Display compensation method and display compensation device

Abstract

The present invention discloses a display compensation method and display compensation device. The method first acquires a display image having a first area of ​​uneven brightness. Then, based on an initial compensation grayscale value, the compensation grayscale value corresponding to the first area of ​​uneven brightness is adjusted. The brightness of the display area is controlled based on the adjusted compensation grayscale value. After determining that no area of ​​uneven brightness exists, the adjusted compensation grayscale value is sent to a timing controller of the display device. The brightness of the display area of ​​the display device is controlled using the adjusted compensation grayscale value. After determining that no area of ​​uneven brightness exists, 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. This eliminates watermarks on the display screen when the display device displays an image, improving the display quality.

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 large size, high refresh rate and high resolution. High refresh rate and high resolution require shorter pixel charging time, and the display may experience Mura (uneven brightness).

[0003] To address the pixel charging issue, the LOD (Line Over Driver) IP (Intellectual Property, a general term for integrated circuit cores with intellectual property cores) module is currently commonly used to provide LOD compensation grayscale values ​​to pixels for pixel charging compensation. To address the mura phenomenon, the demura (brightness uniformity) IP module is commonly 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 enabled at the same time, conflicts may occur, causing watermarks and affecting the display quality. 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 watermarks exist in display images and affect the display effect of liquid crystal display screens.

[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] 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;

[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 controlling the brightness of a display area of ​​the display device 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] Determining whether there is a brightness uneven area in the displayed image, and if so, returning to the step of determining whether there is a second brightness uneven area in the displayed image, until it is determined that there is no brightness uneven area 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 compensated grayscale value corresponding to the pixel point in the second uneven brightness area based on the initial compensated 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 point 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 the 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, before controlling the brightness of the display area of ​​the display device based on the adjusted compensated 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 no area with uneven brightness exists 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 grayscale value of the first backlight area 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 grayscale value of the first backlight area, the method further includes:

[0032] determining that a third uneven brightness area 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 compensation grayscale value and the adjusted second backlight area grayscale value;

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

[0036] In a possible implementation, 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, configured to acquire 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 the adjusted compensation grayscale value. When it is determined that there is no area with uneven brightness in the 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, the method further includes a determining module; the compensated grayscale value includes a first compensated grayscale value; and after the brightness of the display area of ​​the display device is controlled based on the adjusted compensated grayscale value:

[0044] The determination module is further configured to determine whether a second uneven brightness area exists in the displayed image, wherein the compensated grayscale value further includes a second compensated 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 further 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, the adjustment module is specifically configured 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 point 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, the adjustment module is specifically configured 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 the 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 the display area of ​​the display device based on the adjusted compensated 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 a 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 configured to determine whether a third uneven brightness area exists in the displayed image;

[0064] The adjustment module is further configured 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 further 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, the adjustment module is specifically configured 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 present application provides a display compensation method and display compensation device, the method comprising: first acquiring a display image having a first uneven brightness region, then adjusting the compensation grayscale value corresponding to the first uneven brightness region based on an initial compensation grayscale value to obtain an adjusted compensation grayscale value, controlling the brightness of a display region of a display device using the adjusted compensation grayscale value, and after determining that no uneven brightness region exists, sending the adjusted compensation grayscale value to a timing controller of the display device, and the display device controlling the brightness of the display region based on the compensation grayscale value stored in the timing controller. After determining that the first uneven brightness region exists in the displayed image, that is, determining that a watermark phenomenon exists, adjusting the compensation grayscale value corresponding to the first uneven brightness region based on the initial compensation grayscale value, controlling the brightness of the display region of the display device using the adjusted compensation grayscale value, and after determining that no uneven brightness region exists, sending the adjusted compensation grayscale value to the timing controller of the display device, and the display device controlling the brightness of the display region based on the compensation grayscale value stored in the timing controller, thereby resolving the watermark on the display screen when the display device displays an image and improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0072] Figure 1 A schematic diagram showing a mura area on a display screen 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 flowchart of another display compensation method provided in an embodiment of the present application;

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

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

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

[0080] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0081] like Figure 1 As shown in the figure, 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 pixels in the L32 area is equal to L64+L32, that is, L96. If 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, as shown in the figure. Figure 2 As shown in the figure, bright or dark areas appear at the edge of the original Mura area in the display image. This phenomenon is called watermarking.

[0082] In order to solve the watermark phenomenon and improve the display effect, the embodiments of the present application provide 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. 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, send 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.

[0087] In an embodiment of the present application, a display image having a first uneven brightness region is first acquired, and then, based on an initial compensation grayscale value, the compensation grayscale value corresponding to the first uneven brightness region is adjusted to obtain an adjusted compensation grayscale value. The adjusted compensation grayscale value is used to control the brightness of the display region of the display device. After determining that no uneven brightness region exists, the adjusted compensation grayscale value is sent to a timing controller of the display device. The display device controls the brightness of the display region based on the compensation grayscale value stored in the timing controller. Since it is determined that the first uneven brightness region exists in the display image, that is, it is determined that a watermark phenomenon exists, the compensation grayscale value corresponding to the first uneven brightness region is adjusted based on the initial compensation grayscale value. The brightness of the display region of the display device is controlled using the adjusted compensation grayscale value. After determining that no uneven brightness region exists, the adjusted compensation grayscale value is sent to the timing controller of the display device. The display device controls the brightness of the display region based on the compensation grayscale value stored in the timing controller, thereby resolving the watermark on the display screen when the display device displays an image and improving the display effect.

[0088] The display compensation method in the embodiment of the present application is executed during the production process of the display device. The execution entity can 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 whether the first uneven brightness area exists in the display image.

[0089] Specifically, a photograph of the display image is first taken. The display area of ​​the display device can be photographed using a demura device, and then the photographed image is analyzed to determine whether there is an area with uneven brightness in the photographed image, and the display image is processed for uneven brightness, such as demura processing. At the same time, LOD processing is performed on the display image, and then a photograph of the display area of ​​the display device is taken using a demura device, and then the photographed image is 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, analyzing the image obtained by the photograph, determining whether there is an area with uneven brightness in the image obtained by the photograph, and determining the coordinates of the area with uneven brightness when it is determined that there is an area with uneven brightness are all automatically performed by the machine, such as performing the above operations through a preset algorithm.

[0091] In the embodiment of the present application, the brightness of the display area is controlled by the display device 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 using 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 an 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. Below, taking the initial compensation grayscale value as the initial LOD compensation grayscale value as an example, the compensation grayscale value LOD compensation grayscale value and the compensation grayscale value Demura compensation grayscale value are respectively explained.

[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 obtained, 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 displays, 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 brightness of the display area of ​​the display device is controlled by using the adjusted LOD compensation grayscale value, 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, this 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 restrictions 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, then 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 some pixels of the display area are shown, and the pixels of 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 uneven brightness areas 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 uneven brightness area in the displayed image. If so, the Demura compensation grayscale value corresponding to the second pixel point in the second uneven brightness area is adjusted based on the initial LOD compensation grayscale value. Based on the adjusted LOD compensation grayscale value and the adjusted Demura compensation grayscale value, the brightness of the display area of ​​the display device is controlled, and the step of determining whether there is a second uneven brightness area in the displayed image is returned until there is no uneven brightness area in the displayed image. If there is no uneven brightness area 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, in the embodiment of the present application, the first uneven brightness region and the second uneven brightness region 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 the photographed image is analyzed to determine whether there is a first uneven brightness area in the displayed image;

[0106] If it is determined that a first uneven brightness area exists in the displayed image, a first pixel in the first uneven brightness area is determined, and for each first pixel in the first uneven brightness area, whether the brightness of the first pixel is greater than the brightness of the first target pixel is determined; if the brightness of the first pixel is greater than the brightness of the first target pixel, the initial LOD compensation grayscale value of the first pixel is reduced 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 a photo of the display area is taken to determine whether a second uneven brightness area exists in the current display image. If so, a second pixel in the second uneven brightness area is determined. For each second pixel in the second uneven brightness area, it is determined whether the brightness of the second pixel is greater than the brightness of the second target pixel. If so, the demura compensation grayscale value corresponding to the second pixel is reduced by 1 / 3 of the initial LOD compensation grayscale value. For example, if 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 is continuously adjusted until no uneven brightness area exists 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] The above is that when it is first confirmed that there is an uneven brightness area in the displayed image, after adjusting the LOD compensation grayscale value, if there is still an uneven brightness area in the displayed image, the Demura compensation grayscale value is adjusted. In another embodiment, when it is first confirmed that there is an uneven brightness area in the displayed image, after adjusting the LOD compensation grayscale value, the grayscale value of the backlight area corresponding to the uneven brightness area is adjusted. The embodiment of this application is described below.

[0113] After adjusting the LOD compensation grayscale value of the pixel point corresponding to the first brightness display uneven area, adjust the grayscale value of the first backlight area corresponding to the first brightness display uneven 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 brightness uneven 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 brightness uneven area based on the initial LOD compensation grayscale value until there is no brightness uneven 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 that 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 point in the first uneven brightness area is lower than the brightness of the target pixel point, 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 point in the first uneven brightness area is higher than the brightness of the target pixel point, 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 after adjusting the grayscale values ​​twice, there are still uneven display areas in the displayed image, it is necessary to continue adjusting. Specifically, after adjusting the grayscale values ​​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 whether a first uneven brightness area exists in the display image after Demura processing and LOD processing, and then the display image with the first uneven brightness area is obtained. 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. The brightness of the display area is controlled based on the adjusted Demura compensation grayscale value. If it is determined that no uneven brightness area exists 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 is working 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 point in the first uneven brightness area is lower than the brightness of the target pixel point, the current grayscale value of the first backlight area is increased by 1 / 3 times 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 point in the first uneven brightness area is higher than the brightness of the target pixel point, the current grayscale value of the first backlight area is reduced by 1 / 3 times 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 after adjusting the grayscale value twice, there is still an area with uneven brightness in the displayed image, 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. 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 of the initial LOD compensation grayscale value, or the current grayscale value of the second backlight area is increased by the 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 of the initial LOD compensation grayscale value, or the current grayscale value of the second backlight area is reduced by the preset grayscale value b.

[0125] For ease of understanding, this application is described below with reference to 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: Based on the initial LOD compensation grayscale value, adjust the LOD compensation grayscale value corresponding to the first uneven brightness area to obtain an adjusted LOD compensation grayscale value;

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

[0130] S504: Determine whether there is an uneven brightness area in the display image of the display device. If so, execute S505; otherwise, execute 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: Determine whether there is an uneven brightness area in the display image of the display device. If so, execute S505; otherwise, execute 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 : Send 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 whether there is an uneven brightness area in the display image after demura processing and LOD processing;

[0138] S602: Based on the initial LOD compensation grayscale value, adjust the LOD compensation grayscale value corresponding to the uneven brightness area 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: Control 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: Determine whether there is an uneven brightness area in the display image of the display device. If so, return to S603; otherwise, execute 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 whether 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: Control 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: Determine whether there is an uneven brightness area in the display image of the display device. If so, execute S703; otherwise, execute S706;

[0149] S706 : Send 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 the structure of a display compensation device provided in an embodiment of the present application, comprising:

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

[0154] An adjustment module 802 is configured 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. 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, the method further includes a determining module; the compensation grayscale value includes an LOD compensation grayscale value; and 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 configured 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 further 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 a brightness uneven area in the displayed image, and if so, return to the step of determining whether there is a second brightness uneven area in the displayed image until it is determined that there is no brightness uneven 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 configured 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 configured 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 the 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 compensated grayscale value, the adjustment module is further configured 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 a 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 determining module is further configured to determine whether a third uneven brightness area exists in the displayed image;

[0177] The adjustment module is further configured 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 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.

[0179] In one embodiment, the adjustment module is specifically configured 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, wherein the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller, wherein the compensation grayscale value includes 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, thereby solving the watermark on the display screen and improving the display effect when the display device displays the image.

[0183] The present application is described above with reference to block diagrams and / or flow charts illustrating methods, apparatus (systems) and / or computer program products according to embodiments of the present application. It should be understood that a block of a block diagram and / or flow chart, as well as a combination of blocks of a block diagram and / or flow chart, 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 such that 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 using 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 having computer-usable or computer-readable program code embodied in the medium for use by 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 can contain, store, communicate, transmit, or convey a program for use by or in conjunction with an instruction execution system, apparatus, or device.

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

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; 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 no area with uneven brightness exists in the displayed image, so that the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller; The compensated grayscale value includes a first compensated grayscale value, and controlling the brightness of a display area of ​​the display device based on the adjusted compensated grayscale value includes: controlling the brightness of a display area of ​​the display device based on the adjusted first compensated grayscale value; After controlling the brightness of the display area of ​​the display device based on the adjusted first compensated grayscale value, the method further includes: Determining that a second uneven brightness region exists in the displayed image, and adjusting a second compensated grayscale value corresponding to a pixel point in the second uneven brightness region based on the initial compensated grayscale value; 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; Determining whether there is a brightness uneven area in the displayed image, and if so, returning to the step of determining whether there is a second brightness uneven area in the displayed image, until it is determined that there is no brightness uneven area in the displayed image; sending the adjusted first compensation grayscale value and the adjusted second compensation grayscale value to a timing controller of the display device; The first compensation grayscale value is an LOD compensation grayscale value, and the second compensation grayscale value is a Demura compensation grayscale value.

2. The method according to claim 1, wherein 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 includes: 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 point 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.

3. The method according to claim 1 or 2, wherein: 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 the 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.

4. The method according to claim 1, wherein 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 no area with uneven brightness exists 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 grayscale value of the first backlight area are sent to the timing controller of the display device.

5. The method according to claim 4, wherein After controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value and the adjusted grayscale value of the first backlight area, the method further includes: determining that a third uneven brightness area 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 area in the displayed image. If so, return to the step of determining whether there is a third brightness uneven area in the displayed image until it is determined that there is no brightness uneven area in the displayed image.

6. The method according to claim 3, wherein 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: 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.

7. A display compensation device, characterized in that: include: An acquisition module, configured to acquire 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 configured to control the brightness of a display area of ​​a display device based on the adjusted compensation grayscale value, and, if it is determined that no area with uneven brightness exists in the displayed image, to send the adjusted compensation grayscale value to a timing controller of the display device, so that the display device controls the brightness of the display area based on the compensation grayscale value stored in the timing controller; The display device further includes a determination module; the compensated grayscale value includes a first compensated grayscale value; The determining module is configured to control the brightness of a display area of ​​the display device based on the adjusted first compensated grayscale value; After controlling the brightness of the display area of ​​the display device based on the adjusted compensation grayscale value, the determining module is further configured to determine whether a second uneven brightness area exists in the displayed image; 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 further configured 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 the second uneven brightness area exists in the displayed image until it is determined that no uneven brightness area exists in the displayed image; sending the adjusted first compensation grayscale value and the adjusted second compensation grayscale value to a timing controller of the display device; The first compensation grayscale value is an LOD compensation grayscale value, and the second compensation grayscale value is a Demura compensation grayscale value.

8. The device according to claim 7, 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 point 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.

9. The device according to claim 7 or 8, 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 the 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.

10. The device according to claim 7, wherein Before controlling the brightness of the display area of ​​the display device based on the adjusted compensated grayscale value, the adjustment module is further configured 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 a 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.

11. The device according to claim 10, 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 configured to determine whether a third uneven brightness area exists in the displayed image; The adjustment module is further configured 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 further 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.

12. The device according to claim 9, wherein 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