Compensation method and compensation device for display device

Abstract

The application discloses a display device compensation method and a compensation device. The display device compensation method comprises the following steps: obtaining the display brightness value of the pixels in the display area at 255 gray scales, obtaining the backlight brightness value of the backlight area corresponding to the display area according to the display brightness value; determining a backlight area as a target backlight area, and the backlight brightness value of the target backlight area is a target backlight value; obtaining the backlight compensation value of the other backlight areas according to the target backlight value, and correcting the backlight brightness value of the other backlight areas according to the backlight compensation value. The brightness uniformity of the display panel can be improved, and the display effect is improved.

Description

Technical Field

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

[0002] To improve display quality, current LCD panels employ gamma adjustment technology to ensure that the screen's brightness distribution conforms to human eye standards. A low gamma value results in reduced detail in dark areas of the displayed image, while a high gamma value reduces detail in bright areas. The panel's gamma characteristic curve refers to the relationship between a panel's grayscale and its display brightness; this curve exhibits an exponential distribution.

[0003] For large-size panels, factors such as manufacturing process differences can cause uneven brightness in the display panel. In existing technologies, the gamma value curve is corrected by obtaining the relationship between the brightness and grayscale at the center point of the panel. The advantage of this is that only one set of data needs to be stored, which is low-cost and fast. However, for panels with poor brightness uniformity within the panel, a set of gamma compensation values ​​cannot guarantee that the gamma value distribution in each area of ​​the panel is within the specification. In this case, when the gamma curve at the center point is adjusted to the target value, the gamma curve in the area far from the center may deviate significantly. Therefore, sharing a set of gamma compensation values ​​for panels with poor brightness uniformity within the panel can lead to problems such as grayscale drop, thus failing to solve the problem of uneven brightness in the display panel. Summary of the Invention

[0004] This application provides a compensation method and compensation device for a display device, which can improve the brightness uniformity of the display panel.

[0005] On one hand, embodiments of this application provide a compensation method for a display device. The display device includes a display panel and a backlight module. The display panel is divided into multiple display zones, and the backlight module includes multiple backlight zones. The display zones and the backlight zones correspond one-to-one. The compensation method includes: obtaining the display brightness value of a pixel in the display zone at a grayscale of 255; obtaining the backlight brightness value of the backlight zone corresponding to the display zone based on the display brightness value; determining a backlight zone as a target backlight zone, and the backlight brightness value of the target backlight zone is a target backlight value; obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value; and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values.

[0006] Optionally, in some embodiments of this application, the step of determining a backlight zone as a target backlight zone, and the backlight brightness value of the target backlight zone as a target backlight value, specifically includes: obtaining the display parameters corresponding to each display zone at 255 gray levels; comparing the display parameters corresponding to each display zone with preset display parameters respectively; determining the display zone with the smallest difference between the display parameters and the preset parameters as the target display zone, the backlight zone corresponding to the target display zone as the target backlight zone, and the backlight brightness value of the target backlight zone as the target backlight value.

[0007] Optionally, in some embodiments of this application, the step of obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values, specifically includes: subtracting the backlight brightness values ​​corresponding to other backlight zones from the target backlight value to obtain backlight compensation values ​​corresponding to other backlight zones; and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values.

[0008] Optionally, in some embodiments of this application, the step of obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values, specifically includes: obtaining the target backlight value corresponding to the target backlight zone and the backlight brightness values ​​corresponding to other backlight zones at gray levels from 0 to 254; subtracting the backlight brightness values ​​corresponding to other backlight zones from the target backlight value at the corresponding gray level to obtain the backlight compensation values ​​corresponding to the other backlight zones at gray levels from 0 to 254; and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values.

[0009] Optionally, in some embodiments of this application, the step of obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values, specifically includes: obtaining the target backlight value corresponding to the target backlight zone and the backlight brightness values ​​corresponding to other backlight zones under multiple bound-point grayscales; subtracting the backlight brightness values ​​corresponding to other backlight zones from the target backlight value under the corresponding grayscale to obtain the backlight compensation values ​​corresponding to other backlight zones under multiple bound-point grayscales; using interpolation to obtain the backlight compensation values ​​corresponding to other backlight zones under other grayscales; and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values.

[0010] Optionally, in some embodiments of this application, before the step of obtaining the display brightness value of the pixels in the display partition at 255 grayscale and obtaining the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value, the method further includes: obtaining the display chromaticity value of the pixels in each display partition at 255 grayscale; determining one of the display partitions as a target display partition, wherein the display chromaticity value of the target display partition is a target chromaticity value; obtaining the chromaticity compensation value corresponding to the pixels in other display partitions based on the target chromaticity value, and performing chromaticity compensation on the pixels in the corresponding display partitions based on the chromaticity compensation value.

[0011] Optionally, in some embodiments of this application, the step of determining a display partition as a target display partition, and the display chromaticity value of the target display partition being a target chromaticity value, specifically includes: obtaining a preset chromaticity value of a pixel in each display partition at a grayscale of 255; comparing the display chromaticity value corresponding to each display partition with the preset chromaticity value respectively; determining the display partition with the smallest difference between the display chromaticity value and the preset chromaticity value as the target display partition, and the display chromaticity value of the target display partition being the target chromaticity value.

[0012] Optionally, in some embodiments of this application, the step of obtaining the display brightness value of the pixels in the display partition at 255 grayscale, and obtaining the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value, specifically includes: obtaining the display color temperature value of the pixels in each display partition at 255 grayscale, and the display brightness value and display chromaticity value corresponding to the display color temperature value; obtaining the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value; and calculating the tristimulus values ​​of the white screen of the display partition based on the display brightness value and the display chromaticity value.

[0013] Optionally, in some embodiments of this application, the step of determining a backlight zone as a target backlight zone, the backlight brightness value of the target backlight zone being a target backlight value; obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values, specifically includes: obtaining a preset color temperature value of a pixel in each display zone at 255 grayscale, and comparing the display color temperature value corresponding to each display zone with the preset color temperature value respectively; determining that the difference between the display color temperature value and the preset color temperature value is the smallest. The display partition is the target display partition, and the backlight partition corresponding to the target display partition is the target backlight partition. The backlight brightness value of the target backlight partition is the target backlight value. The tristimulus value of the white screen of the target display partition is the target tristimulus value. The chromaticity compensation value corresponding to other display partitions is obtained according to the target tristimulus value, and the tristimulus value of the white screen of the corresponding display partition is corrected according to the chromaticity compensation value. The backlight compensation value corresponding to other backlight partitions is obtained according to the target backlight value, and the backlight brightness value of other backlight partitions is corrected according to the backlight compensation value.

[0014] On the other hand, embodiments of this application also provide a compensation device for a display device. The display device includes a display panel and a backlight module. The display panel is divided into multiple display zones, and the backlight module includes multiple backlight zones. The display zones and the backlight zones correspond one-to-one. The compensation device includes an acquisition module and a compensation module. The acquisition module is used to acquire the display brightness value of a pixel in the display zone at a preset grayscale and to acquire the backlight brightness value of the backlight zone corresponding to the display zone based on the display brightness value. The compensation module is used to determine a target backlight zone, acquire backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correct the backlight brightness values ​​of other backlight zones based on the backlight compensation values.

[0015] This application provides a compensation method and apparatus for a display device. The compensation method includes: obtaining the display brightness value of a pixel in a display zone at a grayscale of 255; obtaining the backlight brightness value of a backlight zone corresponding to the display zone based on the display brightness value; determining a backlight zone as a target backlight zone, wherein the backlight brightness value of the target backlight zone is a target backlight value; obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value; and correcting the backlight brightness values ​​of the other backlight zones based on the backlight compensation values. This compensation method, by obtaining the target backlight value of the target backlight zone, obtaining the backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of the other backlight zones based on the backlight compensation values, can improve the brightness uniformity of the display panel, thereby improving the display effect. Attached Figure Description

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

[0017] Figure 1 This is a schematic flowchart of a first method for compensating a display device according to an embodiment of the present application.

[0018] Figure 2 for Figure 1 A schematic diagram of the sub-process of step S20 in the compensation method for the provided display device;

[0019] Figure 3 for Figure 1 One of the sub-process diagrams of step S30 in the compensation method for the provided display device;

[0020] Figure 4 for Figure 1 The second sub-process diagram of step S30 in the compensation method for the provided display device;

[0021] Figure 5 for Figure 1 The third sub-process diagram of step S30 in the compensation method for the provided display device;

[0022] Figure 6 This is a second flowchart illustrating the compensation method for the display device provided in the embodiments of this application;

[0023] Figure 7 for Figure 6 A schematic diagram of the sub-process of step S02 in the compensation method for the provided display device;

[0024] Figure 8 A third flowchart illustrating the compensation method for the display device provided in the embodiments of this application;

[0025] Figure 9 This is a schematic diagram of the structure of the compensation device for the display device provided in the embodiments of this application. Detailed Implementation

[0026] 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.

[0027] This application discloses a compensation method and compensation device for a display device, which can improve the brightness uniformity of a display panel. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms "first", "second", "third", etc., are used only as identifiers to distinguish different objects, and are not used to describe a specific order.

[0028] Please see Figure 1 , Figure 1 This is a schematic flowchart of a first method for compensating a display device provided in an embodiment of this application. For example... Figure 1 As shown in the figure, this application provides a compensation method for a display device. The display device includes a display panel and a backlight module. The display panel is divided into multiple display zones, and the backlight module includes multiple backlight zones. The display zones and backlight zones correspond one-to-one. The compensation method includes the following steps:

[0029] S10. Obtain the display brightness value of the pixels in the display zone at 255 grayscale, and obtain the backlight brightness value of the backlight zone corresponding to the display zone based on the display brightness value.

[0030] In this embodiment, since one display zone corresponds to one backlight zone, the backlight brightness value of the corresponding backlight zone can be calculated by obtaining the display brightness value of the pixels in each display zone at the highest grayscale. Specifically, the calculation method may include the average value method, that is, using the average display brightness value of all pixels in the display zone as the backlight brightness value of the corresponding backlight zone.

[0031] S20. Determine a backlight zone as the target backlight zone, and the backlight brightness value of the target backlight zone is the target backlight value.

[0032] In the embodiments of this application, please refer to Figure 2 , Figure 2 for Figure 1 A schematic diagram of the sub-process of step S20 in the compensation method for the provided display device. (See attached diagram.) Figure 2 As shown, step S20 specifically includes the following sub-steps:

[0033] S201. Obtain the display parameters corresponding to each display zone at 255 grayscale.

[0034] Specifically, the display parameters include the power consumption of the display device and the image quality of the display panel at that display brightness.

[0035] S202. Compare the display parameters corresponding to each display partition with the preset display parameters respectively.

[0036] Obtain the display brightness value at which the power consumption of the display device is within a preset range and the picture quality is better, and set the display partition corresponding to the display brightness value as the target display partition.

[0037] S203. Determine the display partition with the smallest difference between the display parameters and the preset parameters as the target display partition, the backlight partition corresponding to the target display partition as the target backlight partition, and the backlight brightness value of the target backlight partition as the target backlight value.

[0038] S30. Obtain the backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correct the backlight brightness values ​​of other backlight zones based on the backlight compensation values.

[0039] In the embodiments of this application, please refer to Figure 3 , Figure 3 for Figure 1 One of the sub-process diagrams of step S30 in the compensation method for the provided display device. For example... Figure 3 As shown, step S30 specifically includes the following sub-steps:

[0040] S301. Subtract the target backlight value from the backlight brightness value corresponding to the other backlight zones to obtain the backlight compensation value corresponding to the other backlight zones.

[0041] S302. Correct the backlight brightness values ​​of other backlight zones based on the backlight compensation value.

[0042] In this embodiment, the brightness compensation of other backlight zones is performed according to the target backlight value, which helps to improve the brightness uniformity of the display panel.

[0043] In this embodiment, after adjusting the display brightness values ​​of each display zone at the highest grayscale (255 grayscale), the display brightness values ​​of each display zone at grayscale levels 0 to 254 are further adjusted. Please refer to [link to relevant documentation]. Figure 4 , Figure 4 for Figure 1 The second sub-process diagram of step S30 in the compensation method for the provided display device. (See diagram for example.) Figure 4 As shown, step S30 specifically includes the following sub-steps:

[0044] S311. Obtain the target backlight value corresponding to the target backlight zone and the backlight brightness value corresponding to other backlight zones in grayscale levels from 0 to 254.

[0045] S312. Subtract the backlight brightness value corresponding to the other backlight zones from the target backlight value at the corresponding gray level to obtain the backlight compensation value corresponding to the other backlight zones at gray levels 0 to 254.

[0046] S313. Correct the backlight brightness values ​​of other backlight zones based on the backlight compensation value.

[0047] In this embodiment of the application, the target brightness value of the target backlight zone is obtained, and the difference between the target brightness value and the backlight brightness value corresponding to other backlight zones is calculated to obtain the backlight compensation value corresponding to each backlight zone. The backlight brightness value of other backlight zones is corrected according to the backlight compensation value to compensate the display brightness of the pixels in the display zone corresponding to the backlight zone.

[0048] As one specific embodiment of this application, please refer to Figure 5 , Figure 5 for Figure 1 The third sub-process diagram of step S30 in the compensation method for the provided display device. (See diagram below.) Figure 5 As shown, step S30 specifically includes the following sub-steps:

[0049] S321. Obtain the target backlight value corresponding to the target backlight zone and the backlight brightness value corresponding to other backlight zones under multiple binding point grayscale.

[0050] S322. Subtract the backlight brightness value corresponding to other backlight zones from the target backlight value at the corresponding gray level to obtain the backlight compensation value corresponding to other backlight zones at multiple bound point gray levels; use interpolation to obtain the backlight compensation value corresponding to other backlight zones at other gray levels.

[0051] In this embodiment, several gray levels are selected from low, medium, and high gray levels as gray levels for brightness data collection, and are denoted as binding points. For example, gray levels 25, 60, and 128 are selected as binding points (the number and values ​​of gray levels can be selected according to actual needs, and this application does not impose specific limitations here). The brightness difference between the target backlight zone and other backlight zones at the binding point gray levels is compared, and the backlight compensation value is calculated to compensate the backlight brightness of other backlight zones.

[0052] In this embodiment, the previous step is repeated to obtain the backlight compensation value of the backlight zone under the bound-point grayscale. Then, interpolation is used to calculate the backlight compensation value corresponding to each backlight zone under the full grayscale.

[0053] S323. Correct the backlight brightness values ​​of other backlight zones based on the backlight compensation value.

[0054] In this embodiment, the backlight compensation value is burned into the backlight control memory. The backlight brightness value of each backlight zone other than the target backlight zone is corrected to ensure that the gamma curve of each display zone is consistent, thereby ensuring that the overall gamma curve of the display device is optimal.

[0055] As one specific embodiment of this application, please refer to Figure 6 , Figure 6 This is a schematic diagram of a second process for a compensation method for a display device provided in an embodiment of this application. For example... Figure 6 and Figure 1 As shown, before step S10, the procedure further includes:

[0056] S01. Obtain the display chromaticity value of each pixel in the display partition at a grayscale of 255.

[0057] In this embodiment of the application, the tristimulus values ​​corresponding to the display chromaticity values ​​of pixels in each display partition at a grayscale of 255 are obtained.

[0058] S02. Determine a display partition as the target display partition, and set the display chromaticity value of the target display partition to the target chromaticity value.

[0059] In the embodiments of this application, please refer to Figure 7 , Figure 7 for Figure 6 A schematic diagram of the sub-process of step S02 in the compensation method for the provided display device. (See attached diagram.) Figure 7 As shown, step S02 specifically includes the following sub-steps:

[0060] S021. Obtain the preset chromaticity value of the pixels in each display partition at a grayscale of 255.

[0061] In this embodiment of the application, the tristimulus value corresponding to the preset chromaticity value of the pixel in each display partition at a grayscale of 255 is obtained.

[0062] S022. Compare the display chromaticity value corresponding to each display partition with the preset chromaticity value respectively.

[0063] S023. Determine the display partition with the smallest difference between the displayed chromaticity value and the preset chromaticity value as the target display partition, and the displayed chromaticity value of the target display partition is the target chromaticity value.

[0064] S03. Obtain the chromaticity compensation value corresponding to the pixels in other display partitions based on the target chromaticity value, and perform chromaticity compensation on the pixels in the corresponding display partitions based on the chromaticity compensation value.

[0065] In this embodiment, the difference between the tristimulus value corresponding to the preset chromaticity value and the tristimulus value corresponding to the display chromaticity value of the pixel in the display partition at 255 grayscale is calculated to obtain the chromaticity compensation value, and the chromaticity compensation is performed on the pixel in the corresponding display partition according to the chromaticity compensation value.

[0066] The other steps are the same as those in S10 to S30 above, so they will not be repeated here.

[0067] In the above embodiments, only the display brightness of the display panel is adjusted; or the display brightness of the display panel is adjusted after the display color of the display panel is adjusted. As a specific implementation of this application, the following embodiments use a combination of display brightness compensation and display color compensation to improve the uniformity of brightness and color of the display panel.

[0068] As one specific implementation of this application Figure 8 This is a schematic diagram of a third process for a compensation method for a display device provided in an embodiment of this application. For example... Figure 8 As shown, the compensation method includes the following steps:

[0069] S101. Obtain the display color temperature value of the pixels in the display partition at 255 grayscale, as well as the display brightness value and display chromaticity value corresponding to the display color temperature value.

[0070] In the embodiments of this application, the display chromaticity value of the display device at the display color temperature can be measured by a measuring instrument, and the tristimulus value can be calculated according to the formula. The calculation formula is an existing formula, so it will not be described in detail here.

[0071] S102. Obtain the backlight brightness value of the backlight zone corresponding to the display zone based on the display brightness value.

[0072] S103. Calculate the tristimulus values ​​of the white screen in the display zone based on the display brightness value and display chromaticity value.

[0073] S104. Obtain the preset color temperature value of the pixels in each display partition at 255 grayscale, and compare the display color temperature value corresponding to each display partition with the preset color temperature value respectively.

[0074] In this embodiment, the preset color temperature value can be the standard color temperature value of the pixel at 255 gray levels.

[0075] S105. Determine the display zone with the smallest difference between the displayed color temperature value and the preset color temperature value as the target display zone, the backlight zone corresponding to the target display zone as the target backlight zone, the backlight brightness value of the target backlight zone as the target backlight value, and the tristimulus value of the white screen of the target display zone as the target tristimulus value.

[0076] S106. Obtain the chromaticity compensation values ​​corresponding to other display zones based on the target tristimulus value, and correct the tristimulus values ​​of the white screen of the corresponding display zone based on the chromaticity compensation values; obtain the backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correct the backlight brightness values ​​of other backlight zones based on the backlight compensation values.

[0077] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of the compensation device for the display device provided in the embodiments of this application. For example... Figure 9 As shown in the figure, this application embodiment also provides a compensation device 100 for a display panel. The display device includes a display panel and a backlight module. The display panel is divided into multiple display zones, and the backlight module includes multiple backlight zones. The display zones and backlight zones correspond one-to-one. The compensation device 100 includes: an acquisition module 110 and a compensation module 120. The acquisition module 110 is used to acquire the display brightness value of the pixels in the display zone at a preset grayscale and to acquire the backlight brightness value of the backlight zone corresponding to the display zone based on the display brightness value. The compensation module 120 is used to determine the target backlight zone, acquire the backlight compensation value corresponding to other backlight zones based on the target backlight value, and correct the backlight brightness value of other backlight zones based on the backlight compensation value.

[0078] This application provides a compensation method and compensation device for a display device. The compensation method obtains the target backlight value of the target backlight area, obtains the backlight compensation value of other backlight areas based on the target backlight value, and corrects the backlight brightness value of other backlight areas based on the backlight compensation value, thereby improving the brightness uniformity of the display panel and improving the display effect.

[0079] The above provides a detailed description of a compensation method and compensation device for a display device according to the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A compensation method for a display device, characterized in that, The display device includes a display panel and a backlight module. The display panel is divided into multiple display zones, and the backlight module includes multiple backlight zones. The display zones and the backlight zones correspond one-to-one. The compensation method includes: Obtain the display brightness value of the pixels in the display partition at 255 gray levels, and obtain the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value; A backlight zone is identified as a target backlight zone, and the backlight brightness value of the target backlight zone is the target backlight value; Based on the target backlight value, obtain the backlight compensation value corresponding to the other backlight zones, and correct the backlight brightness value of the other backlight zones based on the backlight compensation value; The step of obtaining the display brightness value of a pixel in the display partition at a grayscale of 255, and obtaining the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value, specifically includes: Obtain the display color temperature value of each pixel in the display partition at 255 grayscale, and the display brightness value and display chromaticity value corresponding to the display color temperature value; The backlight brightness value of the backlight zone corresponding to the display zone is obtained based on the display brightness value; The tristimulus values ​​of the white screen in the display zone are calculated based on the display brightness value and the display chromaticity value.

2. The compensation method for the display device according to claim 1, characterized in that, The step of determining a backlight zone as a target backlight zone, wherein the backlight brightness value of the target backlight zone is a target backlight value, specifically includes: Obtain the display parameters of each display zone at a grayscale level of 255; The display parameters corresponding to each display partition are compared with preset display parameters respectively; The display partition with the smallest difference between the display parameters and the preset display parameters is determined as the target display partition, and the backlight partition corresponding to the target display partition is determined as the target backlight partition, and the backlight brightness value of the target backlight partition is the target backlight value.

3. The compensation method for the display device according to claim 1, characterized in that, The step of obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values, specifically includes: Subtract the target backlight value from the backlight brightness value corresponding to the other backlight zones to obtain the backlight compensation value corresponding to the other backlight zones. The backlight brightness values ​​of the other backlight zones are corrected based on the backlight compensation value.

4. The compensation method for the display device according to claim 1, characterized in that, The step of obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values, specifically includes: The target backlight value corresponding to the target backlight zone and the backlight brightness value corresponding to the other backlight zones are obtained respectively at gray levels 0 to 254. Subtract the backlight brightness value corresponding to the other backlight zones from the target backlight value at the corresponding gray level to obtain the backlight compensation value corresponding to the other backlight zones at gray levels 0 to 254. The backlight brightness values ​​of the other backlight zones are corrected based on the backlight compensation value.

5. The compensation method for the display device according to claim 1, characterized in that, The step of obtaining backlight compensation values ​​corresponding to other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of other backlight zones based on the backlight compensation values, specifically includes: The target backlight value corresponding to the target backlight partition and the backlight brightness value corresponding to the other backlight partitions are obtained respectively under multiple binding point grayscale. Subtract the backlight brightness value corresponding to the other backlight zones from the target backlight value at the corresponding gray level to obtain the backlight compensation value corresponding to the other backlight zones at multiple bound-point gray levels; use interpolation to obtain the backlight compensation value corresponding to the other backlight zones at other gray levels. The backlight brightness values ​​of the other backlight zones are corrected based on the backlight compensation value.

6. The compensation method for the display device according to claim 1, characterized in that, Before the step of obtaining the display brightness value of the pixels in the display partition at 255 grayscale, and obtaining the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value, the method further includes: Obtain the display chromaticity value of each pixel in the display partition at a grayscale level of 255; A display partition is identified as a target display partition, and the display chromaticity value of the target display partition is the target chromaticity value; Based on the target chromaticity value, obtain the chromaticity compensation value corresponding to the pixels in the other display partitions, and perform chromaticity compensation on the pixels in the corresponding display partitions based on the chromaticity compensation value.

7. The compensation method for the display device according to claim 6, characterized in that, The step of determining a display partition as a target display partition, wherein the display chromaticity value of the target display partition is a target chromaticity value, specifically includes: Obtain the preset chromaticity value of the pixel in each of the display partitions at a grayscale level of 255; The display chromaticity value corresponding to each display partition is compared with the preset chromaticity value; The display partition with the smallest difference between the displayed chromaticity value and the preset chromaticity value is determined as the target display partition, and the display chromaticity value of the target display partition is the target chromaticity value.

8. The compensation method for the display device according to claim 1, characterized in that, The backlight zone is determined as the target backlight zone, and the backlight brightness value of the target backlight zone is the target backlight value; The steps of obtaining backlight compensation values ​​for other backlight zones based on the target backlight value, and correcting the backlight brightness values ​​of the other backlight zones based on the backlight compensation values, specifically include: Obtain the preset color temperature value of the pixels in each display partition at 255 grayscale, and compare the display color temperature value corresponding to each display partition with the preset color temperature value respectively; The display zone with the smallest difference between the displayed color temperature value and the preset color temperature value is determined as the target display zone, the backlight zone corresponding to the target display zone is determined as the target backlight zone, the backlight brightness value of the target backlight zone is the target backlight value, and the tristimulus value of the white screen of the target display zone is the target tristimulus value. Based on the target tristimulus value, obtain the chromaticity compensation value corresponding to other display zones, and correct the tristimulus value of the white screen of the corresponding display zone according to the chromaticity compensation value; based on the target backlight value, obtain the backlight compensation value corresponding to other backlight zones, and correct the backlight brightness value of other backlight zones according to the backlight compensation value.

9. A compensation device for a display device, characterized in that, The display device includes a display panel and a backlight module. The display panel is divided into multiple display zones, and the backlight module includes multiple backlight zones. The display zones and the backlight zones correspond one-to-one. The compensation device includes: The acquisition module is used to acquire the display brightness value of the pixels in the display partition at a preset grayscale and to acquire the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value. The compensation module is used to determine the target backlight zone, obtain the backlight compensation value corresponding to other backlight zones according to the target backlight value, and correct the backlight brightness value of other backlight zones according to the backlight compensation value. Specifically, the acquisition module is used to acquire the display color temperature value of each pixel in the display partition at 255 grayscale, as well as the display brightness value and display chromaticity value corresponding to the display color temperature value; acquire the backlight brightness value of the backlight partition corresponding to the display partition based on the display brightness value; and calculate the tristimulus value of the white screen of the display partition based on the display brightness value and the display chromaticity value.

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