Compensation method and device of display panel and computer readable storage medium

Abstract

The application provides a compensation method and device of a display panel, and a computer readable storage medium, wherein the display panel comprises at least one display block to be adjusted; the compensation method comprises: obtaining actual brightness of each display block to be adjusted when the display panel displays a pure color image of a preset gray scale, and obtaining a corresponding first gray scale compensation value based on the actual brightness and a target brightness of each display block to be adjusted; determining a compensation ratio corresponding to each color based on a gamma voltage corresponding to each color under the preset gray scale and at least one remaining gray scale; for each display block to be adjusted, obtaining a final gray scale value corresponding to each color of the current display block to be adjusted based on the compensation ratio corresponding to each color, the first gray scale compensation value of the current display block to be adjusted, and the actual brightness of the current display block to be adjusted. In the above manner, the application can improve the problem of uneven brightness of the display panel.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a compensation method and device of a display panel and a computer readable storage medium. BACKGROUND

[0002] An organic light emitting diode (OLED) display panel is widely used in electronic products such as mobile phones, televisions, digital cameras, notebook computers and desktop computers due to its high image quality, power saving and thin body.

[0003] The OLED in the display panel needs to be connected to a power signal for driving light emission. Since there is resistance on the transmission line of the power signal in the existing display panel, a voltage drop (IR Drop) is generated when the driving current of the OLED flows through the transmission line. The voltage drops generated by the transmission line in different areas of the display panel are inconsistent, resulting in poor uniformity of the driving current of the OLED in different areas, and thus causing the problem of uneven brightness. SUMMARY

[0004] The present application provides a compensation method and device of a display panel and a computer readable storage medium to improve the problem of uneven brightness of the display panel.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a compensation method of a display panel, the display panel comprising at least one display block to be adjusted; the compensation method comprising: obtaining actual brightness of each display block to be adjusted when the display panel displays a pure color image of a preset gray scale, and obtaining a first gray scale compensation value of each display block to be adjusted based on the actual brightness and a target brightness of each display block to be adjusted; determining a compensation ratio of each color under the preset gray scale based on a gamma voltage corresponding to each color under the preset gray scale and at least one remaining gray scale; for each display block to be adjusted, obtaining a final gray scale value corresponding to each color of the display block to be adjusted based on the compensation ratio of each color, the first gray scale compensation value of the display block to be adjusted and the actual brightness of the display block to be adjusted.

[0006] To solve the above technical problems, another technical solution adopted by the present application is to provide a compensation device of a display panel, comprising a memory and a processor coupled with each other, and the memory and the processor cooperate with each other to realize the compensation method described in any of the above embodiments.

[0007] To solve the above technical problems, another technical solution adopted by the present application is to provide a computer readable storage medium, the computer readable storage medium storing computer execution instructions, and when the processor executes the computer execution instructions, the compensation method described in any of the above embodiments is realized.

[0008] Researchers have found that existing technologies directly convert the grayscale value corresponding to the difference between the actual brightness and the target brightness into grayscale compensation values ​​for each color. In other words, existing technologies compensate according to a preset 1:1 color ratio (e.g., a 1:1:1 RGB color ratio). However, since each sub-pixel has different color coordinates, compensation using this preset color ratio is prone to color shift. Unlike existing technologies, this application determines the compensation ratio for each color based on a preset grayscale level and the gamma voltage corresponding to each color at at least one other grayscale level. The final grayscale value for each color is determined based on this compensation ratio. Using this method not only improves the problem of uneven brightness but also reduces the degree of color coordinate shift in each sub-pixel after compensation, and can even keep the color coordinates of each sub-pixel unchanged after compensation, thus reducing color shift. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0010] Figure 1 This is a flowchart illustrating one embodiment of the compensation method for the display panel in this application;

[0011] Figure 2 for Figure 1 A flowchart of one embodiment corresponding to step S101;

[0012] Figure 3 This is a schematic diagram of one embodiment of the display panel;

[0013] Figure 4 for Figure 1 A flowchart of one embodiment corresponding to step S102;

[0014] Figure 5 for Figure 1 A flowchart of one embodiment corresponding to step S103;

[0015] Figure 6 This is a schematic diagram of one embodiment of the display panel before and after brightness compensation, corresponding to CIE-x.

[0016] Figure 7 This is a schematic diagram of one embodiment of the display panel before and after brightness compensation, corresponding to CIE-y.

[0017] Figure 8A schematic diagram of an embodiment of the display panel in Example 2 corresponding to CIE-x before and after brightness compensation;

[0018] Figure 9 A schematic diagram of an embodiment of the display panel in Example 2 corresponding to CIE-y before and after brightness compensation;

[0019] Figure 10 A schematic diagram of an embodiment of the compensation device of the display panel of the present application;

[0020] Figure 11 A schematic diagram of an embodiment of the computer readable storage medium of the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0022] Please refer to Figure 1 , Figure 1 A schematic diagram of an embodiment of the compensation method of the display panel of the present application, the compensation method of the display panel comprising:

[0023] S101: obtaining actual brightness of each to-be-adjusted display block when the display panel displays a pure color image of a preset gray scale, and obtaining a corresponding first gray scale compensation value based on the actual brightness of each to-be-adjusted display block and a target brightness.

[0024] Specifically, the pure color image can be a white color image, etc. After compensation based on the white color image, the white balance effect of the compensated display panel can be better. The preset gray scale can be 255 gray scale, etc. In other embodiments, the preset gray scale can also be any other gray scale in 0-255 gray scales, which is not limited in the present application.

[0025] Further, please refer to Figure 2 , Figure 2 A schematic diagram of an embodiment of step S101 in Figure 1 , the step S101 specifically comprising:

[0026] S201: obtaining a first gray scale corresponding to each to-be-adjusted display block based on the actual brightness, the target brightness and the preset gray scale of each to-be-adjusted display block.

[0027] Specifically, please refer to Figure 3 , Figure 3FIG. 1 shows a structural schematic diagram of an embodiment of the display panel. Before step S201, the compensation method provided in the present application can further include: dividing the display area of the display panel 1 into a plurality of display blocks 10; for example, as shown in FIG. 1, the display area of the display panel 1 can be divided into three display blocks 10; of course, in other embodiments, the display area of the display panel 1 can be divided into a number of display blocks 10, which is not limited in the present application. Figure 3

[0028] Optionally, the shapes of the plurality of display blocks 10 can be rectangular or approximately rectangular, and the sizes of the minimum circumscribed rectangles of the plurality of display blocks 10 are the same. This design can reduce the difficulty of dividing the display area.

[0029] Optionally, the plurality of display blocks 10 can be arranged in an array along the first direction X and the second direction Y perpendicular to each other. The plurality of display blocks 10 can include at least one (for example, one or at least two) display block to be adjusted 100 and one target display block 102, where the target luminance is the actual luminance of the target display block 102 when the display panel 1 displays a pure color image of a preset gray scale. Subsequently, the luminance of the display block to be adjusted 100 can be adjusted to make the luminance difference between the display block to be adjusted 100 and the target display block 102 smaller or even consistent, with the actual luminance of the target display block 102 as the target luminance. It should be noted that, on the one hand, the display block to be adjusted 100 and the target display block 102 each include a plurality of sub-pixels, and the actual luminance of the display block to be adjusted 100 and the target luminance of the target display block 102 can be the average luminance of the plurality of sub-pixels obtained by the luminance acquisition device. On the other hand, among the plurality of display blocks 10 other than the target display block 102, only part of the remaining display blocks can be the display block to be adjusted 100. For example, as shown in FIG. 1, when the number of the plurality of display blocks 10 is three, the number of the display block to be adjusted 100 can be one or two. At this time, before step S101, the method can further include: obtaining the actual luminance of the target display block and each of the remaining display blocks when the display panel displays a pure color image of a preset gray scale; and for each of the remaining display blocks, in response to the absolute value of the difference between the actual luminance of the remaining display block and the target display block exceeding a preset value, regarding the remaining display block as the display block to be adjusted. Figure 3

[0030] Preferably, the center point of the display panel 1 coincides with the center point of the target display block 102, that is, the display block 10 at the center position is selected as the target display block 102. This selection method is simple. Of course, in other embodiments, the position of the target display block 102 can also be other, which is not limited in the present application.

[0031] ​​Alternatively, in other embodiments, all the display blocks 10 are to-be-adjusted display blocks 100, i.e., none of the display blocks 10 is the target display block 102. In this case, the target luminance can be the average of the actual luminances of all the to-be-adjusted display blocks 100.

[0032] In addition, the first gray scale of each to-be-adjusted display block 100 in step S201 can be obtained based on the following formula:

[0033] wherein L x,y is the actual luminance of the to-be-adjusted display block 100, L m,n is the target luminance, Gray m,n is the preset gray scale (e.g., 255, etc.), Gray x,y is the first gray scale, and γ is the gamma parameter. Optionally, the value of γ can be 2.2, etc. The above formula for obtaining the first gray scale is simple, which can improve the calculation efficiency of the processor, and thus improve the compensation efficiency.

[0034] S202: Taking the difference between the preset gray scale and the first gray scale as the first gray scale compensation value.

[0035] Specifically, the formula is as follows: C Gray = Gray m,n - Gray x,y ; wherein C Gray is the first gray scale compensation value, Gray m,n is the preset gray scale (e.g., 255, etc.), and Gray x,y is the first gray scale of the to-be-adjusted display block 100.

[0036] It can be seen that the above process for obtaining the first gray scale compensation value is simple and has a low amount of calculation.

[0037] S102: Determining the compensation ratio of each color corresponding to the preset gray scale based on the gamma voltage corresponding to each color under the preset gray scale and at least one remaining gray scale.

[0038] Specifically, the implementation process of the step S102 can be: determining the compensation ratio of each color corresponding to the preset gray scale based on the gamma voltage of each color corresponding to the preset gray scale and the remaining gray scale. In some embodiments, the absolute value of the difference between the preset gray scale and the remaining gray scale is less than or equal to 20. For example, the difference between the preset gray scale and the remaining gray scale is 5, 10, 15, etc. In some embodiments, during the compensation process, 20-40 gray scales can be selected as gray scale binding points from 0-255 gray scales for debugging, and other gray scales can be directly interpolated using the debugging data of the gray scale binding points. Alternatively, the preset gray scale and the remaining gray scale can be two adjacent gray scale binding points. The gamma voltage value determines the brightness and chroma of the display panel, so the above method of determining the compensation ratio using the gamma voltage of the two adjacent gray scale binding points can make the difference between the color ratios before and after the brightness compensation smaller, or even make the color ratios before and after the brightness compensation unchanged, thereby reducing the color coordinate difference of the display block 100 to be adjusted before and after the brightness compensation, and reducing the degree of color deviation of the display block 100 to be adjusted after the brightness compensation.

[0039] Alternatively, the colors include a first color, a second color, and a third color; please refer to Figure 4 , Figure 4 For Figure 1 The flowchart of an embodiment corresponding to the step S102 is shown in FIG. 3. The step S102 specifically includes:

[0040] S301: obtaining a first difference value of the gamma voltage corresponding to the first color, a second difference value of the gamma voltage corresponding to the second color, and a third difference value of the gamma voltage corresponding to the third color under the preset gray scale and the remaining gray scale.

[0041] S302: defining the compensation ratio of the first color under the preset gray scale as one, defining the compensation ratio of the second color under the preset gray scale as the ratio of the second difference value to the first difference value, and defining the compensation ratio of the third color under the preset gray scale as the ratio of the third difference value to the first difference value.

[0042] The determination process of the compensation ratio is equivalent to obtaining the color ratio of the second color and the third color relative to the first color, taking the first color as a reference, and the calculation process is simple.

[0043] Alternatively, the first color is green G, the second color is red R, and the third color is blue B. The steps S301-S302 are expressed by the following formulas:

[0044]

[0045] Ratio G =1;

[0046]

[0047] Ratio R Ratio G Ratio B Ratio VgammaR VgammaG VgammaB VgammaR VgammaG VgammaB D1 D2 D3

[0048] The luminance of the green sub-pixel is strongly related to the luminance of the display panel, and the above manner of setting the compensation ratio corresponding to the green sub-pixel to 1 can make the difference between the luminance of the display block 100 after compensation and the target luminance smaller.

[0049] Of course, in other embodiments, the compensation ratio corresponding to each color can also be determined based on the gamma voltage corresponding to each color at the preset gray scale and a plurality of remaining gray scales. For example, two remaining gray scales whose difference from the preset gray scale is less than or equal to 20 can be selected; and when the preset gray scale is an intermediate gray scale, one of the two selected remaining gray scales can be greater than the intermediate gray scale, and the other can be less than the intermediate gray scale. The compensation ratio of each color corresponding to each remaining gray scale can be obtained using the above steps S301-S302; and then the mean value of the compensation ratios of the same color is output as the final ratio coefficient. In the compensation process, it is possible to increase the gray scale, and it is also possible to decrease the gray scale. The above process of determining the compensation ratio corresponding to each color can comprehensively consider the cases of increasing the gray scale and decreasing the gray scale, improve the accuracy of the compensation ratio, and improve the color uniformity of the display panel.

[0050] S103: For each display block 100 to be adjusted, based on the compensation ratio corresponding to each color, the first gray scale compensation value of the display block 100 to be adjusted, and the actual luminance of the display block 100 to be adjusted, obtain the final gray scale value corresponding to each color of the display block 100 to be adjusted.

[0051] Specifically, since each display block 10 of the display panel 1 shares the gamma voltage, the compensation ratio corresponding to each color obtained in step S102 can be uniformly applied to each display block 100 to be adjusted.

[0052] Referring to Figure 5 , Figure 5 for Figure 1 the flowchart of an embodiment corresponding to step S103 in Figure 5 , the steps in can be understood as operations performed independently for each display block 100 to be adjusted. The implementation process of the above step S103 specifically includes:

[0053] S401: obtaining a second gray scale compensation value corresponding to each color of the display block 100 to be adjusted based on the compensation ratio corresponding to each color and the first gray scale compensation value of the display block 100 to be adjusted; and obtaining an original gray scale value corresponding to each color based on the actual brightness of the display block 100 to be adjusted.

[0054] Specifically, the specific process of obtaining the second gray scale compensation value in the above step S401 can be: obtaining a first product of the compensation ratio corresponding to each color and the first gray scale compensation value of the display block 100 to be adjusted, and taking the first product as the corresponding second gray scale compensation value. For example, the obtaining process of the above second gray scale compensation value is expressed in the formula as follows:

[0055] C(R) Gray =Ratio R *C Gray ;

[0056] C(G) Gray =Ratio G *C Gray ;

[0057] C(B) Gray =Ratio B *C Gray ;

[0058] Wherein, C(R) Gray is the second gray scale compensation value corresponding to red, C(G) Gray is the second gray scale compensation value corresponding to green, C(B) Gray is the second gray scale compensation value corresponding to blue, Ratio R is the compensation ratio corresponding to red, Ratio G is the compensation ratio corresponding to green, Ratio B is the compensation ratio corresponding to blue, C Gray is the first gray scale compensation value.

[0059] The step of obtaining the original gray scale value corresponding to each color based on the actual brightness of the display block to be adjusted in step S401 includes: obtaining a sub-brightness corresponding to each color based on the actual brightness of the display block to be adjusted; and obtaining a corresponding original gray scale value based on the sub-brightness corresponding to each color. It should be noted that in other embodiments, the step of obtaining the original gray scale value corresponding to each color based on the actual brightness of the display block to be adjusted in step S401 can also be located before step S102, which is not limited in the present application.

[0060] S402: obtaining a final gray scale value based on the original gray scale value of each color of the display block to be adjusted 100 and the second gray scale compensation value of the corresponding color.

[0061] Specifically, the specific implementation process of step S402 includes: obtaining a second product of the second gray scale compensation value of each color of the display block to be adjusted 100 and the corresponding compensation multiplier, and taking the sum of the second product and the corresponding original gray scale value as the final gray scale value. Specifically, it is expressed in the formula as follows:

[0062] OUT(R) Gratt =IN(R) Gray +N R *C(R) Gray ;

[0063] OUT(G( Gray =IN(G) Gray +N G *C(G) Gray ;

[0064] OUT(B) Gray =IN(B) Gray +N B *C(B) Gray ;

[0065] wherein OUT(R) Gray is the final gray scale value corresponding to red, IN(R) Gray is the original gray scale value corresponding to red, C(R) Gray is the second gray scale compensation value corresponding to red, N R is the compensation multiplier corresponding to red; OUT(G) Gray is the final gray scale value corresponding to green, IN(G) Gray is the original gray scale value corresponding to green, C(G) Gray is the second gray scale compensation value corresponding to green, N G is the compensation multiplier corresponding to green; OUT(B) Gray is the final gray scale value corresponding to blue, IN(B) Gray is the original gray scale value corresponding to blue, C(B)Gray N is a compensation ratio corresponding to the blue color. B N is a compensation ratio corresponding to the blue color.

[0066] Optionally, the compensation ratios corresponding to the respective colors are the same, that is, N R , N G , and N B have the same magnitude. The design corresponds to a simple calculation process.

[0067] Alternatively, the values of the compensation ratios corresponding to the respective colors can be greater than 0 and less than or equal to 1.

[0068] It can be seen that in the above design, the ratio of the gray scale compensation values corresponding to the respective colors is controlled by the compensation ratio, and the degree of compensation of the gray scale compensation values corresponding to the respective colors is controlled by the compensation ratio. The entire compensation effect is good; and after one compensation, the final gray scale value after compensation can be used to drive the display panel to display a pure color image of the same preset gray scale, and when the display effect of a certain to-be-adjusted display block is not good, only the compensation ratio of the display block needs to be adjusted to reduce the difficulty of compensation.

[0069] In addition, the number of preset gray scales used in the above compensation method can be one or more; when the preset gray scale is one, the compensation results under the remaining gray scales can be obtained by linear interpolation based on the compensation result corresponding to the preset gray scale. Alternatively, when the preset gray scales are multiple, the compensation results corresponding to the respective preset gray scales can be obtained first, and then the compensation results under the remaining gray scales can be obtained by linear interpolation based on the compensation results corresponding to the multiple preset gray scales. Figure 1

[0070] The following two specific examples are used to demonstrate the compensation effect of the compensation method of the display panel provided in the present application.

[0071] Embodiment One:

[0072] The compensation method corresponding to Embodiment One is the process corresponding to steps S101-S103 in the present application; as shown in Table 1, Table 1 is a process data table of the compensation method corresponding to Embodiment One.

[0073] Table 1: Process data table of the compensation method corresponding to Embodiment One

[0074]

[0075] In Embodiment One, the display panel can display a white color image with a preset gray scale of 255, at which time Ratio R : Ratio G ​Ratio B = 1.42:1:1.54; subsequently, based on this compensation ratio, the following can be obtained respectively Figure 3 The register values ​​of the final grayscale values ​​corresponding to the R, G, and B values ​​of the two display blocks marked 100a and 100b, respectively.

[0076] like Figure 6 As shown, Figure 6 This is a schematic diagram of one embodiment of the display panel before and after brightness compensation, corresponding to CIE-x. Figure 7 This is a schematic diagram of one embodiment of the display panel before and after brightness compensation, corresponding to CIE-y. Wherein, Figure 6 and Figure 7 The horizontal axis can be understood as the position information of each sub-pixel in the display panel, and the vertical axis can be understood as the corresponding color coordinate x or color coordinate y value. From Figure 6 and Figure 7 As can be seen from the above, the compensation method provided in this application keeps the color coordinates basically the same before and after compensation, that is, it achieves the purpose of reducing color shift while compensating for brightness.

[0077] Example 2:

[0078] Example 2 can be understood as a comparative example. The difference between Example 2 and Example 1 is that Example 2 uses a preset compensation ratio, Ratio. R :Ratio G :Ratio B =1:1:1, the preset compensation ratio in Example 2 is independent of the gamma voltage.

[0079] like Figure 8 As shown, Figure 8 This is a schematic diagram of one embodiment of the display panel before and after brightness compensation, corresponding to CIE-x. Figure 9 This is a schematic diagram of one embodiment of the display panel before and after brightness compensation, corresponding to CIE-y. Wherein, Figure 8 and Figure 9 The horizontal axis can be understood as the position information of each sub-pixel in the display panel, and the vertical axis can be understood as the corresponding color coordinate x or color coordinate y value. From Figure 8 and Figure 9 As can be seen, after compensation using the preset compensation ratio, the color coordinates of some sub-pixels have shifted significantly, resulting in a color shift problem.

[0080] In summary, in one aspect, the application divides the display area of the display panel into a plurality of display blocks, and compensates each display block individually to ensure the compensation effect of display panel uniformity; in another aspect, the application determines the compensation proportion of different colors by using the gamma voltage corresponding to two gray scales, and uses the luminance of the green sub-pixel as a reference to reduce the probability of color deviation while ensuring the luminance uniformity of the display panel; in still another aspect, the compensation method is applicable to any gray scale in 0-255 gray scales to realize uniformity compensation of all gray scales.

[0081] Referring to Figure 10 , Figure 10 is a structural schematic diagram of an embodiment of the compensation device of the display panel of the application. The compensation device includes a memory 20 and a processor 22 coupled with each other, and the processor 22 cooperates with the memory 20 to realize the compensation method mentioned in any of the above embodiments. Specifically, the processor 22 can also be referred to as a CPU (Center Processing Unit). The processor 22 can be an integrated circuit chip with signal processing capability. The processor 22 can also be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor or the like. In addition, the processor 22 can be realized by integrated circuit chips together.

[0082] Referring to Figure 11 , Figure 11 is a structural schematic diagram of an embodiment of the computer readable storage medium of the application. The computer readable storage medium 30 stores computer execution instructions 300, and when the processor executes the computer execution instructions 300, the compensation method mentioned in any of the above embodiments is realized. Optionally, the computer readable storage medium 30 can include a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0083] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. A compensation method of a display panel, characterized by, The display panel comprises at least one display block to be adjusted; the compensation method comprises: obtaining actual brightness of each display block to be adjusted when the display panel displays a pure color image of a preset gray scale, and obtaining a first gray scale compensation value of each display block to be adjusted based on the actual brightness and a target brightness of each display block to be adjusted; determining a compensation ratio of each color under the preset gray scale based on a gamma voltage corresponding to each color under the preset gray scale and at least one remaining gray scale; for each display block to be adjusted, obtaining a final gray scale value corresponding to each color of the display block to be adjusted based on the compensation ratio of each color, the first gray scale compensation value of the display block to be adjusted, and the actual brightness of the display block to be adjusted; the various colors include a first color, a second color and a third color; the step of determining the compensation ratio of each color under the preset gray scale based on the gamma voltage corresponding to each color under the preset gray scale and at least one remaining gray scale comprises: obtaining a first difference value of the gamma voltage corresponding to the first color, a second difference value of the gamma voltage corresponding to the second color, and a third difference value of the gamma voltage corresponding to the third color under the preset gray scale and the remaining gray scale; defining the compensation ratio of the first color under the preset gray scale as one, defining the compensation ratio of the second color under the preset gray scale as a ratio of the second difference value to the first difference value, and defining the compensation ratio of the third color under the preset gray scale as a ratio of the third difference value to the first difference value.

2. The compensation method according to claim 1, characterized in that, the step of determining the compensation ratio of each color under the preset gray scale based on the gamma voltage corresponding to each color under the preset gray scale and at least one remaining gray scale comprises: determining the compensation ratio of each color under the preset gray scale based on the gamma voltage corresponding to each color under the preset gray scale and one remaining gray scale; wherein an absolute value of a difference between the preset gray scale and the remaining gray scale is less than or equal to 20.

3. The compensation method according to claim 2, characterized in that, the first color is green, the second color is red, and the third color is blue.

4. The compensation method of claim 1, wherein, the step of obtaining the final gray scale value corresponding to each color of the display block to be adjusted based on the compensation ratio of each color, the first gray scale compensation value of the display block to be adjusted, and the actual brightness of the display block to be adjusted comprises: obtaining a second gray scale compensation value corresponding to each color of the display block to be adjusted based on the compensation ratio of each color and the first gray scale compensation value of the display block to be adjusted; and obtaining an original gray scale value corresponding to each color based on the actual brightness of the display block to be adjusted; obtaining the final gray scale value based on the original gray scale value of each color of the display block to be adjusted and the second gray scale compensation value of the corresponding color.

5. The compensation method according to claim 4, characterized in that, the step of obtaining the second gray scale compensation value corresponding to each color of the display block to be adjusted based on the compensation ratio of each color and the first gray scale compensation value of the display block to be adjusted comprises: obtaining a first product of the compensation ratio corresponding to each color and the first gray scale compensation value of the display block to be adjusted, and taking the first product as the second gray scale compensation value corresponding to each color.

6. The compensation method according to claim 4, characterized in that, The step of obtaining the final gray scale value based on the original gray scale value of each color of the display block to be adjusted and the second gray scale compensation value of the corresponding color comprises: obtaining a second product of the second gray scale compensation value of each color of the display block to be adjusted and the corresponding compensation ratio, and taking a sum of the second product and the original gray scale value as the final gray scale value.

7. The compensation method of claim 6, wherein, the compensation ratio corresponding to each color is the same.

8. The compensation method of claim 1, wherein, The step of obtaining the first gray scale compensation value based on the actual brightness and the target brightness of each display block to be adjusted comprises: obtaining a first gray scale corresponding to each display block to be adjusted based on the actual brightness, the target brightness and the preset gray scale of each display block to be adjusted; taking a difference between the preset gray scale and the first gray scale as the first gray scale compensation value.

9. The compensation method of claim 8, wherein, the first gray scale is obtained based on the following formula: wherein L x,y is the actual luminance of the display block to be adjusted, L m,n is the target luminance, Gray m,n is the preset gray scale, Gray x,y is the first gray scale, and γ is a gamma parameter.

10. The compensation method of claim 1, wherein, the display panel further comprises a target display block, and the target brightness is an actual brightness of the target display block when the display panel displays a preset gray scale pure color image.

11. The compensation method of claim 10, wherein, a center point of the display panel coincides with a center point of the target display block.

12. A compensation device of a display panel, characterized by, The computer readable storage medium stores computer execution instructions, and when the processor executes the computer execution instructions, the compensation method of any one of claims 1-11 is implemented.

13. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer execution instructions, and when the processor executes the computer execution instructions, the compensation method of any one of claims 1-11 is implemented.

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