Gray scale compensation method and device of display panel and display panel

Abstract

Embodiments of the present application provide a gray scale compensation method and device for a display panel and the display panel. First, initial gray scale values of each pixel in a current frame picture and an initial gray scale compensation coefficient set are obtained. Second, based on the initial gray scale values of each pixel, a current voltage drop characteristic value of each first pixel is determined. Finally, based on the current voltage drop characteristic value and the initial gray scale compensation coefficient set, a first gray scale compensation coefficient of each first pixel is determined, and a second gray scale compensation coefficient of each second pixel is determined according to the first gray scale compensation coefficient. In this way, by using the first gray scale compensation coefficient to compensate the initial gray scale value of the corresponding first pixel and using the second gray scale compensation coefficient to compensate the initial gray scale value of the corresponding second pixel, the brightness non-uniformity of the display panel caused by voltage drop when displaying the current frame picture can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a grayscale compensation method, apparatus and display panel for a display panel. Background Technology

[0002] With the rapid development of display technology, larger display panels or those with higher operating current have gradually become mainstream products in the market. However, for larger display panels or those with higher operating current, uneven brightness over large areas often occurs when displaying images. Summary of the Invention

[0003] In view of this, embodiments of this application provide a grayscale compensation method, apparatus and display panel for a display panel, so as to improve the problem of uneven brightness of the display panel.

[0004] In a first aspect, embodiments of this application provide a grayscale compensation method for a display panel, wherein the display area of ​​the display panel includes multiple display partitions, each display partition includes multiple pixels, the pixel at the vertex of the display partition is defined as a first pixel, and the remaining pixels are defined as second pixels; the grayscale compensation method includes:

[0005] For the current frame of the display panel to be displayed, obtain the initial grayscale value of each pixel in the current frame;

[0006] An initial grayscale compensation coefficient set is obtained, which includes an initial voltage drop feature value for each first pixel and an initial grayscale compensation coefficient corresponding to the initial voltage drop feature value. The initial voltage drop feature value represents the voltage drop effect on the target display signal received by the first pixel when the display panel displays the target image.

[0007] Based on the initial grayscale value of each pixel, a current voltage drop characteristic value is determined for each first pixel; wherein, the current voltage drop characteristic value represents the voltage drop impact on the current display signal received by the first pixel when the display panel displays the current frame;

[0008] Based on the current voltage drop feature value of each first pixel and the initial gray level compensation coefficient set, a first gray level compensation coefficient for each first pixel is determined, and a second gray level compensation coefficient for each second pixel is determined based on the first gray level compensation coefficient.

[0009] Secondly, embodiments of this application also provide a grayscale compensation device for a display panel, wherein the display area of ​​the display panel includes multiple display partitions, each display partition includes multiple pixels, the pixel at the vertex of the display partition is defined as a first pixel, and the remaining pixels are defined as second pixels; the grayscale compensation device includes:

[0010] The first acquisition unit is configured to acquire the initial grayscale value of each pixel in the current frame of the display panel to be displayed.

[0011] The second acquisition unit is configured to acquire an initial grayscale compensation coefficient set, which includes an initial voltage drop feature value for each first pixel and an initial grayscale compensation coefficient corresponding to the initial voltage drop feature value. The initial voltage drop feature value represents the voltage drop effect on the target display signal received by the first pixel when the display panel displays the target image.

[0012] The first determining unit is configured to determine the current voltage drop feature value of each first pixel based on the initial grayscale value of each pixel; wherein the current voltage drop feature value represents the voltage drop effect on the current display signal received by the first pixel when the display panel displays the current frame image;

[0013] The second determining unit is configured to determine a first grayscale compensation coefficient for each first pixel based on the current voltage drop feature value of each first pixel and the initial grayscale compensation coefficient set, and to determine a second grayscale compensation coefficient for each second pixel based on the first grayscale compensation coefficient.

[0014] Thirdly, embodiments of this application also provide a display panel, the display panel including a memory and a processor; the memory stores a computer program, and the processor is used to run the computer program in the memory to perform the steps in the grayscale compensation method of the display panel described above.

[0015] Fourthly, embodiments of this application also provide a storage medium storing a computer program, which is loaded by a processor to execute the steps in the grayscale compensation method for a display panel described above.

[0016] In some embodiments of the grayscale compensation method, apparatus, and display panel of this application, the initial grayscale value and initial grayscale compensation coefficient set of each pixel in the current frame are first obtained. Secondly, based on the initial grayscale value of each pixel, the current voltage drop characteristic value of each first pixel is determined to calculate in real time the voltage drop impact on the current display signal received by each first pixel. Finally, based on the current voltage drop characteristic value and the initial grayscale compensation coefficient set, a first grayscale compensation coefficient for each first pixel is determined, and a second grayscale compensation coefficient for each second pixel is determined based on the first grayscale compensation coefficient. Thus, by using the first grayscale compensation coefficient to compensate the initial grayscale value of the corresponding first pixel and using the second grayscale compensation coefficient to compensate the initial grayscale value of the corresponding second pixel, the brightness unevenness caused by voltage drop when displaying the current frame can be improved. Attached Figure Description

[0017] Figure 1 A schematic diagram illustrating an application scenario of the grayscale compensation method for a display panel provided in this application embodiment;

[0018] Figure 2 A schematic diagram of a structure of multiple display zones of a display panel provided in an embodiment of this application;

[0019] Figure 3 A schematic flowchart of a grayscale compensation method for a display panel provided in an embodiment of this application;

[0020] Figure 4 A schematic diagram of a structure of multiple grayscale statistical partitions of a display panel provided in an embodiment of this application;

[0021] Figure 5 This application provides a relationship curve between the first initial voltage drop characteristic value and the first initial grayscale compensation coefficient in the first initial grayscale compensation coefficient set.

[0022] Figure 6 Provided for the embodiments of this application Figure 3 A flowchart of step S130;

[0023] Figure 7 Provided for the embodiments of this application Figure 3 A flowchart of step S140;

[0024] Figure 8 This is a block diagram of a grayscale compensation device for a display panel provided in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100. Display panel;

[0027] 11. Display panel body; 11A. Display area; 11B. Display partition; 11C. Grayscale statistics partition; 111. Power signal line; 12. Timing controller; 121. Grayscale compensation device; 122. First acquisition unit; 123. Second acquisition unit; 124. First determination unit; 125. Second determination unit; 13. Source driving circuit; 14. Gate driving circuit; 15. Power management circuit;

[0028] 21. Pixel; 22. 22A. First pixel; 23. Second pixel; 211. First sub-pixel; 212. Second sub-pixel; 213. Third sub-pixel; 24. Reference pixel;

[0029] X, the first direction; Y, the second direction. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] This application provides a grayscale compensation method for a display panel. The display panel can be, but is not limited to, an organic light-emitting diode (OLED) display panel, a liquid crystal display panel, a quantum dot display panel, a micro-LED display panel, or a mini-LED display panel.

[0032] The display panel includes a computer-readable storage medium that runs the grayscale compensation method, enabling the execution of the grayscale compensation method's steps. The display panel can be applied to terminals with display capabilities, such as mobile phones, tablets, desktop computers, e-readers, electronic display screens, laptops, media players, wearable devices, digital cameras, and car navigation systems.

[0033] Figure 1 This is a schematic diagram illustrating an application scenario of the grayscale compensation method for a display panel provided in an embodiment of this application.

[0034] like Figure 1 As shown, as an example, the display panel 100 includes a display panel body 11, a timing controller 12, a source drive circuit 13, a gate drive circuit 14, and a power management circuit 15.

[0035] The display panel body 11 includes a plurality of pixels 21, which are arranged in an array along a first direction X and a second direction Y. Each pixel 21 may include one or more sub-pixels. Each sub-pixel may include a liquid crystal display device, an organic light-emitting diode, a micro light-emitting diode, a quantum dot light-emitting diode, or a sub-millimeter light-emitting diode, etc. For example, each sub-pixel may include a micro light-emitting diode. The first direction X intersects the second direction Y. For example, the first direction X is perpendicular to the second direction Y.

[0036] It should be noted that the multiple pixels 21 are divided into multiple columns of pixels along the first direction X and into multiple rows of pixels along the second direction Y.

[0037] In some embodiments, each pixel 21 may include a first sub-pixel 211, a second sub-pixel 212, and a third sub-pixel 213, which are respectively configured to emit three different colors of light. For example, the first sub-pixel 211, the second sub-pixel 212, and the third sub-pixel 213 may emit red light, green light, and blue light, respectively.

[0038] like Figure 1 As shown, the display panel body 11 also includes multiple scan lines (not shown in the figure), multiple data lines (not shown in the figure), and multiple power signal lines 111. The multiple scan lines intersect the multiple data lines insulatedly. The multiple power signal lines 111 are insulated from the multiple scan lines and the multiple data lines. In some embodiments, the multiple power signal lines may extend in one direction. In other embodiments, the multiple power signal lines may extend in two directions respectively (e.g., a first direction X and a second direction Y) and form a mesh structure.

[0039] The timing controller 12 is connected to the display panel body 11, the source drive circuit 13, and the gate drive circuit 14. The timing controller 12 is configured to receive image data and control signals. It performs preprocessing on the image data, such as format conversion and data sorting, to obtain a data signal. Furthermore, the timing controller 12 generates a gate control signal, a source control signal, and a clock signal. Then, it sends the data signal, gate control signal, source control signal, and clock signal to the source drive circuit 13 and the gate drive circuit 14, respectively.

[0040] The gate drive circuit 14 receives the gate control signal and clock signal from the timing controller 12 to generate the gate drive signal for line-by-line scanning. The gate drive signal sequentially turns the thin-film transistor switches in the display area on or off to control the selection of the scan lines.

[0041] After receiving the data signal and source control signal from the timing controller 12, the source drive circuit 13 stores the data signal in the internal register and outputs the data signal synchronously to the data line according to the scan signal of the gate drive circuit 14.

[0042] The power management circuit 15 is connected to the timing controller 12, the source drive circuit 13, and the gate drive circuit 14 to provide a corresponding operating voltage for each. Furthermore, the power management circuit 15 is also connected to the display panel body 11 via the source drive circuit 13 to output power signals to multiple power signal lines to drive the pixels 21 to emit light. The power signals may include at least one of a first power signal and a second power signal. The first power signal may include a VDD signal that provides a positive voltage to the display panel. The second power signal may include a VSS signal that provides a reference ground voltage to the display panel.

[0043] Normally, such as Figure 1 As shown, the source drive circuit 13 is disposed on one side of the display panel body 11, and the distance between it and the pixels 21 in different rows is different. The greater the distance between the pixel 21 and the source drive circuit 13, the greater the voltage drop (IR-Drop) of the power signal during transmission due to the impedance of the power signal line, resulting in a larger difference between the actual value of the power signal received by the pixel 21 and the initial value of the power signal output by the source drive circuit 13. Furthermore, since the actual value of the power signal received by the pixel 21 deviates from the initial value of the power signal output by the source drive circuit 13, if the pixel feature values ​​such as grayscale of the pixel 21 are not compensated, the display panel 100 may exhibit uneven brightness when displaying images.

[0044] Figure 2 This is a schematic diagram of multiple display zones of a display panel provided in an embodiment of this application.

[0045] like Figure 2 As shown, the display area 11A of the display panel 100 includes multiple display partitions 11B, which are arranged in an array along the first direction X and the second direction Y.

[0046] Each display partition 11B has multiple pixels 21. The pixel 21 at the vertex of each display partition 11B is defined as the first pixel 22, and the remaining pixels 21 are defined as the second pixel 23. Therefore, when it is necessary to compensate for pixel feature values ​​such as grayscale values ​​of pixels 21 in each display partition 11B, the compensation coefficients for the smaller number of first pixels 22 in each display partition 11B can be determined first. Then, based on the compensation coefficients of the smaller number of first pixels 22, the compensation coefficients for each second pixel 23 in each display partition 11B can be determined, thus simplifying the calculation process for the compensation coefficients of multiple pixels 21.

[0047] In some embodiments, such as Figure 2 As shown, the shape of each display partition 11B may include, but is not limited to, a rectangle. Therefore, the four pixels 21 at the four vertices of each display partition 11B are all first pixels 22, and the remaining pixels 21 are all second pixels 23.

[0048] It should be noted that, Figure 2 It only shows one second pixel 23, but in reality, there are multiple second pixels 23 in partition 11B.

[0049] In some embodiments, the total number of display partitions 11B can be M*N, and correspondingly, the total number of first pixels 22 can be (M+1)*(N+1). M represents the number of columns of display partition 11B along the first direction X, and N represents the number of rows of display partition 11B along the second direction Y.

[0050] The total number of display zones 11B can be set according to the resolution of the display panel 100 and the overall brightness unevenness. In some embodiments, the total number of display zones 11B can be 5 to 33, in order to improve the brightness unevenness of the display panel 100 and simplify the zone compensation process. Figure 2 The diagram shows 16 display partitions 11B, but it is not limited to these.

[0051] Figure 3 This is a schematic flowchart illustrating a grayscale compensation method for a display panel provided in an embodiment of this application. Figure 3 As shown, the grayscale compensation method includes steps S110 to S140 to improve the uneven brightness caused by voltage drop when the display panel displays the current frame. Steps S110 to S140 are described in detail below.

[0052] Step S110: For the current frame of the image to be displayed on the display panel 100, obtain the initial grayscale value of each pixel 21 in the current frame.

[0053] In some embodiments, the initial grayscale value can range from 0 to 1. In other embodiments, the initial grayscale value can range from 0 to 255. Here, 0 represents pure black, and 1 and 255 represent pure white.

[0054] For example, when pixel 21 includes first sub-pixels 211 to third sub-pixels 213, the initial grayscale value of each pixel 21 includes the initial grayscale values ​​of the first sub-pixels 211 to third sub-pixels 213.

[0055] It should be noted that for each pixel 21, the position data of the first sub-pixel 211 to the third sub-pixel 213 in the display panel body 11 are the same. Specifically, the position data of the sub-pixels of each pixel is determined by the row and column of that pixel in the display panel body 11.

[0056] Step S120: Obtain the initial grayscale compensation coefficient set. The initial grayscale compensation coefficient set includes the initial voltage drop feature value of each first pixel and the initial grayscale compensation coefficient corresponding to the initial voltage drop feature value. The initial voltage drop feature value represents the voltage drop effect on the target display signal received by the corresponding first pixel when the display panel displays the target image.

[0057] In some embodiments of this application, an initial grayscale compensation coefficient set is obtained to establish a mapping relationship between the initial voltage drop characteristic value of the first pixel 22 and the initial grayscale compensation coefficient, so as to reflect the degree of compensation when the display panel 100 displays the target image and the target display signal received by a small number of different first pixels 22 is affected by different voltage drops.

[0058] In some embodiments, the target display signal may include, but is not limited to, a power signal. For example, the target display signal may be a VDD signal. The greater the voltage drop affecting the target display signal received by the first pixel 22, the smaller the actual value of the target display signal received by the first pixel 22. Conversely, the smaller the voltage drop affecting the target display signal, the larger the actual value of the target display signal received by the first pixel 22.

[0059] In some embodiments, the target image can be an image displayed by each first pixel 22 of the display panel 100 based on a preset grayscale value.

[0060] In some embodiments, the preset grayscale value can be the maximum grayscale value within the grayscale value range of the first pixel 22. For example, when the grayscale value range of the first pixel 22 is 0 to 1, the preset grayscale value is 1.

[0061] In some embodiments, when the first pixel 22 includes a first sub-pixel 211 to a third sub-pixel 213, which emit red light, green light, and blue light respectively, and the preset grayscale value is the maximum grayscale value, the target image can be a pure white image. In a pure white image, the brightness unevenness of each sub-pixel 21 due to voltage drop is the most severe. Therefore, using this pure white image as the target image to determine the initial grayscale compensation coefficient of each pixel 21 can better improve the brightness unevenness of the display panel 100.

[0062] When the first pixel 22 includes first sub-pixels 211 to third sub-pixels 213, the initial grayscale compensation coefficient set may include a first initial grayscale compensation coefficient set, a second initial grayscale compensation coefficient set, and a third initial grayscale compensation coefficient set. The first initial grayscale compensation coefficient set includes the first initial voltage drop feature value of the first sub-pixel 211 and the first initial grayscale compensation coefficient corresponding to the first initial voltage drop feature value. The second initial grayscale compensation coefficient set includes the second initial voltage drop feature value of the second sub-pixel 212 and the second initial grayscale compensation coefficient corresponding to the second initial voltage drop feature value. The third initial grayscale compensation coefficient set includes the third initial voltage drop feature value of the third sub-pixel 213 and the third initial grayscale compensation coefficient corresponding to the third initial voltage drop feature value.

[0063] In some embodiments, when the target image is a pure white image, the initial grayscale compensation coefficient of each sub-pixel in the first pixel 22 can be determined based on the actual brightness value of the sub-pixel in the pure white image and a reference brightness value. The actual brightness value can be measured by a brightness testing device such as a luminance meter. The reference brightness value can be determined based on the actual brightness value of each sub-pixel in the pure white image.

[0064] In some embodiments, the initial grayscale compensation coefficient for each sub-pixel can be equal to the reference luminance value divided by the actual luminance value. For example, the first initial grayscale compensation coefficient can be equal to the first reference luminance value of the first sub-pixel 211 in a pure white image divided by the first actual luminance value; the second initial grayscale compensation coefficient can be equal to the second reference luminance value of the second sub-pixel 212 in a pure white image divided by the second actual luminance value; and the third initial grayscale compensation coefficient can be equal to the third reference luminance value of the third sub-pixel 213 in a pure white image divided by the third actual luminance value.

[0065] In some embodiments, the reference brightness value can be equal to the minimum actual brightness value of each sub-pixel in a pure white image. Therefore, the reference brightness value is less than or equal to the actual brightness value, and the initial grayscale compensation coefficient for each sub-pixel is less than or equal to 1. For sub-pixels whose actual brightness is less affected by voltage drop, their compensation coefficient is smaller, and their brightness is significantly reduced through compensation. For sub-pixels whose actual brightness is more affected by voltage drop, their compensation coefficient is larger, and their brightness is reduced less or not at all after compensation. Thus, the actual brightness of different sub-pixels 21 is reduced to different degrees to improve the brightness uniformity of the display panel 100.

[0066] For example, for the first sub-pixel 211, the first reference brightness value can be equal to the minimum value of the actual brightness of each first sub-pixel 211 in a pure white image.

[0067] In some embodiments, the reference brightness value can be equal to the average actual brightness of each sub-pixel in a pure white image. Therefore, for sub-pixels whose actual brightness is less affected by voltage drops, their compensation coefficient can be less than 1 to reduce their brightness to the average brightness through compensation. For sub-pixels whose actual brightness is more affected by voltage drops, their compensation coefficient can be greater than 1 to increase their brightness to the average brightness through compensation. In this way, the brightness of some sub-pixels is increased, while the brightness of other sub-pixels is decreased, to improve the brightness uniformity of the display panel 100.

[0068] For example, for the first sub-pixel 211, the first reference brightness value can be equal to the average of the actual brightness values ​​of each first sub-pixel 211 in a pure white image.

[0069] In some embodiments, the reference brightness value can be equal to the maximum actual brightness of each sub-pixel in a pure white image. Therefore, the reference brightness value is greater than or equal to the actual brightness value, and the initial grayscale compensation coefficient for each sub-pixel is greater than or equal to 1. For sub-pixels whose actual brightness is significantly affected by voltage drop, their compensation coefficient is larger, and their brightness is significantly improved through compensation. For sub-pixels whose actual brightness is less affected by voltage drop, their compensation coefficient is smaller, and their brightness is improved less or not at all after compensation. Thus, the brightness of different sub-pixels is increased to different degrees to improve the brightness uniformity of the display panel 100.

[0070] For example, for the first sub-pixel 211, the first reference brightness value can be equal to the maximum value of the actual brightness value of each first sub-pixel 211 in a pure white image.

[0071] Figure 4 This is a schematic diagram of a structure of multiple grayscale statistical partitions of a display panel provided in an embodiment of this application.

[0072] In some embodiments, the method for determining the initial voltage drop characteristic value of each first pixel 22 may include: dividing the display area 11A into multiple grayscale statistical partitions 11C, wherein the first pixel 22 is located at the middle position of the vertex or edge of the grayscale statistical partition (e.g., ...). Figure 4 (As shown); then, based on the preset grayscale values ​​corresponding to each pixel 21 in each grayscale statistical partition 11C in the target image, the initial cumulative grayscale value corresponding to each grayscale statistical partition 11C in the target image is determined. Finally, for each first pixel 22, based on the initial cumulative grayscale values ​​of each grayscale statistical partition 11C between the first pixel 22 and the corresponding reference pixel 24, the initial voltage drop feature value of the first pixel 22 is obtained. The voltage drop feature value of the reference pixel 24 is equal to 0.

[0073] In some embodiments of this application, firstly, the display area 11A is divided into multiple grayscale statistical partitions 11C. Next, the initial cumulative grayscale value corresponding to each grayscale statistical partition 11C is used to characterize the voltage drop impact of that area. Finally, based on the cumulative grayscale values ​​of each grayscale statistical partition 11C between the first pixel 22 and the reference pixel 24, the initial voltage drop characteristic value of the first pixel 22 is obtained. Thus, the voltage drop impact on the target display signal received by the first pixel 22 can be calculated using a simple calculation method.

[0074] It should be noted that the target display signal received by reference pixel 24 is almost unaffected by voltage drop; therefore, the voltage drop characteristic value of reference pixel 24 is equal to 0. Generally, reference pixel 24 can be the brightest pixel in the target image, for example, reference pixel 24 can be a pixel located on the edge of the display area 11A near the source drive circuit. The first pixel 22 is arranged side by side with the corresponding reference pixel 24, for example, they are located in the same column or the same row.

[0075] As an example, multiple grayscale statistical partitions 11C can be divided based on the uneven brightness when the display panel 100 displays the target image, the position of each first pixel 22, and the position of the reference pixel 24.

[0076] In some embodiments, if along the second direction Y, from the lower side of the display panel 100 (the side of the display panel 100 where the source drive circuit 13 is disposed) to the upper side of the display panel 100, the brightness gradually increases. At this time, as... Figure 4 As shown, the multiple reference pixels 24 can be the first pixel 22 located on the lower edge of the display area 11A.

[0077] At the same time, such as Figure 4 As shown, the display area 11A is divided into (M+1)*N grayscale statistical partitions 11C. (M+1) represents the number of columns of the grayscale statistical partitions 11C along the first direction X. For the first and last columns of the grayscale statistical partitions 11C along the first direction X, the first pixel 22 is located at the vertex of the grayscale statistical partition 11C. For the remaining grayscale statistical partitions 11C along the first direction X, excluding the first and last columns, the first pixel 22 is located at the middle position of the edge of the grayscale statistical partition 11C extending along the first direction X. N represents the number of rows of the grayscale statistical partitions 11C along the second direction Y, and the size of each grayscale statistical partition 11C along the second direction Y is equal to the size of each display area 11B.

[0078] It should be noted that both the grayscale statistical partition 11C and the display partition 11B are virtual areas, defined when the grayscale compensation method of this application is implemented.

[0079] In some embodiments, the brightness gradually increases along the second direction Y from the left side to the right side of the display panel 100. Thus, the plurality of reference pixels 24 can be a plurality of first pixels 22 located on the left edge of the display area 11A of the display panel 100, and each of them has an initial voltage drop characteristic value equal to 0. Simultaneously, the display area 11A is divided into M*(N+1) display partitions 11B. M represents the number of columns of the grayscale statistical partitions 11C along the first direction X, and the size of each grayscale statistical partition 11C along the first direction X is equal to the size of each display partition 11B. (N+1) represents the number of rows of the grayscale statistical partitions 11C along the second direction Y. For the first and last rows of grayscale statistical partitions 11C along the second direction Y, the first pixel 22 is located at the vertex of the grayscale statistical partition 11C. For the remaining grayscale statistical partitions 11C along the second direction Y, excluding the first and last rows, the first pixel 22 is located at the middle position of the edge of the grayscale statistical partition 11C extending along the first direction X.

[0080] In some embodiments, if there is uneven brightness of the display panel 100 along the first direction X and the second direction Y, it is necessary to calculate two initial voltage drop characteristics of the first pixel 22 along the first direction X and the second direction Y respectively, and compensate according to these two voltage drop characteristic values. The calculation method of the two initial voltage drop characteristics of the first pixel 22 along the first direction X and the second direction Y can be as described above, and will not be repeated here.

[0081] In some embodiments, pixel 21 includes a first sub-pixel 211, a second sub-pixel 212, and a third sub-pixel 213; based on the preset grayscale value corresponding to each pixel 21 in each grayscale statistical partition 11C in the target image, the initial cumulative grayscale value corresponding to each grayscale statistical partition 11C in the target image is determined, including:

[0082] The preset grayscale values ​​corresponding to the first sub-pixel 211 in each grayscale statistical partition 11C in the target image are summed to obtain the first initial cumulative grayscale value corresponding to each grayscale statistical partition 11C.

[0083] The preset grayscale values ​​corresponding to the second sub-pixels 212 in each grayscale statistical partition 11C in the target image are summed to obtain the second initial cumulative grayscale value corresponding to each grayscale statistical partition 11C.

[0084] The preset grayscale values ​​of each third sub-pixel 213 in each grayscale statistical partition 11C are summed in the target image to obtain the third initial cumulative grayscale value in each grayscale statistical partition 11C.

[0085] In some embodiments, based on the first initial cumulative grayscale value, the second initial cumulative grayscale value, and the third initial cumulative grayscale value, for each first pixel 22, based on the initial cumulative grayscale value of each grayscale statistical partition 11C between the first pixel 22 and the reference pixel 24 corresponding to the first pixel 22, the initial voltage drop feature value of the first pixel 22 is obtained, including:

[0086] For each first sub-pixel 211 of the first pixel 22, the first initial cumulative gray level values ​​corresponding to each gray level statistical partition 11C between the first pixel 22 and the reference pixel 24 corresponding to the first pixel 22 are summed to obtain the first initial voltage drop feature value.

[0087] For each second sub-pixel 212 of the first pixel 22, the second initial cumulative gray level values ​​corresponding to each gray level statistical partition 11C between the first pixel 22 and the reference pixel 24 corresponding to the first pixel 22 are summed to obtain the second initial voltage drop feature value.

[0088] For each third sub-pixel 213 of the first pixel 22, the third initial cumulative gray level values ​​corresponding to each gray level statistical partition 11C between the first pixel 22 and the reference pixel 24 corresponding to the first pixel 22 are summed to obtain the third initial voltage drop feature value.

[0089] For example, for Figure 4 The first sub-pixel 211 of the first pixel 22A is located at the vertex of the grayscale statistical partition 11C in the first column and first row. Furthermore, the reference pixel 24 corresponding to the first pixel 22A is located at the vertex of the grayscale statistical partition 11C in the first column and last row. Therefore, the first initial cumulative grayscale values ​​in each grayscale statistical partition 11C in the first column are summed to obtain the first initial voltage feature value of the first sub-pixel 211. Specifically, the first initial voltage feature value of the first sub-pixel 211 in the first column and first row of grayscale statistical partition 11C is equal to 1*p*q=pq. 1 represents the preset grayscale value corresponding to each first sub-pixel 211 in each grayscale statistical partition 11C in the target image, p represents the number of first sub-pixels 211 in each grayscale statistical partition 11C, and q represents the number of grayscale statistical partitions 11C in the first column of grayscale statistical partition 11C. Based on the same calculation method, it can be found that the initial voltage feature values ​​of the second sub-pixel 212 and the third sub-pixel 213 of the grayscale statistical partition 11C in the first column and the first row are also equal to pq.

[0090] Figure 5 The curve showing the relationship between the first initial voltage drop characteristic value and the first initial gray-level compensation coefficient in the first initial gray-level compensation coefficient set provided in the embodiments of this application.

[0091] In some embodiments, such as Figure 5As shown, based on the first initial voltage drop characteristic value and the first initial grayscale compensation coefficient corresponding to the first initial voltage drop characteristic value in the first initial grayscale compensation coefficient set, the relationship curve between the first initial voltage drop characteristic value and the first initial grayscale compensation coefficient can be obtained through curve fitting. Combined with... Figure 5 As shown in the example, when the first initial voltage characteristic value of the first sub-pixel 211 is equal to 0, the first initial grayscale compensation coefficient is 0.57; when the first initial voltage characteristic value of the first sub-pixel 211 is equal to 300, the compensation coefficient is 1. Therefore, for the first sub-pixel 211 with higher brightness, its brightness can be reduced by lowering the grayscale value; for the first sub-pixel 211 with lower brightness, its grayscale value is reduced less or not at all. In this way, the uneven brightness of the display panel caused by voltage drop can be improved.

[0092] Step S130: Based on the initial grayscale value of each pixel 21, determine the current voltage drop characteristic value of each first pixel 22; wherein, the current voltage drop characteristic value represents the voltage drop effect on the current display signal received by the corresponding first pixel 22 when the display panel 100 displays the current frame.

[0093] In some embodiments of this application, based on the initial grayscale value of each pixel 21, the current voltage drop characteristic value of each first pixel 22 is determined to calculate in real time the voltage drop effect on the current display signal received by each first pixel 22, so as to compensate in real time for the brightness unevenness caused by the voltage drop effect according to the current voltage drop characteristic value of the first pixel 22.

[0094] Figure 6 Provided for the embodiments of this application Figure 3 A flowchart of step S130.

[0095] In some embodiments, such as Figure 6 As shown, step S130 includes steps S131 to S133.

[0096] Step S131: Divide the display area 11A into multiple grayscale statistical partitions 11C, with the first pixel 22 located at the middle position of the vertex or edge of the grayscale statistical partition.

[0097] In step S131, the multiple grayscale statistical partitions 11C are the same as those in step S120 above. Thus, for both the target image and the current frame image, the voltage drop effect can be calculated based on the same multiple grayscale statistical partitions 11C.

[0098] Step S132: Based on the initial grayscale values ​​of each pixel 21 in each grayscale statistical partition 11C, determine the cumulative grayscale value corresponding to the grayscale statistical partition 11C.

[0099] In some embodiments, for step S132, determining the cumulative grayscale value corresponding to each grayscale statistical partition 11C based on the initial grayscale value of each pixel 21 in each grayscale statistical partition 11C includes: summing the initial grayscale values ​​of all pixels 21 in each grayscale statistical partition 11C to obtain the cumulative grayscale value of the grayscale statistical partition 11C. Thus, the sum of the initial grayscale values ​​of each pixel 21 in each grayscale statistical partition 11C represents the voltage drop effect of that grayscale statistical partition 11C.

[0100] For example, when pixel 21 includes a first sub-pixel 211, a second sub-pixel 212, and a third sub-pixel 213, the initial grayscale values ​​of all pixels 21 in each grayscale statistical partition 11C are summed to obtain the cumulative grayscale value of the grayscale statistical partition 11C, including:

[0101] The initial grayscale values ​​of each first sub-pixel 211 in each grayscale statistical partition 11C are summed to obtain the first cumulative grayscale value of the grayscale statistical partition 11C in the current frame.

[0102] The initial grayscale values ​​of each second sub-pixel 212 in each grayscale statistical partition 11C are summed to obtain the second cumulative grayscale value of grayscale statistical partition 11C in the current frame.

[0103] The initial grayscale values ​​of each third sub-pixel 213 in each grayscale statistical partition 11C are summed to obtain the third cumulative grayscale value of the grayscale statistical partition 11C in the current frame.

[0104] Step S133: For each first pixel 22, based on the cumulative grayscale values ​​of each grayscale statistical partition 11C between the first pixel 22 and the reference pixel 24 corresponding to the first pixel 22, the current voltage drop feature value of the first pixel 22 is obtained; wherein, the cumulative grayscale value of the reference pixel 24 is equal to 0.

[0105] In some embodiments of this application, the current voltage drop characteristic value of the first pixel 22 is obtained based on the influence of each grayscale statistical partition 11C between the reference pixel 24 and the first pixel 22 on the voltage drop of the first pixel 22.

[0106] In some embodiments, for step S133, for each first pixel 22, the current voltage drop feature value of the first pixel 22 is obtained based on the cumulative grayscale values ​​of each grayscale statistical partition 11C between the first pixel 22 and the corresponding reference pixel 24. This includes summing the cumulative grayscale values ​​of each of the grayscale statistical partitions 11C between the first pixel 22 and the corresponding reference pixel 24 to obtain the current voltage drop feature value of each first pixel 22. Thus, the sum of the cumulative grayscale values ​​of each of the grayscale statistical partitions 11C between the first pixel 22 and the corresponding reference pixel 24 represents the current voltage drop feature value of the first pixel 22.

[0107] For example, based on the first cumulative grayscale value, the second cumulative grayscale value, and the third cumulative grayscale value obtained in step S132 above, the cumulative grayscale values ​​of each of the grayscale statistical partitions 11C between the first pixel 22 and the corresponding reference pixel 24 are summed to obtain the current voltage drop feature value of each first pixel 22, including:

[0108] For each first sub-pixel 211 of the first pixel 22, the first cumulative gray level values ​​corresponding to each gray level statistical partition 11C between the first pixel 22 and the reference pixel 24 in the current frame are summed to obtain the first current voltage drop feature value of the first sub-pixel 211.

[0109] For each second sub-pixel 212 of the first pixel 22, the second cumulative gray level value corresponding to each gray level statistical partition 11C between the first pixel 22 and the reference pixel 24 in the current frame is summed to obtain the second current voltage drop feature value of the second sub-pixel 212.

[0110] For each third sub-pixel 213 of the first pixel 22, the third cumulative gray level value corresponding to each gray level statistical partition 11C between the first pixel 22 and the reference pixel 24 in the current frame is summed to obtain the third initial voltage drop feature value of the third sub-pixel 213.

[0111] Step S140: Based on the current voltage drop feature value of each first pixel 22 and the initial gray level compensation coefficient set, determine the first gray level compensation coefficient of each first pixel 22, and determine the second gray level compensation coefficient of each second pixel 23 according to the first gray level compensation coefficient.

[0112] In some embodiments of this application, the first grayscale compensation coefficients of a small number of first pixels 22 in the current frame are first determined in real time based on the current voltage drop characteristic values ​​of a small number of first pixels 22 and an initial grayscale compensation coefficient set. Then, based on the first grayscale compensation coefficients of a small number of first pixels 22 in each display partition 11B in the current frame, the second grayscale compensation coefficients of a large number of second pixels 23 in each display partition 11B in the current frame are determined. This simplifies the calculation method for the compensation coefficients of pixels 21 in each display partition 11B.

[0113] Figure 7 Provided for the embodiments of this application Figure 3 A flowchart of step S140

[0114] In some embodiments, such as Figure 7 As shown, step S140 includes the following steps S141 to S143.

[0115] Step S141: Determine two initial voltage drop feature values ​​that are adjacent to the current voltage drop feature value of each first pixel 22 in the initial grayscale compensation coefficient set.

[0116] For example, based on obtaining the first to third current voltage drop feature values ​​in step S133 above, two initial voltage drop feature values ​​adjacent to the current voltage drop feature value of each first pixel 22 in the initial grayscale compensation coefficient set are determined, including:

[0117] Determine two first initial voltage drop feature values ​​that are adjacent to the first current voltage drop feature value of each first sub-pixel 211 in the first initial grayscale compensation coefficient set;

[0118] Determine the two second initial voltage drop feature values ​​that are adjacent to the second current voltage drop feature value of each second sub-pixel 212 in the second initial grayscale compensation coefficient set;

[0119] Determine the two third initial voltage drop feature values ​​that are adjacent to the third current voltage drop feature value of each third sub-pixel 213 in the third initial gray level compensation coefficient set.

[0120] Step S142: Based on two initial voltage drop characteristic values ​​and two initial gray-level compensation coefficients corresponding to the two initial voltage drop characteristic values, and the current voltage drop characteristic value, the first gray-level compensation coefficient corresponding to the current voltage drop characteristic value is obtained through the first interpolation algorithm.

[0121] In some embodiments, the first interpolation algorithm may include, but is not limited to, a linear interpolation algorithm.

[0122] For example, the first grayscale compensation coefficient of the first sub-pixel 211 in the first pixel 22 can be expressed as Cr = Cr2 + (IRr - IRr2) * (Cr1 - Cr2) / (IRr1 - IRr2). Where IRr represents the first current voltage drop feature value of the first sub-pixel 211. Cr represents the first grayscale compensation coefficient corresponding to the first current voltage drop feature value. IRr1 and IRr2 respectively represent two adjacent first initial voltage drop feature values ​​of each first sub-pixel 211, with IRr1 being greater than IRr2. Cr1 represents the first initial grayscale compensation coefficient corresponding to IRr1. Cr2 represents the first initial grayscale compensation coefficient corresponding to IRr2.

[0123] Furthermore, the first grayscale compensation coefficient of the second sub-pixel 212 in the first pixel 22 can be expressed as Cg = Cg2 + (IRg - IRg2) * (Cg1 - Cg2) / (IRg1 - IRg2). Here, IRg represents the second current voltage drop feature value of the second sub-pixel 212. Cg represents the first grayscale compensation coefficient corresponding to the second current voltage drop feature value. IRg1 and IRg2 respectively represent two adjacent second initial voltage drop feature values ​​of the third current voltage drop feature value of each second sub-pixel 212, with IRg1 being greater than IRg2. Cg1 represents the second initial grayscale compensation coefficient corresponding to IRg1. Cg2 represents the second initial grayscale compensation coefficient corresponding to IRg2.

[0124] Furthermore, the first grayscale compensation coefficient of the third sub-pixel 213 in the first pixel 22 can be expressed as Cb = Cb2 + (IRb - IRb2) * (Cb1 - Cb2) / (IRb1 - IRb2). Here, IRb represents the third current voltage drop feature value of the third sub-pixel 213. Cb represents the first grayscale compensation coefficient corresponding to the third current voltage drop feature value. IRb1 and IRb2 represent the two adjacent third initial voltage drop feature values ​​of each third sub-pixel 213, with IRb1 being greater than IRb2. Cb1 represents the third initial grayscale compensation coefficient corresponding to IRb1. Cb2 represents the third initial grayscale compensation coefficient corresponding to IRb2.

[0125] Step S143: For the second pixel 23 of each display partition 11B, obtain the first position data of each first pixel 22 and the second position data of each second pixel 23, and based on the first position data and the first grayscale compensation coefficient of each first pixel 22 and the second position data of the second pixel 23, obtain the second grayscale compensation coefficient of the second pixel 23 through the second interpolation algorithm.

[0126] In some embodiments, the second interpolation algorithm includes, but is not limited to, bilinear interpolation.

[0127] The first position data of the first pixel 22 and the second position data of the second pixel 23 can be determined according to their respective row and column numbers in the display panel 100. For example, if a first pixel 22 is located in the i-th row and j-th column of the display panel 100, then the first position data of the first pixel 22 can be represented by (i, j).

[0128] For example, when each display partition 11B is rectangular, each display partition 11B is provided with four first pixels 22 and multiple second pixels 23. The first position data of the four first pixels 22 can be (i, j), (i, j+k1), (i+k2, j), and (i+k2, j+k1), respectively, and the second position data of one second pixel 23 can be (p, q). Where i and j are integers greater than or equal to 1, k1 and k2 are integers greater than or equal to 2, p is greater than or equal to i and less than or equal to i+k1, and q is greater than or equal to j and less than or equal to j+k2. Wherein, the second grayscale compensation coefficient of the first sub-image in the second pixel 23 can be expressed as Cr'=Crm2+((i+k2)-p)*(Crm1-Crm2) / k2, Crm1=Cr i,j +(qj)*(Cr i,j+k1 -Cr i,j ) / k1, Crm2=Cr i+k2，j +(qj)*(Cr i+k2,j+k1 -Cr i+k2,j ) / k1. Cr i,j Cr represents the first grayscale compensation coefficient of the first sub-pixel 211 in the first pixel 22 with first position data (i, j). i,j+k1 Cr represents the first grayscale compensation coefficient of the first sub-pixel 211 in the first pixel 22 with the first position data (i, j+k1). i+k2，j Cr represents the first grayscale compensation coefficient of the first sub-pixel 211 in the first pixel 22 with the first position data (i+k2,j). i+k2,j+k1 The first grayscale compensation coefficient represents the first sub-pixel 211 in the first pixel 22 with the first position data (i+k2, j+k1).

[0129] It should be noted that the calculation method of the second grayscale coefficient of the second sub-pixel 212 and the third sub-pixel 213 in the second pixel 23 can be the same as the calculation method of the second grayscale coefficient of the first sub-pixel 211 in the second pixel 23. It is only necessary to replace the first grayscale compensation coefficient of the four first sub-pixels 211 with the first grayscale compensation coefficient of the four second sub-pixels 212 or the four third sub-pixels 213.

[0130] In some embodiments, the grayscale compensation method further includes the following steps S150 to S160.

[0131] Step S150: Determine the first target gray level value of each first pixel 22 based on the first gray level compensation coefficient and the initial gray level value corresponding to each first pixel 22.

[0132] In one possible implementation, the first gray level compensation coefficient corresponding to each first pixel 22 can be multiplied by the initial gray level value to obtain the first target gray level value.

[0133] For example, when the first pixel 22 includes the first sub-pixels 211 to the third sub-pixels 213, the first gray level compensation value corresponding to the first sub-pixel 211 in the first pixel 22 is multiplied by the initial gray level value to obtain the first target gray level value of the first sub-pixel 211; the first gray level compensation value corresponding to the second sub-pixel 212 in the first pixel 22 is multiplied by the initial gray level value to obtain the first target gray level value of the second sub-pixel 212; and the first gray level compensation value corresponding to the third sub-pixel 213 in the first pixel 22 is multiplied by the initial gray level value to obtain the first target gray level value of the third sub-pixel 213.

[0134] Step S160: Based on the second grayscale compensation coefficient and the initial grayscale value corresponding to the second pixel 23, determine the second target grayscale value of each second pixel 23.

[0135] In some embodiments, the second grayscale compensation coefficient corresponding to the second pixel 23 can be multiplied by the initial grayscale value to obtain the second target grayscale value.

[0136] For example, when the first pixel 22 includes the first sub-pixels 211 to the third sub-pixels 213, the second grayscale compensation value corresponding to the first sub-pixel 211 in the second pixel 23 is multiplied by the initial grayscale value to obtain the second target grayscale value of the first sub-pixel 211; the second grayscale compensation value corresponding to the second sub-pixel 212 in the second pixel 23 is multiplied by the initial grayscale value to obtain the second target grayscale value of the second sub-pixel 212; and the first grayscale compensation value corresponding to the third sub-pixel 213 in the second pixel 23 is multiplied by the initial grayscale value to obtain the first target grayscale value of the third sub-pixel 213.

[0137] In some embodiments of this application, for steps S150 and S160 above, the initial grayscale value of the first pixel 22 is compensated by a first grayscale compensation coefficient, and the initial grayscale value of the second pixel 23 is compensated by a second grayscale compensation coefficient, so as to compensate the initial grayscale value of each pixel 21 in real time according to the voltage drop effect of the current display signal received by each pixel 21 in the current frame, thereby improving the uneven brightness caused by voltage drop when the display panel 100 displays the current frame.

[0138] It should be noted that the first current voltage drop feature value of the first sub-pixel 211 in each first pixel 22 and the corresponding first target grayscale value constitute the first current grayscale compensation coefficient set; the second current voltage drop feature value of the second sub-pixel 212 in each first pixel 22 and the corresponding first target grayscale value constitute the second current grayscale compensation coefficient set; the third current voltage drop feature value of the third sub-pixel 213 in each first pixel 22 and the corresponding first target grayscale value constitute the third current grayscale compensation coefficient set. The first current grayscale compensation coefficient set, the second current grayscale compensation coefficient set, and the third current grayscale compensation coefficient set constitute the current grayscale compensation coefficient set. After the display panel 100 displays the current frame image according to the current grayscale compensation coefficient set, the initial grayscale compensation coefficient set can be updated to the current grayscale compensation coefficient set so that the current grayscale compensation coefficient set can be used for the calculation of compensation coefficients in the next frame image.

[0139] In some embodiments, after obtaining the first target grayscale value of each first pixel 22 and the second target grayscale value of each second pixel 23 through the above steps, the first target grayscale value of each first pixel 22 can be used as the initial grayscale value of the first pixel 22, and the second target grayscale value of each second pixel 23 can be used as the initial grayscale value of the second pixel 23. Then, steps S110 to S160 are repeated until the difference between the first target grayscale value and the corresponding initial grayscale value is less than or equal to a first threshold, and the difference between the second target grayscale value and the corresponding initial grayscale value is less than or equal to a second threshold. Thus, based on multiple compensations, the brightness unevenness caused by voltage drop is more accurately compensated, thereby better improving the brightness unevenness caused by voltage drop.

[0140] like Figure 1 and Figure 8 As shown, in a second aspect, in one embodiment, this application provides a grayscale compensation device 121 for a display panel 100. The display area 11A of the display panel 100 includes a plurality of display partitions 11B. Each display partition 11B includes a plurality of pixels 21. The pixel 21 at the vertex of the display partition 11B is defined as a first pixel 22, and the remaining pixels 21 are defined as second pixels 23. The grayscale compensation device 121 includes a first acquisition unit 122, a second acquisition unit 123, a first determination unit 124, and a second determination unit 125.

[0141] The first acquisition unit 122 is configured to acquire the initial grayscale value of each pixel 21 in the current frame of the display panel 100 to be displayed. The second acquisition unit 123 is configured to acquire an initial grayscale compensation coefficient set, which includes the initial voltage drop feature value of each first pixel 22 and the initial grayscale compensation coefficient corresponding to the initial voltage drop feature value. The initial voltage drop feature value represents the voltage drop impact on the target display signal received by the corresponding first pixel 22 when the display panel 100 displays the target image. The first determination unit 124 is configured to determine the current voltage drop feature value of each first pixel 22 based on the initial grayscale value of each pixel 21. The current voltage drop feature value represents the voltage drop impact on the current display signal received by the corresponding first pixel 22 when the display panel 100 displays the current frame. The second determining unit 125 is configured to determine a first grayscale compensation coefficient for each first pixel 22 based on the current voltage drop feature value of each first pixel 22 and an initial grayscale compensation coefficient set, and to determine a second grayscale compensation coefficient for each second pixel 23 based on the first grayscale compensation coefficient.

[0142] The first acquisition unit 122, the second acquisition unit 123, the first determination unit 124, and the second determination unit 125 are respectively used to execute steps S110-S140 in the aforementioned method embodiment. For the specific implementation of these functional units, please refer to the description of the corresponding steps above, which will not be repeated here.

[0143] In some embodiments, the grayscale compensation device 121 may be a component of the timing controller 12.

[0144] Those skilled in the art will understand that all or part of the steps in any of the methods in the above embodiments can be performed by a computer program or by a computer program controlling related hardware. The computer program can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0145] Thirdly, in one embodiment, such as Figure 1 As shown, this application provides a display panel 100. The display panel 100 includes a memory and a processor. The memory stores a computer program, and the processor runs the computer program in the memory to perform the steps in the grayscale compensation method of the display panel 100 described above.

[0146] Fourthly, in one embodiment, this application provides a storage medium storing a plurality of computer programs that can be loaded by a processor to perform the steps of the above-described method.

[0147] It will be understood by those skilled in the art that any references to memory, storage, database, or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchlink, DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0148] Since the computer program stored in the storage medium can execute the steps of the grayscale compensation method of the display panel 100 in any embodiment of the present application, the beneficial effects that the grayscale compensation method of the display panel 100 in any embodiment of the present application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0149] The above description of the embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application; those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A grayscale compensation method for a display panel, characterized in that, The display panel includes multiple display zones, each display zone including multiple pixels. The pixel at the vertex of the display zone is defined as the first pixel, and the remaining pixels are defined as the second pixel. The grayscale compensation method includes: For the current frame of the display panel to be displayed, obtain the initial grayscale value of each pixel in the current frame; An initial grayscale compensation coefficient set is obtained, which includes an initial voltage drop feature value for each first pixel and an initial grayscale compensation coefficient corresponding to the initial voltage drop feature value. The initial voltage drop feature value represents the voltage drop effect on the target display signal received by the first pixel when the display panel displays the target image. Based on the initial grayscale value of each pixel, a current voltage drop characteristic value is determined for each first pixel; wherein, the current voltage drop characteristic value represents the voltage drop impact on the current display signal received by the first pixel when the display panel displays the current frame; Based on the current voltage drop feature value of each first pixel and the initial gray level compensation coefficient set, a first gray level compensation coefficient for each first pixel is determined, and a second gray level compensation coefficient for each second pixel is determined based on the first gray level compensation coefficient.

2. The grayscale compensation method according to claim 1, characterized in that, The plurality of first pixels are arranged in an array along intersecting first and second directions; determining the current voltage drop feature value of each first pixel based on the initial grayscale value of each pixel includes: The display area is divided into multiple grayscale statistical zones, and the first pixel is located at the middle position of the vertex or edge of the grayscale statistical zone; Based on the initial grayscale value of each pixel in each of the grayscale statistical partitions, the cumulative grayscale value corresponding to the grayscale statistical partition is determined; and For each first pixel, the current voltage drop feature value of the first pixel is obtained based on the cumulative gray level values ​​of each gray level statistical partition between the first pixel and the corresponding reference pixel; wherein, the voltage drop feature value of the reference pixel is equal to 0.

3. The grayscale compensation method according to claim 2, characterized in that, The step of determining the cumulative grayscale value corresponding to each grayscale statistical partition based on the initial grayscale value of each pixel in each grayscale statistical partition includes: The initial grayscale values ​​of all pixels in each grayscale statistical partition are summed to obtain the cumulative grayscale value of the grayscale statistical partition.

4. The grayscale compensation method according to claim 2, characterized in that, For each first pixel, based on the cumulative grayscale values ​​of each grayscale statistical partition between the first pixel and the corresponding reference pixel, the current voltage drop feature value of the first pixel is obtained, including: The cumulative grayscale values ​​of each grayscale statistical partition between the first pixel and the corresponding reference pixel are summed to obtain the current voltage drop feature value of each first pixel.

5. The grayscale compensation method according to claim 1, characterized in that, The step of determining a first grayscale compensation coefficient for each first pixel based on the current voltage drop feature value of each first pixel and an initial grayscale compensation coefficient set, and determining a second grayscale compensation coefficient for each second pixel based on the first grayscale compensation coefficient, includes: Determine two initial voltage drop feature values ​​that are adjacent to the current voltage drop feature value of each first pixel in the initial grayscale compensation coefficient set; Based on the two initial voltage drop feature values ​​and the two initial grayscale compensation coefficients corresponding to the two initial voltage drop feature values, and the current voltage drop feature value, the first grayscale compensation coefficient corresponding to the current voltage drop feature value is obtained through the first interpolation algorithm; For the second pixel of each of the display partitions, the first position data of each first pixel and the second position data of each second pixel are obtained, and based on the first position data of each first pixel and the first grayscale compensation coefficient, and the second position data of the second pixel, the second grayscale compensation coefficient of the second pixel is obtained through a second interpolation algorithm.

6. The grayscale compensation method according to claim 1, characterized in that, The grayscale compensation method further includes: Based on the first gray level compensation coefficient and the initial gray level value corresponding to each first pixel, the first target gray level value of each first pixel is determined; Based on the second grayscale compensation coefficient corresponding to the second pixel and the initial grayscale value, the second target grayscale value of each second pixel is determined.

7. The grayscale compensation method according to claim 6, characterized in that, Determining the first target grayscale value of each first pixel based on the first grayscale compensation coefficient corresponding to each first pixel and the initial grayscale value includes: Multiply the first grayscale compensation coefficient corresponding to each first pixel by the initial grayscale value to obtain the first target grayscale value; The step of determining the second target grayscale value for each second pixel based on the second grayscale compensation coefficient corresponding to the second pixel and the initial grayscale value includes: The second target gray level value is obtained by multiplying the second gray level compensation coefficient corresponding to the second pixel with the initial gray level value.

8. A grayscale compensation device for a display panel, characterized in that, The display panel includes multiple display zones, each display zone including multiple pixels. The pixel at the vertex of the display zone is defined as the first pixel, and the remaining pixels are defined as the second pixel. The grayscale compensation device includes: The first acquisition unit is configured to acquire the initial grayscale value of each pixel in the current frame of the display panel to be displayed. The second acquisition unit is configured to acquire an initial grayscale compensation coefficient set, which includes an initial voltage drop feature value for each first pixel and an initial grayscale compensation coefficient corresponding to the initial voltage drop feature value. The initial voltage drop feature value represents the voltage drop effect on the target display signal received by the first pixel when the display panel displays the target image. The first determining unit is configured to determine the current voltage drop feature value of each first pixel based on the initial grayscale value of each pixel; wherein the current voltage drop feature value represents the voltage drop effect on the current display signal received by the first pixel when the display panel displays the current frame image; The second determining unit is configured to determine a first grayscale compensation coefficient for each first pixel based on the current voltage drop feature value of each first pixel and the initial grayscale compensation coefficient set, and to determine a second grayscale compensation coefficient for each second pixel based on the first grayscale compensation coefficient.

9. A display panel, characterized in that, It includes a memory and a processor; the memory stores a computer program, and the processor is used to run the computer program in the memory to perform the steps in the grayscale compensation method for a display panel according to any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a computer program, which is loaded by a processor to execute the steps of a grayscale compensation method for a display panel according to any one of claims 1 to 7.

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