Display panel and grayscale compensation method

Abstract

The present application discloses a display panel and a grayscale compensation method. The grayscale compensation method first divides the display area of the display panel into a first display partition and a second display partition, and then compensates the grayscale of each sub-pixel in the second display partition with the average luminance of at least one second display partition as the target luminance. This can not only improve the luminance uniformity of the display area, but also reduce the required grayscale compensation data.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel and a grayscale compensation method. Background Art

[0002] The development of current display technologies is also advancing rapidly. At the same time, there are still defects in display panels that need to be continuously improved. For example, the brightness uniformity cannot achieve the predetermined target. Especially in the central display area of the display panel, the central display area can be the middle part of the display panel in the width direction and / or the length direction. The display brightness of this middle part is darker or brighter than that of the surrounding parts, resulting in poor brightness uniformity of the display panel and affecting the display quality. Summary of the Invention

[0003] This application provides a display panel and a grayscale compensation method to alleviate the technical problem of requiring a large amount of grayscale compensation data in the process of brightness uniformity compensation.

[0004] In a first aspect, this application provides a grayscale compensation method for a display panel, which includes: configuring the display area of the display panel into at least one first display partition and at least one second display partition; determining the average brightness of at least one second display partition as the target brightness; compensating the grayscale of each sub-pixel in at least one second display partition until the target brightness is reached.

[0005] In some embodiments, the grayscale compensation method further includes: configuring the display area into one first display partition and eight second display partitions, where the area of the first display partition is the same as that of at least one second display partition; constructing the first display partition and the eight second display partitions in an array distribution; determining the average brightness of one of the first second display partition and the third second display partition from left to right in the second row as the target brightness.

[0006] In some embodiments, the grayscale compensation method further includes: determining the resolution of the display panel; based on the resolution, dividing each second display partition into at least one display block, and the size of the resolution is proportional to the number of display blocks in the same second display partition.

[0007] In some embodiments, the grayscale compensation method further includes: determining the grayscale gain coefficient corresponding to each color sub-pixel in each display block; separately adjusting the grayscale gain coefficient corresponding to each color sub-pixel until the target brightness is reached.

[0008] The process of separately adjusting the grayscale gain coefficient corresponding to each color sub-pixel until the target brightness is reached is as follows:

[0009] Rx_Block_output = Rx_input * Rx_Gain

[0010] Gx_Block_output = Gx_input * Gx_Gain

[0011] Bx_Block_output = Bx_input * Bx_Gain

[0012] Wherein, Rx_input, Gx_input, and Bx_input are used to represent the initial gray levels of the red sub-pixels, green sub-pixels, and blue sub-pixels in the display block at position x, respectively; Rx_Gain, Gx_Gain, and Bx_Gain are used to represent the gray level gain coefficients of the red sub-pixels, green sub-pixels, and blue sub-pixels in the display block at position x, respectively; Rx_Block_output, Gx_Block_output, and Bx_Block_output are used to represent the target gray levels of the red sub-pixels, green sub-pixels, and blue sub-pixels in the display block at position x, respectively, and the target gray level corresponds to the target brightness.

[0013] In some embodiments, the gray level compensation method further includes: determining the area where 2N rows and / or columns of sub-pixels starting from the junction in two adjacent display blocks is the junction area; processing the gray levels corresponding to the target brightness of the sub-pixels located in the junction area by interpolation method.

[0014] In some embodiments, the process of processing the gray levels corresponding to the target brightness of the sub-pixels located in the junction area by interpolation method is as follows:

[0015] Rm_Block_output1 = (Rx_Block_output - Rx+1_Block_output) / 2N * m +

[0016] Rx_Block_output

[0017] Gm_Block_output1 = (Gx_Block_output - Gx+1_Block_output) / 2N * m +

[0018] Gx_Block_output

[0019] Bm_Block_output1 = (Bx_Block_output - Bx+1_Block_output) / 2N * m +

[0020] Bx_Block_output

[0021] Wherein, N is the number of rows or columns of sub-pixels starting from the junction and located in the junction region in the corresponding display block, and m is the row sorting or column sorting of the sub-pixels starting from the junction; Rm_Block_output1, Gm_Block_output1, and Bm_Block_output1 are respectively used to represent the gray scale of the red sub-pixels of the m-th row / column sub-pixels after interpolation processing, the gray scale of the green sub-pixels of the m-th row / column sub-pixels after interpolation processing, and the gray scale of the blue sub-pixels of the m-th row / column sub-pixels after interpolation processing; Rx+1_Block_output, Gx+1_Block_output, and Bx+1_Block_output are respectively used to represent the target gray scale of the red sub-pixels, the target gray scale of the green sub-pixels, and the target gray scale of the blue sub-pixels in the display block at the x+1 position; and the display block where the m-th row / column sub-pixels are located is adjacent to the display block at the x position and the display block at the x+1 position.

[0022] In some embodiments, the gray scale compensation method further includes: determining the corresponding sub-pixels repeatedly processed by the interpolation method in the junction region; equalizing the gray scale of the corresponding sub-pixels repeatedly processed by the interpolation method.

[0023] In some embodiments, the process of equalizing the gray scale of the corresponding sub-pixels repeatedly processed by the interpolation method is as follows:

[0024] Rm_Block_output = (Rm_Block_output1 + Rm+1_Block_output1) / 2

[0025] Gm_Block_output = (Gm_Block_output1 + Gm+1_Block_output1) / 2

[0026] Bm_Block_output = (Bm_Block_output1 + Bm+1_Block_output1) / 2

[0027] Among them, Rm_Block_output, Gm_Block_output, and Bm_Block_output are used to represent the averaged gray levels of the red sub-pixels, the averaged gray levels of the green sub-pixels, and the averaged gray levels of the blue sub-pixels that have been repeatedly processed by the interpolation method in the m-th row / column, respectively; Rm+1_Block_output1, Gm+1_Block_output1, and Bm+1_Block_output1 are used to represent the gray levels of the red sub-pixels after interpolation processing of the sub-pixels in the (m + 1)-th row / column, the gray levels of the green sub-pixels after interpolation processing of the sub-pixels in the (m + 1)-th row / column, and the gray levels of the blue sub-pixels after interpolation processing of the sub-pixels in the (m + 1)-th row / column, respectively.

[0028] In some embodiments, before the step of compensating the gray levels of the sub-pixels in at least one second display partition until the target brightness, the gray level compensation method further includes: determining whether the image to be displayed is a specified type of frame image, where the specified type of frame image is a frame image with a brightness uniformity less than or equal to a preset ratio and normal visual effects; if so, performing the step of compensating the gray levels of the sub-pixels in at least one second display partition until the target brightness; if not, directly displaying the image to be displayed.

[0029] In a second aspect, the present application provides a display panel, which includes a timing controller. The timing controller stores a gray level compensation table, and the gray level compensation table is made according to the gray level compensation method in the above at least one embodiment.

[0030] The display panel and the gray level compensation method provided by the present application first divide the display area of the display panel into a first display partition and a second display partition, and then compensate the gray levels of the sub-pixels in at least one second display partition with the average brightness of at least one second display partition as the target brightness, reducing the brightness difference between the first display partition and the second display partition. This can not only improve the brightness uniformity of the display area, but also reduce the required gray level compensation data because only the sub-pixels in the second display partition are gray level compensated. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following will, by describing the specific embodiments of the present application in detail with reference to the accompanying drawings, make the technical solutions and other beneficial effects of the present application obvious.

[0032] Figure 1 It is a first flow chart of the gray level compensation method provided by the embodiment of the present application.

[0033] Figure 2 It is a first layout diagram of the first display partition and the second display partition provided by the embodiment of the present application.

[0034] Figure 3 The second layout schematic diagram of the first display partition and the second display partition provided by the embodiment of the present application.

[0035] Figure 4 The third layout schematic diagram of the first display partition and the second display partition provided by the embodiment of the present application.

[0036] Figure 5 The layout schematic diagram of the junction area provided by the embodiment of the present application.

[0037] Figure 6 The distribution schematic diagram of the interpolation repeated processing area provided by the embodiment of the present application.

[0038] Figure 7 The second process schematic diagram of the grayscale compensation method provided by the embodiment of the present application.

[0039] Figure 8 The third process schematic diagram of the grayscale compensation method provided by the embodiment of the present application.

[0040] Figure 9 The fourth process schematic diagram of the grayscale compensation method provided by the embodiment of the present application.

[0041] Figure 10 The structural schematic diagram of the display panel provided by the embodiment of the present application.

[0042] Figure 11 The structural schematic diagram of the pixel circuit provided by the embodiment of the present application.

[0043] Figure 12 is Figure 11 The timing schematic diagram of the data signal and the gate potential of the driving transistor shown.

[0044] Figure 13 A vertical crosstalk phenomenon provided by the embodiment of the present application.

[0045] Figure 14 is Figure 11 The relationship schematic diagram of Cgs and Vgs of the corresponding transistor in.

[0046] Figure 15 A horizontal crosstalk phenomenon provided by the embodiment of the present application. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0048] In view of the technical problem that a large number of gray-scale compensation data are required in the above-mentioned brightness uniformity compensation process, the present embodiment provides a gray-scale compensation method for a display panel. Please refer to Figures 1 to 15 , as Figure 1 , Figure 4 shown. The gray-scale compensation method includes the following steps:

[0049] Step S10: Configure the display area of the display panel into at least one first display partition and at least one second display partition.

[0050] Step S20: Determine the average brightness of at least one second display partition as the target brightness.

[0051] Step S30: Compensate the gray levels of each sub-pixel in at least one second display partition until the target brightness is reached.

[0052] It can be understood that in the gray-scale compensation method provided in the present embodiment, by first dividing the display area AA of the display panel into a first display partition and a second display partition, and then compensating the gray levels of each sub-pixel in at least one second display partition with the average brightness of at least one second display partition as the target brightness, the brightness difference between the first display partition and the second display partition is reduced, which can not only improve the brightness uniformity of the display area AA; but also since only the gray levels of the sub-pixels in the second display partition are compensated, the required gray-scale compensation data can be reduced.

[0053] It should be noted that in the present application, the number of the first display partitions and the number of the second display partitions are not specifically limited and can be correspondingly set according to needs.

[0054] For example, it can be but not limited to Figure 2 designating display partition 4 and display partition 6 as two different first display partitions; at least one of display partition 1, display partition 2, display partition 3, display partition 5, display partition 7, display partition 8, and display partition 9 as different second display partitions.

[0055] For another example, it can also be as Figure 3 designating display partition 1 and display partition 3 as two different first display partitions; at least one of display partition 2, display partition 4, display partition 5, display partition 6, display partition 7, display partition 8, and display partition 9 as different second display partitions.

[0056] In one embodiment, the grayscale compensation method further includes: configuring the display area AA into a first display partition and eight second display partitions, where the area of the first display partition is the same as that of at least one of the second display partitions; constructing the first display partition and the eight second display partitions into an array distribution; determining the average luminance of at least one of the first second display partition and the third second display partition from left to right in the second row as the target luminance.

[0057] It should be noted that, as Figures 4 to 6 shown, the first display partition may be display partition 5, and the eight second display partitions may be display partition 1, display partition 2, display partition 3, display partition 4, display partition 6, display partition 7, display partition 8, and display partition 9 respectively. The first second display partition from left to right in the second row is display partition 4, and the third second display partition from left to right in the second row is display partition 6.

[0058] It can be understood that as the number of each display partition increases, the accuracy of grayscale compensation is also higher, which is more conducive to achieving luminance uniformity; however, as the number of each display partition increases, the required grayscale compensation data also increases accordingly. In view of this, through multiple comparisons of experimental data in this embodiment, the configuration of dividing the display area AA of the display panel 100 into a first display partition and eight second display partitions can further achieve higher luminance uniformity with less grayscale compensation data.

[0059] Moreover, since display partition 4 and display partition 6 are both in the middle position in both the length direction and the width direction of the display panel, the average luminance of one of display partition 4 and display partition 6 is closer to the average luminance of the display area AA. That is to say, taking the average luminance of one of display partition 4 and display partition 6 as the target luminance can achieve as high luminance uniformity as possible with as small a grayscale compensation amount as possible.

[0060] In one embodiment, the grayscale compensation method further includes: determining the resolution of the display panel; based on the resolution, dividing each second display partition into at least one display block, and the size of the resolution is proportional to the number of display blocks in the same second display partition.

[0061] It should be noted that each of the above display blocks may include at least one row or at least one column of sub-pixels located in the corresponding display partition. Among them, it can be understood that the more the number of display blocks in the same second display partition, the higher the achievable grayscale compensation accuracy; and for a display panel with a larger resolution, its size is also larger. Therefore, configuring the size of the resolution to be proportional to the number of display blocks in the same second display partition can flexibly configure the grayscale compensation scheme of the present application, and display panels of different sizes can all achieve the required luminance uniformity, with a wide range of applications.

[0062] In one embodiment, the grayscale compensation method further includes: determining the grayscale gain coefficients corresponding to the sub-pixels of various colors in each display block; separately adjusting the grayscale gain coefficients corresponding to the sub-pixels of various colors until the target brightness is reached.

[0063] It should be noted that the above grayscale gain coefficients can be used to adjust the grayscale of the corresponding sub-pixels, and each grayscale corresponds to a brightness. Therefore, during the adjustment process, a suitable grayscale gain coefficient can be selected to configure a suitable grayscale for different sub-pixels, so as to achieve the corresponding target brightness.

[0064] The process of separately adjusting the grayscale gain coefficients corresponding to the sub-pixels of various colors until the target brightness is reached is as follows:

[0065] Rx_Block_output = Rx_input * Rx_Gain

[0066] Gx_Block_output = Gx_input * Gx_Gain

[0067] Bx_Block_output = Bx_input * Bx_Gain

[0068] Wherein, Rx_input, Gx_input, and Bx_input are used to represent the initial grayscale of the red sub-pixels, the initial grayscale of the green sub-pixels, and the initial grayscale of the blue sub-pixels in the display block at the x position in sequence; Rx_Gain, Gx_Gain, and Bx_Gain are used to represent the grayscale gain coefficients of the red sub-pixels, the grayscale gain coefficients of the green sub-pixels, and the grayscale gain coefficients of the blue sub-pixels in the display block at the x position in sequence; Rx_Block_output, Gx_Block_output, and Bx_Block_output are used to represent the target grayscale of the red sub-pixels, the target grayscale of the green sub-pixels, and the target grayscale of the blue sub-pixels in the display block at the x position in sequence, and the target grayscale corresponds to the target brightness.

[0069] It can be understood that this embodiment can enable each sub-pixel to perform grayscale compensation according to the color type, and can achieve higher grayscale compensation accuracy with a relatively simple grayscale compensation process.

[0070] In one embodiment, as Figure 5 shown, the grayscale compensation method further includes: determining the area where the 2N rows and / or columns of sub-pixels starting from the junction in two adjacent display blocks are located as the junction area; performing interpolation processing on the grayscale corresponding to the target brightness of each sub-pixel located in the junction area.

[0071] It should be noted that in this embodiment, the gray levels of the sub-pixels in the junction area between adjacent display blocks can be smoothed, so that the display brightness in this junction area transitions smoothly, further improving the brightness uniformity of the display.

[0072] In one embodiment, the process of interpolating the gray levels corresponding to the target brightness of the sub-pixels in the junction area is as follows:

[0073] Rm_Block_output1 = (Rx_Block_output - Rx+1_Block_output) / 2N*m +

[0074] Rx_Block_output

[0075] Gm_Block_output1 = (Gx_Block_output - Gx+1_Block_output) / 2N*m +

[0076] Gx_Block_output

[0077] Bm_Block_output1 = (Bx_Block_output - Bx+1_Block_output) / 2N*m +

[0078] Bx_Block_output

[0079] Where N is the number of rows or columns of the sub-pixels starting from the junction and located in the junction area in the corresponding display block, and m is the row sorting or column sorting of the sub-pixels starting from the junction; Rm_Block_output1, Gm_Block_output1, and Bm_Block_output1 are used to represent the gray levels of the red sub-pixels, the gray levels of the green sub-pixels, and the gray levels of the blue sub-pixels of the m-th row / column sub-pixels after being processed by the interpolation method, respectively; Rx+1_Block_output, Gx+1_Block_output, and Bx+1_Block_output are used to represent the target gray levels of the red sub-pixels, the target gray levels of the green sub-pixels, and the target gray levels of the blue sub-pixels in the display block at the x+1 position, respectively; and the display block where the m-th row / column sub-pixels are located is adjacent to the display block at the x position and the display block at the x+1 position.

[0080] In one embodiment, as Figure 6 shown, the gray level compensation method further includes: determining the corresponding sub-pixels in the junction area that are repeatedly processed by the interpolation method; equalizing the gray levels of the corresponding sub-pixels that are repeatedly processed by the interpolation method.

[0081] It should be noted that the above interpolation method will perform gray-scale transition compensation on Figure 6 region 11 in, which affects the brightness uniformity of the display. In view of this, it is necessary to average the gray scales of the corresponding sub-pixels that have been repeatedly processed by the interpolation method to weaken the gray-scale transition compensation of the corresponding sub-pixels and further improve the brightness uniformity of the display.

[0082] In one embodiment, the process of averaging the gray scales of the corresponding sub-pixels that have been repeatedly processed by the interpolation method is as follows:

[0083] Rm_Block_output = (Rm_Block_output1 + Rm+1_Block_output1) / 2

[0084] Gm_Block_output = (Gm_Block_output1 + Gm+1_Block_output1) / 2

[0085] Bm_Block_output = (Bm_Block_output1 + Bm+1_Block_output1) / 2

[0086] Among them, Rm_Block_output, Gm_Block_output, and Bm_Block_output are used to represent the averaged gray scales of the red sub-pixels, green sub-pixels, and blue sub-pixels that have been repeatedly processed by the interpolation method in the m-th row / column in sequence; Rm+1_Block_output1, Gm+1_Block_output1, and Bm+1_Block_output1 are used to represent the gray scales of the red sub-pixels, green sub-pixels, and blue sub-pixels that have been processed by the interpolation method in the (m + 1)-th row / column sub-pixels in sequence.

[0087] In one embodiment, as Figure 7 shown, before the step of compensating the gray scales of each sub-pixel in at least one second display partition until the target brightness, the gray-scale compensation method further includes: determining whether the to-be-displayed frame image is a specified type of frame image, where the specified type of frame image is a frame image with brightness uniformity less than or equal to a preset ratio and normal visual effect; if so, then execute the step of compensating the gray scales of each sub-pixel in at least one second display partition until the target brightness; if not, then directly display the to-be-displayed frame image.

[0088] It should be noted that the above preset ratio can be but is not limited to 1.5%, and can also be set to the ratio required by the customer.

[0089] In one embodiment, the gray scale compensation method can also be as Figure 8 The specific process shown: First, measure the brightness of eight second display partitions, then determine whether the brightness of each second display partition meets the specific requirements of brightness uniformity. If it meets, end without compensation; if not, set the number and coordinates of the display blocks. It can be understood that the position of the corresponding display blocks can be defined by positioning through the point coordinates of the four corners; then set the target brightness, and adjust the gray scale by changing the gray scale gain coefficient of each sub-pixel until the gray scale of the corresponding sub-pixel reaches the target brightness; finally, optimize the gray scale of each sub-pixel at the junction of adjacent display blocks. Among them, the optimization process can be, but is not limited to, the above-mentioned interpolation method and / or averaging method, etc., and can also be other methods that can improve brightness uniformity. Then, perform a brightness uniformity evaluation on the display after the optimization process to determine whether it meets the brightness uniformity.

[0090] In one embodiment, the gray scale compensation method can also be as Figure 9 The specific process shown: First, set the number and coordinates of the display blocks, then obtain the brightness of each second display partition or each display block by photographing the optical information of a specific picture, and accordingly set the corresponding target brightness, then calculate the brightness difference between the brightness of each display block and the target brightness, and then obtain the corresponding gray scale difference according to this brightness difference, then adjust the gray scale gain coefficient to change the gray scale of the corresponding sub-pixel until it can be displayed according to the target brightness, and finally optimize the gray scale of each sub-pixel at the junction of adjacent display blocks.

[0091] Among them, obtaining the corresponding gray scale difference according to this brightness difference can be achieved through the brightness-gray scale conversion relationship, that is, Lx / L255 = (x / 255)^2.2. In this formula, x is used to represent the gray scale, Lx represents the brightness corresponding to the X gray scale, and L255 represents the brightness corresponding to the gray scale 255. 2.2 is the gamma coefficient, and it can also be set to other values according to needs.

[0092] By comparison, compared with the gray scale compensation process shown in Figure 8 the gray scale compensation process shown in Figure 9 is more concise, efficient and accurate. Therefore, for the gray scale compensation process shown in Figure 9 it usually only needs to be completed once, and it is not necessary to check whether the brightness uniformity after the optimization process meets the requirements.

[0093] In one embodiment, such as Figure 10 , Figure 11As shown, the display panel 100 further includes a pixel circuit 120 for display, and the pixel circuit 120 includes at least one of a driving transistor T1, a first light-emitting control transistor T5, a second light-emitting control transistor T6, a writing transistor T2, a compensation transistor T3, a first initialization transistor T4, a second initialization transistor T7, a storage capacitor C1, and a light-emitting device OLED.

[0094] One of the source / drain of the first light-emitting control transistor T5 is connected to one end of the storage capacitor C1 and accesses the positive power supply signal VDD. The other of the source / drain of the first light-emitting control transistor T5 is connected to one of the source / drain of the driving transistor T1 and one of the source / drain of the writing transistor T2. The other of the source / drain of the driving transistor T1 is connected to one of the source / drain of the second light-emitting control transistor T6 and one of the source / drain of the compensation transistor T3. The other of the source / drain of the second light-emitting control transistor T6 is connected to the anode of the light-emitting device OLED and one of the source / drain of the second initialization transistor T7. The cathode of the light-emitting device OLED accesses the negative power supply signal VSS. The gate of the second light-emitting control transistor T6 is connected to the gate of the first light-emitting control transistor T5 and accesses the light-emitting control signal EM. The other of the source / drain of the writing transistor T2 accesses the data signal Data. The gate of the writing transistor T2 is connected to the gate of the compensation transistor T3 and the gate of the second initialization transistor T7 and accesses the nth-level scan signal Scan(n). The other of the source / drain of the compensation transistor T3 is connected to the gate of the driving transistor T1, one of the source / drain of the first initialization transistor T4, and the other end of the storage capacitor C1. The other of the source / drain of the first initialization transistor T4 is connected to one of the source / drain of the second initialization transistor T7 and accesses the initialization signal VI. The gate of the first initialization transistor T4 accesses the (n - 1)th-level scan signal Scan(n - 1).

[0095] Among them, the compensation transistor T3 and the first initialization transistor T4 can be combined transistors, both of which are composed of two thin-film transistors with their gates connected in series. It should be noted that this can prevent or reduce the gate leakage current of the driving transistor T1.

[0096] It should be noted that in the active matrix organic light-emitting display panel 100, a circuit stack structure will be formed, and it is inevitable in design to form a parasitic capacitance C between the data line for transmitting the data signal Data and the gate of the driving transistor T1 (as Figure 11 shown by the circular dotted line box). As Figure 12As shown, when the potential of the data signal Data jumps from a high potential to a low potential (the corresponding display brightness changes from black to gray), crosstalk is likely to occur to the gate potential Q of the driving transistor T1. The jumping voltage acts on the gate of the driving transistor T1 according to the ratio of the parasitic capacitance C to the storage capacitance C1, pulling up the gate potential Q of the driving transistor T1 by ΔVQ, thus resulting in Figure 13 the vertical crosstalk (V - direction Crosstalk) with a darker middle display as shown.

[0097] Figure 15 For the data signal Data of the pixel rows corresponding to the black blocks at the center positions in Figure 11 , Figure 14 , the voltages of the writing transistor T2 and / or the compensation transistor T3 during operation have a smaller gate - source voltage difference Vgs, that is, the parasitic capacitance Cgs between the gate and the source of the writing transistor T2 and / or the compensation transistor T3 in the on - state is large, resulting in a large delay (Delay) for the scan signal accessed by the pixel rows corresponding to the black blocks, and a lower voltage of the data signal Data written to the gate of the driving transistor T1, thus resulting in Figure 15 the horizontal crosstalk (H - direction Crosstalk) with a brighter middle display as shown.

[0098] It should be noted that Figure 13 , Figure 15 both of the two crosstalk phenomena shown in Figure 10 can cause the brightness uniformity of the display panel 100 to decrease. In view of this, this embodiment provides a display panel 100, as shown in

[0099] , the display panel 100 includes a timing controller 110, and the timing controller 110 stores a grayscale compensation table, which is made according to the grayscale compensation method in at least one of the above - mentioned embodiments.

[0099] It can be understood that for the display panel 100 provided in this embodiment, by first dividing the display area AA of the display panel 100 into a first display partition and a second display partition, and then compensating the grayscale of each sub - pixel in the second display partition with the average brightness of at least one second display partition as the target brightness, the brightness difference between the first display partition and the second display partition is reduced. This can not only improve the brightness uniformity of the display area AA; moreover, since only the grayscale of the sub - pixels in the second display partition is compensated, the required grayscale compensation data can be reduced.

[0100] In the above - mentioned embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] The above has introduced in detail the display panel and the grayscale compensation method provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gray-scale compensation method for a display panel, characterized in that Including: Configuring the display area of the display panel as at least one first display partition and at least one second display partition; Determining the average brightness of at least one of the second display partitions as the target brightness; Compensating the gray levels of the sub-pixels in at least one of the second display partitions until the target brightness; Wherein, configuring the display area as one first display partition and eight second display partitions, the area of the first display partition being the same as the area of at least one of the second display partitions; constructing the first display partition and the eight second display partitions in an array distribution; Determining the average brightness of at least one of the first second display partition from left to right and the third second display partition in the second row as the target brightness.

2. The gray level compensation method according to claim 1, wherein: Determining the resolution of the display panel; Based on the resolution, dividing each of the second display partitions into at least one display block, the size of the resolution being proportional to the number of display blocks in the same second display partition.

3. The gray level compensation method according to claim 2, wherein: Determining the gray level gain coefficients corresponding to the sub-pixels of various colors in each display block; Individually adjusting the gray level gain coefficients corresponding to the sub-pixels of various colors until the target brightness.

4. The grayscale compensation method according to claim 3, wherein The process of individually adjusting the gray level gain coefficients corresponding to the sub-pixels of various colors until the target brightness is as follows: Rx_Block_output = Rx_input * Rx_Gain Gx_Block_output = Gx_input * Gx_Gain Bx_Block_output = Bx_input * Bx_Gain Wherein, Rx_input, Gx_input, and Bx_input are respectively used to represent the initial gray level of the red sub-pixel, the initial gray level of the green sub-pixel, and the initial gray level of the blue sub-pixel in the display block at the x position; Rx_Gain, Gx_Gain, and Bx_Gain are respectively used to represent the gray level gain coefficient of the red sub-pixel, the gray level gain coefficient of the green sub-pixel, and the gray level gain coefficient of the blue sub-pixel in the display block at the x position; Rx_Block_output, Gx_Block_output, and Bx_Block_output are respectively used to represent the target gray level of the red sub-pixel, the target gray level of the green sub-pixel, and the target gray level of the blue sub-pixel in the display block at the x position, and the target gray level corresponds to the target brightness.

5. The gray level compensation method according to claim 4, wherein: Determining the area where the 2N rows and / or columns of sub-pixels starting from the junction in two adjacent display blocks are located as the junction area; Interpolating the gray levels corresponding to the target brightness of the sub-pixels located in the junction area.

6. The grayscale compensation method according to claim 5, wherein The process of interpolating the gray levels corresponding to the target brightness of the sub-pixels located in the junction area is as follows: Rm_Block_output1 = (Rx_Block_output - Rx+1_Block_output) / 2N * m + Rx_Block_output Gm_Block_output1 = (Gx_Block_output - Gx+1_Block_output) / 2N * m + Gx_Block_output Bm_Block_output1 = (Bx_Block_output - Bx+1_Block_output) / 2N * m + Bx_Block_output Wherein, N is the number of rows or columns of sub-pixels starting from the junction and located in the junction area in the corresponding display block, and m is the row sorting or column sorting of the sub-pixels starting from the junction; Rm_Block_output1, Gm_Block_output1, and Bm_Block_output1 are used to represent the gray levels of the red sub-pixels, green sub-pixels, and blue sub-pixels after interpolation processing of the sub-pixels in the m-th row / column respectively; Rx+1_Block_output, Gx+1_Block_output, and Bx+1_Block_output are used to represent the target gray levels of the red sub-pixels, green sub-pixels, and blue sub-pixels in the display block at the x+1 position respectively; and the display block where the sub-pixels in the m-th row / column are located is adjacent to the display block at the x position and the display block at the x+1 position.

7. The gray level compensation method according to claim 6, wherein determine the corresponding sub-pixels in the junction area that are repeatedly processed by the interpolation method; average the gray levels of the corresponding sub-pixels that are repeatedly processed by the interpolation method.

8. The grayscale compensation method according to claim 7, wherein The process of averaging the gray levels of the corresponding sub-pixels that are repeatedly processed by the interpolation method is as follows: Rm_Block_output = (Rm_Block_output1 + Rm+1_Block_output1) / 2 Gm_Block_output = (Gm_Block_output1 + Gm+1_Block_output1) / 2 Bm_Block_output = (Bm_Block_output1 + Bm+1_Block_output1) / 2 Among them, Rm_Block_output, Gm_Block_output, and Bm_Block_output are used to represent the averaged gray levels of the red sub-pixels, the averaged gray levels of the green sub-pixels, and the averaged gray levels of the blue sub-pixels that have been repeatedly processed by the interpolation method in the m-th row / column, respectively; Rm+1_Block_output1, Gm+1_Block_output1, and Bm+1_Block_output1 are used to represent the gray levels of the red sub-pixels after interpolation processing of the sub-pixels in the (m + 1)-th row / column, the gray levels of the green sub-pixels after interpolation processing of the sub-pixels in the (m + 1)-th row / column, and the gray levels of the blue sub-pixels after interpolation processing of the sub-pixels in the (m + 1)-th row / column, respectively.

9. The grayscale compensation method according to any one of claims 1 to 6, characterized in that, Before the step of compensating the gray levels of the sub-pixels in the at least one second display partition until the target brightness, the gray level compensation method further includes: judging whether the to-be-displayed frame image is a specified type of frame image, where the specified type of frame image is a frame image with a brightness uniformity less than or equal to a preset ratio and a normal visual effect; if so, performing the step of compensating the gray levels of the sub-pixels in the at least one second display partition until the target brightness; if not, directly displaying the to-be-displayed frame image.

10. A display panel, characterized in that, The display panel includes a timing controller, and the timing controller stores a gray level compensation table, and the gray level compensation table is made according to the gray level compensation method according to any one of claims 1 to 7.

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