电平信号,第三控制端Sn+1输出高电平信号,第四控制端En输出低电平信号,第一数据信号端Data1输出高电平信号,第二数据信号端Data2输出高电平信号,第三数据信号端Data3输出高电平信号。
例如,当第一有机发光二极管OLED1、第二有机发光二极管OLED2、第三有机发光二极管OLED3和第四有机发光二极管发光OLED4的发光状态为其它组合情况时,可对驱动时序进行相应的变换,在此不再赘述。
例如,本公开实施例提供的显示面板及驱动方法可对有机发光二极管进行初始化放电,保证了低灰阶的准确性及全暗态画面下的全黑,有效改善整个显示面板的对比度。
例如,根据显示画面的不同,可以借用第三有机发光二极管OLED3的亮度取代第一有机发光二极管OLED1和第二有机发光二极管OLED2的组合
亮度,在需要第三有机发光二极管OLED3发光的显示画面中,会出现第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二极管OLED3同时发光,相当于增大了第一有机发光二极管OLED1和第二有机发光二极管OLED2发光材料的面积,减小了第一有机发光二极管OLED1和第二有机发光二极管OLED2发光的亮度,进而增加第一有机发光二极管OLED1和第二有机发光二极管OLED2的使用寿命。为了保证显示效果,需要增加第四有机发光二极管OLED4的发光面积来匹配第一有机发光二极管OLED1、第二有机发光二极管OLED2和第三有机发光二极管OLED3,也相当于提高了第四有机发光二极管OLED4的使用寿命。
虽然上文中已经用一般性说明及具体实施方式,对本公开作了详尽的描述,但在本公开实施例基础上,可以对之作一些修改或改进,这对本领域技术人员而言是显而易见的。因此,在不偏离本公开精神的基础上所做的这些修改或改进,均属于本公开要求保护的范围。
本专利申请要求于2016年7月26日递交的中国专利申请第201610596931.1号的优先权,在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
Claims (23)
- 一种像素电路,包括:第一发光电路,用于在工作时发光;第一驱动电路,用于驱动所述第一发光电路;第一补偿电路,用于补偿所述第一驱动电路;第一数据写入电路,用于向所述第一驱动电路写入数据;第一复位电路,用于将所述第一驱动电路复位;第一存储电路,用于存储所述第一驱动电路的驱动电压;第一初始化电路,用于将所述第一发光电路初始化;第一发光控制电路,用于控制所述第一发光电路的工作和关断;第二发光电路,用于在工作时发光;第二驱动电路,用于驱动所述第二发光电路;第二补偿电路,用于补偿所述第二驱动电路;第二数据写入电路,用于向所述第二驱动电路写入数据;第二复位电路,用于将所述第二驱动电路复位;第二存储电路,用于存储所述第二驱动电路的驱动电压;第二初始化电路,用于将所述第二发光电路初始化;第二发光控制电路,用于控制所述第二发光电路的工作和关断;第三发光电路,用于在工作时发光;第三发光控制电路,用于控制所述第三发光电路的工作和关断;第三驱动电路,用于驱动所述第三发光电路;第三初始化电路,用于将所述第三发光电路初始化;第一电源端,用于向所述第一发光电路、所述第二发光电路和所述第三发光电路提供第一发光电压;第二电源端,用于向所述第一发光电路、所述第二发光电路和所述第三发光电路提供第二发光电压;第三电源端,用于向所述第一复位电路和所述第二复位电路提供复位电压;第一数据信号端,用于向所述第一数据写入电路提供第一数据信号或待 机信号;第二数据信号端,用于向所述第二数据写入电路提供第二数据信号或待机信号;第一控制端,用于提供控制所述第一复位电路、所述第二复位电路工作和关断的第一控制信号;第二控制端,用于提供控制所述第一数据写入电路、所述第一补偿电路、所述第二数据写入电路、所述第二补偿电路工作和关断的第二控制信号;第三控制端,用于提供控制所述第一初始化电路、第二初始化电路、第三初始化电路工作和关断的第三控制信号;以及第四控制端,用于提供控制所述第一发光电路、所述第二发光控制电路、所述第三发光控制电路工作和关断的第四控制信号。
- 根据权利要求1所述的像素电路,其中,所述第一数据写入电路包括第一晶体管,所述第一发光控制电路包括第二晶体管和第五晶体管,所述第一补偿电路包括第三晶体管,所述第一驱动电路包括第四晶体管,所述第一复位电路包括第六晶体管,所述第一初始化电路包括第七晶体管,所述第一存储电路包括第一存储电容,所述第一发光电路包括第一有机发光二极管,所述第三发光控制电路包括第八晶体管和第十一晶体管,所述第三驱动电路包括第九晶体管和第十晶体管,所述第三初始化电路包括第十二晶体管,所述第二复位电路包括第十三晶体管,所述第二发光控制电路包括第十四晶体管和第十八晶体管,所述第二数据写入电路包括第十五晶体管,所述第二补偿电路包括第十六晶体管,所述第二驱动电路包括第十七晶体管,所述第二初始化电路包括第十九晶体管,所述第二存储电路包括第二存储电容,所述第二发光电路包括第二有机发光二极管,所述第三发光电路包括第三有机发光二极管。
- 根据权利要求2所述的像素电路,其中,所述第一晶体管的源极与所述第一数据信号端电连接,所述第一晶体管的栅极、所述第三晶体管的栅极和所述第二控制端电连接,所述第一晶体管的漏极、所述第二晶体管的漏极、所述第三晶体管的源极和所述第四晶体管的源极电连接;所述第二晶体管的栅极、所述第五晶体管的栅极和所述第四控制端电连 接,所述第二晶体管的源极、所述第一存储电容的第一端和所述第一电源端电连接;所述第三晶体管的漏极和第一节点电连接;所述第四晶体管的栅极和所述第一节点电连接,所述第四晶体管的漏极和所述第五晶体管的源极电连接;所述第五晶体管的漏极、所述第七晶体管的漏极和所述第一有机发光二极管的第一端电连接;所述第六晶体管的源极、所述第七晶体管的源极和所述第三电源端电连接,所述第六晶体管的栅极和所述第一控制端电连接,第六晶体管的漏极和所述第一节点电连接;所述第七晶体管的栅极和所述第三控制端电连接;所述第一存储电容的第二端和所述第一节点电连接;所述第一有机发光二极管的第二端和所述第二电源端电连接;所述第八晶体管的源极和所述第一电源端电连接,所述第八晶体管的栅极和所述第四控制端电连接,所述第八晶体管的漏极和所述第九晶体管的源极电连接;所述第九晶体管的栅极和所述第一节点电连接,所述第九晶体管的漏极和所述第十晶体管的源极电连接;所述第十晶体管的栅极和第二节点电连接,所述第十晶体管的漏极和所述第十一晶体管的源极电连接;所述第十一晶体管的栅极和所述第四控制端电连接,所述第十一晶体管的漏极、所述第三有机发光二极管的第一端和所述第十二晶体管的漏极电连接;所述第十二晶体管的栅极和所述第三控制端电连接,所述第十二晶体管的源极、所述第十三晶体管的漏极、所述第十九晶体管的源极和所述第三电源端电连接;所述第十三晶体管的源极和所述第二节点电连接,所述第十三晶体管的栅极和所述第一控制端电连接;所述第十四晶体管的源极、所述第二存储电容的第一端和所述第一电源端电连接,所述第十四晶体管的栅极、所述第十八晶体管的栅极和所述第四 控制端电连接,所述第十四晶体管的漏极、所述第十五晶体管的漏极、所述第十六晶体管的源极和所述第十七晶体管的源极电连接;所述第十五晶体管的源极和所述第二数据信号端电连接,所述第十五晶体管的栅极、所述第十六晶体管的栅极和所述第二控制端电连接;所述第十六晶体管的漏极和所述第二节点电连接;所述第十七晶体管的栅极和所述第二节点电连接,所述第十七晶体管的漏极和所述第十八晶体管的源极电连接;所述第十八晶体管的漏极、所述第十九晶体管的漏极和所述第二有机发光二极管的第一端电连接;所述第十九晶体管的栅极和所述第三控制端电连接;所述第二存储电容的第二端和所述第二节点电连接;所述第二有机发光二极管的第二端和所述第二电源端电连接;所述第三有机发光二极管的第二端和所述第二电源端电连接。
- 根据权利要求3所述的像素电路,其中,所述第一晶体管、所述第二晶体管、所述第三晶体管、所述第四晶体管、所述第五晶体管、所述第六晶体管、所述第七晶体管、所述第八晶体管、所述第九晶体管、所述第十晶体管、所述第十一晶体管、所述第十二晶体管、所述第十三晶体管、所述第十四晶体管、所述第十五晶体管、所述第十六晶体管、所述第十七晶体管、所述第十八晶体管和所述第十九晶体管均为薄膜晶体管。
- 根据权利要求3所述的像素电路,其中,所述第一晶体管、所述第二晶体管、所述第三晶体管、所述第四晶体管、所述第五晶体管、所述第六晶体管、所述第七晶体管、所述第八晶体管、所述第九晶体管、所述第十晶体管、所述第十一晶体管、所述第十二晶体管、所述第十三晶体管、所述第十四晶体管、所述第十五晶体管、所述第十六晶体管、所述第十七晶体管、所述第十八晶体管和所述第十九晶体管均为P型晶体管。
- 根据权利要求2-5任一项所述的像素电路,其中,第四晶体管的阈值电压等于第九晶体管的阈值电压,第十晶体管的阈值电压等于第十七晶体管的阈值电压。
- 根据权利要求2-5任一项所述的像素电路,其中,所述第一有机发光二极管在工作时发出第一颜色的光,所述第二有机发光二极管在工作时发出 第二颜色的光,所述第三有机发光二极管在工作时发出第三颜色的光,所述第一颜色的光与所述第二颜色的光的混合色为所述第三颜色的光。
- 根据权利要求7所述的像素电路,其中,所述第一颜色的光为红光,所述第二颜色的光为绿光,所述第三颜色的光为黄光。
- 一种像素电路,包括:第四发光电路,用于在工作时发光;第四驱动电路,用于驱动所述第四发光电路;第三补偿电路,用于补偿所述第四驱动电路;第三数据写入电路,用于向所述第四驱动电路写入数据;第三复位电路,用于将所述第四驱动电路复位;第三存储电路,用于存储所述第四驱动电路的驱动电压;第四初始化电路,用于将所述第四发光电路初始化;第四发光控制电路,用于控制所述第四发光电路的工作和关断;第一电源端,用于向所述第四发光电路提供第一发光电压;第二电源端,用于向所述第四发光电路提供第二发光电压;第三电源端,用于向所述第三复位电路提供复位电压;第三数据信号端,用于向所述第三数据写入电路提供第三数据信号或待机信号;第一控制端,用于提供控制所述第三复位电路工作和关断的第一控制信号;第二控制端,用于提供控制所述第三数据写入电路和所述第三补偿电路工作和关断的第二控制信号;第三控制端,用于提供控制所述第四初始化电路工作和关断的第三控制信号;以及第四控制端,用于提供控制所述第四发光控制电路工作和关断的第四控制信号。
- 根据权利要求9所述的像素电路,其中,所述第三数据写入电路包括第二十晶体管,所述第四发光控制电路包括第二十一晶体管和第二十四晶体管,所述第三补偿电路包括第二十二晶体管,所述第四驱动电路包括第二十三晶体管,所述第三复位电路包括第二十五晶体管,所述第四初始化电路 包括第二十六晶体管,所述第三存储电路包括第三存储电容,所述第四发光电路包括第四有机发光二极管。
- 根据权利要求10所述的像素电路,其中,所述第二十晶体管的源极与所述第三数据信号端电连接,所述第二十晶体管的栅极、所述第二十二晶体管的栅极和所述第二控制端电连接,所述第二十晶体管的漏极、所述第二十一晶体管的漏极、所述第二十二晶体管的源极和所述第二十三晶体管的源极电连接;所述第二十一晶体管的栅极、所述第二十四晶体管的栅极和所述第四控制端电连接,所述第二十一晶体管的源极、所述第三存储电容的第一端和所述第一电源端电连接;所述第二十二晶体管的漏极和第三节点电连接;所述第二十三晶体管的栅极和所述第三节点电连接,所述第二十三晶体管的漏极和所述第二十四晶体管的源极电连接;所述第二十四晶体管的漏极、所述第二十六晶体管的漏极和所述第四有机发光二极管的第一端电连接;所述第二十五晶体管的源极、所述第二十六晶体管的源极和所述第三电源端电连接,所述第二十五晶体管的栅极和所述第一控制端电连接,第二十五晶体管的漏极和所述第三节点电连接;所述第二十六晶体管的栅极和所述第三控制端电连接;所述第三存储电容的第二端和所述第三节点电连接;所述第四有机发光二极管的第二端和所述第二电源端电连接。
- 根据权利要求11所述的像素电路,其中,所述第二十晶体管、所述第二十一晶体管、所述第二十二晶体管、所述第二十三晶体管、所述第二十四晶体管、所述第二十五晶体管以及所述第二十六晶体管均为薄膜晶体管。
- 根据权利要求11所述的像素电路,其中,所述第二十晶体管、所述第二十一晶体管、所述第二十二晶体管、所述第二十三晶体管、所述第二十四晶体管、所述第二十五晶体管以及所述第二十六晶体管均为P型晶体管。
- 一种显示面板,包括如权利要求1-13任一项所述的像素电路。
- 根据权利要求14所述的显示面板,包括如权利要求1-8任一项所述的像素电路以及如权利要求9-13任一项所述的像素电路。
- 根据权利要求15所述的显示面板,包括如权利要求2-8任一项所述的像素电路以及如权利要求10-13任一项所述的像素电路。
- 根据权利要求16所述的显示面板,其中,在权利要求2-8任一项所述的像素电路中,所述第一有机发光二极管在工作时发出红光,所述第二有机发光二极管在工作时发出绿光,所述第三有机发光二极管在工作时发出黄光;在权利要求10-13任一项所述的像素电路中,所述第四有机发光二极管在工作时发出蓝光。
- 一种如权利要求1-8任一项所述像素电路的驱动方法,包括:复位阶段、补偿阶段、初始化阶段和发光阶段,其中,在所述复位阶段,所述第一控制端输出有效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号;在所述补偿阶段,所述第一控制端输出无效信号,所述第二控制端输出有效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出第一数据信号,所述第二数据信号端输出待机信号;或者,所述第一数据信号端输出待机信号,所述第二数据信号端输出第二数据信号;或者,所述第一数据信号端输出第一数据信号,所述第二数据信号端输出第二数据信号;在所述初始化阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出有效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号;在所述发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出有效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号。
- 根据权利要求18所述的驱动方法,还包括:预复位阶段和预发光阶段,其中,预复位阶段在所述发光阶段之后和所述复位阶段之前,所述预发光阶段在所述初始化阶段之后和所述发光阶段之前,在所述预复位阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号, 所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号;在所述预发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第一数据信号端输出待机信号,所述第二数据信号端输出待机信号。
- 根据权利要求18所述的驱动方法,其中,在所述补偿阶段,当所述第一数据信号端输出第一数据信号,所述第二数据信号端输出待机信号时,所述第一发光电路单独发光,所述第一数据信号用于控制所述第一发光电路的发光亮度;当所述第一数据信号端输出待机信号,所述第二数据信号端输出第二数据信号时,所述第二发光电路单独发光,所述第二数据信号用于控制所述第二发光电路的发光亮度;当所述第一数据信号端输出第一数据信号,所述第二数据信号端输出第二数据信号时,所述第一发光电路、所述第二发光电路和所述第三发光电路同时发光,所述第一数据信号用于控制所述第一发光电路的发光亮度,所述第二数据信号用于控制所述第二发光电路的发光亮度,所述第一数据信号和所述第二数据信号中较小的数据信号用于控制所述第三发光电路的发光亮度。
- 一种如权利要求9-13任一项所述像素电路的驱动方法,包括:复位阶段、补偿阶段、初始化阶段和发光阶段,其中,在所述复位阶段,所述第一控制端输出有效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号;在所述补偿阶段,所述第一控制端输出无效信号,所述第二控制端输出有效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出第三数据信号或待机信号;在所述初始化阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出有效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号;在所述发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出有效信号, 所述第三数据信号端输出待机信号。
- 根据权利要求21所述的驱动方法,还包括:预复位阶段和预发光阶段,其中,预复位阶段在所述发光阶段之后和所述复位阶段之前,所述预发光阶段在所述初始化阶段之后和所述发光阶段之前,在所述预复位阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号;在所述预发光阶段,所述第一控制端输出无效信号,所述第二控制端输出无效信号,所述第三控制端输出无效信号,所述第四控制端输出无效信号,所述第三数据信号端输出待机信号。
- 一种驱动方法,包括如权利要求18所述的驱动方法以及如权利要求21所述的驱动方法。
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| EP3493192B1 (en) | 2023-05-10 |
| US10290260B2 (en) | 2019-05-14 |
| US20180261160A1 (en) | 2018-09-13 |
| EP3493192A1 (en) | 2019-06-05 |
| CN106023898B (zh) | 2018-07-24 |
| EP3493192A4 (en) | 2019-12-25 |
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