Display compensation method and display compensation equipment

Abstract

The invention discloses a display compensation method and display compensation equipment, and the method comprises the steps: firstly obtaining a display image with a first brightness non-uniform region, then adjusting a compensation gray-scale value corresponding to the first brightness non-uniform region based on an initial compensation gray-scale value, and controlling the brightness of a display region based on the adjusted compensation gray-scale value. And after determining that the non-uniform brightness area does not exist, sending the adjusted compensation gray scale value to a time schedule controller of the display equipment. The brightness of the display area of the display device is controlled by using the adjusted compensation gray-scale value, and after it is determined that no area with uneven brightness exists, the adjusted compensation gray-scale value is sent to the time schedule controller of the display device, and the display device controls the brightness of the display area based on the compensation gray-scale value stored in the time schedule controller. Therefore, when the display device displays the image, the watermark existing on the display picture is solved, and the display effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display compensation method and a display compensation device. Background Art

[0002] At present, the display industry is developing towards larger size, higher refresh rate and higher resolution. High refresh rate and higher resolution require shorter pixel charging time, and Mura (uneven brightness) may occur on the display.

[0003] To address the pixel charging problem, a LOD (Line Over Driver) IP (Intellectual Property, a general term for integrated circuit cores with intellectual property cores) module is currently used to provide LOD compensation grayscale values ​​to pixels for pixel charging compensation; to address the Mura phenomenon, a Demura (brightness uniformity) IP module is usually used to provide Demura compensation grayscale values ​​to pixels in the Mura area to compensate or weaken the grayscale values ​​of the pixels in the Mura area.

[0004] When LOD compensation and Demura compensation are turned on at the same time, conflicts may occur, causing watermarks and affecting the display effect of the monitor. Summary of the invention

[0005] The present invention provides a display compensation method and a display compensation device, which are used to solve the problem in the prior art that a watermark exists in a display picture and affects the display effect of a liquid crystal display screen.

[0006] In a first aspect, the present application provides a display compensation method, the method comprising:

[0007] Acquire a display image having a first uneven brightness area;

[0008] Based on the initial compensation grayscale value, adjusting the compensation grayscale value corresponding to the pixel point in the first uneven brightness area to obtain an adjusted compensation grayscale value;

[0009] The brightness of the display area of ​​the display device is controlled based on the adjusted compensation grayscale value. When it is determined that there is no area with uneven brightness in the displayed image, the adjusted compensation grayscale value is sent to the timing controller of the display device, and the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller.

[0010] In a possible implementation, the compensated grayscale value includes a first compensated grayscale value; and after the brightness of a display area of ​​the display device is controlled based on the adjusted compensated grayscale value, the method further includes:

[0011] Determining that a second uneven brightness area exists in the displayed image, wherein the compensated grayscale value further includes a second compensated grayscale value;

[0012] Based on the initial compensation grayscale value, adjusting a second compensation grayscale value corresponding to a pixel point in the second uneven brightness area;

[0013] controlling the brightness of a display area of ​​the display device based on the adjusted first compensated grayscale value and the adjusted second compensated grayscale value;

[0014] Determine whether there is an uneven brightness region in the displayed image, and if so, return to the step of determining whether there is a second uneven brightness region in the displayed image until it is determined that there is no uneven brightness region in the displayed image;

[0015] The adjusted first compensation grayscale value and the adjusted second compensation grayscale value are sent to a timing controller of the display device.

[0016] In a possible implementation, adjusting the second compensation grayscale value corresponding to the pixel point in the second uneven brightness area based on the initial compensation grayscale value includes:

[0017] For each second pixel in the second uneven brightness area, determining whether the brightness of the second pixel is greater than the brightness of the second target pixel;

[0018] If it is greater than, reducing the second compensated grayscale value corresponding to the second pixel by a preset multiple of the initial compensated grayscale value;

[0019] If it is less than, increasing the second compensated grayscale value corresponding to the second pixel point by the preset multiple of the initial compensated grayscale value;

[0020] The second target pixel point is adjacent to an edge pixel point of the second uneven brightness area.

[0021] In a possible implementation, adjusting the compensation grayscale value corresponding to the pixel point in the first uneven brightness area based on the initial compensation grayscale value to obtain the adjusted compensation grayscale value includes:

[0022] For each first pixel in the first uneven brightness area, determining whether the brightness of the first pixel is greater than the brightness of a first target pixel;

[0023] If it is greater than, reducing the compensation grayscale value corresponding to the first pixel by a preset multiple of the initial compensation grayscale value;

[0024] If it is less than, increasing the compensation grayscale value corresponding to the first pixel point by the preset multiple of the initial compensation grayscale value;

[0025] The first target pixel point is adjacent to an edge pixel point of the first uneven brightness area.

[0026] In a possible implementation manner, before controlling the brightness of a display area of ​​a display device based on the adjusted compensation grayscale value, the method further includes:

[0027] Adjusting the grayscale value of the first backlight area corresponding to the first uneven brightness area to obtain an adjusted grayscale value of the first backlight area;

[0028] The method of controlling the brightness of a display area of ​​a display device based on the adjusted compensation grayscale value, and sending the adjusted compensation grayscale value to a timing controller of the display device when it is determined that there is no uneven brightness area in the displayed image, comprises:

[0029] Controlling the brightness of a display area of ​​the display device based on the adjusted compensated grayscale value and the adjusted grayscale value of the first backlight area;

[0030] When it is determined that there is no uneven brightness area in the displayed image, the adjusted compensation grayscale value and the adjusted first backlight area grayscale value are sent to the timing controller of the display device.

[0031] In a possible implementation, after controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value and the adjusted first backlight area grayscale value, the method further includes:

[0032] Determining that a third uneven brightness region exists in the displayed image;

[0033] Adjusting the grayscale value of the second backlight area corresponding to the third uneven brightness area to obtain an adjusted grayscale value of the second backlight area;

[0034] Controlling the brightness of the display area of ​​the display device based on the adjusted compensated grayscale value and the adjusted second backlight area grayscale value;

[0035] Determine whether there is a brightness uneven region in the displayed image, and if so, return to the step of determining whether there is a third brightness uneven region in the displayed image until it is determined that there is no brightness uneven region in the displayed image.

[0036] In a possible implementation, the adjusting the grayscale value of the first backlight area corresponding to the first uneven brightness area to obtain the adjusted grayscale value of the first backlight area includes:

[0037] If the brightness of the first pixel is greater than the brightness of the first target pixel, reducing the grayscale value of the backlight area corresponding to the first pixel;

[0038] If the brightness of the first pixel is lower than the brightness of the first target pixel, the grayscale value of the backlight area corresponding to the first pixel is increased.

[0039] In a second aspect, the present application further provides a display compensation device, comprising:

[0040] An acquisition module, used for acquiring a display image having a first uneven brightness area;

[0041] An adjustment module, configured to adjust the compensation grayscale value corresponding to the pixel point in the first uneven brightness area based on the initial compensation grayscale value to obtain an adjusted compensation grayscale value;

[0042] A control module is used to control the brightness of a display area of ​​a display device based on an adjusted compensation grayscale value. When it is determined that there is no area with uneven brightness in a displayed image, the control module sends the adjusted compensation grayscale value to a timing controller of the display device, and the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller.

[0043] In a possible implementation, a determination module is further included; the compensation grayscale value includes a first compensation grayscale value; after the brightness of the display area of ​​the display device is controlled based on the adjusted compensation grayscale value:

[0044] The determination module is further used to determine whether a second uneven brightness area exists in the displayed image, wherein the compensation grayscale value further includes a second compensation grayscale value;

[0045] The adjustment module is further configured to adjust a second compensation grayscale value corresponding to a pixel point in the second uneven brightness area based on the initial compensation grayscale value;

[0046] The control module is also used to control the brightness of the display area of ​​the display device based on the adjusted first compensation grayscale value and the adjusted second compensation grayscale value; determine whether there is an uneven brightness area in the displayed image, and if so, return to the step of determining whether there is a second uneven brightness area in the displayed image until it is determined that there is no uneven brightness area in the displayed image; and send the adjusted first compensation grayscale value and the adjusted second compensation grayscale value to the timing controller of the display device.

[0047] In a possible implementation manner, the adjustment module is specifically used to:

[0048] For each second pixel in the second uneven brightness area, determining whether the brightness of the second pixel is greater than the brightness of the second target pixel;

[0049] If it is greater than, reducing the second compensated grayscale value corresponding to the second pixel by a preset multiple of the initial compensated grayscale value;

[0050] If it is less than, increasing the second compensated grayscale value corresponding to the second pixel point by the preset multiple of the initial compensated grayscale value;

[0051] The second target pixel point is adjacent to an edge pixel point of the second uneven brightness area.

[0052] In a possible implementation manner, the adjustment module is specifically used to:

[0053] For each first pixel in the first uneven brightness area, determining whether the brightness of the first pixel is greater than the brightness of a first target pixel;

[0054] If it is greater than, reducing the compensation grayscale value corresponding to the first pixel by a preset multiple of the initial compensation grayscale value;

[0055] If it is less than, increasing the compensation grayscale value corresponding to the first pixel point by the preset multiple of the initial compensation grayscale value;

[0056] The first target pixel point is adjacent to an edge pixel point of the first uneven brightness area.

[0057] In a possible implementation, before controlling the brightness of a display area of ​​the display device based on the adjusted compensation grayscale value, the adjustment module is further configured to:

[0058] Adjusting the grayscale value of the backlight area corresponding to the first uneven brightness area to obtain an adjusted grayscale value of the backlight area;

[0059] The control module is specifically used for:

[0060] Controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value and the adjusted backlight area grayscale value;

[0061] When it is determined that there is no uneven brightness area in the displayed image, the adjusted compensation grayscale value and the adjusted grayscale value of the backlight area are sent to the timing controller of the display device.

[0062] In a possible implementation, after controlling the brightness of the display area of ​​the display device based on the adjusted compensated grayscale value and the adjusted grayscale value of the backlight area:

[0063] The determination module is further used to determine whether a third uneven brightness area exists in the displayed image;

[0064] The adjustment module is further used to adjust the grayscale value of the second backlight area corresponding to the third uneven brightness area to obtain an adjusted grayscale value of the second backlight area;

[0065] The control module is also used to control the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value and the adjusted second backlight area grayscale value; determine whether there is an uneven brightness area in the displayed image, and if so, return to the step of determining whether there is a third uneven brightness area in the displayed image until it is determined that there is no uneven brightness area in the displayed image.

[0066] In a possible implementation manner, the adjustment module is specifically used to:

[0067] If the brightness of the first pixel is greater than the brightness of the first target pixel, reducing the grayscale value of the backlight area corresponding to the first pixel;

[0068] If the brightness of the first pixel is lower than the brightness of the first target pixel, the grayscale value of the backlight area corresponding to the first pixel is increased.

[0069] The beneficial effects of the present invention are as follows:

[0070] The embodiment of the present application provides a display compensation method and display compensation device, the method comprising: first obtaining a display image with a first uneven brightness area, then adjusting the compensation grayscale value corresponding to the first uneven brightness area based on the initial compensation grayscale value, obtaining the adjusted compensation grayscale value, using the adjusted compensation grayscale value to control the brightness of the display area of ​​the display device, after determining that there is no uneven brightness area, sending the adjusted compensation grayscale value to the timing controller of the display device, the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller. Since after determining that there is a first uneven brightness area in the display image, that is, determining that there is a watermark phenomenon, based on the initial compensation grayscale value, adjusting the compensation grayscale value corresponding to the first uneven brightness area, using the adjusted compensation grayscale value to control the brightness of the display area of ​​the display device, after determining that there is no uneven brightness area, sending the adjusted compensation grayscale value to the timing controller of the display device, the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller, so that when the display device displays an image, the watermark on the display screen is solved and the display effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0072] Figure 1 A schematic diagram of a display screen having a Mura area provided in an embodiment of the present application;

[0073] Figure 2 A schematic diagram of a display screen with a watermark provided in an embodiment of the present application;

[0074] Figure 3 A flow chart of a display compensation method provided in an embodiment of the present application;

[0075] Figure 4 A schematic diagram of a display area provided in an embodiment of the present application;

[0076] Figure 5 A schematic flow chart of another display compensation method provided in an embodiment of the present application;

[0077] Figure 6 A schematic flow chart of another display compensation method provided in an embodiment of the present application;

[0078] Figure 7 A schematic flow chart of another display compensation method provided in an embodiment of the present application;

[0079] Figure 8 A schematic diagram of the structure of a display compensation device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0080] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0081] like Figure 1 As shown in FIG. 1 , in the display area of ​​the LCD screen, the L32 area is the Mura area. After the L32 area is subjected to Demura processing, the grayscale value of the pixel points in the L32 area is equal to L64+L32, that is, L96. If the LOD compensation is also turned on at this time, the grayscale value of some pixels in the display area is L96+x, where x is the LOD compensation grayscale value from L64 to L96. Figure 2 As shown in the figure, a bright area or a dark area appears at the edge of the original Mura area in the display image. This phenomenon is called watermark.

[0082] In order to solve the watermark phenomenon and improve the display effect, the embodiment of the present application provides a display compensation method and a display compensation device, which are described in detail below with reference to the accompanying drawings.

[0083] like Figure 3FIG. 1 is a flow chart of a display compensation method provided in an embodiment of the present application, which specifically includes the following steps:

[0084] S301, acquiring a display image having a first uneven brightness area;

[0085] S302, adjusting the compensation grayscale value corresponding to the pixel point in the first uneven brightness area based on the initial compensation grayscale value to obtain an adjusted compensation grayscale value;

[0086] S303, controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value, and when it is determined that there is no area with uneven brightness in the displayed image, sending the adjusted compensation grayscale value to the timing controller of the display device, and the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller.

[0087] In the embodiment of the present application, a display image having a first uneven brightness region is first obtained, and then based on the initial compensation grayscale value, the compensation grayscale value corresponding to the first uneven brightness region is adjusted to obtain the adjusted compensation grayscale value, and the brightness of the display region of the display device is controlled by using the adjusted compensation grayscale value, and after determining that there is no uneven brightness region, the adjusted compensation grayscale value is sent to the timing controller of the display device, and the display device controls the brightness of the display region based on the compensation grayscale value stored in the timing controller. Since after determining that there is a first uneven brightness region in the display image, that is, determining that there is a watermark phenomenon, the compensation grayscale value corresponding to the first uneven brightness region is adjusted based on the initial compensation grayscale value, and the brightness of the display region of the display device is controlled by using the adjusted compensation grayscale value, and after determining that there is no uneven brightness region, the adjusted compensation grayscale value is sent to the timing controller of the display device, and the display device controls the brightness of the display region based on the compensation grayscale value stored in the timing controller, so that when the display device displays an image, the watermark on the display screen is solved and the display effect is improved.

[0088] The display compensation method in the embodiment of the present application is executed during the production process of the display device. The execution subject may be a display compensation device, such as a Demura device. Before obtaining a display image with a first uneven brightness area, it is first determined that there is a first uneven brightness area in the display image.

[0089] Specifically, a photograph is first taken of the display image. A demura device may be used to take a photograph of the display area of ​​the display device. The photographed image is then analyzed to determine whether there is an area with uneven brightness in the photographed image. The display image is processed for uneven brightness, such as demura processing. At the same time, LOD processing is performed on the display image. The display area of ​​the display device is then photographed by the demura device. The photographed image is then analyzed to determine whether there is an area with uneven brightness in the photographed image. If so, the coordinates of the area with uneven brightness are determined, thereby determining the pixel points corresponding to the area with uneven brightness.

[0090] It should be noted that in the embodiment of the present application, photographing the display area of ​​the display device and analyzing the photographed image to determine whether there is an area with uneven brightness in the photographed image, and when it is determined that there is an area with uneven brightness, determining the coordinates of the area with uneven brightness are all automatically completed by the machine, such as performing the above operations through a preset algorithm.

[0091] In the embodiment of the present application, the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller, and this is performed during normal display of the display device. That is, after the compensation grayscale value is determined by the embodiment of the present application, the compensation grayscale value is sent to the timing controller of the display device, and the timing controller stores the compensation grayscale value. During the use of the display device, the brightness of the display area is controlled based on the compensation grayscale value.

[0092] In a specific implementation, based on the initial compensation grayscale value, the compensation grayscale value corresponding to the pixel point in the first uneven brightness area is adjusted to obtain an adjusted compensation grayscale value. The compensation grayscale value here can be a first compensation grayscale value or a second compensation grayscale value. The first compensation grayscale value can be a LOD compensation grayscale value, and the second compensation grayscale value can be a Demura compensation grayscale value. In addition, the initial compensation grayscale value in the embodiment of the present application can be an initial LOD compensation grayscale value. The following takes the initial compensation grayscale value as the initial LOD compensation grayscale value as an example to explain the compensation grayscale value as the LOD compensation grayscale value and the compensation grayscale value as the Demura compensation grayscale value, respectively.

[0093] In one embodiment, when the compensation grayscale value is the LOD compensation grayscale value, a display image having a first uneven brightness area is first acquired, and then based on the initial LOD compensation grayscale value, the LOD compensation grayscale value corresponding to the pixel point in the first uneven brightness area is adjusted to obtain an adjusted LOD compensation grayscale value, and the brightness of the display area is controlled based on the adjusted LOD grayscale compensation value. If it is determined that there is no uneven brightness area, the adjusted LOD compensation grayscale value is sent to a timing controller of the display device, and the timing controller saves the received adjusted LOD compensation grayscale value. When the display device is displayed, the brightness of the display area is controlled based on the LOD compensation grayscale value saved in the timing controller.

[0094] In the embodiment of the present application, since the LOD compensation grayscale value corresponding to the pixel point in the first uneven brightness area is adjusted, and the adjusted LOD compensation grayscale value is used to control the brightness of the display area of ​​the display device, it is determined that there is no uneven brightness area, that is, the watermark on the display screen is eliminated. Therefore, the display compensation method provided in the embodiment of the present application can improve the display effect of the display device.

[0095] It should be noted that the initial LOD compensation grayscale value in the embodiment of the present application is the LOD grayscale compensation value after LOD processing, that is, the LOD grayscale compensation value when LOD compensation is performed.

[0096] In a specific implementation, based on the initial LOD compensation grayscale value, the LOD compensation grayscale value corresponding to the pixel point of the first uneven brightness area is adjusted. The LOD compensation grayscale value can be lowered or increased. Specifically, for each first pixel point in the first uneven brightness area, it is determined whether the brightness of the first pixel point is greater than the brightness of the first target pixel point. If so, the LOD compensation grayscale value of the first pixel point is lowered based on the initial LOD compensation grayscale value of the first pixel point. If the brightness of the first pixel point is less than the brightness of the first target pixel point, the LOD compensation grayscale value of the first pixel point is increased based on the initial LOD compensation grayscale value of the first pixel point, wherein the first target pixel point is a pixel point adjacent to the edge pixel point of the first uneven brightness area.

[0097] like Figure 4 As shown, it is a schematic diagram of a display area of ​​a display device provided in an embodiment of the present application, the dotted box is the first uneven brightness area, pixel 1 is the first pixel in the first uneven brightness area, and the first target pixel is the pixel adjacent to the edge pixel of the first uneven brightness area.

[0098] It should be noted that the first target pixel point can be a pixel point located in the same column as the first pixel point and adjacent to the upper edge pixel point of the first uneven brightness area, or a pixel point located in the same column as the first pixel point and adjacent to the lower edge pixel point of the first uneven brightness area, or a pixel point located in the same row as the first pixel point and adjacent to the left edge pixel point of the first uneven brightness area, or a pixel point located in the same row as the first pixel point and adjacent to the right edge pixel point of the first uneven brightness area. The embodiments of the present application do not impose any limitations on this.

[0099] Reference Figure 4 For example, if it is determined that the brightness of pixel 1 in the first uneven brightness area is greater than the brightness of the first target pixel, it means that the brightness of pixel 1 needs to be reduced, so the LOD compensation grayscale value corresponding to pixel 1 is reduced by 1 / 3 times the initial LOD compensation grayscale value, where the initial LOD compensation grayscale value is the initial LOD compensation grayscale value corresponding to pixel 1;

[0100] For another example, if it is determined that the brightness of pixel 1 in the first uneven brightness area is less than the brightness of the first target pixel, it means that the brightness of the first uneven brightness area needs to be increased, and the LOD compensation grayscale value corresponding to pixel 1 is increased by 1 / 3 times the initial LOD compensation grayscale value, where the initial LOD compensation grayscale value is the initial LOD compensation grayscale value corresponding to pixel 1.

[0101] It should be noted that Figure 4 Only part of the pixels in the display area are shown, and the pixels in other parts are not drawn.

[0102] In a specific implementation, after the brightness of the display area is controlled based on the adjusted LOD compensation grayscale value, there may still be areas of uneven brightness on the display screen. Specifically, the brightness of the display area is controlled based on the adjusted LOD compensation grayscale value, and it is determined whether there is a second area of ​​uneven brightness in the displayed image. If so, the Demura compensation grayscale value corresponding to the second pixel point in the second area of ​​uneven brightness is adjusted based on the initial LOD compensation grayscale value, and the brightness of the display area of ​​the display device is controlled based on the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value, and the step of determining whether there is a second area of ​​uneven brightness in the displayed image is returned until there is no area of ​​uneven brightness in the displayed image; if there is no area of ​​uneven brightness in the displayed image, the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value are sent to the timing controller of the display device.

[0103] It should be noted that the first uneven brightness region and the second uneven brightness region in the embodiment of the present application may be the same or different.

[0104] Specifically, whether there is an area with uneven brightness in the displayed image can be determined by taking a photo of the displayed area.

[0105] For example, after performing demura processing and LOD processing on the display device, a display area of ​​the display device is photographed, and by analyzing the photographed image, it is determined whether there is a first uneven brightness area in the display image;

[0106] If it is determined that there is a first uneven brightness area in the displayed image, determine the first pixel in the first uneven brightness area, and for each first pixel in the first uneven brightness area, determine whether the brightness of the first pixel is greater than the brightness of the first target pixel. If the brightness of the first pixel is greater than the brightness of the first target pixel, reduce the initial LOD compensation grayscale value of the first pixel by 1 / 3. For example, if the initial LOD compensation grayscale value of the first pixel is x, the adjusted LOD compensation grayscale value of the first pixel is 2 / 3 times the initial LOD compensation grayscale value.

[0107] If the brightness of the first pixel is less than the brightness of the first target pixel, the initial LOD compensation grayscale value of the first pixel is increased by 1 / 3. For example, if the initial LOD compensation grayscale value of the first pixel is x, the adjusted LOD compensation grayscale value of the first pixel is 4 / 3 times the initial LOD compensation grayscale value.

[0108] Based on the adjusted LOD compensation grayscale value, the brightness of the display area is controlled, and then the display area is photographed to determine whether there is a second uneven brightness area in the current display image. If so, the second pixel in the second uneven brightness area is determined, and for each second pixel in the second uneven brightness area, whether the brightness of the second pixel is greater than the brightness of the second target pixel is determined. If greater, the Demura compensation grayscale value corresponding to the second pixel is reduced by 1 / 3 times the initial LOD compensation grayscale value. For example, the Demura compensation grayscale value corresponding to the second pixel is a, and the initial LOD compensation grayscale value is x, then the adjusted Demura compensation grayscale value is a-1 / 3x;

[0109] If it is less than, the Demura compensation grayscale value corresponding to the second pixel point is increased by 1 / 3 times the initial LOD compensation grayscale value. For example, if the Demura compensation grayscale value corresponding to the second pixel point is a, and the initial LOD compensation grayscale value is x, then the adjusted Demura compensation grayscale value is a+1 / 3x;

[0110] After adjusting both the LOD compensation grayscale value and the Demura compensation grayscale value, the brightness of the display area is controlled based on the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value, and then the display area is photographed to determine whether there is an uneven brightness area in the current display image. If so, the Demura compensation grayscale value of the pixel points in the uneven brightness area continues to be adjusted until there is no uneven brightness area in the display area, and the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value are sent to the timing controller of the display device.

[0111] In the embodiment of the present application, the second target pixel point is a pixel point adjacent to an edge pixel point of the second uneven brightness area.

[0112] In the above, when it is first confirmed that there are areas with uneven brightness in the displayed image, after adjusting the LOD compensation grayscale value, if there are still areas with uneven brightness in the displayed image, the Demura compensation grayscale value is adjusted. In another embodiment, when it is first confirmed that there are areas with uneven brightness in the displayed image, after adjusting the LOD compensation grayscale value, the grayscale value of the backlight area corresponding to the area with uneven brightness is adjusted. The embodiments of the present application are described below.

[0113] After adjusting the LOD compensation grayscale value of the pixel point corresponding to the first uneven brightness display area, adjust the grayscale value of the first backlight area corresponding to the first uneven brightness area, and control the brightness of the display area based on the adjusted LOD compensation grayscale value and the adjusted grayscale value of the first backlight area. Then, determine whether there is a third uneven brightness area in the displayed image. If not, send the adjusted LOD compensation grayscale value and the adjusted grayscale value of the first backlight area to the timing controller. If so, adjust the grayscale value of the second backlight area corresponding to the third uneven brightness area based on the initial LOD compensation grayscale value until there is no uneven brightness area in the displayed image, and send the adjusted LOD compensation grayscale value and the adjusted grayscale value of the third backlight area to the timing controller.

[0114] In an embodiment of the present application, it is first determined whether there is a first uneven brightness area in the display image after demura processing and LOD processing, and then the display image with the first uneven brightness area is obtained, the LOD compensation grayscale value corresponding to the first uneven brightness area is adjusted, and then the grayscale value of the first backlight area corresponding to the first uneven brightness area is adjusted. Through two grayscale value adjustments, the uneven brightness area in the display image is reduced.

[0115] Specifically, when adjusting the grayscale value of the first backlight area corresponding to the first uneven brightness area, the adjustment can be made based on the initial LOD compensation grayscale value, or based on the preset grayscale value. For example, if it is determined that the brightness of the pixel in the first uneven brightness area is lower than the brightness of the target pixel, the current grayscale value of the first backlight area is increased by 1 / 3 of the initial LOD grayscale value, or the current grayscale value of the first backlight area is increased by the preset grayscale value b. If it is determined that the brightness of the pixel in the first uneven brightness area is higher than the brightness of the target pixel, the current grayscale value of the first backlight area is reduced by 1 / 3 of the initial LOD grayscale value, or the current grayscale value of the first backlight area is reduced by the preset grayscale value b.

[0116] In one embodiment, if there is still an uneven display area in the displayed image after adjusting the grayscale value twice, it is necessary to continue to adjust. Specifically, after adjusting the grayscale value twice, the brightness of the display area is controlled based on the adjusted LOD compensation grayscale value and the grayscale value of the first backlight area. If it is determined that there is a second uneven brightness area in the displayed image, the grayscale value of the second backlight area corresponding to the second uneven brightness area is adjusted until there is no uneven brightness area in the displayed image.

[0117] In a specific implementation, after determining that there is a second area of ​​uneven brightness in the displayed image, the brightness of the pixels in the second area of ​​uneven brightness is compared with the brightness of the target pixel. If the brightness of the pixels in the second area of ​​uneven brightness is less than the brightness of the target pixel, the current grayscale value of the second backlight area is increased by 1 / 3 of the initial LOD compensation grayscale value. If the brightness of the pixels in the second area of ​​uneven brightness is greater than the brightness of the target pixel, the current grayscale value of the second backlight area is reduced by 1 / 3 of the initial LOD compensation grayscale value.

[0118] The above is an explanation of when the compensation grayscale value is the LOD compensation grayscale value. The following is an explanation of when the compensation grayscale value is the Demura compensation grayscale value.

[0119] When the compensation grayscale value is the Demura compensation grayscale value, it is first determined that there is a first uneven brightness area in the display image after the Demura processing and the LOD processing, and then the display image with the first uneven brightness area is obtained, and based on the initial LOD compensation grayscale value, the Demura compensation grayscale value corresponding to the first uneven brightness area is adjusted to obtain the adjusted Demura compensation grayscale value, and the brightness of the display area is controlled based on the adjusted Demura compensation grayscale value. If it is determined that there is no uneven brightness area in the display image, the adjusted Demura compensation grayscale value is sent to the timing controller of the display device, and the timing controller saves the Demura compensation grayscale value. When the display device is used normally, the brightness of the display area is controlled based on the Demura compensation grayscale value saved in the timing controller, thereby eliminating the watermark on the display screen and improving the display effect.

[0120] In one embodiment, after adjusting the Demura compensation grayscale value, the grayscale value of the first backlight area corresponding to the first uneven brightness area is adjusted, and then the brightness of the display area is controlled based on the adjusted Demura compensation grayscale value and the grayscale value of the first backlight area. If it is determined that there is no uneven brightness area in the displayed image, the adjusted Demura compensation grayscale value and the adjusted grayscale value of the first backlight area are sent to the timing controller of the display device, and the timing controller saves the adjusted Demura compensation grayscale value and the adjusted grayscale value of the first backlight area. When the display device works normally, the display device controls the brightness of the display area of ​​the display device based on the Demura compensation grayscale value and the grayscale value of the first backlight area saved in the timing controller.

[0121] In an embodiment of the present application, it is first determined whether there is a first uneven brightness area in the display image after demura processing and LOD processing, and then the demura compensation grayscale value corresponding to the first uneven brightness area is adjusted, and then the grayscale value of the first backlight area corresponding to the first uneven brightness area is adjusted. After the grayscale value is adjusted twice, after it is determined that there is no uneven brightness area in the display image, the grayscale values ​​obtained by the two adjustments are sent to the timing controller of the display device. When the display device is working normally, the brightness of the display area is controlled based on the grayscale value saved in the timing controller, so as to reduce the uneven brightness area in the display image and improve the display effect.

[0122] Specifically, when adjusting the grayscale value of the first backlight area corresponding to the first uneven brightness area, the adjustment can also be made based on the initial LOD compensation grayscale value, or based on the preset grayscale value. For example, if it is determined that the brightness of the pixel in the first uneven brightness area is lower than the brightness of the target pixel, the current grayscale value of the first backlight area is increased by 1 / 3 of the initial LOD grayscale value, or the current grayscale value of the first backlight area is increased by the preset grayscale value b; if it is determined that the brightness of the pixel in the first uneven brightness area is higher than the brightness of the target pixel, the current grayscale value of the first backlight area is reduced by 1 / 3 of the initial LOD grayscale value, or the current grayscale value of the first backlight area is reduced by the preset grayscale value b.

[0123] In one embodiment, if there is still an area with uneven brightness in the displayed image after adjusting the grayscale value twice, it is necessary to continue adjusting. Specifically, the brightness of the display area is controlled based on the grayscale value after the two adjustments, and it is determined that there is a second area with uneven brightness in the displayed image, and the grayscale value of the second backlight area corresponding to the second area with uneven brightness is adjusted until there is no area with uneven brightness in the displayed image.

[0124] In a specific implementation, the brightness of the pixel points in the third uneven brightness area is compared with the brightness of the target pixel points. If the brightness of the pixel points in the third uneven brightness area is less than the brightness of the target pixel points, the current grayscale value of the second backlight area is increased by 1 / 3 times the initial LOD compensation grayscale value, or the current grayscale value of the second backlight area is increased by a preset grayscale value b. If the brightness of the pixel points in the third uneven brightness area is greater than the brightness of the target pixel points, the current grayscale value of the second backlight area is reduced by 1 / 3 times the initial LOD compensation grayscale value, or the current grayscale value of the second backlight area is reduced by a preset grayscale value b.

[0125] For ease of understanding, the present application is described below through specific embodiments.

[0126] like Figure 5 As shown, a display compensation method provided by an embodiment of the present application specifically includes the following steps:

[0127] S501, determining that a first uneven brightness region exists in the display image after demura processing and LOD processing;

[0128] S502, adjusting the LOD compensation grayscale value corresponding to the first uneven brightness area based on the initial LOD compensation grayscale value to obtain an adjusted LOD compensation grayscale value;

[0129] S503, controlling the brightness of a display area of ​​a display device based on the adjusted LOD compensation grayscale value;

[0130] S504, determining whether there is an uneven brightness area in the display image of the display device, if so, executing S505, otherwise executing S509;

[0131] S505, adjusting the Demura compensation grayscale value corresponding to the uneven brightness area based on the initial LOD compensation grayscale value to obtain an adjusted Demura compensation grayscale value;

[0132] S506, controlling the brightness of the display area of ​​the display device based on the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value;

[0133] S507, determining whether there is an uneven brightness area in the display image of the display device, if so, executing S505, otherwise executing S508;

[0134] S508, sending the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value to the timing controller of the display device;

[0135] S509 , sending the adjusted LOD compensation grayscale value to the timing controller of the display device.

[0136] like Figure 6 FIG. 1 is a flow chart of another display compensation method provided in an embodiment of the present application, which specifically includes the following steps:

[0137] S601, determining that there is an uneven brightness area in the display image after demura processing and LOD processing;

[0138] S602, adjusting the LOD compensation grayscale value corresponding to the uneven brightness area based on the initial LOD compensation grayscale value to obtain an adjusted LOD compensation grayscale value;

[0139] S603, adjusting the grayscale value of the backlight area corresponding to the uneven brightness area;

[0140] S604, controlling the brightness of the display area of ​​the display device based on the adjusted LOD compensation grayscale value and the adjusted grayscale value of the backlight area;

[0141] S605, determining whether there is an uneven brightness area in the display image of the display device, if so, returning to S603, otherwise executing S606;

[0142] S606 : Send the adjusted LOD compensation grayscale value and the adjusted grayscale value of the backlight partition to the timing controller of the display device.

[0143] like Figure 7 FIG. 1 is a flow chart of another display compensation method provided in an embodiment of the present application, which specifically includes the following steps:

[0144] S701, determining that there is an uneven brightness area in the display image after demura processing and LOD processing;

[0145] S702, adjusting the Demura compensation grayscale value corresponding to the uneven brightness area based on the initial LOD compensation grayscale value to obtain an adjusted Demura compensation grayscale value;

[0146] S703, adjusting the grayscale value of the backlight area corresponding to the uneven brightness area;

[0147] S704, controlling the brightness of the display area of ​​the display device based on the adjusted Demura compensation grayscale value and the adjusted grayscale value of the backlight area;

[0148] S705, determining whether there is an uneven brightness area in the display image of the display device, if so, executing S703, otherwise executing S706;

[0149] S706 , sending the adjusted demura compensation grayscale value and the adjusted grayscale value of the backlight area to the timing controller of the display device.

[0150] The display compensation method provided in the embodiment of the present application, when it is determined that there is an uneven brightness area on the display image after Demura processing and LOD processing, adjusts the LOD compensation grayscale value corresponding to the uneven brightness area, or the Demura compensation grayscale value corresponding to the uneven brightness area, or adjusts the LOD compensation grayscale value while adjusting the grayscale value of the backlight area corresponding to the uneven brightness area, or adjusts the Demura compensation grayscale value while adjusting the grayscale value of the backlight area corresponding to the uneven brightness area, thereby achieving the absence of uneven brightness areas in the display area and improving the display effect of the display device.

[0151] Based on the same inventive concept, an embodiment of the present application also provides a display compensation device. The principle of solving the technical problem by the display compensation device is similar to the principle of solving the technical problem by the display compensation method provided in the above embodiment. The implementation of the display compensation device can refer to the implementation of the display compensation method, and the repeated parts will not be repeated.

[0152] like Figure 8 FIG. 1 is a schematic diagram of a structure of a display compensation device provided in an embodiment of the present application, comprising:

[0153] An acquisition module 801 is used to acquire a display image having a first uneven brightness area;

[0154] An adjustment module 802 is used to adjust the compensation grayscale value corresponding to the pixel point in the first uneven brightness area based on the initial LOD compensation grayscale value to obtain an adjusted compensation grayscale value, wherein the compensation grayscale value includes the LOD compensation grayscale value or the Demura compensation grayscale value;

[0155] The control module 803 is used to control the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value. When it is determined that there is no area with uneven brightness in the displayed image, the adjusted compensation grayscale value is sent to the timing controller of the display device, and the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller.

[0156] In one embodiment, a determination module is further included; the compensation grayscale value includes an LOD compensation grayscale value; after the brightness of the display area of ​​the display device is controlled based on the adjusted compensation grayscale value:

[0157] The determination module is further used to determine whether a second uneven brightness area exists in the displayed image;

[0158] The adjustment module is further configured to adjust the Demura compensation grayscale value corresponding to the pixel point in the second uneven brightness area based on the initial LOD compensation grayscale value;

[0159] The control module is also used to control the brightness of the display area of ​​the display device based on the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value; determine whether there is an uneven brightness area in the displayed image, and if so, return to the step of determining whether there is a second uneven brightness area in the displayed image until it is determined that there is no uneven brightness area in the displayed image; and send the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value to the timing controller of the display device.

[0160] In one embodiment, the adjustment module is specifically used to:

[0161] For each second pixel in the second uneven brightness area, determining whether the brightness of the second pixel is greater than the brightness of the second target pixel;

[0162] If it is greater than, the Demura compensation grayscale value corresponding to the second pixel point is reduced by a preset multiple of the initial LOD compensation grayscale value;

[0163] If it is less than, the Demura compensation grayscale value corresponding to the second pixel point is increased by the preset multiple of the initial LOD compensation grayscale value;

[0164] The second target pixel point is adjacent to an edge pixel point of the second uneven brightness area.

[0165] In one embodiment, the adjustment module is specifically used to:

[0166] For each first pixel in the first uneven brightness area, determining whether the brightness of the first pixel is greater than the brightness of a first target pixel;

[0167] If it is greater than, the compensation grayscale value corresponding to the first pixel point is reduced by a preset multiple of the initial LOD compensation grayscale value;

[0168] If it is less than, the compensation grayscale value corresponding to the first pixel point is increased by the preset multiple of the initial LOD compensation grayscale value;

[0169] The first target pixel point is adjacent to an edge pixel point of the first uneven brightness area.

[0170] In one embodiment, before controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value, the adjustment module is further used to:

[0171] Adjusting the grayscale value of the backlight area corresponding to the first uneven brightness area to obtain an adjusted grayscale value of the backlight area;

[0172] The control module is specifically used for:

[0173] Controlling the brightness of the display area of ​​the display device based on the adjusted LOD compensation grayscale value and the adjusted backlight area grayscale value;

[0174] When it is determined that there is no uneven brightness area in the displayed image, the adjusted LOD compensation grayscale value and the adjusted grayscale value of the backlight area are sent to the timing controller of the display device.

[0175] In one embodiment, after controlling the brightness of the display area of ​​the display device based on the adjusted LOD compensation grayscale value and the adjusted grayscale value of the backlight area:

[0176] The determination module is further used to determine whether a third uneven brightness area exists in the displayed image;

[0177] The adjustment module is further used to adjust the grayscale value of the second backlight area corresponding to the third uneven brightness area to obtain an adjusted grayscale value of the second backlight area;

[0178] The control module is also used to control the brightness of the display area of ​​the display device based on the adjusted LOD compensation grayscale value and the adjusted second backlight area grayscale value; determine whether there is an area with uneven brightness in the displayed image, and if so, return to the step of determining whether there is a third area with uneven brightness in the displayed image until it is determined that there is no area with uneven brightness in the displayed image.

[0179] In one embodiment, the adjustment module is specifically used to:

[0180] If the brightness of the first pixel is greater than the brightness of the first target pixel, reducing the grayscale value of the backlight area corresponding to the first pixel;

[0181] If the brightness of the first pixel is lower than the brightness of the first target pixel, the grayscale value of the backlight area corresponding to the first pixel is increased.

[0182] An embodiment of the present application provides a display compensation method and a display compensation device, the method comprising: first acquiring a display image having a first uneven brightness area, then adjusting the compensation grayscale value corresponding to the first uneven brightness area based on an initial LOD compensation grayscale value to obtain an adjusted compensation grayscale value, using the adjusted compensation grayscale value to control the brightness of a display area of ​​a display device, and after determining that no uneven brightness area exists, sending the adjusted compensation grayscale value to a timing controller of the display device, the display device controlling the brightness of the display area based on the compensation grayscale value stored in the timing controller, wherein the compensation grayscale value comprises an LOD compensation grayscale value or a Demura compensation grayscale value. After determining that there is a first area of ​​uneven brightness in the displayed image, that is, determining that there is a watermark phenomenon, the compensation grayscale value corresponding to the first area of ​​uneven brightness is adjusted based on the initial LOD compensation grayscale value, and the brightness of the display area of ​​the display device is controlled using the adjusted compensation grayscale value. After determining that there is no area of ​​uneven brightness, the adjusted compensation grayscale value is sent to the timing controller of the display device. The display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller, so that when the display device displays an image, the watermark on the display screen is resolved and the display effect is improved.

[0183] The present application is described above with reference to the block diagrams and / or flow charts showing the methods, devices (systems) and / or computer program products according to the embodiments of the present application. It should be understood that a block of the block diagram and / or flow chart diagram and a combination of blocks of the block diagram and / or flow chart diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer and / or other programmable data processing device to produce a machine, so that the instructions executed by the computer processor and / or other programmable data processing device create a method for implementing the functions / actions specified in the block diagram and / or flow chart block.

[0184] Accordingly, the present application may also be implemented with hardware and / or software (including firmware, resident software, microcode, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium, for use by an instruction execution system or in conjunction with an instruction execution system. In the context of the present application, a computer-usable or computer-readable medium may be any medium that may contain, store, communicate, transmit, or convey a program for use by an instruction execution system, device, or apparatus, or in conjunction with an instruction execution system, device, or apparatus.

[0185] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A display compensation method, characterized in that: The method includes: Acquire a display image having a first uneven brightness area; Based on the initial compensation grayscale value, adjusting the compensation grayscale value corresponding to the pixel point in the first uneven brightness area to obtain an adjusted compensation grayscale value; The brightness of the display area of ​​the display device is controlled based on the adjusted compensation grayscale value. When it is determined that there is no area with uneven brightness in the displayed image, the adjusted compensation grayscale value is sent to the timing controller of the display device, and the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller.

2. The method according to claim 1, characterized in that The compensated grayscale value includes a first compensated grayscale value; after the brightness of the display area of ​​the display device is controlled based on the adjusted compensated grayscale value, the method further includes: Determining that a second uneven brightness area exists in the displayed image, wherein the compensated grayscale value further includes a second compensated grayscale value; Based on the initial compensation grayscale value, adjusting a second compensation grayscale value corresponding to a pixel point in the second uneven brightness area; controlling the brightness of a display area of ​​the display device based on the adjusted first compensated grayscale value and the adjusted second compensated grayscale value; Determine whether there is an uneven brightness region in the displayed image, and if so, return to the step of determining whether there is a second uneven brightness region in the displayed image until it is determined that there is no uneven brightness region in the displayed image; The adjusted first compensation grayscale value and the adjusted second compensation grayscale value are sent to a timing controller of the display device.

3. The method according to claim 2, characterized in that The adjusting, based on the initial compensation grayscale value, the second compensation grayscale value corresponding to the pixel point in the second uneven brightness area comprises: For each second pixel in the second uneven brightness area, determining whether the brightness of the second pixel is greater than the brightness of the second target pixel; If it is greater than, reducing the second compensated grayscale value corresponding to the second pixel by a preset multiple of the initial compensated grayscale value; If it is less than, increasing the second compensated grayscale value corresponding to the second pixel point by the preset multiple of the initial compensated grayscale value; The second target pixel point is adjacent to an edge pixel point of the second uneven brightness area.

4. The method according to any one of claims 1 to 3, characterized in that: The step of adjusting the compensation grayscale value corresponding to the pixel point in the first uneven brightness area based on the initial compensation grayscale value to obtain the adjusted compensation grayscale value includes: For each first pixel in the first uneven brightness area, determining whether the brightness of the first pixel is greater than the brightness of a first target pixel; If it is greater than, reducing the compensation grayscale value corresponding to the first pixel by a preset multiple of the initial compensation grayscale value; If it is less than, increasing the compensation grayscale value corresponding to the first pixel point by the preset multiple of the initial compensation grayscale value; The first target pixel point is adjacent to an edge pixel point of the first uneven brightness area.

5. The method according to claim 1, characterized in that Before controlling the brightness of the display area of ​​the display device based on the adjusted compensated grayscale value, the method further includes: Adjusting the grayscale value of the first backlight area corresponding to the first uneven brightness area to obtain an adjusted grayscale value of the first backlight area; The method of controlling the brightness of a display area of ​​a display device based on the adjusted compensation grayscale value, and sending the adjusted compensation grayscale value to a timing controller of the display device when it is determined that there is no uneven brightness area in the displayed image, comprises: Controlling the brightness of a display area of ​​the display device based on the adjusted compensated grayscale value and the adjusted grayscale value of the first backlight area; When it is determined that there is no uneven brightness area in the displayed image, the adjusted compensation grayscale value and the adjusted first backlight area grayscale value are sent to the timing controller of the display device.

6. The method according to claim 5, characterized in that After controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value and the adjusted first backlight area grayscale value, the method further includes: Determining that a third uneven brightness region exists in the displayed image; Adjusting the grayscale value of the second backlight area corresponding to the third uneven brightness area to obtain an adjusted grayscale value of the second backlight area; Controlling the brightness of a display area of ​​the display device based on the adjusted first compensation grayscale value and the adjusted second backlight area grayscale value; Determine whether there is a brightness uneven region in the displayed image, and if so, return to the step of determining whether there is a third brightness uneven region in the displayed image until it is determined that there is no brightness uneven region in the displayed image.

7. The method according to claim 5 or 6, characterized in that The step of adjusting the grayscale value of the first backlight area corresponding to the first uneven brightness area to obtain the adjusted grayscale value of the first backlight area includes: If the brightness of the first pixel is greater than the brightness of the first target pixel, reducing the grayscale value of the backlight area corresponding to the first pixel; If the brightness of the first pixel is lower than the brightness of the first target pixel, the grayscale value of the backlight area corresponding to the first pixel is increased.

8. A display compensation device, characterized in that: include: An acquisition module, used for acquiring a display image having a first uneven brightness area; An adjustment module, configured to adjust the compensation grayscale value corresponding to the pixel point in the first uneven brightness area based on the initial compensation grayscale value to obtain an adjusted compensation grayscale value; A control module is used to control the brightness of a display area of ​​a display device based on an adjusted compensation grayscale value. When it is determined that there is no area with uneven brightness in a displayed image, the control module sends the adjusted compensation grayscale value to a timing controller of the display device, and the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller.

9. The device according to claim 8, characterized in that Also included is a determination module; The compensated grayscale value includes a first compensated grayscale value; after the brightness of the display area of ​​the display device is controlled based on the adjusted compensated grayscale value: The determination module is used to determine whether a second uneven brightness area exists in the displayed image, wherein the compensation grayscale value further includes a second compensation grayscale value; The adjustment module is further configured to adjust a second compensation grayscale value corresponding to a pixel point in the second uneven brightness area based on the initial compensation grayscale value; The control module is also used to control the brightness of the display area of ​​the display device based on the adjusted first compensation grayscale value and the adjusted second compensation grayscale value; determine whether there is an uneven brightness area in the displayed image, and if so, return to the step of determining whether there is a second uneven brightness area in the displayed image until it is determined that there is no uneven brightness area in the displayed image; and send the adjusted first compensation grayscale value and the adjusted second compensation grayscale value to the timing controller of the display device.

10. The device according to claim 9, characterized in that The adjustment module is specifically used for: For each second pixel in the second uneven brightness area, determining whether the brightness of the second pixel is greater than the brightness of the second target pixel; If it is greater than, reducing the second compensated grayscale value corresponding to the second pixel by a preset multiple of the initial compensated grayscale value; If it is less than, increasing the second compensated grayscale value corresponding to the second pixel point by the preset multiple of the initial compensated grayscale value; The second target pixel point is adjacent to an edge pixel point of the second uneven brightness area.

11. The device according to any one of claims 8 to 10, characterized in that: The adjustment module is specifically used for: For each first pixel in the first uneven brightness area, determining whether the brightness of the first pixel is greater than the brightness of a first target pixel; If it is greater than, reducing the compensation grayscale value corresponding to the first pixel by a preset multiple of the initial compensation grayscale value; If it is less than, increasing the compensation grayscale value corresponding to the first pixel point by the preset multiple of the initial compensation grayscale value; The first target pixel point is adjacent to an edge pixel point of the first uneven brightness area.

12. The device according to claim 8, characterized in that Before controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value, the adjustment module is further used to: Adjusting the grayscale value of the backlight area corresponding to the first uneven brightness area to obtain an adjusted grayscale value of the backlight area; The control module is specifically used for: Controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value and the adjusted backlight area grayscale value; When it is determined that there is no uneven brightness area in the displayed image, the adjusted compensation grayscale value and the adjusted grayscale value of the backlight area are sent to the timing controller of the display device.

13. The device according to claim 12, characterized in that After controlling the brightness of the display area of ​​the display device based on the adjusted compensated grayscale value and the adjusted grayscale value of the backlight area: The determination module is further used to determine whether a third uneven brightness area exists in the displayed image; The adjustment module is further used to adjust the grayscale value of the second backlight area corresponding to the third uneven brightness area to obtain an adjusted grayscale value of the second backlight area; The control module is also used to control the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value and the adjusted second backlight area grayscale value; determine whether there is an uneven brightness area in the displayed image, and if so, return to the step of determining whether there is a third uneven brightness area in the displayed image until it is determined that there is no uneven brightness area in the displayed image.

14. The device according to claim 12 or 13, characterized in that The adjustment module is specifically used for: If the brightness of the first pixel is greater than the brightness of the first target pixel, reducing the grayscale value of the backlight area corresponding to the first pixel; If the brightness of the first pixel is lower than the brightness of the first target pixel, the grayscale value of the backlight area corresponding to the first pixel is increased.

Images