CN112201190A - Control method, processor, direct-current voltage element, display screen and electronic equipment - Google Patents

Control method, processor, direct-current voltage element, display screen and electronic equipment Download PDF

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Publication number
CN112201190A
CN112201190A CN202011072041.3A CN202011072041A CN112201190A CN 112201190 A CN112201190 A CN 112201190A CN 202011072041 A CN202011072041 A CN 202011072041A CN 112201190 A CN112201190 A CN 112201190A
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voltage
display
current
value
determining
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CN112201190B (en
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张健民
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Oppo Chongqing Intelligent Technology Co Ltd
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Oppo Chongqing Intelligent Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The application discloses a display control method, a processor, a direct-current voltage element, a display screen and electronic equipment. The display control method comprises the following steps: determining display current according to a picture to be displayed; determining a voltage drop value according to the display current; and determining a voltage value to be set according to the voltage drop value, sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set, and controlling the display screen to display a picture to be displayed according to the voltage value to be set. Therefore, the voltage value to be set is determined according to the voltage drop value, the voltage value of the driving voltage is adjusted to the voltage value to be set, the voltage value of the driving voltage actually applied to the pixels arranged at different positions is compensated, namely, the voltage value of the driving voltage can be adjusted according to the picture to be displayed, the driving voltage output to the display screen is consistent, and the display brightness of the display picture is uniform.

Description

Control method, processor, direct-current voltage element, display screen and electronic equipment
Technical Field
The present disclosure relates to consumer electronics, and more particularly, to a display control method, a processor, a dc voltage device, a display screen, and an electronic apparatus.
Background
In the related art, the display panel controls the light emitting elements to emit light by using the driving voltage, and ideally, the driving voltage should be uniform for each pixel. In practical situations, due to the trace resistance, the driving voltages applied to the pixels at different positions may be different, and thus, the display brightness of different areas of the display screen may be different.
Disclosure of Invention
The application provides a display control method, a processor, a direct-current voltage element, a display screen and electronic equipment.
The display control method of the embodiment of the application is used for controlling the display screen to display a picture, and is characterized in that the display screen comprises a direct-current voltage element for generating a driving voltage; the display control method comprises the following steps: determining display current according to a picture to be displayed; determining a voltage drop value according to the display current; determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set; and controlling the display screen to display the picture to be displayed according to the voltage value to be set.
The control method of the embodiment of the application is used for a direct-current voltage element in a display device, wherein the direct-current voltage element is used for generating a driving voltage; the control method comprises the following steps: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed; and adjusting the voltage value of the driving voltage to the voltage value to be set.
The processor of the embodiment of the present application is configured to communicate with a dc voltage element, the dc voltage element is configured to generate a driving voltage, and the processor is configured to: determining display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set.
The display screen of the embodiment of the application comprises a direct current voltage element and a display driving element, wherein the direct current voltage element is used for generating a driving voltage, and the display driving element is used for: determining display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set.
The direct-current voltage element of the embodiment of the application is used for generating a driving voltage; the direct voltage element is further configured to: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed; and adjusting the voltage value of the driving voltage to the voltage value to be set.
The electronic equipment of the embodiment of the application comprises a direct-current voltage element and a processor, wherein the direct-current voltage element is used for generating a driving voltage; the processor is configured to: determining display current according to a picture to be displayed; determining a voltage drop value according to the display current; determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set.
The display control method, the processor, the direct-current voltage element, the display screen and the electronic device can determine the voltage value to be set according to the voltage drop value and adjust the voltage value of the driving voltage to the voltage value to be set, so that the voltage value of the driving voltage actually applied to the pixels arranged at different positions is compensated, namely, the voltage value of the driving voltage can be adjusted according to the picture to be displayed, the driving voltages output to the display screen are consistent, and the display brightness of the display picture is uniform.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
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The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a display screen according to some embodiments of the present application;
FIG. 2 is a schematic view of an electronic device of some embodiments of the present application;
FIGS. 3-5 are schematic flow charts illustrating a display control method according to some embodiments of the present disclosure;
FIG. 6 is a histogram of gray scale distribution of a display screen according to some embodiments of the present application;
FIG. 7 is a schematic flow chart diagram of a display control method according to some embodiments of the present application;
FIG. 8 is a graph illustrating current density versus brightness according to some embodiments of the present disclosure;
FIG. 9 is a schematic flow chart diagram of a display control method according to some embodiments of the present application;
FIG. 10 is a schematic diagram of a pixel of certain embodiments of the present application;
fig. 11 and 12 are schematic flow charts of display control methods according to some embodiments of the present disclosure.
The main characteristic reference numbers:
an electronic device 100;
the display device comprises a processor 10, a display screen 20, a direct-current voltage element 21, a display driving element 22, a driving signal line 23, a pixel 24, a first sub-pixel 241, a second sub-pixel 242, a third sub-pixel 243 and a flexible circuit board 25.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1 to 3, a display control method according to an embodiment of the present disclosure is used for controlling a display screen 20 to display an image, where the display screen 20 includes a dc voltage device 21 for generating a driving voltage, and the display control method includes:
01, determining display current according to a picture to be displayed;
03, determining a voltage drop value according to the display current;
and 05, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct current voltage element 21 so that the direct current voltage element 21 adjusts the voltage value of the driving voltage to the voltage value to be set.
06, controlling the display screen 20 to display the picture to be displayed according to the voltage value to be set.
The display control method according to the embodiment of the present application may be implemented by the processor 10, wherein the steps 01, 03, 05, and 06 may all be implemented by the processor 10. That is, the processor 10 may be configured to determine a display current according to the picture to be displayed, determine a voltage drop value according to the display current, determine a voltage value to be set according to the voltage drop value, send the voltage value to be set to the dc voltage component 21 so that the dc voltage component 21 adjusts the voltage value of the driving voltage to the voltage value to be set, and control the display screen 20 to display the picture to be displayed according to the voltage value to be set.
The processor 10 may be an AP (application processor), a DDIC (display driver component), or a plug-in display processing chip (for example, a DSP chip).
The display panel 20 of the embodiment of the present application includes a dc voltage element 21 and a display driving element 22, the dc voltage element 21 is configured to generate a driving voltage, and the display driving element 22 is configured to: determining a display current according to the picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element 21; the dc voltage element 21 is used to adjust the voltage value of the driving voltage to a voltage value to be set.
The control method of the embodiment of the present application can also be implemented by the display screen 20, wherein step 01, step 03, and step 05 can all be implemented by the display driving element 22, and step 07 and step 09 can all be implemented by the dc voltage element 21.
The display driving element 22 may be referred to as a display driving chip (DDIC). It will be appreciated that during the transmission of the drive voltage to the individual pixels 24 via the display drive elements 22 and the drive signal lines 23, a significant voltage drop (i.e. a voltage drop) will occur due to the presence of the resistors.
The voltage drop will cause the driving voltage actually received by the pixel 24 to be smaller than the driving voltage provided by the dc voltage device 21, and will also cause the actual voltage of the pixel at the bottom end of the interior of the display panel 20 to be larger than the actual voltage of the pixel at the top end, resulting in the brightness and color difference of the display panel 20, which will affect the display effect.
By predicting the display current of the display panel 20 during the display of the picture, the driving voltage can be set dynamically to be constant, and the driving voltage can be compensated. The voltage value to be set is the compensated voltage value, and the dc voltage component 21 can adjust the voltage value of the driving voltage to the voltage value to be set to realize compensation, so that the picture can be refreshed to complete the display of the picture to be displayed.
Referring to fig. 4, the control method of the embodiment of the present application is applied to a dc voltage device 21 in a display device, where the dc voltage device 21 is used to generate a driving voltage; the control method comprises the following steps:
07, receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed;
09, adjusting the voltage value of the driving voltage to the voltage value to be set.
The dc voltage element 21 of the embodiment of the present application is used to generate a driving voltage; step 07 and step 09 can be implemented by the dc voltage component 21, that is, the dc voltage component 21 is further configured to: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to display current, and the display current is determined according to a picture to be displayed; and adjusting the voltage value of the driving voltage to be a voltage value to be set.
The dc voltage element 21 may be a DCDC chip, and the dc voltage element 21 generates a driving voltage to supply power to each pixel 24. The driving signal lines 23 are disposed inside the display panel 20 in a mesh shape, and the plurality of pixels 24 are respectively connected to the driving signal lines 23, so that the pixels 24 can receive the driving voltage generated by the dc voltage element 21.
In this way, the voltage value to be set is determined according to the voltage drop value and the voltage value of the driving voltage is adjusted to the voltage value to be set, so that the voltage value of the driving voltage actually applied to the pixels arranged at different positions is compensated, that is, the voltage value of the driving voltage can be adjusted according to the picture to be displayed, so that the driving voltage output to the display screen 20 is consistent, and the display brightness of the display picture is uniform. In addition, since the driving voltage is generated by the dc circuit element, the adjustment of the driving voltage by the dc voltage element 21 is more direct than the adjustment of the driving voltage by other components such as the display driving element 22, and the adjusted driving voltage can be made more accurate.
Referring to fig. 5, in some embodiments, step 01 includes:
011, acquiring a gray scale distribution histogram of a picture to be displayed;
012, the display current is determined by the gray-scale distribution histogram and the deposition area of the light-emitting element of the pixel.
In some embodiments, step 011 and step 012 can be implemented by processor 10, that is, processor 10 can be configured to obtain a histogram of gray scale distribution of a picture to be displayed; and determining the display current according to the gray-scale distribution histogram and the evaporation area of the light-emitting element of the pixel.
In some embodiments, step 011 and step 012 can be implemented by the display driving element 22, that is, the display driving element 22 can be used to obtain a histogram of gray scale distribution of a picture to be displayed; and determining the display current according to the gray-scale distribution histogram and the evaporation area of the light-emitting element of the pixel.
The gray scale is the brightness change of the picture to be displayed between the brightest and darkest, and is divided into a plurality of parts, and each gray scale value range is called as a gray scale. The gray-scale distribution histogram is a statistical graph in which the horizontal axis represents gray-scale values and the vertical axis represents appearance probabilities, and the appearance probabilities of the respective gray-scale values are displayed. The display current can be determined by the current density corresponding to the gray scale, the evaporation area of the light-emitting element and the occurrence probability.
For example, in one embodiment, the display driver 22 processes a picture, which is a display screen with a resolution of 480 × 240, and obtains a gray level histogram by performing a decomposition count for each pixel (total number of pixels is 480 × 240 — 115200) as shown in fig. 6, wherein the gray level range is 0 to 255.
It can be understood that the obtaining of the gray-scale distribution histogram can be implemented in an AP (application processor), a DDIC (display driver element), or a plug-in display processing chip (such as a DSP chip).
Therefore, the occurrence probability corresponding to each gray scale of each pixel can be intuitively obtained through the gray scale distribution histogram, and the display current is determined.
Referring to fig. 7, in some embodiments, step 012 includes:
0121, determining each gray scale and corresponding occurrence probability according to the gray scale distribution histogram;
0122, determining corresponding brightness according to each gray scale;
0123, determining the corresponding current density according to the brightness;
0124, determining the display current according to the current density, the evaporation area and the occurrence probability of the light-emitting element corresponding to all the gray scales.
In some embodiments, steps 0121, 0122, 0123, and 0124 may all be implemented by the processor 10, that is, the processor 10 may be configured to determine each gray level and the corresponding occurrence probability according to the gray level distribution histogram; determining corresponding brightness according to each gray scale; determining corresponding current density according to the brightness; and determining the display current according to the current density, the evaporation area and the occurrence probability of the light-emitting elements corresponding to all the gray scales.
In some embodiments, steps 0121, 0122, 0123, and 0124 may all be implemented by the display driving element 22, that is, the display driving element 22 may be configured to determine each gray level and the corresponding occurrence probability according to the gray level distribution histogram; determining corresponding brightness according to each gray scale; determining corresponding current density according to the brightness; and determining the display current according to the current density, the evaporation area and the occurrence probability of the light-emitting elements corresponding to all the gray scales.
Specifically, each gray level corresponds to a luminance, and each luminance corresponds to a current density. The correspondence between current density and luminance is shown in fig. 8, where the horizontal axis represents current density and the vertical axis represents luminance.
In some embodiments, the correspondence between current density and brightness may be obtained from actual detection of each display screen 20. By obtaining the corresponding relationship between the current density and the brightness in this way, individual differences caused by different parameters of the display screen 20 can be avoided.
Thus, the difference between the display panels 20 can be eliminated, and the accuracy of voltage compensation can be increased.
Referring to fig. 9, in some embodiments, each pixel 24 includes a first sub-pixel 241, a second sub-pixel 242, and a third sub-pixel 243, and step 0124 includes:
01241, determining a first display current according to the current density corresponding to all gray scales of the first sub-pixel 241, the evaporation area of the light emitting element of the first sub-pixel 241, and the occurrence probability;
01242, determining a second display current according to the current density corresponding to all gray scales of the second sub-pixel 242, the evaporation area of the light emitting element of the second sub-pixel 242, and the occurrence probability;
01243, determining a third display current according to the current density corresponding to all gray scales of the third sub-pixel 243, the evaporation area of the light emitting element of the third sub-pixel 243, and the occurrence probability;
01244, determining the display current based on the first display current, the second display current and the third display current.
In some embodiments, steps 01241, 01242, 01243, and 01244 may be implemented by the processor 10, that is, the processor 10 may be configured to determine the first display current according to the current densities corresponding to all gray scales of the first sub-pixel 241, the evaporation area of the light emitting element of the first sub-pixel 241, and the probability of occurrence; determining a second display current according to the current densities corresponding to all gray scales of the second sub-pixel 242, the evaporation area of the light-emitting element of the second sub-pixel 242, and the occurrence probability; determining a third display current according to the current densities corresponding to all gray scales of the third subpixel 243, the evaporation area of the light-emitting element of the third subpixel 243, and the occurrence probability; and determining the display current according to the first display current, the second display current and the third display current.
In some embodiments, steps 01241, 01242, 01243, and 01244 can be implemented by the display driving element 22, that is, the display driving element 22 can be used to determine the first display current according to the current density corresponding to all gray scales of the first sub-pixel 241, the evaporation area of the light emitting element of the first sub-pixel 241, and the probability of occurrence; determining a second display current according to the current densities corresponding to all gray scales of the second sub-pixel 242, the evaporation area of the light-emitting element of the second sub-pixel 242, and the occurrence probability; determining a third display current according to the current densities corresponding to all gray scales of the third subpixel 243, the evaporation area of the light-emitting element of the third subpixel 243, and the occurrence probability; and determining the display current according to the first display current, the second display current and the third display current.
Specifically, there is the formula:
I＝∑(I1*S1*n1)+∑(I2*S2*n2)+∑(I3*S3*n3)
where I is a display current, I1 is a first current density, I2 is a second current density, I3 is a third current density, S1 is a deposition area of a light emitting element of the first sub-pixel 241, n1 is an occurrence probability of each gray scale of the first sub-pixel 241, S2 is a deposition area of a light emitting element of the second sub-pixel 242, n2 is an occurrence probability of each gray scale of the second sub-pixel 242, S3 is a deposition area of a light emitting element of the third sub-pixel 243, and n3 is an occurrence probability of each gray scale of the third sub-pixel 243. The first current density, the second current density, and the third current density may be obtained from a correspondence relationship between the current density and the luminance.
The first sub-pixel 241 corresponds to a first display current, the second sub-pixel 242 corresponds to a second display current, and the third sub-pixel 243 corresponds to a third display current, so the display current is the sum of the first display current, the second display current, and the third display current.
Therefore, after the current density, the evaporation area of the light-emitting element of the sub-pixel and the occurrence probability are obtained, the display current can be obtained by calculating the sum of the currents of different gray scales of all the sub-pixels.
In some embodiments, the evaporation area of the light emitting element of the first sub-pixel 241 is determined according to the aperture ratio of the first sub-pixel 241 and the total area of the first sub-pixel 241, the evaporation area of the light emitting element of the second sub-pixel 242 is determined according to the aperture ratio of the second sub-pixel 242 and the total area of the second sub-pixel 242, and the evaporation area of the light emitting element of the third sub-pixel 243 is determined according to the aperture ratio of the third sub-pixel 243 and the total area of the third sub-pixel 243.
Specifically, the evaporation area of the light emitting element of the sub-pixel can be calculated by the following formula:
S＝G*Sa
S1＝G1*Sa1，S2＝G2*Sa2，S3＝G3*Sa3
referring to fig. 10, S is a light emitting element vapor deposition area, G is an aperture ratio of the sub-pixel, Sa is a total area of the sub-pixels, S1 is a light emitting element vapor deposition area of the first sub-pixel 241, G1 is an aperture ratio of the first sub-pixel 241, Sa1 is a total area of the first sub-pixel 241, S2 is a light emitting element vapor deposition area of the second sub-pixel 242, G2 is an aperture ratio of the second sub-pixel 242, Sa2 is a total area of the second sub-pixel 242, S3 is a light emitting element vapor deposition area of the third sub-pixel 243, G3 is an aperture ratio of the third sub-pixel 243, and Sa3 is a total area of the third sub-pixel 243.
In this way, the evaporation area of the light-emitting element of the sub-pixel can be calculated by multiplying the aperture ratio of the sub-pixel and the total area of the sub-pixels.
In some embodiments, the display screen 20 stores a corresponding relationship between the display current and the voltage drop value, and the step 01 further includes:
013, determining the voltage drop value according to the display current and the corresponding relation.
In some embodiments, the display panel 20 stores a corresponding relationship between the display current and the voltage drop value, and step 013 can be implemented by the display driving element 22, that is, the display driving element 22 can be used to determine the voltage drop value according to the display current and the corresponding relationship.
The corresponding relation between the display current and the voltage drop value is Δ U ═ I × R, where Δ U is the voltage drop value, I is the display current, and R is the total resistance of the elements of the display screen 20.
When the display screen 20 displays different pictures, the voltage drop value Δ U is different due to different currents passing through the display screen 20, and therefore the voltage drop value Δ U can be determined according to the display current I and the corresponding relation.
It will be appreciated that in some embodiments, the display screen 20 may include a memory (memory bank, memory chip, various logic components or control circuits, etc.) in which the correspondence between the display current and the voltage drop value may be stored.
Thus, the voltage drop value can be determined by the corresponding relationship stored in the display screen 20 after the display current is obtained.
In some embodiments, the driving voltage is transmitted to each pixel 24 through the display driving element 22 and the driving signal line 23; the driving signal line 23 has a first resistance, the display driving element 22 has a second resistance, and the step 01 further includes:
014, determining a voltage drop value according to the display current, the first resistance and the second resistance.
In some embodiments, step 014 may be implemented by processor 10, i.e., processor 10 may be configured to determine a voltage droop value based on the display current, the first resistance and the second resistance.
In some embodiments, step 014 may be implemented by display driving element 22, i.e., display driving element 22 may be configured to determine a voltage droop value based on the display current, the first resistance and the second resistance.
The corresponding relation among the display current, the first resistor, the second resistor and the voltage drop value is R1+ R2, and Δ U I R I (R1+ R2), wherein Δ U is the voltage drop value, I is the display current, R is the total resistance of elements of the display screen 2020, R1 is the first resistor, and R2 is the second resistor.
Wherein the first resistor R1 of the driving signal line 23 and the second resistor R2 of the display driving element 22 can be obtained by software or hardware tests.
Therefore, the first resistance value and the second resistance value can be obtained through software or hardware testing, and the voltage drop value can be accurately determined according to the display current value and the corresponding relation.
In some embodiments, the driving voltage is transmitted to each pixel through the flexible circuit board 25, the display driving element 22 and the driving signal line 23, the flexible circuit board 25 has a third resistance, and the step 014 further includes:
0141, determining a voltage drop value according to the display current, the first resistor, the second resistor and the third resistor.
In some embodiments, step 0141 may be implemented by processor 10, i.e., processor 10 may be configured to determine a voltage droop value based on the display current, the first resistance, the second resistance, and the third resistance.
In some embodiments, step 0141 may be implemented by display driving element 22, i.e., display driving element 22 may be used to determine a voltage drop value according to the display current, the first resistance, the second resistance and the third resistance.
The corresponding relation among the display current, the first resistor, the second resistor, the third resistor and the voltage drop value is R1+ R2+ R3, and Δ U I R I (R1+ R2+ R3), wherein Δ U is the voltage drop value, I is the display current, R is the total resistance of elements of the display screen 20, R1 is the first resistor, R2 is the second resistor, and R3 is the third resistor.
The first resistor, the second resistor and the third resistor of the flexible circuit board 25 can be detected in advance.
As such, the display driving element 22 may determine the voltage drop value according to the display current, the first resistance, the second resistance, and the third resistance.
Referring to fig. 11, in some embodiments, step 05 includes:
051 sending a predetermined number of pulses corresponding to the voltage value to be set to the DC voltage component 21 to make the DC voltage component
21 determine the voltage value to be set.
In some embodiments, step 051 may be implemented by the processor 10, that is, the processor 10 may be configured to send a preset number of pulses corresponding to the voltage value to be set to the dc voltage component 21 so that the dc voltage component 21 determines the voltage value to be set.
In some embodiments, step 051 may be implemented by the display driving element 22, that is, the display driving element 22 may be configured to send a preset number of pulses corresponding to the voltage value to be set to the dc voltage element 21 so that the dc voltage element 21 determines the voltage value to be set.
Referring to fig. 12, in some embodiments, step 07 includes:
071, receiving a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
In some embodiments, step 071 may be implemented by the dc voltage component 21, that is, the dc voltage component 21 may be configured to receive a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
The dc voltage component 21 generates the driving voltage after receiving the pulse, and different voltage values to be set may be set correspondingly when receiving different pulse numbers, for example, the larger the pulse number, the higher the voltage value to be set is.
In one embodiment, after determining a voltage value to be set, the display driver component 22 sends x pulses to the dc voltage component 21, and the dc voltage component 21 receives the pulses and determines the voltage value to be set. If a higher voltage value to be set is determined, the display driving element 22 sends y pulses to the dc voltage element 21, where y is greater than x.
Referring to fig. 2 again, the electronic device 100 of the embodiment of the present disclosure includes a display panel 20 and a processor 10, where the display panel 20 includes a dc voltage element 21, and the dc voltage element 21 is used to generate a driving voltage; the processor 10 is configured to: determining display current according to a picture to be displayed; determining a voltage drop value according to the display current; determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the direct-current voltage element 21; the dc voltage component 21 is configured to adjust a voltage value of the driving voltage to a voltage value to be set, and control the display panel 20 to display a picture to be displayed according to the voltage value to be set.
It is understood that the electronic device 100 includes, but is not limited to, a cell phone, a tablet computer, a head-up display device, and the like.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. It should be understood that portions of the embodiments of the present application may be implemented in hardware, software, firmware, or a combination thereof.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in an electronic device readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in an electronic device readable storage medium.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.

Claims (18)

1. A display control method is used for controlling a display screen to display pictures, and is characterized in that the display screen comprises a direct-current voltage element used for generating a driving voltage; the display control method comprises the following steps:
determining display current according to a picture to be displayed;
determining a voltage drop value according to the display current;
determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set;
and controlling the display screen to display the picture to be displayed according to the voltage value to be set.
2. The display control method according to claim 1, wherein the determining a display current according to the picture to be displayed includes:
acquiring a gray scale distribution histogram of the picture to be displayed;
and determining the display current according to the gray scale distribution histogram and the evaporation area of the light-emitting element of the pixel.
3. The method according to claim 2, wherein the determining the display current based on the gray-scale distribution histogram and a light-emitting element evaporation area of the pixel includes:
determining each gray scale and the corresponding occurrence probability according to the gray scale distribution histogram;
determining corresponding brightness according to each gray scale;
determining corresponding current density according to the brightness;
and determining the display current according to the current density, the evaporation area of the light-emitting element and the occurrence probability corresponding to all the gray scales.
4. The method according to claim 3, wherein each of the pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the determining the display current according to the current density, the evaporation area of the light emitting element, and the occurrence probability corresponding to all the gray levels includes:
determining a first display current according to the current densities corresponding to all the gray scales of the first sub-pixel, the evaporation area of the light-emitting element of the first sub-pixel and the occurrence probability;
determining a second display current according to the current densities corresponding to all the gray scales of the second sub-pixel, the evaporation area of the light-emitting element of the second sub-pixel and the occurrence probability;
determining a third display current according to the current densities corresponding to all the gray scales of the third sub-pixel, the evaporation area of the light-emitting element of the third sub-pixel and the occurrence probability;
determining the display current according to the first display current, the second display current and the third display current.
5. The display control method according to claim 4, wherein the light-emitting element evaporation area of the first sub-pixel is determined based on the aperture ratio of the first sub-pixel and the total area of the first sub-pixels, the light-emitting element evaporation area of the second sub-pixel is determined based on the aperture ratio of the second sub-pixel and the total area of the second sub-pixels, and the light-emitting element evaporation area of the third sub-pixel is determined based on the aperture ratio of the third sub-pixel and the total area of the third sub-pixels.
6. The display control method according to claim 1, wherein the display screen stores a correspondence between the display current and the voltage drop value, and the determining the display current according to the picture to be displayed includes:
and determining the voltage reduction value according to the display current and the corresponding relation.
7. The display control method according to claim 1, wherein the drive voltage is transmitted to each pixel through a display drive element and a drive signal line; the driving signal line has a first resistance, the display driving element has a second resistance, and the determining of the display current according to the picture to be displayed includes:
determining the voltage drop value according to the display current, the first resistance and the second resistance.
8. The method according to claim 1, wherein the determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the dc voltage element to cause the dc voltage element to adjust the voltage value of the driving voltage to the voltage value to be set includes:
sending a preset number of pulses corresponding to the voltage value to be set to the direct-current voltage element so that the direct-current voltage element determines the voltage value to be set.
9. A control method, characterized by a direct voltage element for use in a display device, the direct voltage element being for generating a drive voltage; the control method comprises the following steps:
receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed;
and adjusting the voltage value of the driving voltage to the voltage value to be set.
10. The control method according to claim 9, wherein the receiving a voltage value to be set includes:
receiving a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
11. A processor, in communication with a direct current voltage element, the direct current voltage element to generate a drive voltage, the processor to: determining display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set.
12. A display panel, comprising a dc voltage component and a display driving component, wherein the dc voltage component is configured to generate a driving voltage, and wherein the display driving component is configured to: determining display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set.
13. A display screen according to claim 12, wherein the display screen comprises a plurality of pixels, and the display drive element is configured to: acquiring a gray scale distribution histogram of the picture to be displayed; and determining the display current according to the gray scale distribution histogram and the evaporation area of the light-emitting element of the pixel.
14. A display screen according to claim 12, wherein the drive voltage is transmitted to each pixel via a display drive element and a drive signal line; the drive signal line has a first resistance, the display drive element has a second resistance, the display drive element is further configured to: determining the voltage drop value according to the display current, the first resistance and the second resistance.
15. A display screen in accordance with claim 12, wherein the display driving element is further configured to: sending a preset number of pulses corresponding to the voltage value to be set to the direct-current voltage element so that the direct-current voltage element determines the voltage value to be set.
16. A dc voltage element, wherein the dc voltage element is configured to generate a driving voltage; the direct voltage element is further configured to: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed; and adjusting the voltage value of the driving voltage to the voltage value to be set.
17. The dc voltage component of claim 16, wherein the dc voltage component is configured to receive a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
18. An electronic device, comprising a direct voltage component for generating a driving voltage and a processor; the processor is configured to: determining display current according to a picture to be displayed; determining a voltage drop value according to the display current; determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set.
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