A display compensation method of a display panel and a display device

Abstract

The application provides a display compensation method of a display panel, and a display device. The display compensation method comprises the following steps: generating a display gray scale corresponding to a to-be-compensated sub-pixel according to an input gray scale corresponding to the to-be-compensated sub-pixel, a plurality of first display compensation tables corresponding to a single-color display picture, and a plurality of second display compensation tables corresponding to a mixed-color display picture; and controlling the to-be-compensated sub-pixel to display according to the corresponding display gray scale. The display gray scale of the to-be-compensated sub-pixel not only includes correction of the single color, but also includes correction of the mixed color, so that the display gray scale of the to-be-compensated sub-pixel can be compensated to be uniform based on the single-color sub-pixel correction, and the display gray scale of the to-be-compensated sub-pixel can also be compensated to be uniform based on the mixed-color sub-pixel correction.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display compensation method and display device for a display panel. Background Technology

[0002] Large-size ultra-high-definition display panels using a 1-Gate 1-Data (1G1D) driving architecture require 12 source driver chips, while a triple-gate (Tri-gate) driving architecture requires only 4. Therefore, the Tri-gate driving architecture is more cost-effective. However, the Tri-gate driving architecture suffers from insufficient pixel charging time. For example, in a 60Hz 4K display panel, the charging time for a single pixel using the 1G1D architecture is 7.5 microseconds, while the charging time for a single pixel using the Tri-gate architecture is approximately 2.5 microseconds. The charging time for a single pixel using the Tri-gate architecture is only one-third that of the 1G1D architecture, resulting in a significant deficiency in pixel charging time.

[0003] For large-size, high-resolution display panels, the manufacturing process is more complex, and the differences between individual panels are greater. Inline monochrome pixel compensation can compensate for the overall differences between each panel. However, inline monochrome pixel compensation uses the brightness of a pure color (R=G=B) grayscale image and obtains the compensation value for each pixel position through gamma curve fitting. Therefore, it can only compensate for non-charging uniformity issues in the grayscale image and cannot perform panel-by-pane adjustment and compensation for charging uniformity issues. Summary of the Invention

[0004] This invention provides a compensation method and a display device for a display panel, which can compensate for the uniformity of rechargeable and non-rechargeable display images.

[0005] This invention provides a display compensation method for a display panel, comprising: generating a first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of first display compensation tables under a corresponding monochrome display screen; generating a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of second display compensation tables under a corresponding mixed color display screen; generating a display grayscale corresponding to the sub-pixel to be compensated based on the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated; and controlling the sub-pixel to be compensated to display according to the corresponding display grayscale.

[0006] Optionally, in some embodiments of the present invention, the step of generating a first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of first display compensation tables under the corresponding monochrome display screen includes: selecting a first display compensation table corresponding to the input grayscale from a plurality of first display compensation tables, based on the input grayscale corresponding to the sub-pixel to be compensated, as a first target display compensation table; and generating the first compensation value based on the compensation value in the first target display compensation table corresponding to the coordinate information of the sub-pixel to be compensated.

[0007] Optionally, in some embodiments of the present invention, the step of generating a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of second display compensation tables under the corresponding mixed color display screen includes: determining the relationship between a reference display grayscale and the input grayscale corresponding to the sub-pixel to be compensated based on the input grayscale corresponding to the sub-pixel to be compensated, so as to select a plurality of second display compensation tables corresponding to the relationship between the reference display grayscale and the input grayscale as a reference compensation group; wherein, the reference display grayscale is the display grayscale of the reference sub-pixel, the reference sub-pixel is located in the row before the row where the sub-pixel to be compensated is located, and is electrically connected to the sub-pixel to be compensated on the same data line; selecting a second display compensation table corresponding to the input grayscale in the reference compensation group based on the input grayscale corresponding to the sub-pixel to be compensated as a second target display compensation table; generating the second compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table.

[0008] Optionally, in some embodiments of the present invention, the step of determining the relationship between a reference display grayscale and the input grayscale corresponding to the sub-pixel to be compensated based on the input grayscale corresponding to the sub-pixel to be compensated, and selecting a plurality of second display compensation tables corresponding to the relationship between the reference display grayscale and the input grayscale as a reference compensation group, includes: determining whether the reference display grayscale is greater than the input grayscale based on the input grayscale corresponding to the sub-pixel to be compensated; when the reference display grayscale is greater than the input grayscale, determining that the first binding point grayscale corresponding to the reference sub-pixel is greater than the second binding point grayscale corresponding to the sub-pixel to be compensated; and selecting a plurality of second display compensation tables corresponding to the first binding point grayscale being greater than the second binding point grayscale as the reference compensation group.

[0009] Optionally, in some embodiments of the present invention, after the step of determining whether the reference display grayscale is greater than the input grayscale based on the input grayscale corresponding to the sub-pixel to be compensated, the method further includes: when the reference display grayscale is less than the input grayscale, determining that the first binding point grayscale corresponding to the reference sub-pixel is less than the second binding point grayscale corresponding to the sub-pixel to be compensated; and selecting a plurality of second display compensation tables corresponding to the first binding point grayscale being less than the second binding point grayscale as the reference compensation group.

[0010] Optionally, in some embodiments of the present invention, in the step of generating a display grayscale corresponding to the sub-pixel to be compensated based on the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated, the display grayscale is obtained according to the formula: Dc=Di+α×Δ1+β×Δ2; where Dc represents the display grayscale, Di represents the input grayscale; Δ1 represents the first compensation value, Δ2 represents the second compensation value; α represents the weight of the first compensation value, and β represents the weight of the second compensation value.

[0011] Optionally, in some embodiments of the present invention, the emission color of the sub-pixel to be compensated is green.

[0012] Optionally, in some embodiments of the present invention, before the step of generating a first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of first display compensation tables under the corresponding monochrome display screen, the method includes: under the monochrome display screen, obtaining a plurality of brightness data corresponding to different binding point grayscales of a plurality of sub-pixels of the display panel; and generating a plurality of first display compensation tables corresponding to different binding point grayscales based on the difference between the brightness data of each binding point grayscale corresponding to a plurality of sub-pixels under the monochrome display screen and the desired brightness data.

[0013] Optionally, in some embodiments of the present invention, before the step of generating a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of second display compensation tables under the corresponding color mixing display screen, the method includes: obtaining the brightness data of a plurality of sub-pixels of the display panel under the color mixing display screen; generating a plurality of second display compensation tables corresponding to a first binding point grayscale greater than a second binding point grayscale and a plurality of second display compensation tables corresponding to a first binding point grayscale less than a second binding point grayscale based on the difference between the brightness data of the plurality of sub-pixels under the color mixing display screen and reference brightness data; wherein, the first binding point grayscale corresponds to a reference sub-pixel, and the second binding point grayscale corresponds to the sub-pixel to be compensated.

[0014] The present invention also provides a display device, including a display panel, a storage module, and a control module. The display panel includes a plurality of pixels, each pixel including at least a first sub-pixel, a second sub-pixel, and a third sub-pixel arranged along a first direction and emitting different colors. The first, second, and third sub-pixels of the same pixel are electrically connected to the same data line, and the first, second, and third sub-pixels of the same pixel are electrically connected to different scan lines. The data line extends along the first direction, and the scan line extends along a second direction intersecting the first direction. The storage module is electrically connected to the display panel and configured to store a plurality of first display compensation tables and a plurality of second display compensation tables. The control module is electrically connected to the display panel and the storage module and configured to compensate the input grayscale corresponding to the sub-pixel to be compensated according to the plurality of first display compensation tables and the plurality of second display compensation tables to obtain a display grayscale corresponding to the sub-pixel to be compensated, and control the sub-pixel to be compensated to display according to the corresponding display grayscale. Among them, multiple first display compensation tables correspond to monochrome display screens, and multiple second display compensation tables correspond to mixed color display screens; the sub-pixel to be compensated is one of the first sub-pixel, the second sub-pixel, and the third sub-pixel.

[0015] Embodiments of the present invention provide a display compensation method and a display device for a display panel. The method generates a display grayscale corresponding to the sub-pixel to be compensated based on the input grayscale corresponding to the sub-pixel to be compensated, multiple first display compensation tables for a corresponding monochrome display, and multiple second display compensation tables for a corresponding mixed-color display. This allows the sub-pixel to be compensated to be displayed according to the corresponding grayscale, ensuring that the display grayscale of the sub-pixel to be compensated includes not only monochrome correction but also mixed-color correction. This achieves uniformity compensation for non-charging images based on monochrome sub-pixel correction, while also achieving uniformity compensation for charging images based on mixed-color sub-pixel correction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of a process for compensating sub-pixels based on a compensation table corresponding to a monochrome display screen, provided in an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the display panel provided in an embodiment of the present invention;

[0019] Figures 3A-3C This is a flowchart of the display compensation method provided in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the hardware architecture of the debugging application provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0023] Specifically, Figure 1 This is a flowchart illustrating the process of compensating sub-pixels based on a compensation table corresponding to a monochrome display screen, provided in an embodiment of the present invention. The size of the compensation table corresponding to the monochrome sub-pixel correction corresponds to the resolution of the entire panel. The compensation table includes a compensation value for each sub-pixel. For example, when the display panel has an Ultra High Definition (UHD) resolution, the compensation table size is 3840*2160. The compensation value corresponding to each sub-pixel is: Dc = Di + Δ1. For the input grayscale Di corresponding to the sub-pixel, the compensation table obtained based on the monochrome display screen is called to obtain the compensation value Δ1 for the monochrome sub-pixel. This compensation is then used to compensate for the input grayscale Di corresponding to the sub-pixel, resulting in the display grayscale Dc corresponding to the sub-pixel, which is then used to control the sub-pixel to display according to the display grayscale Dc.

[0024] Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention; the display panel includes a plurality of pixels PX, each of the pixels PX including at least a first sub-pixel SPX1, a second sub-pixel SPX2 and a third sub-pixel SPX3 arranged along the first direction y and having different light emission colors.

[0025] Optionally, the first sub-pixel SPX1 emits red light, the second sub-pixel SPX2 emits green light, and the third sub-pixel SPX3 emits blue light. It is understood that the colors and order of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 are not limited to this.

[0026] The first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 of the same pixel PX are electrically connected to the same data line DL, and the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 of the same pixel PX are electrically connected to different scan lines SL. The data line DL extends along the first direction y, and the scan line SL extends along the second direction x, which intersects the first direction y. That is, multiple sub-pixels SPX form a Tri-Gate architecture.

[0027] Optionally, two adjacent pixels PX in the first direction y are connected to two data lines DL, so that the two adjacent pixels PX in the first direction y receive the data signals transmitted by the two data lines DL. For example, the plurality of pixels PX includes a plurality of first pixels PX1 and a plurality of second pixels PX2, the plurality of first pixels PX1 and second pixels PX2 are alternately arranged in the first direction y and the second direction x, and the plurality of data lines DL includes a plurality of first data lines DL1 and a plurality of second data lines DL2. In this configuration, multiple first pixels PX1 and multiple second pixels PX2 are alternately arranged in the first direction y (i.e., a second pixel PX2 is arranged between two adjacent first pixels PX1 in the first direction y, and a first pixel PX1 is arranged between two adjacent second pixels PX2). Multiple first data lines DL and multiple second data lines DL are alternately arranged in the second direction x (i.e., a second data line DL2 is arranged between two adjacent first data lines DL1 in the second direction x, and a first data line DL1 is arranged between two adjacent second data lines DL2). Each first data line DL1 is electrically connected to multiple first pixels PX1 located on both sides of it, and each second data line DL2 is electrically connected to multiple second pixels PX2 located on both sides of it, thereby connecting multiple first pixels PX1 and multiple second pixels PX2 located in the same column to two data lines DL.

[0028] Figures 3A-3C This is a flowchart of a display compensation method provided in an embodiment of the present invention. The present invention provides a display compensation method for a display panel, comprising:

[0029] A first compensation value is generated based on the input grayscale corresponding to the sub-pixel to be compensated and multiple first display compensation tables under the corresponding monochrome display screen; and a second compensation value is generated based on the input grayscale corresponding to the sub-pixel to be compensated and multiple second display compensation tables under the corresponding mixed color display screen.

[0030] Based on the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated, a display grayscale corresponding to the sub-pixel to be compensated is generated.

[0031] The sub-pixel to be compensated is controlled to be displayed according to the corresponding display grayscale.

[0032] By generating a display grayscale corresponding to the sub-pixel to be compensated based on the input grayscale corresponding to the sub-pixel to be compensated, multiple first display compensation tables under the corresponding monochrome display screen, and multiple second display compensation tables under the corresponding mixed color display screen, the display grayscale of the sub-pixel to be compensated is controlled to display according to the corresponding display grayscale. This ensures that the display grayscale of the sub-pixel to be compensated includes not only monochrome correction but also mixed color correction. This allows for uniformity compensation of non-charging screens based on monochrome sub-pixel correction, while also achieving uniformity compensation of charging screens based on mixed color sub-pixel correction.

[0033] Optionally, a plurality of the first display compensation tables and a plurality of the second display compensation tables may be pre-stored in a storage module.

[0034] Optionally, the storage module includes volatile or non-volatile memory.

[0035] Optionally, the control module can read data from multiple first display compensation tables and multiple second display compensation tables stored in the storage module, and generate the first compensation value or the second compensation value based on the input grayscale of the sub-pixel to be compensated and the data read from the storage module.

[0036] Optionally, the control module can generate the display grayscale based on the first compensation value and the second compensation value, and control the sub-pixel to be compensated to be displayed according to the display grayscale.

[0037] Optionally, the control module includes a processor, a timing controller, a source driver chip, etc.

[0038] Optionally, at least one of the first display compensation tables can be selected from multiple first display compensation tables by combining the coordinate information of the sub-pixel to be compensated with the input gray level corresponding to the sub-pixel to be compensated, thereby obtaining the first compensation value based on the selected first display compensation table.

[0039] Accordingly, please continue reading Figure 3BThe step of generating a first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple first display compensation tables under the corresponding monochrome display screen includes:

[0040] Based on the input gray level corresponding to the sub-pixel to be compensated, select the first display compensation table corresponding to the input gray level from multiple first display compensation tables to serve as the first target display compensation table;

[0041] The first compensation value is generated based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table.

[0042] Optionally, the number of selected first display compensation tables can be determined based on the input grayscale corresponding to the sub-pixel to be compensated. If the input grayscale corresponding to the sub-pixel to be compensated is equal to one of the binding point grayscales corresponding to multiple first display tables, then the first display table corresponding to the binding point grayscale equal to the input grayscale corresponding to the sub-pixel to be compensated can be selected as the first target display compensation table. If the input grayscale corresponding to the sub-pixel to be compensated is not equal to any one of the binding point grayscales corresponding to multiple first display tables, then two binding point grayscales can be selected from the multiple binding point grayscales as target binding point grayscales, such that the input grayscale corresponding to the sub-pixel to be compensated is between the two target binding point grayscales, and the first display table corresponding to the two target binding point grayscales is used as the first target display compensation table.

[0043] Accordingly, please continue reading Figure 3C The step of selecting, based on the input grayscale corresponding to the sub-pixel to be compensated, a first display compensation table corresponding to the input grayscale from a plurality of first display compensation tables as the first target display compensation table includes:

[0044] Based on the input grayscale corresponding to the sub-pixel to be compensated, determine whether the input grayscale of the sub-pixel to be compensated is equal to one of the binding point grayscales corresponding to multiple first display compensation tables;

[0045] When the input grayscale of the sub-pixel to be compensated is equal to one of the binding point grayscales corresponding to the plurality of first display compensation tables, the binding point grayscale that is equal to the input grayscale of the sub-pixel to be compensated is taken as the target binding point grayscale, and the first display compensation table corresponding to the target binding point grayscale is taken as the first target display compensation table.

[0046] Accordingly, please continue reading Figure 3CIf the compensation values ​​included in the first display compensation table are stored in units of sub-pixels, then the step of generating the first compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table includes:

[0047] The compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table is used as the first compensation value.

[0048] Accordingly, please continue reading Figure 3C If the compensation values ​​included in the first display compensation table are stored in units of blocks (each block corresponds to multiple sub-pixels), then the step of generating the first compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table includes:

[0049] Based on the coordinate information of the sub-pixel to be compensated, a block corresponding to the coordinate information of the sub-pixel to be compensated is selected in the first target display compensation table as a target block, and the compensation value corresponding to the target block is used as the first compensation value.

[0050] Alternatively, a block region (such as the region corresponding to a 3*3 sub-pixel) can be defined centered on the coordinate information of the sub-pixel to be compensated, and the first compensation value can be obtained by linear interpolation of the vertices of the block region corresponding to the compensation values ​​in the first target display compensation table.

[0051] Besides the case where the input grayscale of the sub-pixel to be compensated is equal to one of the binding point grayscales corresponding to the plurality of first display compensation tables, there is also a case where the input grayscale of the sub-pixel to be compensated is not equal to any of the binding point grayscales corresponding to the plurality of first display compensation tables. Accordingly, please continue to refer to Figure 3C After the step of determining whether the input grayscale of the sub-pixel to be compensated is equal to one of the binding point grayscales corresponding to a plurality of the first display compensation tables based on the input grayscale corresponding to the sub-pixel to be compensated, the method further includes:

[0052] When the input grayscale of the sub-pixel to be compensated is not equal to any one of the binding point grayscales corresponding to the plurality of first display compensation tables, two binding point grayscales are selected from the plurality of binding point grayscales corresponding to the plurality of first display compensation tables as the target binding point grayscales, and the first display compensation table corresponding to the two target binding point grayscales is used as the first target display compensation table. The input grayscale of the sub-pixel to be compensated is between the two target binding point grayscales. Optionally, the difference between the input grayscale of the sub-pixel to be compensated and the two target binding point grayscales is less than the difference between the input grayscale of the sub-pixel to be compensated and the remaining binding point grayscales.

[0053] Accordingly, please continue reading Figure 3C The step of generating the first compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table includes:

[0054] Based on the coordinate information of the sub-pixel to be compensated, a compensation value corresponding to the coordinate information of the sub-pixel to be compensated is selected as a reference compensation value from the two first target display compensation tables;

[0055] The first compensation value is generated based on the two reference compensation values.

[0056] Optionally, if the compensation values ​​included in the first display compensation table are stored in units of sub-pixels, then the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table is the reference compensation value. If the compensation values ​​included in the first display compensation table are stored in units of blocks, then the block corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table is the target block, and the compensation value corresponding to the target block is the reference compensation value. Optionally, a region of the block is delineated centered on the sub-pixel to be compensated, and the reference compensation value is obtained by linear interpolation of the vertices of the block region corresponding to the compensation values ​​in the first target display compensation table.

[0057] Optionally, the first compensation value can be obtained by linear interpolation of the two reference compensation values.

[0058] Similarly, the coordinate information of the sub-pixel to be compensated, combined with the corresponding input grayscale, can be used to select at least one second display compensation table from a plurality of second display compensation tables, thereby obtaining the second compensation value based on the selected second display compensation table. However, considering that the colors of adjacent rows of sub-pixels are different under the Tri-Gate architecture, the display grayscale of adjacent rows of sub-pixels will vary. Therefore, the coordinate information of the sub-pixel to be compensated, combined with the corresponding input grayscale, and the display grayscale of the sub-pixel (referred to as the reference sub-pixel) connected to the same data line as the sub-pixel to be compensated and located in the row preceding the row of the sub-pixel to be compensated, can be used to select a second display compensation table from a plurality of second display compensation tables that conforms to the grayscale variation rules of the sub-pixel to be compensated and the reference sub-pixel, thereby obtaining the second compensation value based on the selected second display compensation table.

[0059] Accordingly, please continue reading Figure 3B The step of generating a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple second display compensation tables under the corresponding color mixing display screen includes:

[0060] Based on the input grayscale corresponding to the sub-pixel to be compensated, the relationship between the reference display grayscale and the input grayscale corresponding to the sub-pixel to be compensated is determined, so as to select a plurality of second display compensation tables corresponding to the relationship between the reference display grayscale and the input grayscale as a reference compensation group; wherein, the reference display grayscale is the display grayscale of the reference sub-pixel, the reference sub-pixel is located in the row before the row where the sub-pixel to be compensated is located, and is electrically connected to the sub-pixel to be compensated on the same data line;

[0061] Based on the input grayscale corresponding to the sub-pixel to be compensated, the second display compensation table corresponding to the input grayscale is selected from the reference compensation group as the second target display compensation table;

[0062] The second compensation value is generated based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table.

[0063] Optionally, the relationship between the first binding point gray level corresponding to the reference sub-pixel and the second binding point gray level corresponding to the sub-pixel can be determined by judging whether the input gray level corresponding to the sub-pixel to be compensated is less than the display gray level corresponding to the reference sub-pixel. Then, a second display compensation table that conforms to the gray level change law of the sub-pixel to be compensated and the reference sub-pixel can be selected from multiple second display compensation tables.

[0064] Accordingly, please continue reading Figure 3C The step of determining the relationship between a reference display grayscale and the input grayscale corresponding to the sub-pixel to be compensated, based on the input grayscale corresponding to the sub-pixel to be compensated, and selecting multiple second display compensation tables corresponding to the relationship between the reference display grayscale and the input grayscale as a reference compensation group, includes:

[0065] Based on the input gray level corresponding to the sub-pixel to be compensated, determine whether the reference display gray level is greater than the input gray level;

[0066] When the reference display grayscale is greater than the input grayscale, it is determined that the first binding point grayscale corresponding to the reference sub-pixel is greater than the second binding point grayscale corresponding to the sub-pixel to be compensated.

[0067] Select multiple second display compensation tables whose corresponding first binding point grayscale is greater than the second binding point grayscale as the reference compensation group.

[0068] During the debugging phase, the first binding point grayscale is applied to the reference sub-pixel, and thus the first binding point grayscale corresponds to the reference sub-pixel; during the debugging phase, the second binding point grayscale is applied to the sub-pixel to be compensated, and thus the second binding point grayscale corresponds to the reference sub-pixel.

[0069] Accordingly, please continue reading Figure 3C After the step of determining whether the reference display grayscale is greater than the input grayscale based on the input grayscale corresponding to the sub-pixel to be compensated, the method further includes:

[0070] When the reference display grayscale is less than the input grayscale, it is determined that the first binding point grayscale corresponding to the reference sub-pixel is less than the second binding point grayscale corresponding to the sub-pixel to be compensated.

[0071] Select a plurality of second display compensation tables whose corresponding gray levels of the first binding point are smaller than those of the second binding point, as the reference compensation group.

[0072] After determining the reference compensation group, the second compensation value can be obtained based on the input gray level corresponding to the sub-pixel to be compensated and the coordinate information corresponding to the sub-pixel to be compensated.

[0073] Accordingly, please continue reading Figure 3C The step of selecting the second display compensation table corresponding to the input grayscale from the reference compensation group based on the input grayscale corresponding to the sub-pixel to be compensated, as the second target display compensation table, includes:

[0074] Based on the input gray level corresponding to the sub-pixel to be compensated, determine whether the reference display gray level corresponding to the reference sub-pixel is equal to one of the first binding point gray levels corresponding to multiple second display compensation tables;

[0075] When the reference display grayscale corresponding to the reference sub-pixel is equal to one of the first binding point grayscales corresponding to multiple second display compensation tables, the first binding point grayscale that is equal to the reference display grayscale corresponding to the reference sub-pixel is taken as the first target binding point grayscale; and it is determined whether the input grayscale of the sub-pixel to be compensated is equal to one of the second binding point grayscales corresponding to multiple second display compensation tables.

[0076] When the input gray level of the sub-pixel to be compensated is equal to one of the second binding point gray levels corresponding to a plurality of second display compensation tables, the second binding point gray level that is equal to the input gray level corresponding to the sub-pixel to be compensated is taken as the second target binding point gray level, and the second display compensation table corresponding to the first target binding point gray level and the second target binding point gray level is taken as the second target compensation table.

[0077] Accordingly, please continue reading Figure 3C If the compensation values ​​included in the second display compensation table are stored in units of sub-pixels, then the step of generating the second compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table includes:

[0078] The compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table is used as the second compensation value.

[0079] Accordingly, please continue reading Figure 3C If the compensation values ​​included in the second display compensation table are stored in blocks, then the step of generating the second compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table includes:

[0080] Based on the coordinate information of the sub-pixel to be compensated, a block corresponding to the coordinate information of the sub-pixel to be compensated is selected as the target block in the second target display compensation table, and the compensation value corresponding to the target block is used as the second compensation value.

[0081] Alternatively, a block area can be defined centered on the coordinate information of the sub-pixel to be compensated, and the second compensation value can be obtained by linear interpolation of the vertices of the block area corresponding to the compensation values ​​in the second target display compensation table.

[0082] Besides the case where the reference display grayscale corresponding to the reference sub-pixel is equal to one of the first binding point grayscales corresponding to multiple second display compensation tables, and the input grayscale of the sub-pixel to be compensated is equal to one of the second binding point grayscales corresponding to multiple second display compensation tables, the case also includes the case where the reference display grayscale corresponding to the reference sub-pixel is equal to one of the first binding point grayscales corresponding to multiple second display compensation tables, and the input grayscale of the sub-pixel to be compensated is not equal to any one of the second binding point grayscales corresponding to multiple second display compensation tables. Accordingly, please continue to refer to... Figure 3C After the step of determining whether the input grayscale of the sub-pixel to be compensated is equal to one of the second binding point grayscales corresponding to the multiple second display compensation tables when the reference display grayscale corresponding to the reference sub-pixel is equal to one of the first binding point grayscales corresponding to the multiple second display compensation tables, the method further includes:

[0083] When the input grayscale of the sub-pixel to be compensated is not equal to any one of the second binding point grayscales corresponding to the plurality of second display compensation tables, two second binding point grayscales are selected from the plurality of second binding point grayscales corresponding to the plurality of second display compensation tables as the second target binding point grayscales, and the second display table corresponding to the first target binding point grayscale and the two second target binding point grayscales is used as the second target display compensation table. The input grayscale corresponding to the sub-pixel to be compensated is between the two second target binding point grayscales. Optionally, the difference between the input grayscale corresponding to the sub-pixel to be compensated and the two second target binding point grayscales is less than the difference between the input grayscale corresponding to the sub-pixel to be compensated and the remaining second binding point grayscales.

[0084] Accordingly, please continue reading Figure 3C The step of generating the second compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table includes:

[0085] Based on the coordinate information of the sub-pixel to be compensated, a compensation value corresponding to the coordinate information of the sub-pixel to be compensated is selected as a reference compensation value from the two second target display compensation tables;

[0086] The second compensation value is generated based on the two reference compensation values.

[0087] Optionally, if the compensation values ​​included in the second display compensation table are stored in units of sub-pixels, then the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table is the reference compensation value. If the compensation values ​​included in the second display compensation table are stored in units of blocks, then the block corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table is the target block, and the compensation value corresponding to the target block is the reference compensation value. Optionally, a region of a block is delineated centered on the sub-pixel to be compensated, and the reference compensation value is obtained by linear interpolation of the vertices of the block region with the compensation values ​​in the second target display compensation table.

[0088] Optionally, the second compensation value can be obtained by linear interpolation of the two reference compensation values.

[0089] It is understandable that this also includes situations where the reference display grayscale corresponding to the reference sub-pixel is not equal to any one of the first binding point grayscales corresponding to the plurality of second display compensation tables, the input grayscale of the sub-pixel to be compensated is equal to one of the second binding point grayscales corresponding to the plurality of second display compensation tables, or the input grayscale of the sub-pixel to be compensated is not equal to any one of the second binding point grayscales corresponding to the plurality of second display compensation tables. Accordingly, please continue to refer to... Figure 3C After the step of determining whether the reference display grayscale corresponding to the reference sub-pixel is equal to one of the first binding point grayscales corresponding to multiple second display compensation tables based on the input grayscale corresponding to the sub-pixel to be compensated, the method further includes:

[0090] When the reference display grayscale corresponding to the reference sub-pixel is not equal to any one of the first binding point grayscales corresponding to the plurality of second display compensation tables, two first binding point grayscales are selected as the first reference binding point grayscales from the plurality of first binding point grayscales corresponding to the plurality of second display compensation tables; wherein, the reference display grayscale corresponding to the reference sub-pixel is between the two first reference binding point grayscales. Optionally, the difference between the reference display grayscale corresponding to the reference sub-pixel and the two first reference binding point grayscales is less than the difference between the reference display grayscale corresponding to the reference sub-pixel and the remaining first binding point grayscales;

[0091] Based on the compensation values ​​of the gray levels of the first reference binding points corresponding to the gray levels of the multiple second binding points, compensation values ​​corresponding to the gray levels of the first target binding point and the multiple second binding points are obtained, so as to obtain multiple second display compensation tables corresponding to the gray levels of the first target binding point and the multiple second binding points; wherein, the gray level of the first target binding point is equal to the reference display gray level corresponding to the reference sub-pixel;

[0092] Determine whether the input grayscale of the sub-pixel to be compensated is equal to one of the grayscales of the second binding points corresponding to the multiple second display compensation tables;

[0093] When the input gray level of the sub-pixel to be compensated is equal to one of the second binding point gray levels corresponding to a plurality of second display compensation tables, the second binding point gray level that is equal to the input gray level corresponding to the sub-pixel to be compensated is taken as the second target binding point gray level, and the second display compensation table corresponding to the first target binding point gray level and the second target binding point gray level is taken as the second target compensation table.

[0094] When the input grayscale of the sub-pixel to be compensated is not equal to any one of the second binding point grayscales corresponding to the plurality of second display compensation tables, two binding point grayscales are selected from the plurality of second binding point grayscales corresponding to the plurality of second display compensation tables as the second target binding point grayscales, and the second display table corresponding to the first target binding point grayscale and the two second target binding point grayscales is used as the second target display compensation table. The input grayscale corresponding to the sub-pixel to be compensated is between the two second target binding point grayscales. Optionally, the difference between the input grayscale corresponding to the sub-pixel to be compensated and the two second target binding point grayscales is less than the difference between the input grayscale corresponding to the sub-pixel to be compensated and the remaining second binding point grayscales.

[0095] Optionally, compensation values ​​corresponding to the first target binding point gray level and the plurality of second binding point gray levels can be obtained by linear interpolation based on the compensation values ​​of each second binding point gray level corresponding to the two first reference binding point gray levels, so as to obtain a plurality of second display compensation tables corresponding to the first target binding point gray level and the plurality of second binding point gray levels.

[0096] Optionally, the sum of the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated can be calculated to obtain the display grayscale corresponding to the sub-pixel to be compensated.

[0097] However, in practical applications, the display grayscale corresponding to the sub-pixel to be compensated, obtained by summing the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated, cannot be applied to all display screens (i.e., some display screens have better compensation effects, while some display screens have poorer compensation effects). Therefore, the ratio of the first compensation value and the second compensation value is controlled.

[0098] Accordingly, in the step of generating a display grayscale corresponding to the sub-pixel to be compensated based on the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated, the display grayscale is obtained according to the formula: Dc=Di+α×Δ1+β×Δ2.

[0099] Wherein, Dc represents the display grayscale, Di represents the input grayscale; Δ1 represents the first compensation value, Δ2 represents the second compensation value; α represents the weight of the first compensation value, and β represents the weight of the second compensation value.

[0100] Wherein, α+β∈[0,2], to achieve compensation for the two dimensions of the display panel. α and β can be obtained through debugging experiments after the first compensation value and the second compensation value are determined.

[0101] Optionally, the emission color of the sub-pixel to be compensated is at least one of green, blue, and red.

[0102] Since the human eye is more sensitive to green light, the emission color of the sub-pixel to be compensated can be made green. By compensating only the sub-pixels with green emission color, the problem of display uniformity can be perceived to a greater extent. At the same time, the complexity of the compensation method can be reduced, thereby improving the compensation efficiency.

[0103] Furthermore, to further improve the compensation effect, the emission color of the sub-pixel to be compensated can also be red or blue (i.e., compensation is performed on sub-pixels with emission colors of red, blue, and green). Correspondingly, the plurality of first display compensation tables can include a plurality of first display compensation tables corresponding to red sub-pixels, a plurality of first display compensation tables corresponding to blue sub-pixels, and a plurality of first display compensation tables corresponding to green sub-pixels; the plurality of second display compensation tables can include a plurality of second display compensation tables corresponding to red sub-pixels, a plurality of second display compensation tables corresponding to blue sub-pixels, and a plurality of second display compensation tables corresponding to green sub-pixels. When compensating a red sub-pixel with an emission color of red, the plurality of first display compensation tables corresponding to the red sub-pixel are called to generate the first compensation value, and the plurality of second display compensation tables corresponding to the red sub-pixel are called to generate the second compensation value. Similarly, when compensating a blue sub-pixel with an emission color of blue, the plurality of first display compensation tables corresponding to the blue sub-pixel are called to generate the first compensation value, and the plurality of second display compensation tables corresponding to the blue sub-pixel are called to generate the second compensation value. Similarly, when compensating for a green sub-pixel whose emission color is green, the first compensation value is generated by calling multiple first display compensation tables corresponding to the green sub-pixel, and the second compensation value is generated by calling multiple second display compensation tables corresponding to the green sub-pixel.

[0104] Multiple first display compensation tables and multiple second display compensation tables can be obtained during the debugging phase.

[0105] Accordingly, before the step of generating the first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple first display compensation tables under the corresponding monochrome display screen, the following steps are included:

[0106] Under the monochrome display screen, acquire multiple brightness data of multiple sub-pixels of the display panel corresponding to different binding point gray levels;

[0107] Based on the difference between the brightness data and the desired brightness data of each of the multiple sub-pixels corresponding to the grayscale of the binding point under the monochrome display screen, multiple first display compensation tables corresponding to different grayscale of the binding point are generated.

[0108] The monochrome display screen includes a solid color display screen (R=G=B, that is, the gray levels of the red sub-pixels, green sub-pixels and blue sub-pixels are equal).

[0109] Optionally, brightness data corresponding to multiple sub-pixels can be collected under a solid color display screen, and then compensation values ​​corresponding to multiple sub-pixels can be obtained by gamma curve fitting (i.e., curve fitting of brightness values ​​corresponding to different grayscale screens with different binding points so that the fitted values ​​are close to the desired brightness values) to generate the first display compensation table.

[0110] Accordingly, before the step of generating a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple second display compensation tables under the corresponding color mixing display screen, the method includes:

[0111] Under the mixed color display screen, obtain the brightness data of multiple sub-pixels of the display panel;

[0112] Based on the difference between the brightness data of multiple sub-pixels and the reference brightness data in the mixed color display screen, multiple second display compensation tables are generated where the gray level of the first binding point is greater than the gray level of the second binding point, and multiple second display compensation tables are generated where the gray level of the first binding point is less than the gray level of the second binding point; wherein, the gray level of the first binding point corresponds to the reference sub-pixel, and the gray level of the second binding point corresponds to the sub-pixel to be compensated.

[0113] The mixed color display screen includes multiple sub-pixels with different emission colors, in which two sub-pixels have different gray levels and one sub-pixel has a gray level of 0 (e.g., R≠G, B=0; or R≠B, G=0; or B≠G, R=0). It may also include multiple sub-pixels with different emission colors and different gray levels (e.g., R≠G≠B).

[0114] Optionally, brightness data corresponding to multiple sub-pixels can be collected under a mixed color display screen, and then compensation values ​​corresponding to multiple sub-pixels can be obtained by gamma curve fitting (i.e., curve fitting of brightness values ​​of screens corresponding to different first binding point gray levels and second binding point gray levels, so that the fitted value approximates the reference brightness value), so as to generate multiple second display compensation tables.

[0115] Figure 4This is a schematic diagram of the hardware architecture of the debugging application provided in an embodiment of the present invention. Optionally, the brightness of the plurality of sub-pixels in the display panel can be detected by a brightness detection instrument to obtain brightness data corresponding to the plurality of pixels. Optionally, the brightness of the plurality of sub-pixels can be detected by a single-point brightness meter.

[0116] Optionally, compensation values ​​corresponding to the multiple sub-pixels can be obtained based on the brightness data corresponding to the multiple pixels using devices such as a computer (PC) and a graphics processing unit (PG). The compensation values ​​can be verified and adjusted using control circuits and driver chips integrated on circuit boards C / B, in conjunction with the computer (PC) and graphics processing unit (PG).

[0117] Figure 5 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. This application also provides a display device, including a display panel, a storage module and a control module.

[0118] The display panel includes a plurality of pixels PX. Each pixel PX includes at least a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3 arranged along a first direction y and emitting different colors. The first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 of the same pixel PX are electrically connected to the same data line DL. The first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 of the same pixel PX are electrically connected to different scan lines SL. The data line DL extends along the first direction y, and the scan line SL extends along a second direction x that intersects the first direction y.

[0119] The storage module 101 is electrically connected to the display panel, and is configured to store a plurality of first display compensation tables and a plurality of second display compensation tables. Optionally, the storage module 101 includes volatile or non-volatile memory.

[0120] The control module 102 is electrically connected to the display panel and the storage module 101. The control module 102 is configured to compensate the input gray level corresponding to the sub-pixel to be compensated according to a plurality of first display compensation tables and a plurality of second display compensation tables, so as to obtain the display gray level corresponding to the sub-pixel to be compensated, and control the sub-pixel to be compensated to be displayed according to the corresponding display gray level.

[0121] Optionally, the control module 102 includes a timing controller, a source driver chip, a gate driver chip, etc.

[0122] In this system, multiple first compensation data tables correspond to monochrome display screens, and multiple second display compensation tables correspond to mixed-color display screens; the sub-pixel to be compensated is one of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3. By simultaneously calling the display compensation tables corresponding to both monochrome and mixed-color display screens, compensation is made for the input grayscale corresponding to the sub-pixel to be compensated, thereby achieving compensation for the uniformity of both rechargeable and non-rechargeable display screens.

[0123] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will know that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A display compensation method for a display panel, characterized in that, include: A first compensation value is generated based on the input grayscale corresponding to the sub-pixel to be compensated and multiple first display compensation tables under the corresponding monochrome display screen. And generate a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple second display compensation tables under the corresponding color mixing display screen; Based on the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated, a display grayscale corresponding to the sub-pixel to be compensated is generated. The sub-pixel to be compensated is controlled to be displayed according to the corresponding display grayscale; The step of generating a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple second display compensation tables under the corresponding color mixing display screen includes: Based on the input grayscale corresponding to the sub-pixel to be compensated, the relationship between the reference display grayscale and the input grayscale corresponding to the sub-pixel to be compensated is determined, so as to select a plurality of second display compensation tables corresponding to the relationship between the reference display grayscale and the input grayscale as a reference compensation group; wherein, the reference display grayscale is the display grayscale of the reference sub-pixel, the reference sub-pixel is located in the row before the row where the sub-pixel to be compensated is located, and is electrically connected to the sub-pixel to be compensated on the same data line; Based on the input grayscale corresponding to the sub-pixel to be compensated, the second display compensation table corresponding to the input grayscale is selected from the reference compensation group as the second target display compensation table; The second compensation value is generated based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table.

2. The display compensation method according to claim 1, characterized in that, The step of generating a first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple first display compensation tables under the corresponding monochrome display screen includes: Based on the input gray level corresponding to the sub-pixel to be compensated, select the first display compensation table corresponding to the input gray level from multiple first display compensation tables to serve as the first target display compensation table; The first compensation value is generated based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the first target display compensation table.

3. The display compensation method according to claim 1, characterized in that, The step of determining the relationship between a reference display grayscale and the input grayscale corresponding to the sub-pixel to be compensated based on the input grayscale corresponding to the sub-pixel to be compensated, and selecting multiple second display compensation tables corresponding to the relationship between the reference display grayscale and the input grayscale as a reference compensation group, includes: Based on the input gray level corresponding to the sub-pixel to be compensated, determine whether the reference display gray level is greater than the input gray level; When the reference display grayscale is greater than the input grayscale, it is determined that the first binding point grayscale corresponding to the reference sub-pixel is greater than the second binding point grayscale corresponding to the sub-pixel to be compensated. Select multiple second display compensation tables whose corresponding first binding point grayscale is greater than the second binding point grayscale as the reference compensation group.

4. The display compensation method according to claim 3, characterized in that, After the step of determining whether the reference display grayscale is greater than the input grayscale based on the input grayscale corresponding to the sub-pixel to be compensated, the method further includes: When the reference display grayscale is less than the input grayscale, it is determined that the first binding point grayscale corresponding to the reference sub-pixel is less than the second binding point grayscale corresponding to the sub-pixel to be compensated. Select a plurality of second display compensation tables whose corresponding gray levels of the first binding point are smaller than those of the second binding point, as the reference compensation group.

5. The display compensation method according to claim 1, characterized in that, In the step of generating a display grayscale corresponding to the sub-pixel to be compensated based on the first compensation value, the second compensation value, and the input grayscale corresponding to the sub-pixel to be compensated, the display grayscale is based on the formula: Dc=Di+α× 1+β× 2. Obtain; Wherein, Dc represents the display grayscale, and Di represents the input grayscale; 1 represents the first compensation value. 2 represents the second compensation value; α represents the weight of the first compensation value; and β represents the weight of the second compensation value.

6. The display compensation method according to claim 1, characterized in that, The light emission color of the sub-pixel to be compensated is green.

7. The display compensation method according to claim 1, characterized in that, Before the step of generating the first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple first display compensation tables under the corresponding monochrome display screen, the following steps are included: Under the monochrome display screen, acquire multiple brightness data of multiple sub-pixels of the display panel corresponding to different binding point gray levels; Based on the difference between the brightness data and the desired brightness data of each of the multiple sub-pixels corresponding to the grayscale of the binding point under the monochrome display screen, multiple first display compensation tables corresponding to different grayscale of the binding point are generated.

8. The display compensation method according to claim 1, characterized in that, Before the step of generating a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and multiple second display compensation tables under the corresponding mixed color display screen, the following steps are included: Under the mixed color display screen, obtain the brightness data of multiple sub-pixels of the display panel; Based on the difference between the brightness data of multiple sub-pixels and the reference brightness data in the mixed color display screen, multiple second display compensation tables are generated where the gray level of the first binding point is greater than the gray level of the second binding point, and multiple second display compensation tables are generated where the gray level of the first binding point is less than the gray level of the second binding point; wherein, the gray level of the first binding point corresponds to the reference sub-pixel, and the gray level of the second binding point corresponds to the sub-pixel to be compensated.

9. A display device, characterized in that, include: The display panel includes a plurality of pixels. Each pixel includes at least a first sub-pixel, a second sub-pixel, and a third sub-pixel arranged along a first direction and emitting different colors. The first sub-pixel, the second sub-pixel, and the third sub-pixel of the same pixel are electrically connected to the same data line. The first sub-pixel, the second sub-pixel, and the third sub-pixel of the same pixel are electrically connected to different scan lines. The data line extends along the first direction, and the scan line extends along a second direction that intersects the first direction. The storage module, electrically connected to the display panel, is configured to store a plurality of first display compensation tables and a plurality of second display compensation tables; The control module, electrically connected to the display panel and the storage module, is configured to generate a first compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of first display compensation tables, generate a second compensation value based on the input grayscale corresponding to the sub-pixel to be compensated and a plurality of second display compensation tables, obtain a display grayscale corresponding to the sub-pixel to be compensated based on the first compensation value, the second compensation value and the input grayscale corresponding to the sub-pixel to be compensated, and control the sub-pixel to be compensated to display according to the corresponding display grayscale; In this configuration, multiple first display compensation tables correspond to monochrome display images, and multiple second display compensation tables correspond to mixed color display images; the sub-pixel to be compensated is one of the first sub-pixel, the second sub-pixel, and the third sub-pixel; the control module is configured to determine the relationship between a reference display grayscale and the input grayscale corresponding to the sub-pixel to be compensated based on the input grayscale corresponding to the sub-pixel to be compensated, and to select multiple second display compensation tables corresponding to the relationship between the reference display grayscale and the input grayscale as a reference compensation group; to select the second display compensation table corresponding to the input grayscale in the reference compensation group based on the input grayscale corresponding to the sub-pixel to be compensated as a second target display compensation table; and to generate a second compensation value based on the compensation value corresponding to the coordinate information of the sub-pixel to be compensated in the second target display compensation table; wherein the reference display grayscale is the display grayscale of the reference sub-pixel, the reference sub-pixel is located in the row before the row where the sub-pixel to be compensated is located, and is electrically connected to the sub-pixel to be compensated on the same data line.

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