Compensation methods and brightness compensation devices for display panels

Abstract

This invention provides a method for compensating a display panel and a device for compensating the brightness of a display panel. The compensation method includes: taking pictures of the display panel displaying a preset grayscale using multiple imaging components to obtain the actual brightness of the main pixels of the display panel; taking pictures of the display panel displaying the preset grayscale using multiple imaging components to obtain the actual brightness of the secondary pixels of the display panel; obtaining a frontal compensation value for the area to be compensated using the target brightness of the main pixels and the actual brightness of the main pixels; obtaining a target brightness of the secondary pixels using the target brightness of the main pixels and a brightness relationship lookup table, wherein the brightness relationship lookup table includes the brightness of the main pixels and the brightness of the secondary pixels, and the main pixel brightness and the corresponding secondary pixel brightness are used to make the brightness of the display panel the same under both frontal and side viewing angles; obtaining a side viewing compensation value for the area to be compensated using the target brightness of the secondary pixels and the actual brightness of the secondary pixels; and compensating the pixels of the area to be compensated according to the frontal compensation value and the side viewing compensation value.

Description

Technical Field

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

[0002] As market demand drives up panel sizes, the resulting images suffer from distortion and brightness inconsistencies due to camera viewing angles, leading to miscompensation. To mitigate the impact of camera viewing angles, multi-camera Demura (optical compensation) technology has been introduced. This involves using multiple cameras to capture images, generating compensation values ​​corresponding to the screen locations captured by each camera, and then stitching together portions from each location to obtain the front-view compensation value for the display panel. While this eliminates image distortion caused by camera viewing angles, it only addresses front-view mura (brightness unevenness) and does not repair side-view mura. Summary of the Invention

[0003] The embodiments of the present invention provide a compensation method and a brightness compensation device for a display panel, which compensates for the mura viewed from the front while also compensating for the mura viewed from the side, so as to solve the technical problem in the related art that can only eliminate the mura viewed from the front of the screen but cannot repair the mura viewed from the side.

[0004] To solve the above problems, the technical solution provided by the present invention is as follows:

[0005] In a first aspect, the present invention provides a compensation method for a display panel, the display panel including a plurality of areas to be compensated, the display panel further including a main pixel and a slave pixel located within the areas to be compensated, the compensation method comprising:

[0006] Multiple imaging components are used to take pictures of the display panel displaying a preset grayscale to obtain the actual brightness of the main pixels of the display panel, wherein each imaging component is directly facing the corresponding area to be compensated;

[0007] Multiple of the aforementioned photographing components are used to take pictures of the display panel displaying the preset grayscale, so as to obtain the actual pixel brightness of the display panel;

[0008] The frontal compensation value of the area to be compensated is obtained by using the target brightness of the main pixel and the actual brightness of the main pixel.

[0009] The target brightness of the secondary pixel is obtained by means of the target brightness of the primary pixel and the brightness relationship lookup table, wherein the brightness relationship lookup table includes the brightness of the primary pixel and the brightness of the secondary pixel, and the primary pixel brightness and the corresponding secondary pixel brightness are used to make the brightness of the display panel the same under the front viewing angle and the side viewing angle.

[0010] The side-view compensation value of the area to be compensated is obtained by the target brightness of the pixel and the actual brightness of the pixel.

[0011] The main pixels of the region to be compensated are compensated according to the frontal compensation value;

[0012] The pixels in the region to be compensated are compensated according to the side-view compensation value.

[0013] In one embodiment, using multiple imaging components to capture images of the display panel displaying the preset grayscale to obtain the actual pixel brightness of the display panel includes:

[0014] The actual pixel brightness of the area to be compensated is obtained by taking a pixel brightness image of the area to be compensated from the other imaging components (excluding the imaging component directly opposite the area to be compensated) among the multiple imaging components.

[0015] In one embodiment, the step of obtaining the actual pixel brightness of the region to be compensated from the pixel brightness image of the region to be compensated captured by the other imaging components (excluding the imaging component directly opposite the region to be compensated) includes:

[0016] Multiple pixel brightness values ​​of the area to be compensated are obtained by capturing pixel brightness images of the area to be compensated using other imaging components besides the imaging component directly opposite the area to be compensated.

[0017] The pixel brightness with the largest difference from the target pixel brightness among the multiple pixel brightness values ​​is selected as the actual pixel brightness of the region to be compensated.

[0018] In one embodiment, compensating the pixels of the region to be compensated using the side-view compensation value includes:

[0019] Establish a view-grayscale correspondence table for the area to be compensated under the target brightness, showing the relationship between the viewing angle and the grayscale.

[0020] Establish a table showing the correspondence between the degree of distortion of the region to be compensated and the degree of distortion of the viewpoint;

[0021] The degree of distortion of the pixel brightness image is obtained from the pixel brightness image.

[0022] The viewing angle of the imaging component is obtained by the degree of distortion and the correlation table between the degree of distortion and the viewing angle;

[0023] The grayscale compensation value of the pixel in the area to be compensated is obtained by the side-view compensation value, the viewing angle of the camera component, and the viewing angle-grayscale correspondence table.

[0024] The pixels in the area to be compensated are compensated according to the grayscale compensation values ​​of the pixels.

[0025] In one embodiment, obtaining the side-view compensation value of the region to be compensated from the target pixel brightness and the actual pixel brightness includes:

[0026] Based on the target brightness of the pixel and the actual brightness of the pixel, the side-view compensation value of the area to be compensated is calculated using a first brightness compensation formula, which is as follows:

[0027] W1 = N1 * center1 + (1 - N1) * other1

[0028] Wherein, W1 is the side-view compensation value, N1 is the weighting coefficient of the target brightness of the pixel, center1 is the target brightness of the pixel, and other1 is the actual brightness of the pixel.

[0029] In one embodiment, the display panel includes multiple sub-display areas, each sub-display area including at least one area to be compensated, and the step of using multiple imaging components to take pictures of the display panel displaying a preset grayscale to obtain the actual brightness of the main pixels of the display panel includes:

[0030] Multiple photographing components are used to take pictures of the display panel displaying a preset grayscale, wherein each of the sub-display areas is provided with one of the photographing components;

[0031] The portion corresponding to the area where the camera component is located is extracted from the main pixel brightness image captured by each of the aforementioned camera components. The cropped portions from multiple main pixel brightness images are then stitched together to obtain the frontal brightness image of the main pixel.

[0032] The actual brightness of the main pixel in the region to be compensated is obtained by examining the frontal brightness image of the main pixel.

[0033] In one embodiment, obtaining the frontal compensation value of the area to be compensated by using the target brightness of the main pixel and the actual brightness of the main pixel includes:

[0034] Based on the target brightness of the main pixel and the actual brightness of the main pixel, the frontal view compensation value of the area to be compensated is calculated using a second brightness compensation formula, which is as follows:

[0035] W2 = N2 * center2 + (1 - N2) * other2

[0036] Wherein, W2 is the frontal compensation value, N2 is the weighting coefficient of the target brightness of the main pixel, center2 is the target brightness of the main pixel, and other2 is the actual brightness of the main pixel.

[0037] In one embodiment, compensating the main pixel of the region to be compensated using the frontal compensation value includes:

[0038] Establish a brightness-grayscale correspondence table between the main pixel brightness and grayscale of the area to be compensated;

[0039] The grayscale compensation value of the main pixel in the area to be compensated is obtained by using the frontal compensation value and the brightness-grayscale correspondence table.

[0040] The main pixels in the area to be compensated are compensated according to the grayscale compensation value of the main pixels.

[0041] In one embodiment, the actual brightness of the main pixel in the region to be compensated is the average brightness of the plurality of main pixels in the region to be compensated, and the actual brightness of the slave pixel in the region to be compensated is the average brightness of the plurality of slave pixels in the region to be compensated.

[0042] Secondly, the present invention also provides a brightness compensation device for a display panel, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps in any of the above-described compensation methods for the display panel.

[0043] The beneficial effects of this invention are as follows: the actual brightness of the main pixel and the actual brightness of the slave pixel are obtained by multiple imaging components, and the target brightness of the main pixel and the target brightness of the slave pixel are determined according to the brightness relationship lookup table so that the brightness of the display panel is the same under the frontal and side viewing angles. Finally, the frontal compensation value of the area to be compensated is calculated based on the target brightness of the main pixel and the actual brightness of the main pixel, and the side viewing compensation value of the area to be compensated is calculated based on the target brightness of the slave pixel and the actual brightness of the slave pixel. The main pixel and the slave pixel of the area to be compensated are compensated according to the frontal compensation value and the side viewing compensation value, respectively, so that the side viewing compensation is completed in the frontal compensation process of the display panel. Attached Figure Description

[0044] 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.

[0045] Appendix Figure 1This is a schematic flowchart of the panel compensation method of the present invention in one embodiment;

[0046] Appendix Figure 2 This is a schematic diagram showing the position of the camera component of the present invention in one embodiment;

[0047] Appendix Figure 3 This is a schematic diagram showing the position of the camera component of the present invention in one embodiment;

[0048] Appendix Figure 4 This is a flowchart illustrating step S100 of the present invention in one embodiment;

[0049] Appendix Figure 5 This is a flowchart illustrating step S200 of the present invention in one embodiment;

[0050] Appendix Figure 6 This is a flowchart illustrating step S600 of the present invention in one embodiment;

[0051] Appendix Figure 7 This is a flowchart illustrating step S700 of the present invention in one embodiment;

[0052] Appendix Figure 8 This is a schematic diagram illustrating the relationship between the actual brightness and grayscale of the area to be compensated in this invention.

[0053] Appendix Figure 9 This is a schematic diagram illustrating the relationship between the brightness of the main pixel and the brightness of the slave pixel in order to make the display panel have the same brightness when viewed from the front and from the side.

[0054] Appendix Figure 10 This is a schematic diagram illustrating the relationship between the target brightness, viewing angle, and grayscale of the area to be compensated in this invention.

[0055] Appendix Figure 11 This is a schematic diagram illustrating the relationship between the degree of distortion of the area to be compensated and the viewing angle in this invention. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0057] In one embodiment, the present invention provides a compensation method for a display panel, which compensates for both the frontal view mura and the side view mura of the display panel, thereby solving the technical problem in related technologies that can only eliminate the frontal view mura of the screen but cannot repair the side view mura.

[0058] The display panel includes multiple sub-pixels, each including master pixels and slave pixels. These sub-pixels emit light under the drive of a driving circuit, enabling the display panel to display a specific image. The display panel is divided into m regions to be compensated, each region consisting of n*n pixels. In some embodiments, the value of n only needs to ensure that the region to be compensated is square, i.e., the lines connecting the sub-pixels within the region to be compensated form a square. In some embodiments, the region to be compensated can also be circular or other shapes convenient for application in the methods described below.

[0059] The compensation method includes:

[0060] S100. Multiple photographic components are used to take pictures of the display panel displaying a preset grayscale to obtain the actual brightness of the main pixels of the display panel, wherein each photographic component is directly facing the corresponding area to be compensated.

[0061] S200: Using multiple of the aforementioned photographing components, the display panel displaying the preset grayscale is photographed to obtain the actual brightness of the pixels of the display panel.

[0062] S300: Obtain the frontal compensation value of the area to be compensated by using the target brightness of the main pixel and the actual brightness of the main pixel.

[0063] S400. Obtain the target brightness of the secondary pixel through the target brightness of the primary pixel and the brightness relationship lookup table, wherein the brightness relationship lookup table includes the brightness of the primary pixel and the brightness of the secondary pixel, and the primary pixel brightness and the corresponding secondary pixel brightness are used to make the brightness of the display panel the same under the front viewing angle and the side viewing angle.

[0064] S500, the side view compensation value of the area to be compensated is obtained by the target brightness of the pixel and the actual brightness of the pixel.

[0065] S600. Compensate the main pixels of the area to be compensated according to the frontal compensation value.

[0066] S700, Compensate the pixels in the area to be compensated according to the side-view compensation value.

[0067] In this embodiment, the actual brightness of the main pixel and the actual brightness of the slave pixel are obtained through multiple imaging components. The target brightness of the main pixel and the target brightness of the slave pixel are determined according to the brightness relationship lookup table so that the brightness of the display panel is the same under the frontal and side viewing angles. Finally, the frontal compensation value of the area to be compensated is calculated based on the target brightness of the main pixel and the actual brightness of the main pixel. The side viewing compensation value of the area to be compensated is calculated based on the target brightness of the slave pixel and the actual brightness of the slave pixel. The main pixel and the slave pixel of the area to be compensated are compensated according to the frontal compensation value and the side viewing compensation value, respectively. Thus, the side viewing compensation is completed in the frontal compensation process of the display panel.

[0068] It should be noted that the steps S100, S200, S300, S400, S500, S600, and S700 used to describe the panel compensation method of this application are only for the purpose of facilitating understanding of the method process and are not intended to limit the specific order of steps in the brightness compensation method of this application. The brightness compensation method of this application may also have other order of steps that can achieve the purpose of this application. For example, S100 and S200 may be completed in the same drawing step in some embodiments, and the order of S600 and S700 may also be interchanged. Therefore, this application has multiple order of steps that can achieve the purpose of this application, and no limitation is made here.

[0069] In some embodiments, to obtain more accurate actual brightness of the main pixels, multiple imaging components are distributed across the display area of ​​the display panel, such that the viewing angle of each imaging component relative to the corresponding area to be compensated is smaller than a preset value (i.e., directly facing the area to be compensated). Figure 2 , Figure 3 As shown, in the display panel, multiple areas to be compensated constitute a display sub-area. The display panel includes four sub-display areas (A, B, C, D), and each display sub-area corresponds to one of the photographing components (A', B', C', D'). Figure 4 As shown, S100 includes:

[0070] S101. Multiple photographic components are used to take pictures of the display panel displaying a preset grayscale, wherein each photographic component is directly facing the area to be compensated. It is understood that each photographic component can capture the entire display area of ​​the display panel, or it can capture only the corresponding area. Simultaneously, when acquiring the main pixel brightness, only the main pixels in the area to be compensated are controlled to emit light, while the secondary pixels do not emit light; the same principle applies to obtaining the secondary pixel brightness described below.

[0071] S102. Extract the portion of the main pixel brightness image captured by each of the aforementioned camera components that corresponds to the area where the camera component is located, and stitch together the cropped portions from multiple main pixel brightness images to obtain the frontal brightness image of the main pixel.

[0072] Since each of the aforementioned display sub-regions is equipped with a photographing component, the portion of the main pixel brightness image captured by each photographing component that corresponds to the area where the photographing component is located can be stitched together to obtain the frontal brightness image of the entire display area of ​​the display panel.

[0073] As described above, in the main pixel brightness image captured by camera component A', only the image of sub-display area A is retained; in the main pixel brightness image captured by camera component B', only the image of sub-display area B is retained; in the main pixel brightness image captured by camera component C', only the image of sub-display area C is retained; and in the main pixel brightness image captured by camera component D', only the image of sub-display area D is retained. The images retained by each camera component are then stitched together to obtain the final image, which is the front-view brightness image of the main pixel.

[0074] S103. Obtain the actual brightness of the main pixel in the area to be compensated by the frontal brightness image of the main pixel.

[0075] The brightness image of the main pixel obtained in step S102 is identified by a brightness analyzer or other device with brightness recognition function to obtain the actual brightness of the main pixel in each area to be compensated. In some embodiments, the imaging component may also include a component with brightness recognition function. How to identify the brightness of pixels based on the brightness image is a conventional technique used by those skilled in the art and will not be described in detail here.

[0076] In one embodiment, to obtain the actual brightness of the pixel under different viewing angles, such as Figure 5 As shown, step S200 can be specifically described as follows:

[0077] The actual pixel brightness of the area to be compensated is obtained by taking a pixel brightness image of the area to be compensated from the other imaging components (excluding the imaging component directly opposite the area to be compensated) among the multiple imaging components.

[0078] Referring to the previous embodiment, when calculating the actual brightness of the pixels in the area to be compensated in sub-display area A, only the pixel brightness images captured by the corresponding imaging components B', C', and D' in sub-display areas B, C, and D are referenced. It is understood that in other embodiments, the pixel brightness image captured by imaging component A' may also be referenced.

[0079] Therefore, in one embodiment, S200, the step of obtaining the actual pixel brightness of the region to be compensated from the pixel brightness image of the region to be compensated captured by the other imaging components (excluding the imaging component directly opposite the region to be compensated) among the plurality of imaging components, includes:

[0080] S201. Obtain multiple pixel brightness values ​​of the area to be compensated by capturing pixel brightness images of the area to be compensated using the other imaging components (excluding the imaging component directly opposite the area to be compensated) among the multiple imaging components.

[0081] Since each camera component has a different viewing angle relative to the area to be compensated, the brightness of the pixels obtained by each camera component is also different. Therefore, corresponding to the above embodiment, each pixel of each area to be compensated in the sub-display area A has three pixel brightness values.

[0082] S202. Select the one with the largest difference between the brightness of the multiple pixels and the target brightness of the pixels as the actual brightness of the pixels in the area to be compensated.

[0083] If the difference between the brightness of a pixel in the area to be compensated and the target brightness of the pixel in the brightness image captured by camera component B' is 2 nits, the difference is 5 nits in the brightness image captured by camera component C', and the difference is 3 nits in the brightness image captured by camera component D', then the brightness of the pixel captured by camera component C' is taken as the actual brightness of that pixel. It is understandable that since the display panel determines the corresponding display level using the worst mura, the above steps can improve the display level of the display panel.

[0084] In some embodiments, five camera components may also be provided, such as Figure 2 As shown, unlike the embodiments described above, a camera component O' is also provided in the central area O of the display panel. This application does not limit the number of camera components; the actual brightness of the main pixels and the actual brightness of the slave pixels can follow the ideas expressed in the embodiments described above.

[0085] In one embodiment, step S300, obtaining the frontal compensation value of the area to be compensated by using the target brightness of the main pixel and the actual brightness of the main pixel, includes:

[0086] Based on the target brightness of the main pixel and the actual brightness of the main pixel, the frontal view compensation value of the area to be compensated is calculated using a second brightness compensation formula, which is as follows:

[0087] W2 = N2 * center2 + (1 - N2) * other2

[0088] Wherein, W2 is the frontal compensation value, N2 is the weighting coefficient of the target brightness of the main pixel, center2 is the target brightness of the main pixel, and other2 is the actual brightness of the main pixel.

[0089] In some embodiments, the target brightness of the main pixel is the brightness of the area to be compensated located in the middle region of the display panel. It is understood that the frontal compensation value W2 obtained according to the second brightness compensation formula described above is a brightness value, representing the brightness value that the main pixel in the corresponding compensation area should achieve. Meanwhile, those skilled in the art can also set a target brightness for the main pixel as needed.

[0090] In some embodiments, the target brightness of the main pixel, the target brightness of the secondary pixel, the actual brightness of the main pixel, and the actual brightness of the secondary pixel all refer to the average brightness of the corresponding pixel in the compensation area. For example, the actual brightness of the main pixel in a compensation area obtained by the imaging component is the average value of the brightness of all main pixels in the compensation area.

[0091] In some embodiments, the weighting coefficient N2 for the target brightness of the main pixel can be any value between 0.1 and 1, such as 0.1, 0.2, 0.5, 0.9, etc. Those skilled in the art can select an appropriate weighting coefficient based on the display panel.

[0092] The above embodiments describe the calculation of the frontal view compensation value based on the target brightness of the main pixel. The target brightness of the main pixel can be selected from the brightness of any area to be compensated in the display panel, or a target brightness can be preset. To ensure that the brightness of the display panel is the same when viewed from the front and from the side, the brightness of the main pixel and the brightness of the secondary pixel in the corresponding compensation area must satisfy a corresponding relationship. This relationship can be experimentally measured by a technician or obtained from an existing database; this application does not limit this. In this embodiment, the correspondence between the main pixel brightness and the secondary pixel brightness can be as follows: Figure 9 The brightness relationship table shown indicates that the blended brightness represents the actual brightness of the display panel measured when viewed from the front and from the side, with the corresponding combination of main pixel brightness and slave pixel brightness.

[0093] Therefore, after determining the target brightness of the main pixel in the above embodiments, the target brightness of the secondary pixel that meets the above requirements can be found according to the brightness relationship table.

[0094] Therefore, in step S400, the target brightness of the secondary pixel is obtained through the target brightness of the primary pixel and the brightness relationship lookup table. The brightness relationship lookup table includes the brightness of the primary pixel and the brightness of the secondary pixel. The primary pixel brightness and the corresponding secondary pixel brightness are used to make the brightness of the display panel the same under the frontal viewing angle and the side viewing angle.

[0095] In one embodiment, step S500, obtaining the side-view compensation value of the area to be compensated from the target brightness of the pixel and the actual brightness of the pixel, includes:

[0096] Based on the target brightness of the pixel and the actual brightness of the pixel, the side-view compensation value of the area to be compensated is calculated using a first brightness compensation formula, which is as follows:

[0097] W1 = N1 * center1 + (1 - N1) * other1

[0098] Wherein, W1 is the side-view compensation value, N1 is the weighting coefficient of the target brightness of the pixel, center1 is the target brightness of the pixel, and other1 is the actual brightness of the pixel.

[0099] The calculation of the side-view compensation value and the requirements for the corresponding parameters can be referred to the front-view compensation value in the above embodiment, and will not be repeated here.

[0100] In one embodiment, such as Figure 6 As shown, step S600, compensating the main pixel of the area to be compensated using the frontal compensation value, includes:

[0101] S601. Establish a table showing the correspondence between the brightness of the main pixel and the grayscale of the area to be compensated.

[0102] After a period of use, some sub-pixels on a display panel may experience a mismatch between their preset grayscale and preset brightness due to various reasons. For example, aging of the corresponding driving transistors may result in insufficient driving current at the corresponding grayscale voltage. The consequence is that when the display panel displays an image at the preset grayscale, the brightness of some sub-pixels may not reach the preset brightness, resulting in a brightness difference on the display panel. Therefore, when performing frontal view compensation, it is necessary to establish a brightness-grayscale correspondence table between the brightness of the main pixels in the area to be compensated and the grayscale values. Figure 8 As shown, A1, A2, A3, A4, etc., represent the actual brightness of the main pixel in the area to be compensated at the corresponding gray levels B1, B2, B3, B4.

[0103] S602. Obtain the grayscale compensation value of the main pixel of the area to be compensated by means of the frontal compensation value and the brightness-grayscale correspondence table.

[0104] The frontal compensation value obtained in the above embodiments can be used to obtain the gray level when the corresponding area to be compensated wants to achieve the desired brightness, and the gray level voltage corresponding to the gray level can be used as the gray level compensation value of the main pixel to compensate the main pixel of the area to be compensated.

[0105] S603. Compensate the main pixel of the area to be compensated according to the grayscale compensation value of the main pixel.

[0106] Compensating the main pixels of the region to be compensated with grayscale compensation values ​​may include applying the grayscale voltage obtained in the above embodiments to the main pixels within the region to be compensated.

[0107] In one embodiment, such as Figure 7 As shown, step S700, compensating the pixels of the area to be compensated using the side-view compensation value, includes:

[0108] S701. Establish a view-grayscale correspondence table for the area to be compensated under the target brightness, showing the relationship between the viewing angle and the grayscale.

[0109] Unlike the compensation of the main pixels mentioned above, compensation of secondary pixels is more complex. Secondary pixels not only suffer from aging and other factors that can cause the actual brightness captured by the camera module to differ from the brightness expected at the preset grayscale, but the viewing angle of the camera module relative to the area to be compensated also distorts the brightness obtained by the camera module. Therefore, when establishing the correspondence between the true brightness of secondary pixels and grayscale, the influence of the viewing angle should also be considered. Figure 10 As shown, the required grayscale varies depending on the viewing angle at different target brightness levels.

[0110] The relationship between pixel brightness and image viewing angle has been explained above. Therefore, when calculating the compensation value for a pixel, the image viewing angle of the camera component relative to the area to be compensated should be obtained first.

[0111] S702. Establish a table relating the degree of distortion of the area to be compensated to the degree of distortion of the viewing angle. Those skilled in the art will know that the degree of distortion of the shape formed by the sub-pixels of the target area in the brightness image differs depending on the viewing angle between the imaging component and the target area. Therefore, a table relating the degree of distortion to the viewing angle can be established, such as... Figure 11 As shown.

[0112] S703. Obtain the degree of distortion of the pixel brightness image based on the pixel brightness image.

[0113] S704. Obtain the viewing angle of the imaging component through the distortion degree and the distortion degree-viewing angle correspondence table.

[0114] When obtaining a brightness image through the camera component, the degree of distortion of the corresponding compensation area relative to the corresponding camera component is obtained based on the brightness image. Then, based on the established distortion degree-viewpoint correspondence table, the viewing angle of the camera component relative to the corresponding area to be compensated can be determined.

[0115] S705. Obtain the grayscale compensation value of the secondary pixel of the area to be compensated using the side-view compensation value, the viewing angle of the imaging component, and the viewing angle-grayscale correspondence table. After obtaining the viewing angle of the imaging component, based on the aforementioned side-view compensation value (i.e., the brightness that the secondary pixel of the area to be compensated should achieve) and the viewing angle-grayscale correspondence table, the grayscale corresponding to the brightness (side-view compensation value) that the secondary pixel of the area to be compensated should achieve under that viewing angle can be determined.

[0116] S706. Compensate the pixels in the area to be compensated according to the grayscale compensation value of the pixels.

[0117] Based on the actual grayscale required for a pixel to reach the side-view compensation value, the grayscale voltage required for the pixel can be determined. Applying this grayscale to all pixels in the area to be compensated will complete the side-view compensation.

[0118] In one embodiment, the actual brightness of the main pixel in the region to be compensated is the average brightness of the plurality of main pixels in the region to be compensated, and the actual brightness of the slave pixel in the region to be compensated is the average brightness of the plurality of slave pixels in the region to be compensated.

[0119] In one embodiment, the compensation method further includes storing the obtained frontal and side-view compensation values, such as storing them in the storage module of the display panel.

[0120] The present invention also provides a brightness compensation device for a display panel, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps in the compensation method for the display panel described in the above embodiments.

[0121] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A compensation method of a display panel, characterized by, The display panel includes multiple areas to be compensated, and the display panel also includes master pixels and slave pixels located within the areas to be compensated. The compensation method includes: Multiple imaging components are used to take pictures of the display panel displaying a preset grayscale to obtain the actual brightness of the main pixels of the display panel, wherein each imaging component is directly facing the corresponding area to be compensated; Multiple of the aforementioned photographing components are used to take pictures of the display panel displaying the preset grayscale, so as to obtain the actual pixel brightness of the display panel; The frontal compensation value of the area to be compensated is obtained by using the target brightness of the main pixel and the actual brightness of the main pixel. The target brightness of the secondary pixel is obtained by means of the target brightness of the primary pixel and the brightness relationship lookup table, wherein the brightness relationship lookup table includes the brightness of the primary pixel and the brightness of the secondary pixel, and the primary pixel brightness and the corresponding secondary pixel brightness are used to make the brightness of the display panel the same under the front viewing angle and the side viewing angle. The side-view compensation value of the area to be compensated is obtained by the target brightness of the pixel and the actual brightness of the pixel. The main pixels of the region to be compensated are compensated according to the frontal compensation value; The pixels in the region to be compensated are compensated according to the side-view compensation value.

2. The compensation method of a display panel according to claim 1, wherein, The display panel displaying the preset grayscale is photographed using multiple of the aforementioned photographing components to obtain the actual pixel brightness of the display panel, including: The actual pixel brightness of the area to be compensated is obtained by taking a pixel brightness image of the area to be compensated from the other imaging components (excluding the imaging component directly opposite the area to be compensated) among the multiple imaging components.

3. The compensation method of a display panel according to claim 2, wherein, The step of obtaining the actual pixel brightness of the region to be compensated from the pixel brightness images of the region to be compensated captured by the imaging components other than the imaging component directly opposite the region to be compensated, including: Multiple pixel brightness values ​​of the area to be compensated are obtained by capturing pixel brightness images of the area to be compensated using other imaging components besides the imaging component directly opposite the area to be compensated. The pixel brightness with the largest difference from the target pixel brightness among the multiple pixel brightness values ​​is selected as the actual pixel brightness of the region to be compensated.

4. The compensation method of a display panel according to claim 2, wherein, The step of compensating the pixels in the region to be compensated using the side-view compensation value includes: Establish a view-grayscale correspondence table for the area to be compensated under the target brightness, showing the relationship between the viewing angle and the grayscale. Establish a table showing the correspondence between the degree of distortion of the region to be compensated and the degree of distortion of the viewpoint; The degree of distortion of the pixel brightness image is obtained from the pixel brightness image. The viewing angle of the imaging component is obtained by the degree of distortion and the correlation table between the degree of distortion and the viewing angle; The grayscale compensation value of the pixel in the area to be compensated is obtained by the side-view compensation value, the viewing angle of the camera component, and the viewing angle-grayscale correspondence table. The pixels in the area to be compensated are compensated according to the grayscale compensation values ​​of the pixels.

5. The compensation method of a display panel according to claim 1, wherein, The step of obtaining the side-view compensation value of the region to be compensated from the target brightness of the pixel and the actual brightness of the pixel includes: Based on the target brightness of the pixel and the actual brightness of the pixel, the side-view compensation value of the area to be compensated is calculated using a first brightness compensation formula, which is as follows: W1 = N1 * center1 + (1 - N1) * other1 Wherein, W1 is the side-view compensation value, N1 is the weighting coefficient of the target brightness of the pixel, center1 is the target brightness of the pixel, and other1 is the actual brightness of the pixel.

6. The compensation method of a display panel according to claim 1, wherein, The method involves using multiple imaging components to capture images of the display panel displaying a preset grayscale to obtain the actual brightness of the main pixels of the display panel. Each imaging component is positioned directly opposite the area to be compensated, including: Multiple camera components are used to take pictures of the display panel displaying a preset grayscale, wherein each camera component is directly facing the area to be compensated; The portion corresponding to the area where the camera component is located is extracted from the main pixel brightness image captured by each of the aforementioned camera components. The cropped portions from multiple main pixel brightness images are then stitched together to obtain the frontal brightness image of the main pixel. The actual brightness of the main pixel in the region to be compensated is obtained by examining the frontal brightness image of the main pixel.

7. The compensation method of a display panel according to claim 1, wherein, The frontal compensation value of the area to be compensated is obtained by using the target brightness of the main pixel and the actual brightness of the main pixel, including: Based on the target brightness of the main pixel and the actual brightness of the main pixel, the frontal view compensation value of the area to be compensated is calculated using a second brightness compensation formula, which is as follows: W2 = N2 * center2 + (1 - N2) * other2 Wherein, W2 is the frontal compensation value, N2 is the weighting coefficient of the target brightness of the main pixel, center2 is the target brightness of the main pixel, and other2 is the actual brightness of the main pixel.

8. The compensation method for a display panel according to claim 1, characterized in that, Compensating the main pixels of the region to be compensated using the frontal compensation value includes: Establish a brightness-grayscale correspondence table between the main pixel brightness and grayscale of the area to be compensated; The grayscale compensation value of the main pixel in the area to be compensated is obtained by using the frontal compensation value and the brightness-grayscale correspondence table. The main pixels in the area to be compensated are compensated according to the grayscale compensation value of the main pixels.

9. The compensation method for a display panel according to any one of claims 1 to 8, characterized in that, The actual brightness of the main pixel in the area to be compensated is the average brightness of the multiple main pixels in the area to be compensated, and the actual brightness of the slave pixel in the area to be compensated is the average brightness of the multiple slave pixels in the area to be compensated.

10. A brightness compensation device for a display panel, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the steps in the compensation method for the display panel of any one of claims 1 to 9.

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