Display compensation method, apparatus and display device

Abstract

The application discloses a display compensation method, device and display equipment. The method comprises the following steps: acquiring the luminance uniformization compensation gray scale corresponding to each sub-pixel based on any preset gray scale; acquiring the overdrive threshold value corresponding to the second point pixel under the preset gray scale based on the first point pixel and the second point pixel located in adjacent two rows; if the difference between the first gray scale and the second gray scale is greater than or equal to the overdrive threshold value, starting the overdrive compensation for the second point pixel; and the overdrive threshold value is determined based on the luminance uniformization compensation gray scale corresponding to the first point pixel and the luminance uniformization compensation gray scale corresponding to the second point pixel. The adaptive threshold value is set to more accurately identify the light load and heavy load images. Since the overdrive threshold value can be adjusted according to the Demura result, the water mark phenomenon caused by the conflict between Demura and LOD can be effectively reduced under the premise of guaranteeing the Demura effect, and the display effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display control, in particular to a display compensation method and device and display equipment. BACKGROUND

[0002] With the progress of display technology, LCD (Liquid Crystal Display) has been increasingly widely applied in various fields. LCD mainly includes a liquid crystal panel and a driving circuit. In order to improve the display effect of the liquid crystal panel, when driving each pixel to emit light, based on each row of sub-pixels in each pixel, the driving circuit usually uses the LOD (Line Over Driver) technology to speed up the rotation speed of the liquid crystal molecules and shorten the response time.

[0003] However, since the LOD is performed after the display data is compensated by Demura (luminance uniformization), in some special cases, the display picture after Demura compensation will be converted from a light load picture to a heavy load picture, thereby causing the LOD compensation to start, and then some pixels may be over-compensated, resulting in a visual phenomenon similar to water marks on the display picture, and reducing the display effect. SUMMARY

[0004] Embodiments of the present application provide a display compensation method, device and display equipment to reduce the water mark phenomenon caused by the conflict between Demura and LOD and improve the display effect.

[0005] To solve the above technical problems, embodiments of the present application disclose the following technical solutions:

[0006] In a first aspect, a display compensation method is provided, applied to a display panel, the display panel comprising a plurality of sub-pixels arranged in an array, the method comprising:

[0007] Based on any predetermined gray scale in a full gray scale, obtaining a luminance uniformization compensation gray scale corresponding to each sub-pixel;

[0008] Based on a first point pixel and a second point pixel in any column of sub-pixels, obtaining an overdrive threshold value corresponding to the second point pixel at the predetermined gray scale, the first point pixel being a sub-pixel located in a row above the second point pixel, and the overdrive threshold value being determined based on a luminance uniformization compensation gray scale corresponding to the first point pixel and a luminance uniformization compensation gray scale corresponding to the second point pixel;

[0009] if the difference between the first gray scale and the second gray scale is greater than or equal to the overdrive threshold value, overdrive compensation is started for the second point pixel, the first gray scale is equal to the sum of the preset gray scale and the luminance uniformization compensation gray scale corresponding to the first point pixel, and the second gray scale is equal to the sum of the preset gray scale and the luminance uniformization compensation gray scale corresponding to the second point pixel.

[0010] In combination with the first aspect, the overdrive threshold value corresponding to the second point pixel at the preset gray scale is determined in the following manner:

[0011] The sum of the absolute value of the luminance uniformization compensation gray scale corresponding to the first point pixel and the absolute value of the luminance uniformization compensation gray scale corresponding to the second point pixel is determined as the overdrive threshold value corresponding to the second point pixel at the preset gray scale.

[0012] In combination with the first aspect, the overdrive threshold value corresponding to the second point pixel at the preset gray scale is determined in the following manner:

[0013] The sum of the absolute value of the luminance uniformization compensation gray scale corresponding to the first point pixel and the absolute value of the luminance uniformization compensation gray scale corresponding to the second point pixel is determined as the initial threshold value corresponding to the second point pixel at the preset gray scale.

[0014] Based on the first gray scale and the second gray scale, an overdrive gray scale of the second point pixel is obtained from an overdrive compensation table of the display panel.

[0015] A first luminance corresponding to the first point pixel when displaying the first gray scale is obtained, and a second luminance corresponding to the second point pixel when displaying the overdrive gray scale is obtained.

[0016] If the luminance difference between the first luminance and the second luminance satisfies a water mark range corresponding to a demand level of the display panel, the initial threshold value is determined as the overdrive threshold value corresponding to the second point pixel at the preset gray scale.

[0017] In combination with the first aspect, the method further comprises:

[0018] If the luminance difference exceeds the water mark range corresponding to the demand level of the display panel, based on a first target luminance corresponding to a target sub-pixel when displaying the first gray scale and a second target luminance corresponding to the target sub-pixel when displaying the second gray scale, an initial luminance threshold value corresponding to the initial threshold value is obtained, the target sub-pixel being a sub-pixel that first receives display data in the display panel.

[0019] Based on a threshold value adjustment coefficient, the initial luminance threshold value and the luminance difference, the initial luminance threshold value is adjusted to obtain an adjusted luminance threshold value.

[0020] determining a target gray scale corresponding to the adjusted luminance threshold;

[0021] determining the target gray scale as an overdrive threshold corresponding to the second point pixel at the preset gray scale.

[0022] With reference to the first aspect, the threshold adjustment coefficient includes a first adjustment coefficient and a second adjustment coefficient.

[0023] If the luminance difference value is greater than the upper limit value of the water mark range, the adjusting the initial luminance threshold based on the threshold adjustment coefficient, the initial luminance threshold and the luminance difference value to obtain an adjusted luminance threshold includes:

[0024] determining an adjustment increase based on the first adjustment coefficient, the initial luminance threshold and the luminance difference value;

[0025] increasing the initial luminance threshold based on the adjustment increase to obtain an intermediate luminance threshold, and the luminance difference value is less than or equal to the intermediate luminance threshold;

[0026] If the intermediate luminance threshold is greater than a preset upper limit threshold, the preset upper limit threshold is determined as the adjusted luminance threshold.

[0027] With reference to the first aspect, the determining an adjustment increase based on the first adjustment coefficient, the initial luminance threshold and the luminance difference value includes:

[0028] the adjustment increase is determined by the following formula:

[0029] ΔTh1(Lv)=a×(|ΔLv-Th_base(Lv)|)

[0030] wherein ΔTh1(Lv) is the adjustment increase, a is the first adjustment coefficient, a>0, ΔLv is the luminance difference value, and Th_base(Lv) is the initial luminance threshold.

[0031] With reference to the first aspect, if the luminance difference value is less than the lower limit value of the water mark range, the adjusting the initial luminance threshold based on the threshold adjustment coefficient, the initial luminance threshold and the luminance difference value to obtain an adjusted luminance threshold includes:

[0032] determining an adjustment decrease based on the second adjustment coefficient, the initial luminance threshold and the luminance difference value;

[0033] decreasing the initial luminance threshold based on the adjustment decrease to obtain an intermediate luminance threshold, and the luminance difference value is greater than or equal to the intermediate luminance threshold;

[0034] If the intermediate brightness threshold is less than the preset lower threshold, then the preset lower threshold is determined as the adjusted brightness threshold.

[0035] In conjunction with the first aspect, the overdrive compensation table is obtained in the following manner:

[0036] The display panel is divided into multiple display areas;

[0037] Based on any first test point pixel in the display area, and a second test point pixel located in the next row below the first test point pixel, control the first test point pixel to display full grayscale, and control the second test point pixel to display the preset grayscale, and obtain the current brightness of each of the second test point pixels respectively;

[0038] Based on the deviation between each current brightness and the target brightness under the preset grayscale, when the first test point pixel displays the full grayscale, obtain each overdrive grayscale corresponding to the second test point pixel displaying the preset grayscale;

[0039] Based on the overdrive gray levels corresponding to different preset gray levels displayed by the second test point pixels, an overdrive compensation table for the display area is generated to perform overdrive compensation on the pixels of any two adjacent rows in the display area.

[0040] Secondly, a display compensation device is provided for use in a display panel, the display panel comprising an array of sub-pixels, the device comprising:

[0041] The brightness uniformity compensation module is used to obtain the brightness uniformity compensation gray level corresponding to each sub-pixel based on any preset gray level in the full gray level.

[0042] The overdrive threshold calling module is used to obtain the overdrive threshold corresponding to the second point pixel under the preset gray level based on the first point pixel and the second point pixel in any column of sub-pixels. The first point pixel is a sub-pixel located in the row above the second point pixel. The overdrive threshold is determined based on the brightness uniformity compensation gray level corresponding to the first point pixel and the brightness uniformity compensation gray level corresponding to the second point pixel.

[0043] The overdrive compensation module is used to initiate overdrive compensation for the second pixel if the difference between the first gray level and the second gray level is greater than or equal to the overdrive threshold. The first gray level is the sum of the brightness uniformity compensation gray level corresponding to the first pixel and the preset gray level, and the second gray level is the sum of the brightness uniformity compensation gray level corresponding to the second pixel and the preset gray level.

[0044] In a third aspect, a display device is provided, which comprises a display panel and a processor. The processor performs the display compensation method according to any one of the first aspect, or the processor uses the display compensation device according to any one of the second aspect to perform luminance compensation on the display panel.

[0045] One of the above technical solutions has the following advantages or beneficial effects:

[0046] Compared with the prior art, the display compensation method provided by the application comprises: obtaining a luminance uniformization compensation gray scale corresponding to each sub-pixel based on any preset gray scale in a full gray scale; obtaining a second point position pixel corresponding to an overdrive threshold value at a preset gray scale based on a first point position pixel and the second point position pixel located at adjacent two rows in any one column of sub-pixels; and if a difference between the first gray scale and the second gray scale is greater than or equal to the overdrive threshold value, starting overdrive compensation for the second point position pixel, wherein the overdrive threshold value is determined based on a luminance uniformization compensation gray scale corresponding to the first point position pixel and a luminance uniformization compensation gray scale corresponding to the second point position pixel. The display compensation method provided by the application can more accurately identify light load and heavy load images by setting an adaptive threshold value. If a gray scale difference between a current row and a previous row is less than the overdrive threshold value, the current row is determined as a light load, so that row overpressure driving is not started. Since the overdrive threshold value is determined based on a Demura compensation value and can be adjusted according to a Demura result, the water mark phenomenon caused by the conflict between Demura and LOD can be effectively reduced on the premise of ensuring the Demura effect, and the display effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0048] Figure 1 An example relationship diagram of output data and input data of point position 1 pixel and point position 2 pixel when the display panel displays a pure gray scale picture after starting Demura compensation is provided.

[0049] Figure 2 A schematic diagram of the overall flow of the display compensation method of the embodiments of the application is provided.

[0050] Figure 3 A schematic diagram of one determination method of the overdrive threshold value corresponding to the second point position pixel at a preset gray scale in the embodiments of the application is provided.

[0051] Figure 4A structural schematic diagram of a display compensation device according to an embodiment of the present application;

[0052] Figure 5 A structural schematic diagram of a display device according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the accompanying drawings in the embodiments of the present application. In the description of the present application, it should be understood that the terms "center", "vertical", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0054] In the present application, "De-" in Demura means removal, and Demura refers to removing mura, that is, performing brightness uniformity compensation.

[0055] Please refer to Figure 1 , Figure 1Fig. 1 shows an example relationship between the input data and the output data of the point 1 pixel and the point 2 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned on. The display panel can include a plurality of sub-pixels arranged in an array, and each column of sub-pixels is connected to the same data line. The point 2 pixel is a sub-pixel in the current row of any two adjacent rows of sub-pixels in the same column, and the point 1 pixel is a sub-pixel in the same column as the point 2 pixel and in the previous row of the point 2 pixel. Curve A shows an example relationship between the input data and the output data of the point 1 pixel and the point 2 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned off (i.e., in the Demura OFF state). It can be understood that, after the Demura compensation is turned off, the input data and the output data of the point 1 pixel and the point 2 pixel are the same, and the point 2 pixel is in a light load state, so the LOD compensation is not started. Curve B shows an example relationship between the input data and the output data of the point 1 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned on (i.e., in the Demura ON state), and curve C shows an example relationship between the input data and the output data of the point 2 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned on (i.e., in the Demura ON state). After the Demura compensation is turned on, because the mura states of the point 1 pixel and the point 2 pixel are inconsistent, the output data is not equal after the Demura. If the output data at this time is used as the input data of the LOD, because the gray scales of the point 1 pixel and the point 2 pixel are not equal at this time, the point 2 pixel is in a heavy load state, so the LOD compensation is started. It can be understood that, because the luminance difference between the point 1 pixel and the point 2 pixel after the Demura is small, the LOD compensation is started, which causes a large luminance difference between the point 1 pixel and the point 2 pixel (e.g., the arrow d in the middle of the figure), thereby causing the point 2 pixel to have water marks due to excessive compensation, and reducing the display effect. Figure 1

[0056] Therefore, embodiments of the present application provide a display compensation method applied to a display panel. The method sets an adaptive threshold based on Demura compensation values of two adjacent rows of sub-pixels, so as to more accurately identify light load and heavy load images. On the premise of ensuring the Demura effect, the method detects and adjusts the conflict between the Demura and the LOD, so as to effectively reduce the generation of picture water marks, and realizes the high-quality display effect of the LCD display, thereby solving at least part of the above technical problems.

[0057] Please refer to Figure 2 , Figure 2 Fig. 1 shows an example relationship between the input data and the output data of the point 1 pixel and the point 2 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned on. The display panel can include a plurality of sub-pixels arranged in an array, and each column of sub-pixels is connected to the same data line. The point 2 pixel is a sub-pixel in the current row of any two adjacent rows of sub-pixels in the same column, and the point 1 pixel is a sub-pixel in the same column as the point 2 pixel and in the previous row of the point 2 pixel. Curve A shows an example relationship between the input data and the output data of the point 1 pixel and the point 2 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned off (i.e., in the Demura OFF state). It can be understood that, after the Demura compensation is turned off, the input data and the output data of the point 1 pixel and the point 2 pixel are the same, and the point 2 pixel is in a light load state, so the LOD compensation is not started. Curve B shows an example relationship between the input data and the output data of the point 1 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned on (i.e., in the Demura ON state), and curve C shows an example relationship between the input data and the output data of the point 2 pixel after the display panel displays a pure gray scale picture and the Demura compensation is turned on (i.e., in the Demura ON state). After the Demura compensation is turned on, because the mura states of the point 1 pixel and the point 2 pixel are inconsistent, the output data is not equal after the Demura. If the output data at this time is used as the input data of the LOD, because the gray scales of the point 1 pixel and the point 2 pixel are not equal at this time, the point 2 pixel is in a heavy load state, so the LOD compensation is started. It can be understood that, because the luminance difference between the point 1 pixel and the point 2 pixel after the Demura is small, the LOD compensation is started, which causes a large luminance difference between the point 1 pixel and the point 2 pixel (e.g., the arrow d in the middle of the figure), thereby causing the point 2 pixel to have water marks due to excessive compensation, and reducing the display effect.

[0058] ​Step 201: obtaining a brightness uniformity compensation gray scale corresponding to each sub-pixel based on any preset gray scale in full gray scales.

[0059] The brightness uniformity compensation gray scale is also referred to as a Demura compensation gray scale. The full gray scales are determined according to the gray scale levels of the display panel, for example, the full gray scales can represent 0 gray scale to 255 gray scale.

[0060] In some embodiments, the display area of the liquid crystal display panel can be photographed first to obtain an LCD picture, and then the LCD picture is divided into N compensation areas, the display brightness of each compensation area is compared with the brightness of the center area, and the Demura compensation gray scale of the compensation area is calculated by weighting based on the display brightness of the center area and the display brightness of the compensation area. The Demura compensation gray scale of each sub-pixel in the compensation area can be set to the Demura compensation gray scale of the compensation area. Specifically, the Demura compensation gray scale of the compensation area can be determined by the following formula (1):

[0061]

[0062] In formula (1), AW is the Demura compensation gray scale of the compensation area, W is the target data of the compensation area, center represents the display gray scale corresponding to the brightness of the center area of the display panel, other represents the display gray scale corresponding to the brightness of the compensation area, and n represents the brightness weight of the center area.

[0063] For example, for an LCD display with a resolution of 3840x2160, it is divided into 480x270 areas in units of 8x8 pixels. The brightness and chrominance values of each area are obtained using a camera, and the coordinate information of each area is recorded. Correction terms are generated by related Demura technology, which can be used to eliminate the brightness and chrominance unevenness on the panel.

[0064] It should be noted that in the embodiments of the present application, the Demura compensation gray scale corresponding to each sub-pixel can be obtained only based on the binding point gray scale, and the Demura compensation gray scale corresponding to other gray scales other than the binding point gray scale can be determined by the bilinear interpolation method in related technology, which will not be described here.

[0065] Step 202: obtaining a second point pixel corresponding to an overdrive threshold value at a preset gray scale based on a first point pixel and a second point pixel in any column of sub-pixels, wherein the first point pixel is a sub-pixel located in the row above the second point pixel, and the overdrive threshold value is determined based on the brightness uniformity compensation gray scale corresponding to the first point pixel and the brightness uniformity compensation gray scale corresponding to the second point pixel.

[0066] Referring to Figure 3 , Figure 3 A method for determining the overdrive threshold value corresponding to the second point pixel at the preset gray scale is illustrated in the embodiments of the present application. In some embodiments, the overdrive threshold value corresponding to the second point pixel at the preset gray scale can be determined in the following manner:

[0067] The absolute value of the luminance-uniformity compensation gray scale Th1 corresponding to the first point pixel and the absolute value of the luminance-uniformity compensation gray scale Th2 corresponding to the second point pixel are summed to determine the overdrive threshold value Th_base corresponding to the second point pixel at the preset gray scale.

[0068] Specifically, the Demura compensation curves of the full gray scales of the point 1 pixel and the point 2 pixel are shown in curves D and E, respectively. At the bind point 1 gray scale, the point 1 pixel and the point 2 pixel are compensated by Th1 and Th2 gray scales, respectively. Therefore, the threshold value Th_base corresponding to the bind point 1 gray scale can be set as (|Th1|+|Th2|).

[0069] In the above manner, the overdrive threshold value can be determined according to the sum of the Demura degrees of the two rows of sub-pixels, and the threshold value range can be adjusted according to the Demura degree. Under the premise of guaranteeing the Demura effect, the core row driving circuit can better perform the LOD operation, and effectively reduce the water mark phenomenon caused by the conflict between Demura and LOD.

[0070] In other embodiments, the overdrive threshold value corresponding to the second point pixel at the preset gray scale can be determined in the following steps:

[0071] Step one, the absolute value of the luminance-uniformity compensation gray scale corresponding to the first point pixel and the absolute value of the luminance-uniformity compensation gray scale corresponding to the second point pixel are summed to determine the initial threshold value of the second point pixel at the preset gray scale.

[0072] Specifically, if at the bind point 1 gray scale, the point 1 pixel and the point 2 pixel are compensated by +3 and -3 gray scales, respectively, the initial threshold value Th_base0 corresponding to the bind point 1 gray scale can be set as (|Th1|+|Th2|)=6 gray scales.

[0073] Step two, based on the first gray scale and the second gray scale, the overdrive gray scale of the second point pixel is obtained from the overdrive compensation table of the display panel.

[0074] The first gray scale is the sum of the brightness homogenization compensation gray scale corresponding to the first point pixel and the preset gray scale, and the second gray scale is the sum of the brightness homogenization compensation gray scale corresponding to the second point pixel and the preset gray scale. Exemplarily, the preset gray scale is 50, the Demura compensation gray scale corresponding to the first point pixel is +3, and the Demura compensation gray scale corresponding to the second point pixel is -3, so the first gray scale is 53 and the second gray scale is 47.

[0075] In some examples, the overdrive compensation table (i.e., the LOD compensation table) of the display panel can be obtained by the following steps:

[0076] Firstly, the display panel is divided into a plurality of display regions.

[0077] Secondly, based on any first test point pixel in the display region and a second test point pixel located in the next row of the first test point pixel, the first test point pixel is controlled to display full gray scales, and the second test point pixel is controlled to display a preset gray scale, and the current brightness of the second test point pixel is obtained respectively.

[0078] Exemplarily, the preset gray scale is 50, so the second test point pixel is controlled to display 50 gray scales, and the first test point pixel is controlled to display 0 gray scales to 255 gray scales in turn. In the case that the first test point pixel displays different gray scales, the actual current brightness of the second test point pixel is measured respectively. In the measurement, the way of the luminance meter in the related art can be adopted, i.e., the probe of the luminance meter is arranged at the second test point pixel for measurement, which is not limited in detail.

[0079] It should be noted that, in the process of obtaining the LOD compensation table, in order to avoid the influence of the sub-pixels in the next row of the second test point pixel on the brightness of the second test point pixel, the sub-pixels in the next row of the second test point pixel can also be controlled to display the preset gray scale.

[0080] It can be understood that the first test point pixel and the second test point pixel can be sub-pixels located in any column in the display region, and the sub-pixels in the entire display region can share one LOD compensation table. Exemplarily, the first test point pixel can be a red sub-pixel, and the second test point pixel can be a green sub-pixel.

[0081] Thirdly, based on the deviation of the current brightness from the target brightness under the preset gray scale, the overdrive gray scale corresponding to the second test point pixel displaying the preset gray scale is obtained in the case that the first test point pixel displays full gray scales.

[0082] Exemplarily, taking that the first test point pixel displays 25 gray scales and the second test point pixel displays 50 gray scales as an example, if the current luminance of the second test point pixel is 15 nit (nit) and the target luminance of 50 gray scales is 20 nit, then the second test point pixel is undercharged, the display gray scale of the second test point pixel is gradually increased, and the luminance of the second test point pixel is measured in real time, when the luminance of the second test point pixel reaches 20 nit, the display gray scale at this time, for example, 54 gray scales, is determined as the overdrive gray scale corresponding to the case that the second test point pixel displays 50 gray scales under the condition that the first test point pixel displays 25 gray scales. That is to say, under the condition that the first test point pixel displays 25 gray scales, 4 gray scales are compensated on the basis of 50 gray scales for the second test point pixel, that is, 54 gray scales are input to the second test point pixel, so that the second test point pixel reaches the target luminance of 50 gray scales as soon as possible.

[0083] In some examples, a light load image of a preset gray scale, for example, a light load image of 50 gray scales, can be displayed by controlling the display area, and then the luminance of the center point of the display area at this time is determined as the target luminance under the preset gray scale, which is not limited in detail.

[0084] Fourthly, based on the overdrive gray scales corresponding to the different preset gray scales displayed by the second test point pixel, an overdrive compensation table of the display area is generated to perform overdrive compensation on the point pixels of any two adjacent rows in the display area.

[0085] It can be understood that when the second test point pixel displays different preset gray scales, the gray scale displayed by the first test point pixel is still changed by using the above method, and the current luminance of the second test point pixel is measured, and finally the overdrive gray scales corresponding to each gray scale of the full gray scale of the first test point pixel and the second test point pixel can be obtained, which are used as the overdrive compensation table used by the entire display area.

[0086] It should be noted that in the embodiments of the present application, when the overdrive compensation table is obtained, the adjustment and measurement can be based only on the bind point gray scale, and the overdrive gray scales corresponding to other gray scales other than the bind point gray scale can be determined by using the bilinear interpolation method in related technologies, which will not be described here.

[0087] Step three, obtaining the first luminance corresponding to the first gray scale displayed by the first point pixel, and obtaining the second luminance corresponding to the overdrive gray scale displayed by the second point pixel.

[0088] Specifically, the luminance meter can be used to obtain the first luminance and the second luminance.

[0089] Exemplarily, the preset gray scale is 50, the Demura compensation gray scale corresponding to the first point pixel is +3, and the Demura compensation gray scale corresponding to the second point pixel is -3, so that based on the first gray scale being 53 and the second gray scale being 47, the overdrive gray scale at this time is found to be 43 from the LOD compensation table. Then the first point pixel is controlled to display 53 gray scale, and the second point pixel is controlled to display 43 gray scale, and the corresponding first luminance and second luminance are measured respectively.

[0090] Step four, if the luminance difference between the first luminance and the second luminance meets the water mark range corresponding to the demand level of the display panel, the initial threshold value is determined as the overdrive threshold value of the second point pixel corresponding to the preset gray scale.

[0091] Specifically, the water mark range corresponding to the demand level of the display panel refers to that the luminance difference between the normal area and the water mark area of the display panel meets the luminance difference range corresponding to the demand level. The upper limit value of the water mark range refers to the larger value of the two endpoints of the luminance difference range, and the lower limit value of the water mark range refers to the smaller value of the two endpoints of the luminance difference range.

[0092] Exemplarily, when the luminance difference between the normal area and the water mark area of the display panel is less than or equal to 1 nit, the level of the display panel is A level; when the luminance difference between the normal area and the water mark area of the display panel is greater than 1 nit and less than or equal to 3 nit, the level of the display panel is B level; when the luminance difference between the normal area and the water mark area of the display panel is greater than 3 nit and less than or equal to 5 nit, the level of the display panel is C level; and when the luminance difference between the normal area and the water mark area of the display panel is greater than 5 nit and less than or equal to 10 nit, the level of the display panel is D level.

[0093] Taking the demand level of the display panel being C level as an example, if the point 1 pixel and the point 2 pixel respectively have +3 and -3 gray scale compensation at 50 gray scale, the initial threshold value corresponding to 50 gray scale is 6 gray scales. If the luminance difference between the first luminance and the second luminance is 5 nit, which meets the water mark range corresponding to the C level display panel, 6 is determined as the overdrive threshold value of the second point pixel corresponding to 50 gray scale. That is, at this time, the LOD is enabled, and the water mark still meets the requirements after the LOD compensation of the second point pixel.

[0094] In addition, in some examples, after step three is performed, the following step can also be continued to be performed, wherein step five can be executed in parallel with step four:

[0095] Step five, if the luminance difference exceeds the water mark range corresponding to the requirement level of the display panel, an initial luminance threshold corresponding to an initial threshold value is obtained based on a first target luminance corresponding to the first gray scale displayed by the target sub-pixel and a second target luminance corresponding to the second gray scale displayed by the target sub-pixel, wherein the target sub-pixel is a sub-pixel of the display panel that first receives display data.

[0096] That is, the target sub-pixel is determined from the sub-pixels of the display panel that are more saturated in charging.

[0097] Exemplarily, taking the requirement level of the display panel as the C level as an example, if the point 1 pixel and the point 2 pixel respectively have a compensation of +3 and -3 gray scales at 50 gray scales, the initial threshold value corresponding to 50 gray scales is 6 gray scales. The target sub-pixel is controlled to display 53 gray scales and a first target luminance is obtained, and then the target sub-pixel is controlled to display 47 gray scales and a second target luminance is obtained. At this time, the difference between the first target luminance and the second target luminance is the initial luminance threshold value.

[0098] Step six, the initial luminance threshold value is adjusted based on the threshold adjustment coefficient, the initial luminance threshold value and the luminance difference to obtain an adjusted luminance threshold value.

[0099] In some examples, the threshold adjustment coefficient can include a first adjustment coefficient and a second adjustment coefficient. If the luminance difference is greater than the upper limit value of the water mark range, step six can be performed in the following manner:

[0100] First step, based on the first adjustment coefficient, the initial luminance threshold value and the luminance difference, an adjustment increase is determined.

[0101] Specifically, the adjustment increase can be determined by the following formula (2):

[0102] ΔTh1(Lv)=a×(|ΔLv-Th_base(Lv)|)(2)

[0103] In formula (2), ΔTh1(Lv) is the adjustment increase, a is the first adjustment coefficient, a>0, ΔLv is the luminance difference, and Th_base(Lv) is the initial luminance threshold value. It should be noted that if fast adjustment is required, a can be set to be larger, and if fine adjustment is required, a can be set to be smaller. The specific value can be set according to the specific application requirement.

[0104] Second step, the initial luminance threshold value is increased based on the adjustment increase to obtain an intermediate luminance threshold value, wherein the luminance difference is less than or equal to the intermediate luminance threshold value.

[0105] That is, the initial luminance threshold value is increased by using the adjustment increase until the luminance difference is less than or equal to the intermediate luminance threshold value, and the adjustment is ended.

[0106] Specifically, the intermediate luminance threshold value = the initial luminance threshold value + m x the adjustment increase, m is the adjustment number.

[0107] Thirdly, if the intermediate luminance threshold value is greater than the preset upper threshold value, the preset upper threshold value is determined as the adjusted luminance threshold value. In addition, if the intermediate luminance threshold value is less than or equal to the preset upper threshold value, the intermediate luminance threshold value is determined as the adjusted luminance threshold value.

[0108] In other examples, if the luminance difference value is less than the lower limit value of the water mark range, step six can be performed in the following way:

[0109] Firstly, based on the second adjustment coefficient, the initial luminance threshold value and the luminance difference value, an adjustment decrease is determined.

[0110] Specifically, the adjustment increase can be determined by the following formula (3):

[0111] ΔTh2(Lv) = b x (|ΔLv - Th_base(Lv)|) (3)

[0112] In formula (3), ΔTh2(Lv) is the adjustment decrease, b is the second adjustment coefficient, b > 0, ΔLv is the luminance difference value, and Th_base(Lv) is the initial luminance threshold value. It should be noted that if fast adjustment is required, b can be set to be larger, and if fine adjustment is required, b can be set to be smaller. Specifically, b and a can be set according to the specific application requirement, and b and a can be the same or different.

[0113] Secondly, the initial luminance threshold value is decreased based on the adjustment decrease to obtain an intermediate luminance threshold value, wherein the luminance difference value is greater than or equal to the intermediate luminance threshold value.

[0114] That is, the initial luminance threshold value is decreased by using the adjustment decrease until the luminance difference value is greater than or equal to the intermediate luminance threshold value, and the adjustment is ended.

[0115] Specifically, the intermediate luminance threshold value = the initial luminance threshold value - n x the adjustment increase, n is the adjustment number.

[0116] Thirdly, if the intermediate luminance threshold value is less than the preset lower threshold value, the preset lower threshold value is determined as the adjusted luminance threshold value. In addition, if the intermediate luminance threshold value is greater than or equal to the preset lower threshold value, the intermediate luminance threshold value is determined as the adjusted luminance threshold value.

[0117] Through the above examples, it can be ensured that the adaptive compensation threshold Th base can be dynamically adjusted within a reasonable range, for example, for high-level displays, a larger threshold can be selected; for low-level displays, a smaller threshold can be used; in scenes with large light and dark changes, the threshold range can also be increased to keep the brightness and contrast of the picture stable, thus minimizing errors and water marks, and effectively avoiding the conflict between Demura effect and LOD.

[0118] Step seven, determining the target gray scale corresponding to the adjusted brightness threshold.

[0119] Specifically, the target gray scale corresponding to the adjusted brightness threshold is determined based on the gray scale brightness curve of the display panel.

[0120] Exemplarily, taking a C-level display panel as an example, if the first point pixel and the second point pixel respectively have +3 and -3 gray scale compensations at 50 gray scale, the initial threshold at 50 gray scale is 6 gray scales, and the initial brightness threshold at this time is assumed to be 5 nit. If the brightness difference between the first brightness and the second brightness is 6 nit, which is greater than the upper limit value (5 nit) of the water mark range of the C-level display panel, the initial threshold 6 needs to be adaptively adjusted. Assuming that the adjusted brightness threshold is 5.2 nit, find G gray scale from 53 gray scale towards a direction smaller than 53 gray scale from the gray scale brightness curve, so that the difference between the brightness corresponding to 53 gray scale and the brightness corresponding to G gray scale is 5.2 nit, and assuming that G gray scale is 45 gray scale, the target gray scale corresponding to the adjusted brightness threshold (5.2 nit) is (53-45) = 8 gray scale.

[0121] It can be understood that if the gray scale of the second point pixel after Demura compensation is greater than the gray scale of the first point pixel, when finding the target gray scale corresponding to the adjusted brightness threshold, the gray scale of the first point pixel should be taken as the reference, and G gray scale should be found in a direction greater than 53 gray scale, which will not be described separately here.

[0122] Step eight, determining the target gray scale as the overdrive threshold corresponding to the second point pixel at the preset gray scale.

[0123] By the above manner, when the luminance difference between the first luminance and the second luminance exceeds the upper limit of the water mark range, the overdrive threshold value can be increased to make the second point pixel not start the LOD compensation, and then the luminance difference between the first luminance and the second luminance can be reduced to be promoted from a lower level to a level meeting the requirements; when the luminance difference between the first luminance and the second luminance exceeds the lower limit of the water mark range, the overdrive threshold value can be reduced to make the second point pixel start the LOD compensation early, and then the luminance difference between the first luminance and the second luminance can be increased to be reduced from a higher level to a level meeting the requirements, so that the threshold value can be dynamically adjusted according to the water mark effect, the overdrive threshold value can be dynamically adjusted within a reasonable range, the conflict between the Demura effect and the LOD can be effectively avoided, the gray value of each row of sub-pixels can be adjusted to be optimal, the error and the water mark can be minimized, and the actual level requirement of the display panel can be better met.

[0124] Step 203: If the difference between the first gray scale and the second gray scale is greater than or equal to the overdrive threshold value, overdrive compensation is started for the second point pixel.

[0125] Specifically, the overdrive compensation manner in the related art can be used, for example, the overdrive gray scale at this time is searched from the LOD compensation table, and the second point pixel is driven to display by using the overdrive voltage corresponding to the overdrive gray scale, which is not described here in detail.

[0126] It can be understood that the display compensation method provided in the application can more accurately identify light load and heavy load images by setting an adaptive threshold value, if the gray scale difference between the current row and the previous row is less than the overdrive threshold value, the current row is judged as light load, and the row overdrive is not started, since the overdrive threshold value is determined based on the Demura compensation value and can be adjusted according to the Demura result, the water mark phenomenon caused by the conflict between the Demura and the LOD can be effectively reduced and the display effect can be improved on the premise of guaranteeing the Demura effect.

[0127] Correspondingly, please refer to Figure 4 , Figure 4 The structural diagram of the display compensation device of the embodiment of the application is shown. The display compensation device provided in the embodiment of the application is applied to a display panel, and the device specifically includes a luminance uniformization compensation module 401, an overdrive threshold value calling module 402 and an overdrive compensation module 403.

[0128] The luminance uniformization compensation module 401 is used to acquire the luminance uniformization compensation gray scale corresponding to each sub-pixel based on any preset gray scale in the full gray scale.

[0129] The overdrive threshold calling module 402 is configured to acquire, based on a first point pixel and a second point pixel in any one column of sub-pixels, an overdrive threshold corresponding to the second point pixel at a preset gray scale, the first point pixel being a sub-pixel located in a row above the second point pixel, and the overdrive threshold being determined based on a luminance uniformization compensation gray scale corresponding to the first point pixel and a luminance uniformization compensation gray scale corresponding to the second point pixel.

[0130] The overdrive compensation module 403 is configured to start overdrive compensation for the second point pixel if a difference between a first gray scale and a second gray scale is greater than or equal to the overdrive threshold, the first gray scale being equal to a sum of the luminance uniformization compensation gray scale corresponding to the first point pixel and the preset gray scale, and the second gray scale being equal to a sum of the luminance uniformization compensation gray scale corresponding to the second point pixel and the preset gray scale.

[0131] In some embodiments, the overdrive threshold corresponding to the second point pixel at the preset gray scale is determined in the following manner:

[0132] A sum of an absolute value of the luminance uniformization compensation gray scale corresponding to the first point pixel and an absolute value of the luminance uniformization compensation gray scale corresponding to the second point pixel is determined as the overdrive threshold corresponding to the second point pixel at the preset gray scale.

[0133] In some embodiments, the overdrive threshold corresponding to the second point pixel at the preset gray scale is determined in the following manner:

[0134] A sum of an absolute value of the luminance uniformization compensation gray scale corresponding to the first point pixel and an absolute value of the luminance uniformization compensation gray scale corresponding to the second point pixel is determined as an initial threshold corresponding to the second point pixel at the preset gray scale.

[0135] Based on the first gray scale and the second gray scale, an overdrive gray scale of the second point pixel is acquired from an overdrive compensation table of the display panel.

[0136] A first luminance corresponding to the first point pixel when displaying the first gray scale is acquired, and a second luminance corresponding to the second point pixel when displaying the overdrive gray scale is acquired.

[0137] If a luminance difference between the first luminance and the second luminance satisfies a water mark range corresponding to a requirement level of the display panel, the initial threshold is determined as the overdrive threshold corresponding to the second point pixel at the preset gray scale.

[0138] In some embodiments, the overdrive threshold corresponding to the second point pixel at the preset gray scale is also determined in the following manner:

[0139] If the luminance difference exceeds the water mark range corresponding to the requirement level of the display panel, an initial luminance threshold corresponding to an initial threshold value is obtained based on a first target luminance corresponding to the first gray scale displayed by the target sub-pixel and a second target luminance corresponding to the second gray scale displayed by the target sub-pixel, the target sub-pixel being a sub-pixel that first receives display data in the display panel.

[0140] The initial luminance threshold is adjusted based on the threshold adjustment coefficient, the initial luminance threshold, and the luminance difference to obtain an adjusted luminance threshold.

[0141] A target gray scale corresponding to the adjusted luminance threshold is determined.

[0142] The target gray scale is determined as an overdrive threshold corresponding to the preset gray scale of the second point pixel.

[0143] In some embodiments, the threshold adjustment coefficient includes a first adjustment coefficient and a second adjustment coefficient.

[0144] If the luminance difference is greater than the upper limit value of the water mark range, the initial luminance threshold is adjusted based on the threshold adjustment coefficient, the initial luminance threshold, and the luminance difference to obtain an adjusted luminance threshold, including:

[0145] A first adjustment amount is determined based on the first adjustment coefficient, the initial luminance threshold, and the luminance difference.

[0146] The initial luminance threshold is increased based on the first adjustment amount to obtain an intermediate luminance threshold, and the luminance difference is less than or equal to the intermediate luminance threshold.

[0147] If the intermediate luminance threshold is greater than a preset upper limit threshold, the preset upper limit threshold is determined as the adjusted luminance threshold.

[0148] In some embodiments, the first adjustment amount is determined based on the first adjustment coefficient, the initial luminance threshold, and the luminance difference, including:

[0149] The first adjustment amount is determined by the following formula:

[0150] ΔTh1(Lv)=a×(|ΔLv-Th_base(Lv)|)

[0151] wherein ΔTh1(Lv) is the first adjustment amount, a is the first adjustment coefficient, a>0, ΔLv is the luminance difference, and Th_base(Lv) is the initial luminance threshold.

[0152] In some embodiments, if the luminance difference is less than the lower limit value of the water mark range, the initial luminance threshold is adjusted based on the threshold adjustment coefficient, the initial luminance threshold, and the luminance difference to obtain an adjusted luminance threshold, including:

[0153] Determine an adjustment reduction amount based on the second adjustment coefficient, the initial brightness threshold, and the brightness difference.

[0154] Reduce the initial brightness threshold based on the adjustment reduction amount to obtain an intermediate brightness threshold, and the brightness difference is greater than or equal to the intermediate brightness threshold.

[0155] If the intermediate brightness threshold is less than a preset lower threshold, determine the preset lower threshold as the adjusted brightness threshold.

[0156] In some embodiments, the overdrive compensation table is obtained by:

[0157] Divide the display panel into a plurality of display regions.

[0158] Based on any first test point pixel in the display region and a second test point pixel located in a next row of the first test point pixel, control the first test point pixel to display full gray scale and control the second test point pixel to display a preset gray scale, and obtain each current brightness of the second test point pixel, respectively.

[0159] Based on the deviation of each current brightness from the target brightness at the preset gray scale, obtain each overdrive gray scale corresponding to the second test point pixel displaying the preset gray scale when the first test point pixel displays full gray scale.

[0160] Based on each overdrive gray scale corresponding to the second test point pixel displaying different preset gray scales, generate an overdrive compensation table of the display region to perform overdrive compensation on any two adjacent rows of point pixels in the display region.

[0161] It can be understood that the display compensation device provided by the present application can more accurately identify light load and heavy load images by setting an adaptive threshold. If the gray scale difference between the current row and the previous row is less than the overdrive threshold, it will be judged as light load, so the row overdrive will not be enabled. Since the overdrive threshold is determined based on the Demura compensation value and can be adjusted according to the Demura result, the water mark phenomenon caused by the conflict between Demura and LOD can be effectively reduced while ensuring the Demura effect, and the display effect is improved.

[0162] Correspondingly, please refer to Figure 5 , Figure 5 The structural diagram of the display device of the embodiment of the present application is shown. The display device provided by the embodiment of the present application comprises a display panel and a processor. The processor performs brightness compensation on the display panel by using the display compensation method disclosed in any of the foregoing embodiments, or the processor uses the display compensation device disclosed in any of the foregoing embodiments.

[0163] The display device can be a terminal, which specifically can include but is not limited to various types of liquid crystal displays, including televisions, computer monitors, laptop computer displays, etc.

[0164] Correspondingly, the embodiment of the present application further provides a storage medium, wherein the storage medium stores computer executable instructions, and when the computer executable instructions are loaded and executed by a processor, the display compensation method disclosed in any of the foregoing embodiments is realized. For the specific steps of the method, refer to the corresponding content disclosed in the foregoing embodiments, which will not be described here.

[0165] The foregoing has introduced in detail a display compensation method, device and display device provided by the embodiment of the present application. The principle and implementation mode of the present application are described by applying specific examples in this paper, and the foregoing embodiment is only used to help understand the technical solution and core idea of the present application; the person skilled in the art should understand that the technical solution recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A display compensation method, characterized in that, Applied to a display panel, the display panel comprising an array of sub-pixels, the method includes: Based on any preset gray level in the full gray level, obtain the brightness uniformity compensation gray level corresponding to each sub-pixel. Based on the first and second point pixels in any column of sub-pixels, obtain the overdrive threshold corresponding to the second point pixel at the preset gray level. The first point pixel is a sub-pixel located in the row above the second point pixel. The overdrive threshold is determined based on the brightness uniformity compensation gray level corresponding to the first point pixel and the brightness uniformity compensation gray level corresponding to the second point pixel. The sum of the absolute value of the brightness uniformity compensation gray level corresponding to the first point pixel and the absolute value of the brightness uniformity compensation gray level corresponding to the second point pixel is determined as the overdrive threshold corresponding to the second point pixel at the preset gray level. If the difference between the first gray level and the second gray level is greater than or equal to the overdrive threshold, then overdrive compensation is initiated for the second pixel. The first gray level is equal to the sum of the brightness uniformity compensation gray level corresponding to the first pixel and the preset gray level, and the second gray level is equal to the sum of the brightness uniformity compensation gray level corresponding to the second pixel and the preset gray level.

2. A display compensation method, characterized in that, Applied to a display panel, the display panel comprising an array of sub-pixels, the method includes: Based on any preset gray level in the full gray level, obtain the brightness uniformity compensation gray level corresponding to each sub-pixel. Based on a first pixel and a second pixel in any column of sub-pixels, obtain the overdrive threshold corresponding to the second pixel at the preset grayscale. The first pixel is a sub-pixel located in the row above the second pixel. The overdrive threshold is determined based on the brightness uniformity compensation grayscale corresponding to the first pixel and the brightness uniformity compensation grayscale corresponding to the second pixel. The sum of the absolute value of the brightness uniformity compensation grayscale corresponding to the first pixel and the absolute value of the brightness uniformity compensation grayscale corresponding to the second pixel is determined as the initial threshold corresponding to the second pixel at the preset grayscale. Based on the first grayscale and the second grayscale, obtain the overdrive grayscale of the second pixel from the overdrive compensation table of the display panel. Obtain the first brightness corresponding to the first pixel displaying the first grayscale and the second brightness corresponding to the second pixel displaying the overdrive grayscale. If the brightness difference between the first brightness and the second brightness meets the watermark range corresponding to the required level of the display panel, then determine the initial threshold as the overdrive threshold corresponding to the second pixel at the preset grayscale. If the difference between the first gray level and the second gray level is greater than or equal to the overdrive threshold, then overdrive compensation is initiated for the second pixel. The first gray level is equal to the sum of the brightness uniformity compensation gray level corresponding to the first pixel and the preset gray level, and the second gray level is equal to the sum of the brightness uniformity compensation gray level corresponding to the second pixel and the preset gray level.

3. The display compensation method according to claim 2, characterized in that, The method further includes: If the brightness difference exceeds the watermark range corresponding to the required level of the display panel, then based on the first target brightness corresponding to the first gray level when the target sub-pixel displays the first gray level, and the second target brightness corresponding to the second gray level when the target sub-pixel displays the second gray level, the initial brightness threshold corresponding to the initial threshold is obtained, and the target sub-pixel is the sub-pixel that first receives the display data in the display panel; The initial brightness threshold is adjusted based on the threshold adjustment coefficient, the initial brightness threshold, and the brightness difference to obtain the adjusted brightness threshold; Determine the target gray level corresponding to the adjusted brightness threshold; The target grayscale is determined as the overdrive threshold corresponding to the second pixel at the preset grayscale.

4. The display compensation method according to claim 3, characterized in that, The threshold adjustment coefficient includes a first adjustment coefficient and a second adjustment coefficient; If the brightness difference is greater than the upper limit of the watermark range, the adjustment of the initial brightness threshold based on the threshold adjustment coefficient, the initial brightness threshold, and the brightness difference to obtain the adjusted brightness threshold includes: The adjustment increase amount is determined based on the first adjustment coefficient, the initial brightness threshold, and the brightness difference; Based on the adjustment increase, the initial brightness threshold is increased to obtain an intermediate brightness threshold, and the brightness difference is less than or equal to the intermediate brightness threshold. If the intermediate brightness threshold is greater than the preset upper limit threshold, then the preset upper limit threshold is determined as the adjusted brightness threshold.

5. The display compensation method according to claim 4, characterized in that, Based on the first adjustment coefficient, the initial brightness threshold, and the brightness difference, the adjustment increase is determined, including: The adjustment increase is determined using the following formula: ； Wherein, ΔTh1(Lv) is the adjustment increment, a is the first adjustment coefficient, a>0, ΔLv is the brightness difference, and Th_base(Lv) is the initial brightness threshold.

6. The display compensation method according to claim 4, characterized in that, If the brightness difference is less than the lower limit of the watermark range, the adjustment of the initial brightness threshold based on the threshold adjustment coefficient, the initial brightness threshold, and the brightness difference to obtain the adjusted brightness threshold includes: The adjustment reduction amount is determined based on the second adjustment coefficient, the initial brightness threshold, and the brightness difference; Based on the adjustment reduction amount, the initial brightness threshold is reduced to obtain an intermediate brightness threshold, and the brightness difference is greater than or equal to the intermediate brightness threshold. If the intermediate brightness threshold is less than the preset lower threshold, then the preset lower threshold is determined as the adjusted brightness threshold.

7. The display compensation method according to claim 2, characterized in that, The overdrive compensation table is obtained in the following way: The display panel is divided into multiple display areas; Based on any first test point pixel in the display area, and a second test point pixel located in the next row below the first test point pixel, control the first test point pixel to display full grayscale, and control the second test point pixel to display the preset grayscale, and obtain the current brightness of each of the second test point pixels respectively; Based on the deviation between each current brightness and the target brightness under the preset grayscale, when the first test point pixel displays the full grayscale, obtain each overdrive grayscale corresponding to the second test point pixel displaying the preset grayscale; Based on the overdrive gray levels corresponding to different preset gray levels displayed by the second test point pixels, an overdrive compensation table for the display area is generated to perform overdrive compensation on the pixels of any two adjacent rows in the display area.

8. A display compensation device, characterized in that, Applied to a display panel, the display panel including a plurality of sub-pixels arranged in an array, the device includes: The brightness uniformity compensation module is used to obtain the brightness uniformity compensation gray level corresponding to each sub-pixel based on any preset gray level in the full gray level. The overdrive threshold invocation module is used to obtain the overdrive threshold corresponding to the second pixel at the preset grayscale based on the first pixel and the second pixel in any column of sub-pixels. The first pixel is a sub-pixel located in the row above the second pixel. The overdrive threshold is determined based on the brightness uniformity compensation grayscale corresponding to the first pixel and the brightness uniformity compensation grayscale corresponding to the second pixel. The overdrive threshold corresponding to the second pixel at the preset grayscale is determined by the following method: the sum of the absolute value of the brightness uniformity compensation grayscale corresponding to the first pixel and the absolute value of the brightness uniformity compensation grayscale corresponding to the second pixel is determined as the overdrive threshold corresponding to the second pixel at the preset grayscale. The overdrive compensation module is used to initiate overdrive compensation for the second pixel if the difference between the first gray level and the second gray level is greater than or equal to the overdrive threshold. The first gray level is the sum of the brightness uniformity compensation gray level corresponding to the first pixel and the preset gray level, and the second gray level is the sum of the brightness uniformity compensation gray level corresponding to the second pixel and the preset gray level.

9. A display compensation device, characterized in that, Applied to a display panel, the display panel including a plurality of sub-pixels arranged in an array, the device includes: The brightness uniformity compensation module is used to obtain the brightness uniformity compensation gray level corresponding to each sub-pixel based on any preset gray level in the full gray level. The overdrive threshold invocation module is used to obtain the overdrive threshold corresponding to the second pixel at a preset grayscale based on a first pixel and a second pixel in any column of sub-pixels. The first pixel is a sub-pixel located in the row above the second pixel. The overdrive threshold is determined based on the brightness uniformity compensation grayscale corresponding to the first pixel and the brightness uniformity compensation grayscale corresponding to the second pixel. The overdrive threshold corresponding to the second pixel at the preset grayscale is determined by: taking the absolute value of the brightness uniformity compensation grayscale corresponding to the first pixel and the brightness uniformity compensation grayscale corresponding to the second pixel. The sum of the absolute values ​​of the uniformity compensation gray levels is determined as the initial threshold corresponding to the second pixel at the preset gray level; based on the first gray level and the second gray level, the overdrive gray level of the second pixel is obtained from the overdrive compensation table of the display panel; the first brightness corresponding to the first pixel displaying the first gray level is obtained, and the second brightness corresponding to the second pixel displaying the overdrive gray level is obtained; if the brightness difference between the first brightness and the second brightness meets the watermark range corresponding to the requirement level of the display panel, then the initial threshold is determined as the overdrive threshold corresponding to the second pixel at the preset gray level; The overdrive compensation module is used to initiate overdrive compensation for the second pixel if the difference between the first gray level and the second gray level is greater than or equal to the overdrive threshold. The first gray level is the sum of the brightness uniformity compensation gray level corresponding to the first pixel and the preset gray level, and the second gray level is the sum of the brightness uniformity compensation gray level corresponding to the second pixel and the preset gray level.

10. A display device, characterized in that, The device includes a display panel and a processor, wherein the processor performs brightness compensation on the display panel using the display compensation method as described in any one of claims 1-7, or the processor uses a display compensation device as described in claim 8 or 9.

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