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

Abstract

The gray scale compensation method, display device and compensation system of the display panel of the present application comprise: making the display panel display a first gray scale picture with a first gray scale value, a second gray scale picture with a second gray scale value and a third gray scale picture with a specific gray scale value, the gray scale value of each gray scale picture decreases in the order of the first gray scale value, the specific gray scale value and the second gray scale value; obtaining a compensation table according to the specific gray scale value of the third gray scale picture and corresponding third shooting gray scale data; obtaining a first conversion coefficient table for bright compensation according to the third gray scale picture and the first gray scale picture, and obtaining a second conversion coefficient table for dark compensation according to the third gray scale picture and the second gray scale picture; multiplying the compensation gray scale value with a positive value in the compensation gray scale data of the compensation table by the corresponding coefficient value of the first conversion coefficient table, and multiplying the compensation gray scale value with a negative value in the compensation gray scale data of the compensation table by the corresponding coefficient value of the second conversion coefficient table, to obtain a converted compensation table.

Description

TECHNICAL FIELD

[0001] The present application relates to a gray scale compensation method of a display panel, a display device and a compensation system, in particular to a conversion coefficient table obtaining method in the defect compensation technology of the brightness unevenness of a display panel such as LCD, the memory of the display device stores a compensated table after conversion obtained by the gray scale compensation method of the present application, and the compensation system applies the gray scale compensation method of the present application to perform brightness compensation on the display panel. BACKGROUND

[0002] For the display panel which has been manufactured, due to the structural qualitative characteristics, the brightness unevenness (hereinafter, also referred to as Mura) caused by various factors in the process of the display panel can be compensated by the external compensation method of imaging matching to compensate the pixels with brightness unevenness (hereinafter, referred to as Demura, brightness unevenness compensation), and then improve the problem of Mura.

[0003] The Demura technology of the LCD panel generally adopts a shooting system to shoot the display picture of the LCD to be compensated, and calculates the compensation gray scale data, so as to compensate the part with brightness unevenness. The basic principle of the Demura technology is to adjust the gray scale data of the uneven part of the LCD, and compensate it to the same brightness as the surrounding blocks. In the process from the compensation gray scale of the input LCD panel to the gray scale of the image shot by the camera, it is required to make the gray scale signal (voltage) of the input LCD panel drive the rotation of the liquid crystal molecules, and convert it into the penetration brightness of the LCD, and then make the light transmitted by the LCD be captured by the photodiode array of the camera, and convert it into the corresponding gray scale signal of the image shot by the camera.

[0004] In the existing Demura technology, such as Figure 3As shown, specifically divided into the following two steps: first, in the device building step S30, including: pre-adjusting the shooting system step S300, which is assumed to be ideal display a single sheet of sheet tuning LCD panel 302, control the LCD output corresponding to the compensation picture (for example, the specified pure gray scale picture), and adjust the shooting system parameters 301, so that the shooting image gray scale and the display picture gray scale consistent. Then, in the flow operation step S31, in turn, including: shooting step S310, control the compensation LCD panel 312 output compensation pure gray scale picture, using the shooting system 311 for shooting, get the shooting image 321; compensation target image acquisition step S320, via a specific calculation method 322, the calculation of the shooting image 321, get the compensation target image 323; compensation table acquisition step S330, using the subtraction calculation method 331, by the gray scale value difference between the compensation target image 323 and the shooting image 321, get the compensation table 332; compensation table conversion step S340, using the multiplication calculation method 341, the compensation table 332 and the conversion coefficient table 342 are multiplied to obtain the converted compensation table 343, because the pre-adjusting the shooting system step S300 has adjusted the shooting gray scale to be consistent with the LCD output gray scale, so the conversion coefficient in the conversion coefficient table is 1; and compensation table burning step S350, the converted compensation table 343 is burned into the memory of the LCD via the burning operation 351. SUMMARY

[0005] Technical problems to be solved by the present application

[0006] In the above-mentioned existing compensation method, as the final compensation effect of the compensation target image, theoretically, people expect the compensated image, which can be expressed as: the gray scale data of the compensation target image = the gray scale data of the display picture before compensation + the gray scale data compensated by the compensation table, but in fact, the LCD panel gray scale and the LCD luminance are not linearly related, but satisfy the relationship of L = Gray 2.2 The camera shooting brightness has corresponding camera gray scale, which is also not linearly related, but related to the sensitivity curve of the photodiode and other factors, so the camera shooting picture gray scale and the LCD panel compensation gray scale are not linearly related, and the compensation table obtained by the shooting system shooting image and the processed compensation target image needs to be converted by the above-mentioned compensation table conversion step S340 before it can be used for LCD compensation luminance unevenness.

[0007] However, the prior art still has the following problems: the fixed parameters of pre-adjustment are not suitable for all panels due to the brightness difference between different panels and the adjustment panel. Moreover, the compensation gray scale and the shooting gray scale are not in a linear relationship, and the panel brightness non-uniformity degree value shot by the shooting system cannot be directly used for panel compensation. In the case of inevitable deviation in the process of the LCD panel, the Gamma (gray scale-brightness curve) at different positions is different, which means that the conversion coefficients are different, which means that the conversion relationship of each area in the shot panel is different, and the uniform matching coefficient will lead to poor matching effect.

[0008] Solution to the problem

[0009] To solve the above problems, the gray scale compensation method provided by the present application is a gray scale compensation method for compensating the display panel brightness non-uniformity, which comprises the following steps: the display panel displays a first gray scale picture with a first gray scale value, a second gray scale picture with a second gray scale value, and a third gray scale picture with a specific gray scale value to be compensated, and the gray scale value of each gray scale picture decreases in the order of the first gray scale value, the specific gray scale value, and the second gray scale value; a compensation table is obtained according to the specific gray scale value of the third gray scale picture and the corresponding third shooting gray scale data; a first conversion coefficient table for light compensation is obtained according to the third gray scale picture and the first gray scale picture, and a second conversion coefficient table for dark compensation is obtained according to the third gray scale picture and the second gray scale picture; the compensation gray scale value with a positive value in the compensation gray scale data of the compensation table is multiplied by the corresponding coefficient value of the first conversion coefficient table, and the compensation gray scale value with a negative value in the compensation gray scale data of the compensation table is multiplied by the corresponding coefficient value of the second conversion coefficient table, to obtain a converted compensation table; and the converted compensation table is burned into the memory of the display panel.

[0010] The present application also relates to a display device, which comprises a display panel and a memory, wherein the memory stores the converted compensation table obtained by the gray scale compensation method of claim 1, and the display panel displays based on the gray scale data in the converted compensation table.

[0011] The present application also relates to a compensation system, comprising: a display panel comprising a memory; a panel control circuit which controls the voltage value of the display panel to make the display panel display a first gray scale picture with a first gray scale value, a second gray scale picture with a second gray scale value, and a third gray scale picture of a to-be-compensated gray scale picture with a specific gray scale value, the gray scale value of each gray scale picture decreasing in the order of the first gray scale value, the specific gray scale value, and the second gray scale value; a shooting system which shoots the display panel displaying the to-be-compensated gray scale picture, the first gray scale picture, and the second gray scale picture respectively under the condition that the shooting parameters are set to be the same; and a control device configured to: process the images shot by the shooting system into shooting gray scale data containing the gray scale value of each to-be-compensated unit via data processing; obtain a compensation table according to the specific gray scale value of the to-be-compensated gray scale picture and the corresponding shooting gray scale data; calculate the compensation gray scale data of the compensation table based on the following: obtaining a first conversion coefficient table for bright compensation according to the third gray scale picture and the first gray scale picture, and obtaining a second conversion coefficient table for dark compensation according to the third gray scale picture and the second gray scale picture; multiplying the compensation gray scale value of the compensation gray scale data of the compensation table which is positive with the corresponding coefficient value of the first conversion coefficient table, and multiplying the compensation gray scale value of the compensation gray scale data of the compensation table which is negative with the corresponding coefficient value of the second conversion coefficient table, to obtain a converted compensation table; and burning the converted compensation table into the memory of the display panel.

[0012] Inventive Effects

[0013] According to the above configuration of the present application, a gray scale compensation method of a display panel, a display device, and a compensation system are provided, since the fixed parameter mode of pre-adjusting the panel setting is abandoned, the accuracy of compensation when fitting the shooting gray scale to the compensation gray scale is improved, and in the case that the LCD process variation leads to different LCD in-plane Gamma, since the compensation coefficient is calculated independently, even if the in-plane Gamma is different, accurate compensation effect can be achieved, and the problem of poor matching effect caused by panel brightness difference can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a schematic diagram showing a compensation system 100.

[0015] Figure 2A FIG. 2 is a schematic diagram showing a gray scale compensation method of the present application.

[0016] Figure 2B FIG. 3 is a flow chart of the gray scale compensation method according to the present application.

[0017] Figure 3 FIG. 4 is a schematic diagram showing a gray scale compensation method of the prior art. DETAILED DESCRIPTION

[0018] The following describes the embodiments of the present disclosure in detail with reference to the accompanying drawings. Identical or corresponding parts to those in the drawings are denoted by the same reference numerals, and their descriptions will not be repeated. Furthermore, in the drawings referenced below, the configuration may be simplified or schematically illustrated, or some components may be omitted to facilitate understanding. Furthermore, the dimensional ratios between the components shown in the drawings do not necessarily represent actual dimensional ratios.

[0019] [1.1 Configuration of Compensation System 100]

[0020] Reference Figure 1 , a compensation system 100 to which the grayscale compensation method of the present invention is applied is described. Figure 1 As shown, the compensation system 100 includes a display panel 1 , a shooting system 2 , a control device 3 , and a panel control circuit 4 .

[0021] The display panel 1 is usually a semi-finished product of a display device without a backlight panel installed. In this embodiment, the display panel 1 is described as an LCD panel, but it can also be applied to other types of display panels.

[0022] The display panel 1 is provided with a memory 5, which can be implemented by an SD memory card, a hard disk, a mask ROM, an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), or the like. Various data can be stored in the memory 5, which can be written (burned) by the panel control circuit 4 or by the control device 3. The panel control circuit 4 controls the display of the display panel 1 based on the control of the control device 3 and the data read from the memory 5.

[0023] In addition, the memory 5 may be provided in other parts of the display device independently of the display panel 1 .

[0024] The shooting system 2, for example, has shooting elements such as high-precision and high-resolution CCD or CMOS image sensors and shooting optical systems such as zoom lenses and focusing lenses. The shooting system 2 is controlled by the control device 3, for example, to shoot the image displayed in the display area of ​​the display panel 1 that is the compensation object.

[0025] The control device 3 is capable of controlling the operation of various components within the compensation system 100, including the display panel 1, the camera system 2, and the panel control circuit 4. For example, the control device 3 controls the LCD panel 1, via the panel control circuit 4, to illuminate at a predetermined grayscale value (voltage). Furthermore, after capture by the camera system 2, the control device 3 processes the image captured by the camera system 2 to generate grayscale data containing the grayscale values ​​of each unit to be compensated. The processed grayscale data for compensation is then transmitted to the memory 5 of the display panel 1. The data processing performed by the control device 3 includes a specific calculation method 322, a subtraction calculation method 331, a conversion coefficient calculation method 41, and multiplication calculation methods 51 and 52.

[0026] [1.2 Grayscale compensation method]

[0027] Reference Figure 2A and Figure 2B , an imaging matching system and method according to a first embodiment of the present invention are described. Figure 2A is a schematic block diagram illustrating a grayscale compensation method of the present invention, Figure 2B is a flow chart of a grayscale compensation method according to the present invention.

[0028] First, a low grayscale image 11, a grayscale image to be compensated having a specified grayscale value 12, and a high grayscale image 13 displayed on an LCD panel 1 are captured using a capture system 2 with identical capture parameters to obtain a captured image 11' corresponding to the low grayscale image, a captured image 12' corresponding to the grayscale image to be compensated, and a captured image 13' corresponding to the high grayscale image (step S1). The input grayscale value corresponding to the low grayscale image is lower than the input grayscale value corresponding to the grayscale image to be compensated, and the input grayscale value corresponding to the high grayscale image is higher than the input grayscale value corresponding to the grayscale image to be compensated.

[0029] In addition, in the present embodiment, the to-be-compensated gray scale picture 12, the high gray scale picture 13 and the low gray scale picture 11 are all selected as pure gray scale pictures with a single gray scale value for the entire picture, and the gray scale value can be selected from any one of 0 to 255. Alternatively, the to-be-compensated gray scale picture can be displayed with multiple different gray scale values, and the different gray scale values are preferably selected from different gray scale value ranges in a segmented manner. For example, in the case of segmenting the gray scale value range into four parts, the to-be-compensated gray scale picture 12 is displayed with a gray scale value selected from any one of 0 to 63, 64 to 127, 128 to 191 and 192 to 255, and the gray scale values of the high gray scale picture 13 and the low gray scale picture 11 are appropriately set for each gray scale value selected by the to-be-compensated gray scale picture 12. However, the present application is not limited thereto, and the to-be-compensated gray scale picture 12 can also be a picture displayed with different gray scales in different regions, etc. In the case of displaying different gray scales in different regions, the gray scale values of the high gray scale picture 13 and the low gray scale picture 11 are appropriately set for the corresponding gray scale values of each region of the to-be-compensated gray scale picture 12.

[0030] In addition, in the present embodiment, the gray scale values of the high gray scale picture 13 and the low gray scale picture 11 can be different from the gray scale values of the to-be-compensated gray scale picture 12, and the difference in gray scale values can be appropriately set according to the compensation requirement. For example, the difference between the gray scale value of the high gray scale picture 13 and the gray scale value of the to-be-compensated gray scale picture 12 is preferably greater than 0 and not more than 15, and more preferably greater than 5 and not more than 10, and in addition, the difference between the gray scale value of the to-be-compensated gray scale picture 12 and the gray scale value of the low gray scale picture 11 is preferably greater than 0 and not more than 15, and more preferably greater than 5 and not more than 10. However, it should be noted that a too small difference in gray scale values can result in insufficient compensation of the gray scale values, and a too large difference in gray scale values can result in excessive compensation of the gray scale values. In the present embodiment, as an example, the gray scale value of the to-be-compensated gray scale picture is 32, the gray scale value of the high gray scale picture is 42, and the gray scale value of the low gray scale picture is 22, but the present application is not limited thereto.

[0031] Next, the gray scale data of the compensation target picture 21 is calculated by a specific calculation method 322 according to the gray scale data of the to-be-compensated gray scale picture corresponding to the captured image 12' (step S2). The specific calculation method 322 can use an existing calculation method as long as the gray scale data of the compensation target picture 21 can be obtained. It should be noted that the gray scale data described in the present specification is the gray scale value of each to-be-compensated unit of the display panel, and each to-be-compensated unit can be divided according to pixels, can be divided according to equal areas, or can be divided according to user requirements, and is not particularly limited.

[0032] Next, the gray scale values of the compensation target image 21 and the gray scale values of the photographed image 12' corresponding to the gray scale picture to be compensated are calculated by the subtraction method 331, and the compensation table 31 is obtained (step S3). The compensation table 31 contains the gray scale data of the compensation gray scale values of each unit to be compensated.

[0033] Next, the first conversion coefficient table 42 is calculated based on the high gray scale picture 13 and the gray scale picture to be compensated 12 and the photographed images corresponding to both, and the second conversion coefficient table 43 is calculated based on the low gray scale picture 11 and the gray scale picture to be compensated 12 and the photographed images corresponding to both (step S4). Specifically, the first conversion coefficient table 42 is calculated by the conversion coefficient calculation method 41 by dividing the gray scale value difference between the gray scale values of the high gray scale picture 13 and the gray scale picture to be compensated 12 by the gray scale value difference of the photographed images corresponding to both, i.e., the gray scale value difference between the photographed image 13' corresponding to the high gray scale picture and the photographed image 12' corresponding to the gray scale picture to be compensated. The second conversion coefficient table 43 is calculated by the conversion coefficient calculation method 41 by dividing the gray scale value difference between the gray scale values of the low gray scale picture 11 and the gray scale picture to be compensated 12 by the gray scale value difference of the photographed images corresponding to both, i.e., the gray scale value difference between the photographed image 11' corresponding to the low gray scale picture and the photographed image 12' corresponding to the gray scale picture to be compensated.

[0034] Next, the compensation gray scale values of the compensation table 31 that are positive are multiplied by the corresponding coefficient values of the first conversion coefficient table 42, and the compensation gray scale values of the compensation table 31 that are negative are multiplied by the corresponding coefficient values of the second conversion coefficient table 43, and thus the converted compensation table 53 is obtained (step S5). Therefore, the converted compensation table 53 contains the gray scale data of the compensation gray scale values of each unit to be compensated that are more realistic to be displayed.

[0035] The converted compensation table 53 is burned into the memory 5, such as an LCD-ROM, of the LCD panel to be compensated via the burning operation 351 (step S6). Thus, the memory 5 stores the converted compensation table 53 obtained by the above gray scale compensation method, and thus the display panel 1 can perform display based on the gray scale data in the converted compensation table 53.

[0036] [1.3 Mathematical model of the gray scale compensation method]

[0037] If the display gray scale data of the gray scale picture to be compensated 12 of the display panel 1 containing the gray scale values of each compensation unit is set as a matrix P T the photographed gray scale data of the corresponding photographed image 12' is set as a matrix C T the display gray scale data of the high gray scale picture 13 is set as a matrix P H, and the shooting gray scale data of the shooting image 13' corresponding to the high gray scale picture is set as a matrix C H Thus, according to the display gray scale data and the corresponding shooting gray scale data of the gray scale picture 12 to be compensated and the high gray scale picture 13, the following first conversion coefficient table 42 for bright compensation is obtained, which is represented by a matrix k1:

[0038]

[0039] Further, the display gray scale data of the low gray scale picture 11 containing each compensation unit is set as a matrix P L , and the shooting gray scale data of the shooting image 11' corresponding to the low gray scale picture is set as a matrix C L Thus, according to the display gray scale data and the corresponding shooting gray scale data of the gray scale picture 12 to be compensated and the low gray scale picture 11, the following second conversion coefficient table 43 for dark compensation is obtained, which is represented by a matrix k2:

[0040]

[0041] Therefore, if the compensation gray scale data of the compensation table 31 is represented by a matrix T, and the converted compensation table 53 is represented by a matrix R, then:

[0042]

[0043] Further, the display gray scale data is determined by the gray scale data input to the display panel 1. For example, if the display panel 1 is caused to display an image having a specific gray scale value, then the gray scale value of the display gray scale data is the above-mentioned specific gray scale value. Further, in the present embodiment, a plurality of shooting images can be shot when shooting the shooting image 12' corresponding to the gray scale picture to be compensated, the shooting image 11' corresponding to the low gray scale picture, and the shooting image 13' corresponding to the low gray scale picture, and the shooting gray scale data corresponding to the above-mentioned gray scale picture to be compensated, the above-mentioned first gray scale picture, and the above-mentioned second gray scale picture, respectively, can be obtained by averaging.

[0044] [1.4 Software-based implementation]

[0045] The control device 3 of the gray scale compensation method according to the present application can be implemented by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or can be implemented by software. In the case of the former, the control device 3 can be a special-purpose electronic circuit designed to implement a prescribed function, or a reconfigurable electronic circuit or the like hardware circuit.

[0046] The control device 3 is, for example, a computer that executes commands of a program as software that realizes each function. The computer has, for example, one or more processors, and has a computer-readable recording medium in which the program is stored. Furthermore, in the computer, the object of the present application is realized by reading the program from the recording medium by the processor and executing the program. As the processor, a CPU (Central Processing Unit) can be used, for example. As the recording medium, a "non-transitory tangible medium" can be used, such as a magnetic tape, a disk, a card, a semiconductor memory, a programmable logic circuit, and the like, in addition to a ROM (Read Only Memory) and the like. In addition, a RAM (Random Access Memory) or the like for expanding the program can also be provided. In addition, the program can be provided to the computer via any transmission medium (communication network, broadcast wave, and the like) that can transmit the program. Furthermore, in one embodiment of the present application, the program can also be realized in the form of a signal embedded in a carrier wave that is embodied by electronic transmission.

[0047] The present application replaces the use of the same conversion coefficient for all panels to be compensated in the prior art, and instead uses three images with different gray scales taken under the same shooting parameters to convert the compensation table, thereby omitting the pre-adjustment shooting system step of the device setup step, further improving the poor matching effect caused by the difference in panel brightness, and improving the accuracy of compensation when fitting the shooting gray scale to the compensation gray scale, even if the in-panel Gamma is different, accurate compensation effect can be achieved.

[0048] The present application is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present application. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

[0049] Explanation of Reference Signs

[0050] 1: Display panel (LCD panel)

[0051] 2: Shooting system

[0052] 3: Control device

[0053] 4: Panel control circuit

[0054] 5: Memory

[0055] 11: Low gray scale image (second gray scale image)

[0056] 12: to-be-compensated gray scale picture (third gray scale picture)

[0057] 13: high gray scale picture (first gray scale picture)

[0058] 11': photographed image corresponding to low gray scale picture (second photographed image)

[0059] 12': photographed image corresponding to to-be-compensated gray scale picture (third gray scale picture)

[0060] 13': photographed image corresponding to high gray scale picture (first gray scale picture)

[0061] 21: compensation target image

[0062] 31: compensation table

[0063] 42: first conversion coefficient table

[0064] 43: second conversion coefficient table

[0065] 53: converted compensation table

Claims

1. A grayscale compensation method for compensating for uneven brightness of a display panel, characterized in that: The steps include: causing the display panel to display a first grayscale image having a first grayscale value, a second grayscale image having a second grayscale value, and a grayscale image to be compensated having a specific grayscale value, i.e., a third grayscale image, wherein the grayscale values ​​of the grayscale images are reduced according to the first grayscale value, the specific grayscale value, and the second grayscale value; acquiring a compensation table according to the specific grayscale value of the third grayscale image and the corresponding third shooting grayscale data; acquiring a first conversion coefficient table for bright compensation based on the third grayscale picture and the first grayscale picture, and acquiring a second conversion coefficient table for dark compensation based on the third grayscale picture and the second grayscale picture; multiplying the positive compensation grayscale values ​​in the compensation grayscale data of the compensation table by the corresponding coefficient values ​​in the first conversion coefficient table, and multiplying the negative compensation grayscale values ​​in the compensation grayscale data of the compensation table by the corresponding coefficient values ​​in the second conversion coefficient table to obtain a converted compensation table; and The converted compensation table is burned into the memory of the display panel.

2. The grayscale compensation method according to claim 1, wherein: If the display grayscale data of the third grayscale frame including the grayscale values ​​of each unit to be compensated is set as matrix P T , the corresponding third shot grayscale data is set as matrix C T , set the display grayscale data of the first grayscale image to be the matrix P H , the corresponding first shot grayscale data is set as matrix C H , the first conversion coefficient table is represented by matrix k1, and the step of obtaining the first conversion coefficient table is calculated according to formula 1:

3. The grayscale compensation method according to claim 1, wherein: If the display grayscale data of the third grayscale frame including the grayscale values ​​of each unit to be compensated is set as matrix P T , the corresponding third shot grayscale data is set as matrix C T , set the display grayscale data of the second grayscale image to be the matrix P L , the corresponding second shooting grayscale data is set as matrix C L , the second conversion coefficient table is represented by matrix k2, and the step of obtaining the second conversion coefficient table is calculated according to formula 2:

4. The grayscale compensation method according to any one of claims 1 to 3, wherein: A difference between the first grayscale value and the specific grayscale value is greater than 0 and does not exceed 15.

5. The grayscale compensation method according to any one of claims 1 to 3, characterized in that: A difference between the specific grayscale value and the second grayscale value is greater than 0 and does not exceed 15.

6. The grayscale compensation method according to claim 1, wherein: Also includes: The imaging step uses a imaging system set with the same imaging parameters to capture images of the display panel when it displays the third grayscale image, the first grayscale image, and the second grayscale image, respectively, and processes the captured images into captured grayscale data containing the grayscale values ​​of each unit to be compensated.

7. The grayscale compensation method according to claim 1, wherein: In the photographing step, a plurality of images are taken of the third grayscale frame, the first grayscale frame, and the second grayscale frame, and the photographed grayscale data corresponding to the third grayscale frame, the first grayscale frame, and the second grayscale frame are respectively obtained by calculating the average value.

8. The grayscale compensation method according to claim 1, wherein: The first grayscale picture, the second grayscale picture, and the third grayscale picture are all pure grayscale pictures.

9. A display device, characterized in that: include: Display panel and memory, The memory stores the converted compensation table obtained by the grayscale compensation method according to claim 1. The display panel performs display based on the grayscale data in the converted compensation table.

10. A compensation system, characterized in that: include: a display panel including a memory; a panel control circuit configured to control a voltage value of the display panel so that the display panel displays a first grayscale image having a first grayscale value, a second grayscale image having a second grayscale value, and a third grayscale image having a specific grayscale value that is a grayscale image to be compensated, wherein the grayscale values ​​of the grayscale images decrease according to the first grayscale value, the specific grayscale value, and the second grayscale value; a shooting system, which, when set to the same shooting parameters, shoots the display panel displaying the grayscale image to be compensated, the first grayscale image, and the second grayscale image; and A control device configured to: Processing the image captured by the camera system into captured grayscale data including the grayscale value of each unit to be compensated; Obtaining a compensation table according to the specific grayscale value of the grayscale picture to be compensated and the corresponding captured grayscale data; The following calculation is performed based on the compensated grayscale data of the compensation table: a first conversion coefficient table for bright compensation is obtained based on the third grayscale picture and the first grayscale picture, and a second conversion coefficient table for dark compensation is obtained based on the third grayscale picture and the second grayscale picture; a positive compensated grayscale value in the compensated grayscale data of the compensation table is multiplied by a corresponding coefficient value in the first conversion coefficient table, and a negative compensated grayscale value in the compensated grayscale data of the compensation table is multiplied by a corresponding coefficient value in the second conversion coefficient table, to obtain a converted compensation table; and, The converted compensation table is burned into the memory of the display panel.

Images