WO2020060008A1 - 표시 장치 - Google Patents
표시 장치 Download PDFInfo
- Publication number
- WO2020060008A1 WO2020060008A1 PCT/KR2019/007907 KR2019007907W WO2020060008A1 WO 2020060008 A1 WO2020060008 A1 WO 2020060008A1 KR 2019007907 W KR2019007907 W KR 2019007907W WO 2020060008 A1 WO2020060008 A1 WO 2020060008A1
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- switching element
- electrode
- gate
- driving
- data
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- 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]
- G09G3/3275—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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- 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]
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- 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]
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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]
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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]
- G09G3/3275—Details of drivers for data electrodes
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1216—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being capacitors
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Definitions
- the present invention relates to a display device and a driving method thereof.
- a display device in general, includes a display panel and a display panel driver.
- the display panel includes a plurality of pixels, a plurality of gate lines, a plurality of data lines, and a plurality of emission control lines.
- the display panel driver includes a gate driver providing a gate signal to the plurality of gate lines, a data driver providing a data voltage to the data lines, a light emitting controller providing a light emission control signal to the light emission control line, and the gate driver ,
- a driving control unit generating control signals for controlling the data driving unit and the light emission control unit.
- One object of the present invention is to provide a display device that reduces power consumption of the display panel.
- a display device includes a display panel including a first type of switching element and a pixel including a second type of switching element different from the first type.
- a gate driver for generating a gate signal based on a gate clock signal, a gate driver for providing the gate signal to the display panel, a data driver for providing a data voltage to the display panel, and a light emitting control unit for providing a light emission control signal to the display panel;
- the gate driving unit, the data driving unit and a driving control unit that generates control signals for controlling the light emission control unit may be included.
- the saik driving control unit provides the gate clock signal swinging between a high level and a low level during a writing frame in which data is written to the pixel in a low frequency driving mode, and maintains the data written in the pixel
- the gate clock signal having a DC voltage during a holding frame may be provided to the gate driver.
- the gate clock signal in the low-frequency driving mode, may swing between the high level and the low level during the lighting frame, and maintain the low level during the holding frame.
- the gate clock signal in the low frequency driving mode, may swing between the high level and the low level during the writing frame, and maintain the high level during the holding frame.
- the first type of switching element may be a polysilicon thin film transistor
- the second type of switching element may be an oxide thin film transistor
- the first type of switching element may be a P-type transistor
- the second type of switching element may be an N-type transistor
- the pixel includes a first switching element including a gate electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, the first data writing gate A second switching element including a gate electrode to which a signal is applied, a first electrode to which the data voltage is applied, and a second electrode connected to the second node, a gate electrode to which a second data write gate signal is applied, and the first A third switching element including a first electrode connected to a node and a second node connected to the third node, a gate electrode to which a data initialization gate signal is applied, a first electrode to which an initialization voltage is applied, and the first node A fourth switching element including a second electrode connected, a gate electrode to which the light emission control signal is applied, a first electrode to which a high power voltage is applied, and a second electrode connected to the second node A sixth switching element including a fifth switching element including a pole, a gate electrode to which the emission control signal is
- the first switching element, the second switching element, the fifth switching element and the sixth switching element are the polysilicon thin film transistor, the third switching element, the fourth switching element and the The seventh switching element may be the oxide thin film transistor.
- the second switching element, the fifth switching element, and the sixth switching element are driven at a first driving frequency
- the third switching element is lower than a first driving frequency. It can be driven at 2 driving frequencies.
- the driving control unit may include a gate control unit generating the gate clock signal.
- a display device includes a display panel including a first type of switching element and a pixel including a second type of switching element different from the first type.
- a gate driving unit providing a gate signal to the display panel, a data driving unit providing a data voltage to the display panel, and a light emission control unit and a gate driving unit providing the light emission control signal to the display panel, the data driving unit and the light emission control unit It may include a driving control for generating the control signal.
- the driving control unit supplies an analog driving voltage for operating the data driving unit to the data driving unit during a writing frame in which data is written to the pixel in a low frequency driving mode, and holds the data written to the pixel. ) During the frame, the analog driving voltage that does not operate the data driving unit may be supplied to the data driving unit.
- the driving control unit in the low-frequency driving mode, provides an analog driving voltage having a first voltage level during the writing frame to the data driver, and a second voltage level lower than a first voltage level during the holding frame.
- An analog driving voltage having a can be provided to the data driving unit.
- the first type of switching element may be a polysilicon thin film transistor
- the second type of switching element may be an oxide thin film transistor
- the first type of switching element may be a P-type transistor
- the second type of switching element may be an N-type transistor
- the pixel includes a first switching element including a gate electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, the first date writing gate A second switching element including a gate electrode to which a signal is applied, a first electrode to which the data voltage is applied, and a second electrode connected to the second node, a gate electrode to which a second data write gate signal is applied, and the first A third switching element including a first electrode connected to a node and a second node connected to the third node, a gate electrode to which a data initialization gate signal is applied, a first electrode to which an initialization voltage is applied, and the first node A fourth switching element including a second electrode connected, a gate electrode to which the light emission control signal is applied, a first electrode to which a high power voltage is applied, and a second electrode connected to the second node A fifth switching element comprising: a sixth switching element comprising a gate electrode to which the emission control signal is applied, a first
- the first switching element, the second switching element, the fifth switching element and the sixth switching element are the polysilicon thin film transistor, the third switching element, the fourth switching element and the The seventh switching element may be the oxide thin film transistor.
- the second switching element, the fifth switching element, and the sixth switching element are driven at a first driving frequency
- the third switching element is lower than a first driving frequency. It can be driven at 2 driving frequencies.
- the pixel comprises an eighth electrode including a gate electrode to which a sustain voltage enable signal is applied, a first electrode to which a sustain voltage is applied, and a second electrode connected to the first electrode of the second switching element. It may further include a switching element.
- the driving control unit may provide an analog driving voltage during the lighting frame to the data driving unit and a sustain voltage during the holding frame to the pixel.
- the eighth switching element may be the polysilicon thin film transistor.
- the driving control part may include a voltage generating part that generates a voltage provided to the data driving part and the pixel.
- the display device gates a gate clock signal having a DC voltage during a holding frame in a low frequency driving mode of a display device including a pixel including a first type switching element and a second type switching element.
- a gate clock signal having a DC voltage during a holding frame in a low frequency driving mode of a display device including a pixel including a first type switching element and a second type switching element.
- the display device consumes by not operating a data driver during a holding frame in a low frequency driving mode of a display device including a pixel including a first type of switching element and a second type of switching element. Power can be reduced.
- the display device provides a sustain voltage to a pixel during a holding frame in a low frequency driving mode of a display device including a pixel including a first type of switching element and a second type of switching element. , It is possible to prevent the leakage current from occurring and to maintain the luminance of the pixel constant.
- FIG. 1 is a block diagram illustrating a display device according to some example embodiments of the present invention.
- FIG. 2 is a circuit diagram illustrating an example of a pixel included in the display device of FIG. 1.
- FIG. 3 is a timing diagram illustrating input signals applied to the pixel of FIG. 2.
- FIG. 4 is a timing diagram showing an example of signals applied to the pixel of FIG. 2 in a low frequency driving mode.
- FIG. 5 is a timing diagram illustrating another example of signals applied to the pixel of FIG. 2 in a low frequency driving mode.
- FIG. 6 is a circuit diagram illustrating another example of pixels included in the display device of FIG. 1.
- FIG. 7 is a timing diagram illustrating an example of signals applied to the pixel of FIG. 6 in a low frequency driving mode.
- FIG. 8 is a block diagram illustrating an electronic device including the display device of FIG. 1.
- FIG. 9 is a diagram illustrating an example in which the electronic device of FIG. 8 is implemented as a smart phone.
- FIG. 1 is a block diagram illustrating a display device according to some example embodiments of the present invention.
- the display device 100 may include a display panel 110 and a display panel driver.
- the display panel driver may include a gate driver 120, a data driver 130, a light emitting control unit 140, and a driving control unit 150.
- the display panel 110 includes a plurality of gate lines (GWPL, GWNL, GIL, GBL), a plurality of data lines (DL), a plurality of emission control lines (EML), a sustain voltage supply line (VsusL), and the A plurality of pixels PX electrically connected to each of the gate lines GWPL, GWNL, GIL, and GBL, the data lines DL, the emission control lines EML, and the sustain voltage supply lines VsusL.
- the gate lines GWPL, GWNL, GIL, and GBL, the emission control lines EML, and the sustain voltage supply lines VsusL extend in the first direction D1 and are perpendicular to the first direction D1. It may be arranged in the second direction (D2).
- the data lines DL extend in the second direction D2 and may be arranged in the first direction D1.
- the first direction D1 may be parallel to the long side of the display panel 110, and the second direction D2 may be parallel to the short side of the display panel 110.
- Each pixel PX may be formed in an area where gate lines and data lines DL intersect.
- the driving control unit 150 may receive input image data IMG and an input control signal CON from an external device.
- the input image data IMG may include red image data, green image data, and blue image data.
- the input image data IMG may include white image data.
- the input image data IMG may include magenta image data, yellow image data, and cyan image data.
- the input control signal CON may include a master clock signal and a data enable signal.
- the input control signal CON may further include a vertical synchronization signal and a horizontal synchronization signal.
- the driving control unit 150 controls control signals CTL1 and CTL2 that control the gate driving unit 120, the data driving unit 130, and the emission control unit 140 based on the input image data IMG and the input control signal CON. CTL3).
- the driving control unit 150 may generate a first control signal CTL1 for controlling the operation of the gate driving unit 120 based on the input control signal CON.
- the driving control unit 150 may output the first control signal CTL1 to the gate driving unit 120.
- the first control signal CTL1 may include a vertical start signal and a gate clock signal.
- the driving control unit 150 provides the gate driving unit 120 with a gate clock signal swinging between a high level and a low level during a writing frame writing data to the pixel PX in a low frequency driving mode
- a gate clock signal having a DC voltage may be provided to the gate driver 120 during a holding frame for holding data written in the pixel PX.
- the driving control unit 150 may include a gate control unit that generates a gate clock signal.
- the driving control unit 150 may generate a second control signal CTL2 for controlling the operation of the data driving unit 130 based on the input control signal CON.
- the driving control unit 150 may output the second control signal CTL2 to the data driving unit 130.
- the second control signal CTL2 may include a horizontal start signal and a load signal.
- the driving control unit 150 may generate a data signal DATA based on the input image data IMG. For example, the driving control unit 150 may convert the input image data IMG into a data signal DATA by applying an algorithm for correcting the image quality of the input image data IMG. The driving control unit 150 may output the data signal DATA to the data driving unit 130.
- the driving control unit 150 may generate an analog driving voltage AVDD for operating the data driving unit 130.
- the driving control unit 150 may output the analog driving voltage AVDD to the data driving unit 130.
- the driving control unit 150 may generate a holding voltage Vsus for keeping the driving current of the pixel PX constant.
- the driving control unit 150 may provide the sustain voltage Vsus to the pixel PX.
- the driving control unit 150 may include a data driving unit 130 and a voltage generation unit that generates a voltage provided to the pixel PX.
- the driving control unit 150 provides the analog driving voltage AVDD having the first voltage level during the writing frame in the low frequency driving mode to the data driving unit 130, and the second voltage level during the holding frame (eg For example, an analog driving voltage AVDD having 0V may be provided to the data driver 130.
- the driving control unit 150 provides the analog driving voltage AVDD having the first voltage level during the writing frame in the low frequency driving mode to the data driving unit 130 and maintains the third voltage level during the holding frame.
- the voltage Vsus may be provided to the pixel PX.
- the third voltage level may be the same as or different from the first voltage level.
- the driving control unit 150 may generate a third control signal CTL3 for controlling the operation of the light emission control unit 140 based on the input control signal CON.
- the driving control unit 150 may output the third control signal CTL3 to the light emission control unit 140.
- the gate driver 120 may generate gate signals GWP, GWN, GI, GB in response to the first control signal CTL1 supplied from the drive controller 150.
- the gate driver 120 may output gate signals GWP, GWN, GI, and GB to the gate lines GWPL, GWNL, GIL, and GBL.
- the data driving unit 130 may generate the data voltage Vd based on the second control signal CTL2, the analog driving voltage AVDD, and the data signal DATA supplied from the driving control unit 150.
- the data driving unit 130 may generate a gamma reference voltage based on the second control signal CTL2 and the analog driving voltage AVDD received from the driving control unit 150.
- the gamma reference voltage may have a value corresponding to each data signal DATA.
- the data driving unit 130 may generate a gamma reference voltage by distributing the analog driving voltage AVDD supplied from the driving control unit 150.
- the data driver 130 may convert the data signal DATA to an analog data voltage Vd using a gamma reference voltage.
- the data driver 130 may output the data voltage Vd to the data line DL.
- the light emission control unit 140 may generate a light emission control signal in response to a third control signal supplied from the driving control unit 150.
- the emission control unit 140 may output emission control signals to the emission control lines EML.
- FIG. 2 is a circuit diagram illustrating an example of a pixel included in the display device of FIG. 1, and FIG. 3 is a timing diagram showing input signals applied to the pixel of FIG. 2.
- the display panel includes a plurality of pixels PX, and each of the pixels PX may include an organic light emitting diode (OLED).
- OLED organic light emitting diode
- the pixels PX receive data write gate signals GWP, GWN, data initialization gate signal GI, organic light emitting diode initialization gate signal GB, and light emission control signal EM to the level of the data voltage Vd. Accordingly, the image may be displayed by emitting an organic light emitting diode (OLED).
- OLED organic light emitting diode
- each pixel PX may include a first type of switching element and a second type of switching element different from the first type.
- the first type of switching element may be a polysilicon thin film transistor.
- the first type of switching element may be a low temperature polysilicon (LTPS) thin film transistor.
- the second type of switching element may be an oxide thin film transistor.
- the first type of switching element may be a P-type transistor, and the second type of switching element may be an N-type transistor.
- the data write gate signals GWP and GWN may include a first data write gate signal GWP and a second data write gate signal GWN.
- the first data write gate signal GWP is applied to the P-type transistor, and may have a low level activation signal at a data write timing.
- the second data write gate signal GWN is applied to the N-type transistor, and may have a high level activation signal at the data write timing.
- Each of the pixels PX according to embodiments of the present invention includes first to seventh switching elements T1, T2, T3, T4, T5, T6, T7, storage capacitor CST, and organic light emitting diode OLED It may include.
- the first switching element T1 may include a gate electrode connected to the first node N1, a first electrode connected to the second node N2, and a second electrode connected to the third node N3.
- the first switching element T1 may be a polysilicon thin film transistor.
- the first switching element T1 may be a P-type thin film transistor.
- the first electrode of the first switching element T1 may be a source electrode, and the second electrode may be a drain electrode.
- the second switching element T2 includes a gate electrode to which the first data write gate signal GWP is applied, a first electrode to which the data voltage Vd is applied, and a second electrode connected to the second node N2. You can.
- the second switching element T2 may be a polysilicon thin film transistor.
- the second switching element T2 may be a P-type thin film transistor.
- the first electrode of the second switching element T2 may be a source electrode, and the second electrode may be a drain electrode.
- the third switching element T3 includes a gate electrode to which the second data write gate signal GWN is applied, a first electrode connected to the first node N1 and a second electrode connected to the third node N3. can do.
- the third switching element T3 may be an oxide thin film transistor.
- the third switching element T3 may be an N-type thin film transistor.
- the first electrode of the third switching element T3 may be a source electrode, and the second electrode may be a drain electrode.
- the fourth switching element T4 may include a gate electrode to which the data initialization gate signal GI is applied, a first electrode to which the initialization voltage VI is applied, and a second electrode connected to the first node N1.
- the fourth switching element T4 may be an oxide thin film transistor.
- the fourth switching element T4 may be an N-type thin film transistor.
- the first electrode of the fourth switching element T4 may be a source electrode, and the second electrode may be a drain electrode.
- the fifth switching element T5 may include a gate electrode to which the emission control signal EM is applied, a first electrode to which the high power voltage ELVDD is applied, and a second electrode connected to the second node N2.
- the fifth switching element T5 may be a polysilicon thin film transistor.
- the fifth switching element T5 may be a P-type thin film transistor.
- the first electrode of the fifth switching element T5 may be a source electrode, and the second electrode may be a drain electrode.
- the sixth switching element T6 includes a gate electrode to which the emission control signal EM is applied, a first electrode connected to the third node N3 and a second electrode connected to the anode electrode of the organic light emitting diode OLED. can do.
- the sixth switching element T6 may be a polysilicon thin film transistor.
- the sixth switching element T6 may be a P-type thin film transistor.
- the first electrode of the sixth switching element T6 may be a source electrode, and the second electrode may be a drain electrode.
- the seventh switching element T7 includes a gate electrode to which the organic light emitting diode initialization gate signal GB is applied, a first electrode to which the initialization voltage VI is applied, and a second electrode connected to the anode electrode of the organic light emitting diode OLED. It may include.
- the seventh switching element T7 may be an oxide thin film transistor.
- the seventh switching element T7 may be an N-type thin film transistor.
- the first electrode of the seventh switching element T7 may be a source electrode, and the second electrode may be a drain electrode.
- the storage capacitor CST may include a first electrode to which a high power voltage is applied and a second electrode to which the first node N1 is connected.
- the organic light emitting diode OLED may include an anode electrode and a cathode electrode to which a low power voltage ELVSS is applied.
- the pixel PX may operate in the first period T1 to the fourth period T4.
- the fourth switching element T4 is turned on in response to the initialization gate signal GI to initialize the first node N1 and the storage capacitor CST.
- the second switching element T2 and the third switching element T3 are turned on in response to the first data write gate signal GWP and the second data write gate signal GWN, so that the first switching is performed.
- the threshold voltage of the element T1 is compensated, and the data voltage Vd compensated for the threshold voltage may be written to the first node N1.
- the seventh switching element T7 is turned on in response to the organic light emitting diode initialization gate signal GB to initialize the anode electrode of the organic light emitting diode OLED.
- the fifth switching element T5 and the sixth switching element T6 are turned on in response to the emission control signal EM to emit the organic light emitting diode OLED.
- the data initialization gate signal GI may have an activation level.
- the activation level of the data initialization gate signal GI may be a high level.
- the first data write gate signal GWP and the second data write gate signal GWN may have an activation level.
- the activation level of the first data write gate signal GWP may be a low level
- the activation level of the second data write gate signal GWN may be a high level.
- the second switching element T2 and the third switching element T3 may be turned on.
- the first switching element T1 may also be turned on by the initialization voltage VI.
- the data voltage Vd supplied to the first electrode of the second switching element T2 is set to the first node N1 along the path formed by turning on the first to third switching elements T1, T2, and T3. You can.
- the threshold voltage of the first switching element T1 is compensated for the data voltage Vd (that is, at the data voltage).
- the voltage minus the threshold voltage may be set at the first node N1.
- the organic light emitting diode initialization gate signal GB may have an activation level.
- the activation level of the organic light emitting diode initialization gate signal GB may be a high level.
- the seventh switching element T7 is turned on so that the initialization voltage VI may be applied to the anode electrode of the organic light emitting diode OLED.
- the emission control signal EM may have an activation level.
- the activation level of the emission control signal EM may be a low level.
- the fifth switching element T5 and the sixth switching element T6 may be turned on.
- the first switching element T1 may also be turned on by the data voltage Vd.
- the first switching element T1 may generate a driving current based on the data voltage Vd.
- the driving current is supplied to the anode electrode of the organic light emitting diode (OLED) through the sixth switching element (T6) so that the organic light emitting diode (OLED) can emit light.
- FIG. 4 is a timing diagram showing an example of signals applied to the pixels of FIG. 2 in a low frequency driving mode.
- the display device may be driven in a normal driving mode operating at a normal driving frequency and a low frequency driving mode operating at a frequency lower than the normal driving frequency.
- the display panel may operate in a normal driving mode.
- the display panel may operate in a low frequency driving mode.
- the display panel may operate in the low-frequency driving mode.
- the display panel is driven in units of frames, and may be refreshed every frame in the normal driving mode. Therefore, the normal driving mode may include only a writing frame that writes data to pixels. In the low frequency driving mode, the display panel may be refreshed at a frequency in the low frequency driving mode. Therefore, the low-frequency driving mode may include a writing frame for writing data to a pixel and a holding frame for holding data written in a pixel. For example, when the frequency of the general driving mode is 60 Hz and the frequency of the low frequency driving mode is 1 Hz, the low frequency driving mode includes one writing frame and 59 holding frames for 1 second. do.
- the second switching element T2, the fifth switching element T5, and the sixth switching element T6 operate at 60 Hz
- the third switching element T3 operates at 1 Hz. can do.
- the low frequency driving mode includes 10 writing frames and 50 holding frames for 1 second. do.
- the frequency of the normal driving mode is 60 Hz and the frequency of the low frequency driving mode is 10 Hz
- five consecutive holding frames may be disposed between two neighboring lighting frames.
- the second switching element T2, the fifth switching element T5, and the sixth switching element T6 operate at 60 Hz
- the third switching element T3 operates at 10 Hz. can do.
- the gate clock signals CLK1 and CLK2 may include a first gate clock signal CLK1 and a second gate clock signal CLK2.
- the second gate clock signal CLK2 may be a signal in which the first gate clock signal CLK1 is delayed.
- the second gate clock signal CLK2 may be an inversion signal of the first gate clock signal CLK1.
- the gate clock signal is not limited thereto.
- the gate driver may be further provided with a gate clock signal according to the configuration of the stage generating the gate signal.
- the driving control unit of the display device may provide a gate clock signal having a DC voltage during a holding frame.
- the gate clock signals CLK1 and CLK2 may swing between a high level and a low level during a writing frame, and maintain a low level during a holding frame.
- the gate clock signals CLK1 and CLK2 may swing between the high level and the low level during the writing frame, and maintain the high level during the holding frame.
- the high level may have a gate-on voltage level
- the low level may have a gate-off voltage level.
- the first gate clock signal CLK1 may swing between a high level and a low level during a writing frame, and maintain a low level during a holding frame.
- the second gate clock signal CLK2 may swing between a high level and a low level during the writing frame, and maintain a high level during the holding frame.
- the display device according to embodiments of the present invention does not swing the gate clock signals CLK1 and CLK2 during a holding frame in a low frequency driving mode, and maintains the DC power having a high level or a low level, thereby consuming power. Can be reduced.
- FIG. 5 is a timing diagram illustrating another example of signals applied to the pixel of FIG. 2 in a low frequency driving mode.
- the display device may be driven in a normal driving mode operating at a normal driving frequency and a low frequency driving mode operating at a frequency lower than the normal driving frequency.
- the display panel may operate in a normal driving mode.
- the display panel may operate in a low frequency driving mode.
- the display panel can operate in a low-frequency driving mode.
- the display panel is driven in units of frames, and may be refreshed every frame in the normal driving mode. Therefore, the normal driving mode may include only a writing frame that writes data to pixels. In the low frequency driving mode, the display panel may be refreshed at a frequency in the low frequency driving mode. Therefore, the low-frequency driving mode may include a writing frame for writing data to a pixel and a holding frame for holding data written in a pixel.
- the driving control unit of the display device may not operate the data driving unit during the holding frame.
- the driving control unit of the display device provides the analog driving voltage AVDD having the first voltage level during the writing frame in the low-frequency driving mode to the data driving unit and removes it during the holding frame.
- the analog driving voltage AVDD having the second voltage level LV2 lower than one voltage level LV0 may be provided to the data driver.
- the second voltage level may have a voltage level (eg, 0V) that does not operate the data driver.
- the data driving unit may generate a gamma reference voltage based on the analog driving voltage AVDD having the first voltage level LV1 during the writing frame.
- the data driver may convert the data signal supplied from the driving controller to an analog data voltage Vd using a gamma reference voltage, and output the data voltage Vd to the data line.
- the data driving unit may be provided with an analog driving voltage AVDD having a second voltage level LV2 during a holding frame.
- the data driver may not operate during the holding frame based on the analog drive voltage AVDD having the second voltage level LV2. Therefore, in the display device according to the exemplary embodiments of the present invention, since the data driving unit does not operate during the holding frame in the low frequency driving mode, power consumption can be reduced.
- FIG. 6 is a circuit diagram illustrating another example of a pixel included in the display device of FIG. 1, and FIG. 7 is a timing diagram showing an example of signals applied to the pixel of FIG. 6 in a low frequency driving mode.
- each of the pixels PXs includes first to eighth switching elements T1, T2, T3, T4, T5, T6, T7, and T8, and a storage capacitor CST. ) And an organic light emitting diode (OLED).
- the pixel PX of FIG. 6 according to embodiments of the present invention may have a structure substantially the same as the pixel PX of FIG. 2, except that the eighth switching element T8 is included.
- the eighth switching element T8 is a gate electrode to which the sustain voltage enable signal Vsus_en is applied, a first electrode to which the sustain voltage Vsus is applied, and a second electrode connected to the first electrode of the second switching element T2. It may include an electrode.
- the eighth switching element T8 may be a polysilicon transistor.
- the eighth switching element T8 may be a P-type thin film transistor.
- the first electrode of the eighth switching element T8 may be a source electrode, and the second electrode may be a drain electrode.
- the driving control unit of the display device provides the analog driving voltage AVDD during the writing frame in the low-frequency driving mode to the data driving unit, and the sustain voltage Vsus during the holding frame in pixels.
- the driving control unit may include a voltage generating unit generating the analog driving voltage AVDD and the sustain voltage Vsus.
- the driving control unit generates a voltage having a first voltage level during a writing frame and provides it to the data driving unit as the analog driving voltage AVDD, and is equal to or equal to the first voltage level during a holding frame. .., Voltages having different voltage levels may be generated and provided to the pixels as the sustain voltage Vsus. Since the voltage is not supplied to the data driver during the holding frame, the data driver may not operate.
- the driving control unit may provide a sustain voltage enable signal Vsus_en to the pixel. 6 and 7, the sustain voltage enable signal Vsus_en may be activated during the holding frame HOLDING FRAME and supplied to the gate electrode of the eighth switching element T8. The eighth switching element T8 may be turned on in response to the holding voltage enable signal Vsus_en during the holding frame. Thus, the holding voltage Vsus may be supplied to the first electrode of the eighth switching element T8 through the eighth switching element T8 during the holding frame.
- a leakage current may be generated through the second switching element T2 connected to the first switching element T1 during the holding frame.
- the luminance of the pixel PX may be changed.
- the pixel PX of the display device according to the exemplary embodiments of the present invention applies a sustain voltage Vsus to the first electrode of the second switching element T2 through the eighth switching element T8 during the holding frame. By supplying it, it is possible to prevent the leakage current caused by the second switching element T2 from being generated. Therefore, the pixel PX can emit light with a constant luminance.
- the driving control unit of the display device provides the analog driving voltage AVDD to the data driving unit during the writing frame and the analog to the data driving unit during the holding frame.
- the driving control unit of the display device may prevent the driving current from being changed due to the leakage current by providing the sustain voltage Vsus to the pixel PX during the holding frame. have.
- FIG. 8 is a block diagram illustrating an electronic device including the display device of FIG. 1, and FIG. 9 is a diagram illustrating an example in which the electronic device of FIG. 8 is implemented as a smartphone.
- the electronic device 200 includes a processor 210, a memory device 220, a storage device 230, an input / output device 240, a power supply 250, and a display device 260. It can contain.
- the display device 260 may correspond to the display device 100 of FIG. 1.
- the electronic device 200 may further include various ports that can communicate with a video card, sound card, memory card, USB device, or other systems.
- the electronic device 200 may be implemented as a smartphone 300, but the electronic device 200 is not limited thereto.
- the processor 210 can perform certain calculations or tasks.
- the processor 210 may be a microprocessor, a central processing unit (CPU), or the like.
- the processor 210 may be connected to other components through an address bus, a control bus, and a data bus.
- the processor 210 may also be connected to an expansion bus, such as a Peripheral Component Interconnect (PCI) bus.
- the memory device 220 may store data necessary for the operation of the electronic device 200.
- the memory device 220 includes EPROM, EEPROM, flash memory, phase change random access memory (PRAM), resistance random access memory (RRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), and the like.
- Non-volatile memory devices and / or volatile memory devices such as dynamic random access memory (DRAM), static random access memory (SRAM), and mobile DRAM may be included.
- the storage device 230 may include a solid state drive (SSD), a hard disk drive (HDD), a CD-ROM, and the like.
- the input / output device 240 may include input means such as a keyboard, keypad, touch pad, touch screen, and mouse, and output means such as a speaker and a printer.
- the display device 260 may be provided in the input / output device 240.
- the power supply 250 may supply power required for the operation of the electronic device 200.
- the display device 260 may be connected to other components through the buses or other communication links.
- the display device 260 may include a display panel, a gate driver, a data driver, a light emitting controller, and a driving controller.
- the display panel may include a plurality of pixels.
- the driving control unit may generate control signals for controlling the gate driving unit, the data driving unit, and the emission control unit based on the input image data and the input control signal.
- the gate driver may generate a gate signal based on the first control signal supplied from the driving control unit and output the gate signal to the gate line of the display panel.
- the data driver may generate a data signal based on the second control signal supplied from the driving control unit and output the data signal to the data line of the display panel.
- the light emission control unit may generate a light emission control signal based on the third control signal supplied from the driving control unit and output the light emission control signal to the light emission control line of the display panel.
- the driving control unit may generate a first control signal for controlling the operation of the gate driving unit based on the input control signal.
- the first control signal may include a vertical start signal and a gate clock signal.
- the display panel according to embodiments of the present invention may operate in a writing frame for writing data to a pixel and a holding frame for holding data written in a pixel in a low frequency driving mode.
- the driving control unit may reduce the power consumption of the display device 260 by providing a gate clock signal having a DC voltage during the holding frame to the gate driving unit.
- the driving control unit may generate a second control signal for controlling the operation of the data driving unit based on the input control signal.
- the driving control unit may generate an analog driving voltage for operating the data driving unit.
- the driving control unit of the display device 260 may not operate the data driving unit during the holding frame.
- the driving control unit provides an analog driving voltage having a first voltage level during a writing frame to the data driving unit, and provides an analog driving voltage having a second voltage level (eg, 0V) during a holding frame to the data driving unit. can do. Since the data driver does not operate during the holding frame, power consumption of the display device 260 may be reduced.
- the driving control unit of the display device 260 provides an analog driving voltage having a first voltage level during a writing frame to a data driver, and a third voltage level during a holding frame.
- a sustain voltage can be provided to the pixel.
- the data driver may not operate because the analog driving voltage is not provided during the holding frame.
- the pixel is provided with a sustain voltage during the holding frame, thereby preventing leakage current of the driving transistor (first switching element) from being generated. Accordingly, power consumption of the display device 260 is reduced, and display quality can be improved.
- the present invention can be applied to all electronic devices having a display device.
- the present invention includes televisions, computer monitors, laptops, digital cameras, cell phones, smart phones, smart pads, tablet PCs, PDAs, PMPs, MP3 players, navigation, video phones, head mounted displays ( Head Mount Display (HMD) device.
- HMD Head Mount Display
- display device 110 display panel
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Abstract
Description
Claims (20)
- 제1 타입의 스위칭 소자 및 상기 제1 타입과 상이한 제2 타입의 스위칭 소자를 포함하는 픽셀을 포함하는 표시 패널;게이트클럭 신호에 기초하여 게이트 신호를 생성하고, 상기 게이트 신호를 상기 표시 패널에 제공하는 게이트 구동부;데이터전압을 상기 표시 패널에 제공하는 데이터 구동부;발광 제어 신호를 상기 표시 패널에 제공하는 발광 제어부; 및상기 게이트 구동부, 상기 데이터 구동부 및 상기 발광 제어부를 제어하는 제어 신호들을 생성하는 구동 제어부를 포함하고,상기 구동 제어부는 저주파 구동 모드에서 상기 픽셀에 데이터를 기입하는 라이팅(writing) 프레임 동안 하이 레벨 및 로우 레벨 사이에서 스윙하는 상기 게이트 클럭 신호를 상기 게이트 구동부에 제공하고, 상기 픽셀에 기입된 데이터를 유지하는 홀딩(holing) 프레임 동안 직류 전압을 갖는 상기 게이트 클럭 신호를 상기 게이트 구동부에 제공하는 것을 특징으로 하는 표시 장치.
- 제1 항에 있어서, 상기 저주파 구동 모드에서 상기 게이트 클럭 신호는 상기 라이팅 프레임 동안 상기 하이 레벨 및 상기 로우 레벨 사이에서 스윙하고, 상기 홀딩 프레임 동안 상기 로우 레벨을 유지하는 것을 특징으로 하는 표시 장치.
- 제1 항에 있어서, 상기 저주파 구동 모드에서 상기 게이트 클럭 신호는 상기 라이팅 프레임 동안 상기 하이 레벨 및 상기 로우 레벨 사이에서 스윙하고, 상기 홀딩 프레임 동안 상기 하이 레벨을 유지하는 것을 특징으로 하는 표시 장치.
- 제1 항에 있어서, 상기 제1 타입의 스위칭 소자는 폴리 실리콘 박막 트랜지스터이고,상기 제2 타입의 스위칭 소자는 산화물 박막 트랜지스터인 것을 특징으로 하는 표시 장치.
- 제4 항에 있어서, 상기 제1 타입의 스위칭 소자는 P형 트랜지스터이고,상기 제2 타입의 스위칭 소자는 N형 트랜지스터인 것을 특징으로 하는 표시 장치.
- 제4 항에 있어서, 상기 픽셀은 제1 노드에 연결되는 게이트 전극, 제2 노드에 연결되는 제1 전극 및 제3 노드에 연결되는 제2 전극을 포함하는 제1 스위칭 소자;제1 데이터 기입 게이트 신호가 인가되는 게이트 전극, 상기 데이터 전압이 인가되는 제1 전극 및 상기 제2 노드에 연결되는 제2 전극을 포함하는 제2 스위칭 소자;제2 데이터 기입 게이트 신호가 인가되는 게이트 전극, 상기 제1 노드에 연결되는 제1 전극 및 상기 제3 노드에 연결되는 제2 노드를 포함하는 제3 스위칭 소자;데이터초기화 게이트 신호가 인가되는 게이트 전극, 초기화 전압이 인가되는 제1 전극 및 상기 제1 노드에 연결되는 제2 전극을 포함하는 제4 스위칭 소자;상기 발광 제어 신호가 인가되는 게이트 전극, 고전원 전압이 인가되는 제1 전극 및 상기 제2 노드에 연결되는 제2 전극을 포함하는 제5 스위칭 소자;상기 발광 제어 신호가 인가되는 게이트 전극, 상기 제3 노드에 연결되는 제1 전극 및 유기 발광 다이오드의 애노드 전극에 연결되는 제2 전극을 포함하는 제6 스위칭 소자;유기 발광 다이오드 초기화 게이트 신호가 인가되는 게이트 전극, 상기 초기화 전압이 인가되는 제1 전극 및 상기 유기 발광 다이오드의 상기 애노드 전극에 연결되는 제2 전극을 포함하는 제7 스위칭 소자;상기 고전원 전압이 인가되는 제1 전극 및 상기 제1 노드에 연결되는 제2 전극을 포함하는 스토리지 캐패시터; 및상기 애노드 전극 및 저전원 전압이 인가되는 캐소드 전극을 포함하는 상기 유기 발광 다이오드를 포함하는 것을 특징으로 하는 표시 장치.
- 제6 항에 있어서, 상기 제1 스위칭 소자, 상기 제2 스위칭 소자, 상기 제5 스위칭 소자 및 상기 제6 스위칭 소자는 상기 폴리 실리콘 박막 트랜지스터이고,상기 제3 스위칭 소자, 상기 제4 스위칭 소자 및 상기 제7 스위칭 소자는 상기 산화물 박막 트랜지스터인 것을 특징으로 하는 표시 장치.
- 제6 항에 있어서, 상기 저주파 구동 모드에서 상기 제2 스위칭 소자, 상기 제5 스위칭 소자 및 상기 제6 스위칭 소자를 제1 구동 주파수로 구동하고, 상기 제3 스위칭 소자를 제1 구동 주파수보다 낮은 제2 구동 주파수로 구동하는 것을 특징으로 하는 표시 장치.
- 제1 항에 있어서, 상기 구동 제어부는 상기 게이트 클럭 신호를 생성하는 게이트 제어부를 포함하는 것을 특징으로 하는 표시 장치.
- 제1 타입의 스위칭 소자 및 상기 제1 타입과 상이한 제2 타입의 스위칭 소자를 포함하는 픽셀을 포함하는 표시 패널;게이트신호를 상기 표시 패널에 제공하는 게이트 구동부;데이터전압을 상기 표시 패널에 제공하는 데이터 구동부;발광 제어 신호를 상기 표시 패널에 제공하는 발광 제어부; 및상기 게이트 구동부, 상기 데이터 구동부 및 상기 발광 제어부를 제어하는 제어 신호들을 생성하는 구동 제어부를 포함하고,상기 구동 제어부는 저주파 구동 모드에서 상기 픽셀에 데이터를 기입하는 라이팅(writing) 프레임 동안 상기 데이터 구동부를 동작시키는 아날로그 구동 전압을 상기 데이터 구동부에 제공하고, 상기 픽셀에 기입된 데이터를 유지하는 홀딩(holding) 프레임 동안 상기 데이터 구동부를 동작시키지 않는 상기 아날로그 구동 전압을 상기 데이터 구동부에 제공하는 것을 특징으로 하는 표시 장치.
- 제10 항에 있어서, 상기 저주파 구동 모드에서 상기 구동 제어부는 상기 라이팅 프레임 동안 제1 전압 레벨을 갖는 상기 아날로그 구동 전압을 상기 데이터 구동부에 제공하고, 상기 홀딩 프레임 동안 제1 전압 레벨보다 낮은 제2 전압 레벨을 갖는 상기 아날로그 구동 전압을 상기 데이터 구동부에 제공하는 것을 특징으로 하는 표시 장치.
- 제10 항에 있어서, 상기 제1 타입의 스위칭 소자는 폴리 실리콘 박막 트랜지스터이고,상기 제2 타입의 스위칭 소자는 산화물 박막 트랜지스터인 것을 특징으로 하는 표시 장치.
- 제12 항에 있어서, 상기 제1 타입의 스위칭 소자는 P형 트랜지스터이고,상기 제2 타입의 스위칭 소자는 N형 트랜지스터인 것을 특징으로 하는 표시 장치.
- 제12 항에 있어서, 상기 픽셀은 제1 노드에 연결되는 게이트 전극, 제2 노드에 연결되는 제1 전극 및 제3 노드에 연결되는 제2 전극을 포함하는 제1 스위칭 소자;제1 데이트 기입 게이트 신호가 인가되는 게이트 전극, 상기 데이터 전압이 인가되는 제1 전극 및 상기 제2 노드에 연결되는 제2 전극을 포함하는 제2 스위칭 소자;제2 데이터 기입 게이트 신호가 인가되는 게이트 전극, 상기 제1 노드에 연결되는 제1 전극 및 상기 제3 노드에 연결되는 제2 노드를 포함하는 제3 스위칭 소자;데이터초기화 게이트 신호가 인가되는 게이트 전극, 초기화 전압이 인가되는 제1 전극 및 상기 제1 노드에 연결되는 제2 전극을 포함하는 제4 스위칭 소자;상기 발광 제어 신호가 인가되는 게이트 전극, 고전원 전압이 인가되는 제1 전극 및 상기 제2 노드에 연결되는 제2 전극을 포함하는 제5 스위칭 소자;상기 발광 제어 신호가 인가되는 게이트 전극, 상기 제3 노드에 연결되는 제1 전극 및 유기 발광 다이오드의 애노드 전극에 연결되는 제2 전극을 포함하는 제6 스위칭 소자;유기 발광 다이오드 초기화 게이트 신호가 인가되는 게이트 전극, 상기 초기화 전압이 인가되는 제1 전극 및 상기 유기 발광 다이오드의 상기 애노드 전극에 연결되는 제2 전극을 포함하는 제7 스위칭 소자;상기 고전원 전압이 인가되는 제1 전극 및 상기 제1 노드에 연결되는 제2 전극을 포함하는 스토리지 캐패시터; 및상기 애노드 전극 및 저전원 전압이 인가되는 캐소드 전극을 포함하는 상기 유기 발광 다이오드를 포함하는 것을 특징으로 하는 표시 장치.
- 제14 항에 있어서, 상기 제1 스위칭 소자, 상기 제2 스위칭 소자, 상기 제5 스위칭 소자 및 상기 제6 스위칭 소자는 상기 폴리 실리콘 박막 트랜지스터이고,상기 제3 스위칭 소자, 상기 제4 스위칭 소자 및 상기 제7 스위칭 소자는 상기 산화물 박막 트랜지스터인 것을 특징으로 하는 표시 장치.
- 제14 항에 있어서, 상기 저주파 구동 모드에서 상기 제2 스위칭 소자, 상기 제5 스위칭 소자 및 상기 제6 스위칭 소자를 제1 구동 주파수로 구동하고, 상기 제3 스위칭 소자를 제1 구동 주파수보다 낮은 제2 구동 주파수로 구동하는 것을 특징으로 하는 표시 장치.
- 제14 항에 있어서, 상기 픽셀은유지 전압 인에이블 신호가 인가되는 게이트 전극, 유지 전압이 인가되는 제1 전극 및 상기 제2 스위칭 소자의 상기 제1 전극과 연결되는 제2 전극을 포함하는 제8 스위칭 소자를 더 포함하는 것을 특징으로 하는 표시 장치.
- 제17 항에 있어서, 상기 저주파 구동 모드에서 상기 구동 제어부는 상기 라이팅 프레임 동안 아날로그 구동 전압을 상기 데이터 구동부에 제공하고, 상기 홀딩 프레임 동안 유지 전압을 상기 픽셀에 제공하는 것을 특징으로 하는 표시 장치.
- 제18 항에 있어서, 상기 제8 스위칭 소자는 상기 폴리 실리콘 박막 트랜지스터인 것을 특징으로 하는 표시 장치.
- 제10 항에 있어서, 상기 구동 제어부는 상기 데이터 구동부 및 상기 픽셀에 제공되는 전압을 생성하는 전압 생성부를 포함하는 것을 특징으로 하는 표시 장치.
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| EP19863037.8A EP3855420B1 (en) | 2018-09-20 | 2019-06-28 | Display device |
| CN201980060898.2A CN112771602B (zh) | 2018-09-20 | 2019-06-28 | 显示装置 |
| US18/402,167 US12431094B2 (en) | 2018-09-20 | 2024-01-02 | Display device |
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| US18/402,167 Continuation US12431094B2 (en) | 2018-09-20 | 2024-01-02 | Display device |
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| US (2) | US11869446B2 (ko) |
| EP (1) | EP3855420B1 (ko) |
| KR (1) | KR102555125B1 (ko) |
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| WO (1) | WO2020060008A1 (ko) |
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| US12614511B2 (en) | 2020-09-25 | 2026-04-28 | Lg Display Co., Ltd. | Driving circuit and display device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| US12431094B2 (en) | 2025-09-30 |
| CN112771602B (zh) | 2025-01-07 |
| US20240233654A9 (en) | 2024-07-11 |
| KR102555125B1 (ko) | 2023-07-14 |
| EP3855420B1 (en) | 2025-09-10 |
| CN112771602A (zh) | 2021-05-07 |
| US11869446B2 (en) | 2024-01-09 |
| KR20200034086A (ko) | 2020-03-31 |
| US20210327368A1 (en) | 2021-10-21 |
| EP3855420A4 (en) | 2022-09-14 |
| US20240135888A1 (en) | 2024-04-25 |
| EP3855420A1 (en) | 2021-07-28 |
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