Display compensation method, device and equipment

Abstract

The invention provides a display compensation method, device and equipment, the display compensation method is applied to a display panel, the display panel comprises a plurality of pixel units, each pixel unit comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, the sub-pixels in each pixel unit are arranged in an array mode to form a plurality of sub-pixel columns, and in every two adjacent sub-pixel columns, the red sub-pixel, the green sub-pixel and the blue sub-pixel are arranged in an array mode. One sub-pixel column comprises red sub-pixels and green sub-pixels which are alternately arranged in the column direction, and the other sub-pixel column comprises a plurality of blue sub-pixels. On the basis, the display compensation method comprises the following steps: firstly, carrying out dark pixel point detection on the display panel to obtain dark pixel points of the display panel; then, for each dark pixel point, determining a target compensation pixel point according to the dark pixel point; according to the invention, gray scale compensation is carried out on the target compensation pixel points to reduce the display brightness of the target compensation pixel points, so that the visual perception of a color point phenomenon is reduced, and the method has the advantages of improving the display uniformity and improving the product yield.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to display compensation methods, devices and equipment. Background Art

[0002] In the field of organic electroluminescence display (OLED) technology, medium-sized display panels such as in-car central control screens and laptop screens often use a real red green blue subpixel arrangement (Real RGB). The typical characteristics of this arrangement are: red (R) and green (G) subpixels are arranged in alternating columns (i.e., one column of R and one column of G are repeated), and blue (B) subpixels are arranged in a separate column. This arrangement is limited by the opening accuracy of the fine metal mask (FMM) in the evaporation process and is currently the mainstream solution for mass production of medium-sized OLEDs.

[0003] However, the Real RGB arrangement suffers from significant color cast issues caused by dark pixels. When a single sub-pixel becomes dark due to backplane manufacturing defects, the larger spacing between sub-pixels of the same color in the panel creates a lack of brightness complemented by surrounding sub-pixels of the same color. This causes the dark pixel to appear noticeably color-shifted against a white screen. For example, a dark green sub-pixel will appear magenta-purple, a dark red sub-pixel will appear cyan-blue, and a dark blue sub-pixel will appear yellow. These color casts significantly degrade the visual quality of the display panel, leading to reduced product yield.

[0004] Conventional solutions to this problem in the industry currently include dark pixel count control and repair circuit replacement. Dark pixel count control uses optical inspection equipment to screen panels with dark pixel counts below a threshold for shipment, but it cannot fundamentally eliminate existing color dot issues. Repair circuit replacement uses laser repair or circuit compensation technology to replace failed data lines. However, this repair process is complex, has a low success rate, and may introduce new display defects such as uneven brightness in the repaired area. Summary of the Invention

[0005] The purpose of this application is to provide a display compensation method, device and equipment to improve the technical problem of color point phenomenon caused by dark pixels, and enhance the advantages of display uniformity and product yield.

[0006] The present application provides a display compensation method, which is applied to a display panel. The display panel includes a plurality of pixel units, each pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The sub-pixels in each pixel unit are arranged in an array to form a plurality of sub-pixel columns. Of two adjacent sub-pixel columns, one sub-pixel column includes the red sub-pixels and the green sub-pixels arranged alternately in a column direction, and the other sub-pixel column includes a plurality of blue sub-pixels. The method includes:

[0007] Performing dark pixel detection on the display panel to obtain dark pixel points of the display panel, wherein the dark pixel points include at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel;

[0008] For each of the dark pixels, determining a target compensation pixel according to the dark pixel, wherein the target compensation pixel is a sub-pixel of a complementary color adjacent to the dark pixel;

[0009] Grayscale compensation is performed on the target compensation pixel point to reduce the display brightness of the target compensation pixel point.

[0010] In some embodiments, detecting dark pixels on the display panel to obtain dark pixels of the display panel includes:

[0011] For a plurality of set sampling pixel points, obtaining a brightness value of each of the sampling pixel points of the display panel at a preset grayscale;

[0012] Determining whether the brightness value falls within a preset dark pixel detection threshold range;

[0013] When the brightness value falls within the dark pixel detection threshold range, the sampling pixel corresponding to the brightness value is determined to be the dark pixel.

[0014] In some embodiments, the sampling pixel point is the green sub-pixel.

[0015] In some embodiments, the preset grayscale includes at least two target grayscales; and obtaining the brightness value of each sampling pixel of the display panel at the preset grayscale includes:

[0016] When the display panel is in a lighted state, controlling the display panel to sequentially display the grayscale image corresponding to each target grayscale;

[0017] For each of the sampling pixel points, an average brightness value of the sampling pixel point in a plurality of grayscale images corresponding to each of the target grayscales is obtained as the brightness value of the sampling pixel point at the preset grayscale.

[0018] In some embodiments, for each of the dark pixels, determining a target compensation pixel according to the dark pixel includes:

[0019] For each of the dark pixels, determining the row and column coordinates of the dark pixel and the type of the dark pixel;

[0020] According to the row and column coordinates of the dark pixel and the type of the dark pixel, a complementary color sub-pixel adjacent to the dark pixel is determined as the target compensation pixel.

[0021] In some embodiments, determining a complementary color sub-pixel adjacent to the dark pixel as the target compensation pixel according to the row and column coordinates of the dark pixel and the type of the dark pixel includes:

[0022] When the color type of the dark pixel is a first color, determining that the complementary color sub-pixel is a second color according to the row and column coordinates of the dark pixel and the first color; the first color is any one of red, green, and blue; and the second color is any color among the red, green, and blue except the first color;

[0023] The sub-pixel of the second color is determined as the target compensation pixel point.

[0024] In some embodiments, performing grayscale compensation on the target compensation pixel to reduce the display brightness of the target compensation pixel includes:

[0025] Obtaining an initial grayscale value of the target compensation pixel;

[0026] Grayscale compensation is performed on the target compensation pixel point according to the grayscale compensation coefficient and the initial grayscale value to obtain a target grayscale value; the grayscale compensation coefficient is determined according to the brightness of the dark pixel point, the target white brightness and the initial grayscale value; at the target grayscale value, the brightness of the target compensation pixel point after grayscale compensation is less than or equal to the preset brightness.

[0027] In some embodiments, the method further comprises:

[0028] Determining whether there are two target dark pixel points adjacent to each other in a column direction among the plurality of dark pixel points;

[0029] If there are two adjacent target dark pixels in the column direction, the target dark pixel located in an odd row of the two adjacent target dark pixels is defined as a first target dark pixel, and the target dark pixel located in an even row is defined as a second target dark pixel;

[0030] A first complementary color sub-pixel adjacent to the first target dark pixel is used as a first target compensation pixel, and a second complementary color sub-pixel adjacent to the second target dark pixel is used as a second target compensation pixel.

[0031] In some embodiments, performing grayscale compensation on the target compensation pixel to reduce the display brightness of the target compensation pixel includes:

[0032] Grayscale compensation is performed using different grayscale compensation algorithms for the first target compensation pixel point and the second target compensation pixel point respectively.

[0033] In some embodiments, performing grayscale compensation on the first target compensation pixel and the second target compensation pixel using different grayscale compensation algorithms respectively includes:

[0034] Obtaining a first initial grayscale value of the first target compensation pixel and a second initial grayscale value of the second target compensation pixel;

[0035] performing grayscale compensation on the first target compensation pixel according to a first grayscale compensation coefficient and the first initial grayscale value to obtain a first target grayscale value; the first grayscale compensation coefficient is determined according to the brightness of the first dark pixel, the first target white brightness, and the first initial grayscale value; at the first target grayscale value, the brightness of the first target compensation pixel after grayscale compensation is less than or equal to a preset brightness;

[0036] Grayscale compensation is performed on the second target compensation pixel point according to the second grayscale compensation coefficient and the second initial grayscale value to obtain a second target grayscale value; the second grayscale compensation coefficient is determined according to the brightness of the second dark pixel point, the second target white brightness and the second initial grayscale value; at the second target grayscale value, the brightness of the second target compensation pixel point after grayscale compensation is less than or equal to the preset brightness.

[0037] In some embodiments, the method further includes obtaining a demura compensation value of the target compensation pixel point, and performing demura compensation on the target compensation pixel point after grayscale compensation according to the demura compensation value.

[0038] The present application also provides a display compensation device, applied to a display panel, the display panel including a plurality of pixel units, each pixel unit including a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the sub-pixels in each pixel unit being arranged in an array to form a plurality of sub-pixel columns, one of two adjacent sub-pixel columns including the red sub-pixels and the green sub-pixels arranged alternately in a column direction, and the other sub-pixel column including a plurality of blue sub-pixels, the device comprising:

[0039] a detection unit, configured to perform dark pixel detection on the display panel to obtain dark pixels of the display panel, wherein the dark pixels include at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel;

[0040] a determining unit, configured to determine, for each of the dark pixels, a target compensation pixel according to the dark pixel;

[0041] The compensation unit is used to perform grayscale compensation on the target compensation pixel point to reduce the display brightness of the target compensation pixel point.

[0042] The present application also provides a display compensation device, which is communicatively connected to the display panel. The display compensation device is used to obtain compensation data according to a corresponding compensation algorithm and write the compensation data into the register of the display panel to perform display compensation on the display panel.

[0043] In summary, the display compensation method, device and equipment provided in this application effectively reduce the visual perception of color dot phenomenon by detecting dark pixels and selecting adjacent complementary color sub-pixels for grayscale compensation, and have the advantages of improving display uniformity and increasing product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present application is further described below with reference to the accompanying drawings. It should be noted that the drawings described below are only used to illustrate some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0045] Figure 1 A schematic diagram of an application scenario of the display compensation method provided in an embodiment of the present application.

[0046] Figure 2 A flowchart of a display compensation method provided in an embodiment of the present application.

[0047] Figure 3 This is an exemplary schematic diagram of the detection of the number of dark pixels and the actual positions of dark pixels in an embodiment of the present application.

[0048] Figure 4 This is an exemplary schematic diagram of an embodiment of the present application in which the number of dark pixels is 5.

[0049] Figure 5 This is an exemplary schematic diagram of display compensation for a single G dark pixel in an embodiment of the present application.

[0050] Figure 6 Schematic diagram of grayscale compensation of target compensation pixels using a 1×1 block approach in an embodiment of the present application.

[0051] Figure 7 This is a schematic diagram of an application scenario of the compensation method in an embodiment of the present application.

[0052] Figure 8 This is a schematic diagram showing a compensation device in an embodiment of the present application. DETAILED DESCRIPTION

[0053] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0054] In the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In addition, it should be noted that the drawings only provide structures that are closely related to this application, and some details that are not closely related to the invention are omitted. The purpose is to simplify the drawings and make the invention clear at a glance, rather than to indicate that the actual device is the same as the attached drawings. Figure 1 The same is true, not set to the actual device limit.

[0055] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase at various times in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] The present invention provides a display compensation device for obtaining compensation data according to a corresponding compensation algorithm and writing the compensation data into a register of a display panel to perform display compensation on the display panel. The display compensation device may perform, but is not limited to, the following embodiments and combinations thereof.

[0057] Figure 1 Schematic diagram of an application scenario of the display compensation method provided in an embodiment of the present application; Figure 1As shown, the display compensation device can capture a predefined grayscale surface displayed by a display panel by controlling an industrial camera, such as a charge-coupled device camera (CCD), to collect brightness distribution data of the display panel to identify dark pixels of the display panel. Then, compensation data is obtained according to a corresponding compensation algorithm, and the compensation data is burned into the register of the display panel to perform display compensation on the display panel. The compensation algorithm can be integrated into a display driver integrated circuit (IC), such as a timing controller (Tcon); the CCD camera can include, but is not limited to, a Demura camera.

[0058] Furthermore, the display compensation method provided in the present application can be executed by the display compensation device and applied to a display panel, wherein the display panel includes a plurality of pixel units, each pixel unit includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the sub-pixels in each of the pixel units are arranged in an array to form a plurality of sub-pixel columns. Among two adjacent sub-pixel columns, one of the sub-pixel columns includes the red sub-pixels and the green sub-pixels arranged alternately in the column direction, and the other sub-pixel column includes a plurality of blue sub-pixels.

[0059] In some embodiments, as Figure 2 As shown, Figure 2 A flow chart of a display compensation method provided in an embodiment of the present application; the display compensation method may include but is not limited to the following steps and a combination of the following steps S1-S3.

[0060] S1. Perform dark pixel detection on the display panel to obtain dark pixel points of the display panel, wherein the dark pixel points include at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel.

[0061] S2: for each of the dark pixels, determine a target compensation pixel according to the dark pixel, wherein the target compensation pixel is a sub-pixel of a complementary color adjacent to the dark pixel.

[0062] S3, performing grayscale compensation on the target compensation pixel point to reduce the display brightness of the target compensation pixel point.

[0063] Among them, the dark pixel detection can be to identify sub-pixels that cannot emit light normally, which can be specifically achieved by brightness measurement under a preset grayscale, such as detecting sub-pixels with brightness below a threshold in a low grayscale image. The target compensation pixel can be an adjacent sub-pixel (complementary color sub-pixel) that is complementary to the color of the dark pixel. For example, as an example, the compensation display method of this embodiment is used for a display panel with Real RGB arranged sub-pixels. If the dark pixel is an R sub-pixel, then its complementary color sub-pixel includes a G sub-pixel and a B sub-pixel. Correspondingly, if the dark pixel is a G sub-pixel, then its complementary color sub-pixel includes an R sub-pixel and a B sub-pixel; if the dark pixel is a B sub-pixel, then its complementary color sub-pixel includes an R sub-pixel and a G sub-pixel.

[0064] Furthermore, specific compensation methods can be determined through coordinate positioning and color matching algorithms. For example, if a dark pixel is an R sub-pixel, its corresponding RGB primary color display effect is a cyan dot. Grayscale compensation can be achieved by adjusting the drive voltage or current of the target sub-pixel corresponding to the dot (the target compensation pixel corresponding to the dark pixel, the G and B sub-pixels). This can be achieved using a lookup table or linear interpolation algorithm. For example, a compensation coefficient is calculated based on the difference between the brightness of the dark pixel and the target white balance, and the corresponding compensation coefficient is then written into a register of the display panel to achieve grayscale compensation of the display panel. Specifically, after detecting a dark pixel, adjacent complementary color sub-pixels are selected as target compensation pixels based on their location coordinates and color type. For example, when a green sub-pixel fails, the brightness of the adjacent red and blue sub-pixels is reduced, so that the grayscale combination of the green sub-pixel and the surrounding red and blue sub-pixels, consisting of the three RGB primary color sub-pixels, approaches black, thereby resolving the dot problem. During the compensation process, a dynamic adjustment mechanism can be used to match the corresponding compensation intensity or compensation coefficient based on the actual brightness value of the dark pixel to avoid brightness abrupt changes caused by overcompensation.

[0065] This application uses a software algorithm to adjust the brightness of adjacent sub-pixels, directly changing the optical properties of a local area without modifying the hardware structure or adding additional manufacturing steps. For example, compared to traditional methods that require interrupting the production line for laser repair to treat a single dark pixel, this application can implement compensation in real time within the display driver chip, significantly improving processing efficiency.

[0066] Through the above technical solution, this application effectively compensates for color dots on white screens to near-black, reducing the human eye's sensitivity to defects. This method, while maintaining the physical structure of the display panel, achieves defect masking through algorithmic optimization, improving display quality. Compared to physical repair solutions, this application can reduce the panel scrap rate caused by dark pixels while avoiding the risk of secondary defects introduced by the repair process.

[0067] In some embodiments, when performing dark pixel detection on the display panel, the brightness value of each sampling pixel of the display panel at a preset grayscale can be obtained for a set number of sampling pixel points; then, it is determined whether the brightness value falls within a preset dark pixel detection threshold range. If the brightness value falls within the dark pixel detection threshold range, the sampling pixel corresponding to the brightness value is determined to be the dark pixel point.

[0068] The dark pixel detection threshold range may be determined according to actual conditions and is not limited here. As an example, the dark pixel detection threshold range may be 0.45 to 0.6.

[0069] The sampling pixel point can be a pre-selected sub-pixel position for detecting dark pixels, which can be achieved by uniformly distributing coordinate points in a specific area of ​​the display panel or across the entire screen, for example, selecting a sampling point every fixed number of pixel units. In this embodiment, it is considered that the human eye is more sensitive to the color point problem caused by the green sub-pixel (G), because the display panel defect caused by the green sub-pixel is more prominent. In order to focus on monitoring the color point phenomenon caused by the green sub-pixel, the sampling pixel point can be a green sub-pixel. The dark pixel detection threshold range can be a critical brightness interval for determining whether a sub-pixel is a dark pixel. Specifically, the upper and lower limits can be set after experimentally measuring the brightness distribution range of normal sub-pixels at different grayscales. For example, the area with brightness lower than 50% of the normal value is defined as the threshold range. By setting multi-grayscale detection and dynamic threshold judgment, it can adapt to the dark pixel recognition needs under different display environments and avoid misjudgment or missed detection caused by single grayscale detection.

[0070] Specifically, when the display panel is on, the control panel displays the grayscale images corresponding to each target grayscale in sequence, for example, first displaying a low grayscale image and then switching to a high grayscale image. For each sampling pixel, the average brightness value at each target grayscale is obtained through an industrial camera or the brightness detection circuit built into the panel. When the brightness value of a sampling point is continuously lower than the preset threshold, it can be determined that there is a dark pixel defect at that location. For example, the brightness of the G sub-pixel is measured at a low grayscale of 50 and a high grayscale of 200 respectively. If both measurement values ​​are lower than 30% of the normal brightness of the corresponding grayscale, the G sub-pixel is determined to be a dark pixel. This multi-grayscale detection method can effectively distinguish temporary brightness fluctuations from real dark pixel defects, thereby improving detection accuracy.

[0071] As an example, the dark pixel and normal pixel detection threshold range can be understood as the brightness setting ratio, which is between 0.45 and 0.6. If it is set too high, it is easy to detect foreign objects on the screen as dark pixels, and if it is set too low, it is easy to miss detection. The relative brightness difference between the dark pixel G and the surrounding normal pixels is used to detect the number of color dots on the surface, which involves the detection rate. Figure 3 and Figure 4 As shown, Figure 3 This is an exemplary schematic diagram of the detection of the number of dark pixels and the actual positions of dark pixels in an embodiment of the present application.

[0072] Figure 4 This is an exemplary diagram of an embodiment of the present application in which the number of dark pixels is 5. Card control is performed by setting thresholds for multiple grayscale images. For example, in a 500-nit lighting environment, images of grayscales L32, L128, and L255 displayed on the display panel are photographed and tested to obtain the number of dark pixels.

[0073] This application combines multi-grayscale detection with dynamic thresholding to establish a more accurate dark pixel identification model. For example, existing technologies may misidentify a normal sub-pixel's brightness drop as a dark pixel in a high-temperature environment. However, this application compares the brightness attenuation ratio at different grayscales to accurately identify true defects and reduce the false positive rate.

[0074] Thus, through the above technical solution, this application can effectively improve the accuracy and stability of dark pixel detection, avoiding misjudgments caused by environmental factors or signal interference. The multi-grayscale detection mechanism can comprehensively evaluate the working status of sub-pixels under different driving conditions, and the dynamic threshold setting can adapt to the changes in brightness attenuation characteristics caused by panel aging, ensuring the long-term reliability of dark pixel determination. This provides precise defect location data for subsequent compensation operations, fundamentally ensuring the implementation of the display quality improvement solution.

[0075] In some embodiments, the sampling pixel is the green sub-pixel. The green sub-pixel can be a sub-pixel unit in a display panel that emits green light, and can be implemented using an organic light-emitting diode structure formed by an evaporation process. Brightness changes in the green sub-pixel significantly affect the white balance of the overall display. Using the green sub-pixel as the sampling point during dark pixel detection prioritizes capturing anomalies in the green channel, to which the human eye is more sensitive, thereby more efficiently locating dark pixel defects that affect visual perception.

[0076] Specifically, when the display panel is lit, multiple preset grayscale images are displayed in sequence, and for each green sub-pixel, Figure 1The industrial camera shown captures the average brightness value at each grayscale level. When the brightness value falls below the dark pixel detection threshold, the green sub-pixel is considered dark. Because green sub-pixels alternate with red sub-pixels in the Real RGB array, and green light wavelengths contribute most to the human eye's visual brightness, prioritizing green sub-pixels allows for rapid identification of critical dark pixels that cause color casts in white images, thereby triggering subsequent compensation mechanisms.

[0077] It should be noted that the sampling pixel point may also be a red sub-pixel or a blue sub-pixel. For example, when it is necessary to focus on color point monitoring of the red sub-pixel or the blue sub-pixel, the red sub-pixel or the blue sub-pixel may also be used as a sampling pixel point.

[0078] By focusing on green sub-pixel detection, this application reduces computing resource consumption while ensuring accurate dark pixel identification. This is particularly applicable to Real RGB panels with large green sub-pixel column spacing. This allows for rapid location of reddish-purple color spots caused by dark pixels formed by green sub-pixels. Subsequent grayscale compensation of complementary color sub-pixels effectively reduces the visual significance of dark pixel areas, improving the uniformity of the display panel under white conditions.

[0079] In some embodiments, the preset grayscale includes at least two target grayscales; and obtaining the brightness value of each sampling pixel of the display panel at the preset grayscale includes:

[0080] When the display panel is in a lighted state, controlling the display panel to sequentially display the grayscale image corresponding to each target grayscale;

[0081] For each of the sampling pixel points, an average brightness value of the sampling pixel point in a plurality of grayscale images corresponding to each of the target grayscales is obtained as the brightness value of the sampling pixel point at the preset grayscale.

[0082] Among them, the preset grayscale can be a plurality of brightness levels for dark pixel detection, for example, it can include low grayscale, medium grayscale and high grayscale, and multi-level detection can be used to avoid missing dark pixels under a single grayscale. The grayscale picture corresponding to the target grayscale can be a monochrome picture output by the display panel under a specific driving voltage. For example, three grayscale pictures with grayscale values ​​of 50, 128, and 200 can be set, and the luminous state of the sub-pixel is stimulated by pictures of different brightness levels. The average brightness value can be the average calculation of the brightness data of the same sampling pixel at different time points or different grayscale pictures. For example, the average value is obtained by collecting brightness data three times in a row under a picture with a grayscale value of 50, which can eliminate instantaneous measurement errors or environmental interference.

[0083] Specifically, during the dark pixel detection process, the display panel is driven to different target grayscale states in sequence. For example, a grayscale image with a grayscale value of 50 is first displayed, and the brightness data of each sampled pixel is collected by an industrial camera; then the image is switched to a grayscale image with a grayscale value of 128 and the collection is repeated, and finally the image is switched to a high grayscale image to complete multi-level detection. For each sampled pixel, the brightness data at different grayscales are averaged separately, such as the average of three measurements at grayscale 50 and the average of five measurements at grayscale 128, to form the stable brightness characteristics of the pixel at different brightness levels. Through multi-grayscale detection, abnormal situations that may occur in dark pixels at low or high brightness states can be covered. For example, some dark pixels only show brightness attenuation due to insufficient driving voltage at low grayscale, but can still maintain normal luminescence at high grayscale due to voltage saturation.

[0084] This application uses multi-grayscale screen switching and data averaging to more comprehensively capture the abnormal performance of pixels under different working conditions, thereby improving the coverage and stability of dark pixel recognition. In this way, it can effectively solve the problem of missed detection of dark pixels due to single grayscale detection and improve detection accuracy. For example, for dark pixels that only experience brightness decay at low grayscales, they can be accurately identified by adding a low grayscale detection layer; for dark pixels with unstable brightness due to voltage fluctuations, random errors can be eliminated by taking the average of multiple measurements. This provides a more reliable dark pixel data basis for subsequent compensation algorithms, thereby improving the overall compensation effect.

[0085] In some embodiments, for each of the dark pixels, determining a target compensation pixel according to the dark pixel includes:

[0086] For each of the dark pixels, determining the row and column coordinates of the dark pixel and the type of the dark pixel;

[0087] According to the row and column coordinates of the dark pixel and the type of the dark pixel, a complementary color sub-pixel adjacent to the dark pixel is determined as the target compensation pixel.

[0088] Among them, the row and column coordinates can be used to locate the specific position of the dark pixel point through the row and column numbers of the pixel matrix. Specifically, this can be achieved using a two-dimensional coordinate system. For example, a coordinate system is established with the upper left corner of the display panel as the origin, and the physical position coordinates of the abnormal sub-pixel are obtained through the detection circuit. The dark pixel type can be used to identify the color channel failure category corresponding to the dark pixel point. Specifically, it can be achieved by collecting the brightness data of the three primary colors through an industrial camera. For example, when the brightness of the green sub-pixel is lower than the threshold, it is determined to be a G-type dark pixel point. The complementary color sub-pixel can be a color sub-pixel that is 180 degrees opposite to the color of the dark pixel point on the color wheel. Specifically, it can be achieved using the complementary relationship in the RGB color space. For example, red and cyan are complementary, green and magenta are complementary, and blue and yellow are complementary.

[0089] Specifically, when a dark pixel is detected in a certain row or column, the color type of the pixel is first analyzed. For example, when a red dark pixel is detected in the 3rd row and 5th column, the adjacent green or blue sub-pixel is located as the compensation object. Through the coordinate offset algorithm, the nearest complementary color sub-pixel is searched in the adjacent sub-pixel columns. For example, if the column where the red dark pixel is located is an R / G alternating column, the B sub-pixel in the adjacent blue sub-pixel column may be selected as the target compensation pixel. This compensation strategy takes advantage of the human eye's perception of complementary color superposition. By reducing the brightness of the complementary colors, the dark pixel area as a whole approaches neutral gray, thereby weakening the color cast phenomenon.

[0090] This application uses coordinate positioning and complementary color matching mechanisms to accurately identify the target compensation pixels that need to be adjusted, and actively corrects brightness deviations in combination with grayscale control. The fixed area compensation method used in the prior art easily leads to a decrease in picture uniformity, while this application uses a dynamic selection mechanism based on complementary color relationships, which can effectively eliminate local color spots while maintaining the balance of the overall picture. In this way, the optimal compensation pixel can be quickly determined based on the position and color characteristics of the dark pixel point, and the color cast phenomenon in the dark pixel area can be neutralized using the principle of complementary color superposition. This solution effectively reduces the visual significance of dark pixels appearing red, purple, cyan or yellow under a white screen, improves the yield and visual consistency of the display panel, and avoids the cost increase and process complexity problems caused by large-scale circuit repair.

[0091] In some embodiments, determining a complementary color sub-pixel adjacent to the dark pixel as the target compensation pixel according to the row and column coordinates of the dark pixel and the type of the dark pixel includes:

[0092] When the color type of the dark pixel is a first color, determining that the complementary color sub-pixel is a second color according to the row and column coordinates of the dark pixel and the first color; the first color is any one of red, green, and blue; and the second color is any color among the red, green, and blue except the first color;

[0093] The sub-pixel of the second color is determined as the target compensation pixel point.

[0094] The first color can be the color of the dark pixel itself. This can be achieved by performing spectral analysis of the dark pixel using optical detection equipment or a color recognition algorithm. After determining the first color, the second color is automatically matched based on the principle of complementary colors. For example, a red dark pixel corresponds to a green or blue second color. This feature ensures that the selection of the compensating sub-pixel conforms to the laws of color mixing, effectively reducing color cast in dark pixel areas.

[0095] Specifically, when it is detected that the color type of a dark pixel is red, the position of the sub-pixel column in which the dark pixel is located is located according to the row and column coordinates of the dark pixel, and the complementary color sub-pixel is determined to be green or blue. For example, if a red dark pixel is located in an alternating red sub-pixel column, its adjacent sub-pixel column may contain green or blue sub-pixels. By using the green or blue sub-pixels in the adjacent column as the target compensation pixel points, its grayscale value is adjusted to reduce the brightness, so that the pixel unit formed by the three primary color sub-pixels formed around the red dark pixel will not have the color dot phenomenon. For example, reducing the brightness of the green sub-pixels around the red dark pixel can reduce the yellow light generated by the superposition of red and green, thereby reducing the visual significance of the dark pixel.

[0096] This application uses an algorithm to identify complementary color sub-pixels and implement grayscale compensation, achieving color balance in dark pixel areas without modifying the hardware structure. For example, the existing technology can only rely on the brightness of the same color sub-pixels to compensate for dark green pixels. However, this application uses the compensation mechanism of complementary color sub-pixels to effectively suppress color dot phenomenon even in scenes lacking same color sub-pixels.

[0097] Through the above technical solution, the present application can dynamically select complementary color sub-pixels based on the color of dark pixels for compensation. By adjusting the brightness of the complementary colors, the color cast of the dark pixel area is offset, making the dark pixels appear close to black on a white screen. For example, after the brightness of the green sub-pixels around a red dark pixel is reduced, the yellow light of the superposition of red and green is suppressed, and the overall brightness of the dark pixel area approaches black, thereby significantly reducing the impact of color casts on display quality.

[0098] In some embodiments, the method further comprises:

[0099] Determining whether there are two target dark pixel points adjacent to each other in a column direction among the plurality of dark pixel points;

[0100] If there are no two adjacent target dark pixels in the column direction, the aforementioned compensation method is used for each dark pixel to compensate the corresponding complementary color sub-pixel. This compensation method can be understood as performing 1×1 grayscale compensation on the three primary color pixel block where each dark pixel is located.

[0101] Among them, the two target dark pixels adjacent in the column direction can be two abnormal luminous pixels arranged continuously in the vertical direction of the display panel. Specifically, this can be achieved by identifying the abnormal brightness values ​​of adjacent pixels through a coordinate detection algorithm. This feature is used to identify double dark pixel scenes that require special processing. Among them, if the number of sub-pixels between two abnormal sub-pixels is less than a set number (for example, 1 sub-pixel), it can be determined to be a continuous arrangement. Furthermore, if there are no two target dark pixels adjacent in the column direction, it means that the dark pixel points are multiple independently existing single dark pixel points, for example, the single dark pixel point is a G dark pixel point. If Figure 5 and Figure 6 As shown, Figure 5 This is an exemplary diagram of display compensation for a single G dark pixel in an embodiment of the present application. By reducing the brightness of the R / B sub-pixels next to the G dark pixel (adjusting the R / B grayscale values ​​by a calculated offset, also known as the R / B Offset), and then combining them with the G dark pixel to create a W image, the effect of compensating the colored dots into black dots is achieved. Figure 6 Schematic diagram of grayscale compensation of target compensation pixel points using a 1×1 block compensation method in the embodiment of the present application. For the G dark point, a 1×1 block method is used for compensation. The size of the 1×1 block can be determined according to the actual situation and is not limited here. As an example, the Tcon chip of the display panel can be used as follows Figure 6 In some embodiments, performing grayscale compensation on the target compensation pixel to reduce the display brightness of the target compensation pixel includes:

[0102] Obtaining an initial grayscale value of the target compensation pixel;

[0103] Grayscale compensation is performed on the target compensation pixel point according to the grayscale compensation coefficient and the initial grayscale value to obtain a target grayscale value; the grayscale compensation coefficient is determined according to the brightness of the dark pixel point, the target white brightness and the initial grayscale value; at the target grayscale value, the brightness of the target compensation pixel point after grayscale compensation is less than or equal to the preset brightness.

[0104] Among them, the initial grayscale value can be the original brightness control parameter of the target compensation pixel before compensation, which can be achieved by reading the pixel drive data stored in the display driver chip. This parameter is directly related to the actual luminous intensity of the sub-pixel. The grayscale compensation coefficient can be a proportional factor used to adjust the brightness change of the target compensation pixel. Specifically, it can be derived by calculating the difference between the brightness value of the dark pixel and the target white brightness and combining it with the nonlinear relationship of the initial grayscale value. This coefficient can dynamically balance the brightness compensation amplitude and the overall display uniformity. The target white brightness can be the brightness reference value that the display panel expects to achieve under a standard white screen. Specifically, it can be determined by a preset gamma curve or actual measured data from an industrial camera. This parameter provides a normalized benchmark for grayscale compensation.

[0105] Specifically, when a dark pixel is detected, the current drive data of its adjacent target compensation pixel is first obtained as the initial grayscale value. Then, based on the degree of deviation between the brightness of the dark pixel and the target white brightness, combined with the numerical range of the initial grayscale value, the grayscale compensation coefficient is calculated through a preset compensation algorithm. For example, when the brightness of the dark pixel deviates from the target white brightness by more than a threshold, the grayscale compensation coefficient will increase according to an exponential function relationship, thereby applying a higher grayscale attenuation to the target compensation pixel. Finally, by multiplying or superimposing the initial grayscale value and the grayscale compensation coefficient, a target grayscale value is generated and written into the display drive circuit, so that the brightness of the compensated sub-pixel is limited to the preset brightness range, avoiding new brightness anomalies caused by over-compensation.

[0106] By introducing a dynamically calculated grayscale compensation coefficient, this application can adaptively adjust the brightness of dark pixels based on the real-time relationship between the brightness deviation of the target white brightness, maintaining the consistency of the overall brightness of the panel while ensuring compensation accuracy. This effectively suppresses the color cast caused by dark pixels. By precisely controlling the brightness attenuation of the target compensation pixel, the dark pixel area appears close to neutral gray on a white screen, significantly reducing the human eye's sensitivity to color casts while avoiding the local brightness distortion caused by traditional fixed compensation methods.

[0107] In some embodiments, the method further comprises:

[0108] If there are two adjacent target dark pixels in the column direction, grayscale compensation is performed on the two RGB pixel blocks corresponding to the two target dark pixels, which can be understood as compensation in a 1×2 block manner.

[0109] Among them, two target dark pixels adjacent in the column direction can be two abnormally luminous pixels arranged continuously in the vertical direction of the display panel. Specifically, this can be achieved by identifying the abnormal brightness values ​​of adjacent pixels through a coordinate detection algorithm. This feature is used to identify double dark pixel scenes that require special processing. The definition of odd and even rows is based on the scanning order of the display panel drive circuit. Specifically, the gate line drive timing can be used as the judgment basis. This division method can adapt to the compensation requirements of panels with different resolutions. If there are two target dark pixels adjacent in the column direction, it means that the dark pixel is not a discrete single dark pixel.

[0110] As an example, Figure 7 As shown, Figure 7 FIG. 1 is a schematic diagram of an application scenario of the compensation method in the embodiment of the present application. Figure 7 In (a), when n is an odd number, the G dark points in the odd rows are as follows: Figure 7 The compensation amplitude of ② adjacent to the G dark spot in (b) is the same, and compensation is performed in a 1×1 block manner; when n is an odd number and n+1 is an even number, the G dark spot in the even row, that is, the G dark spot is in the even row, such as Figure 7 In (c), the compensation amplitudes of ② and ③ adjacent to the G dark point can be the same or different, and are compensated in a 1×2 block manner. The compensation method can be determined according to the actual situation and is not limited here. As an example, the Tcon chip of the display panel can be used in a 1×1 or 1×2Block manner to use different algorithms to compensate for the G dark pixel points in odd or even rows. The color point compensation value can be superimposed on the Demura compensation value as the final display effect, taking into account the Demura compensation function of the display panel. In actual applications, for multiple dark pixel points, for example, dark pixel points adjacent in the column direction or dark pixel points adjacent in the row direction, reference can be made to Figure 7 The compensation method in is illustrated with an example and will not be described in detail here.

[0111] In some embodiments, if there are two adjacent target dark pixels in the column direction, the target dark pixel located in the odd row of the two adjacent target dark pixels is defined as the first target dark pixel, and the target dark pixel located in the even row is defined as the second target dark pixel; then, the first complementary color sub-pixel adjacent to the first target dark pixel is used as the first target compensation pixel, and the second complementary color sub-pixel adjacent to the second target dark pixel is used as the second target compensation pixel.

[0112] Specifically, when two adjacent dark pixels are detected in the same column, the dual dark pixel compensation mode is automatically triggered. For example, the parity of the row number where the dark pixel is located is determined by the gate drive timing, and the dark pixel in the odd row is marked as the first target dark pixel. Its adjacent complementary color sub-pixel may be located in the left or right sub-pixel column. For dark pixels in even rows, the complementary color sub-pixel in the sub-pixel column on the other side is selected as the compensation object. For example, in the Real RGB arrangement, if two adjacent G sub-pixel dark pixels are detected, the complementary color sub-pixel corresponding to the dark pixel in the odd row may select the R sub-pixel in the B sub-pixel column on the right, while the dark pixel in the even row selects the B sub-pixel in the R sub-pixel column on the left.

[0113] In some embodiments, a time-sharing driving strategy may be used to compensate for a double-dark pixel scenario, wherein a compensation voltage is applied to a first target compensation pixel during an odd-numbered scanning cycle, and a second target compensation pixel is adjusted during an even-numbered scanning cycle.

[0114] This application establishes spatially isolated compensation paths through an even-odd row distinction mechanism, effectively preventing mutual interference of compensation signals. Furthermore, by selecting differentiated complementary-color sub-pixels for dark pixels in different row positions, it better adapts to the physical structural characteristics of the Real RGB arrangement.

[0115] Through the above technical solution, the present application can effectively solve the problem of complex color cast caused by adjacent double dark pixels in the column direction. By establishing a compensation mechanism that is divided into zones and timed, the color cast perception of the adjacent dark pixel area is significantly reduced while maintaining the overall brightness uniformity of the panel. In some embodiments, the grayscale compensation of the target compensation pixel to reduce the display brightness of the target compensation pixel includes:

[0116] Grayscale compensation is performed using different grayscale compensation algorithms for the first target compensation pixel point and the second target compensation pixel point respectively.

[0117] Among them, different grayscale compensation algorithms can select corresponding compensation parameters based on the position difference of the target compensation pixel points, and can be implemented specifically by adjusting the compensation coefficient based on the row and column coordinates of the dark pixel points. For example, the dark pixels in odd rows and even rows correspond to different compensation coefficient calculation logics. The first target compensation pixel point can be a complementary color sub-pixel adjacent to the dark pixel point in the odd row, which can be specifically determined by the complementary color mapping rule, for example, a red dark pixel point corresponds to a green or blue compensation pixel point. The second target compensation pixel point can be a complementary color sub-pixel adjacent to the dark pixel point in the even row, which can be specifically determined by the complementary color mapping rule, for example, a green dark pixel point corresponds to a red or blue compensation pixel point.

[0118] Specifically, when two adjacent dark pixels are detected in the column direction, they are classified according to the parity of their row coordinates. For dark pixels in odd rows, adjacent complementary color sub-pixels are selected as the first compensation target, and their grayscale values ​​are adjusted using the first compensation algorithm. For dark pixels in even rows, adjacent complementary color sub-pixels are selected as the second compensation target, and their grayscale values ​​are adjusted using the second compensation algorithm. The two compensation algorithms independently calculate compensation coefficients based on the degree of brightness deviation of the corresponding dark pixels. For example, the first compensation algorithm uses a linear compensation model, while the second compensation algorithm uses a nonlinear compensation model, thereby adapting to the differences in the impact of dark pixels in different positions on surrounding pixels.

[0119] This application distinguishes between compensation algorithms for dark pixels in odd and even rows, and can accurately match the influence weights of dark pixels in different positions on complementary color sub-pixels. For example, dark pixels in odd rows may produce greater brightness attenuation due to differences in the driving circuit layout, and a higher intensity compensation coefficient is required. Dark pixels in even rows require a gradient compensation method due to different optical crosstalk ranges, thereby reducing the significance of color dots while maintaining display uniformity.

[0120] Through the above technical solution, the present application effectively solves the problem of inconsistent compensation effects of adjacent dark pixels in the column direction due to a single compensation strategy. Through a differentiated compensation algorithm, the brightness adjustment of adjacent dark pixel areas is more in line with the actual optical characteristics, significantly reducing the visual perception intensity of dark pixel color points under the white screen, while avoiding local brightness anomalies caused by over-compensation.

[0121] In some embodiments, performing grayscale compensation on the first target compensation pixel and the second target compensation pixel using different grayscale compensation algorithms includes:

[0122] Obtaining a first initial grayscale value of the first target compensation pixel and a second initial grayscale value of the second target compensation pixel;

[0123] performing grayscale compensation on the first target compensation pixel according to a first grayscale compensation coefficient and the first initial grayscale value to obtain a first target grayscale value; the first grayscale compensation coefficient is determined according to the brightness of the first dark pixel, the first target white brightness, and the first initial grayscale value; at the first target grayscale value, the brightness of the first target compensation pixel after grayscale compensation is less than or equal to a preset brightness;

[0124] Grayscale compensation is performed on the second target compensation pixel point according to the second grayscale compensation coefficient and the second initial grayscale value to obtain a second target grayscale value; the second grayscale compensation coefficient is determined according to the brightness of the second dark pixel point, the second target white brightness and the second initial grayscale value; at the second target grayscale value, the brightness of the second target compensation pixel point after grayscale compensation is less than or equal to the preset brightness.

[0125] Among them, the first initial grayscale value can be the original brightness control parameter of the first target compensation pixel before compensation, which can be achieved by reading the pixel drive data stored in the display driver chip. This parameter is directly related to the actual luminous intensity of the sub-pixel. The first grayscale compensation coefficient can be a proportional factor used to adjust the brightness change of the target compensation pixel. Specifically, it can be derived by calculating the difference between the brightness value of the dark pixel and the target white brightness and combining it with the nonlinear relationship of the initial grayscale value. This coefficient can dynamically balance the brightness compensation amplitude and the overall display uniformity. The first target white brightness can be the brightness reference value that the display panel expects to achieve under a standard white screen. Specifically, it can be determined by a preset gamma curve or actual measured data from an industrial camera. This parameter provides a normalized benchmark for grayscale compensation.

[0126] Specifically, when a dark pixel is detected, the current driving data of its adjacent first target compensation pixel is first obtained as the first initial grayscale value. Subsequently, based on the degree of deviation between the brightness of the dark pixel and the target white brightness, combined with the numerical range of the first initial grayscale value, the first grayscale compensation coefficient is calculated by a preset compensation algorithm. For example, when the brightness of the dark pixel deviates from the target white brightness by more than a threshold, the grayscale compensation coefficient will increase according to an exponential function relationship, thereby applying a higher grayscale attenuation to the target compensation pixel. Finally, by multiplying or superimposing the first initial grayscale value and the first grayscale compensation coefficient, a first target grayscale value is generated and written into the display drive circuit, so that the brightness of the compensated sub-pixel is limited to the preset brightness range, avoiding new brightness anomalies caused by over-compensation.

[0127] Among them, the second initial grayscale value can be the original brightness control parameter of the second target compensation pixel before compensation, which can be achieved by reading the pixel drive data stored in the display driver chip. This parameter is directly related to the actual luminous intensity of the sub-pixel. The second grayscale compensation coefficient can be a proportional factor used to adjust the brightness change of the target compensation pixel. Specifically, it can be derived by calculating the difference between the brightness value of the dark pixel and the target white brightness and combining it with the nonlinear relationship of the initial grayscale value. This coefficient can dynamically balance the brightness compensation amplitude and the overall display uniformity. The second target white brightness can be the brightness reference value that the display panel expects to achieve under a standard white screen. Specifically, it can be determined by a preset gamma curve or actual measured data from an industrial camera. This parameter provides a normalized benchmark for grayscale compensation.

[0128] Specifically, when a dark pixel is detected, the current driving data of its adjacent second target compensation pixel is first obtained as the second initial grayscale value. Subsequently, based on the degree of deviation between the brightness of the dark pixel and the target white brightness, combined with the numerical range of the second initial grayscale value, the second grayscale compensation coefficient is calculated by a preset compensation algorithm. For example, when the brightness of the dark pixel deviates from the target white brightness by more than a threshold, the grayscale compensation coefficient will increase according to an exponential function relationship, thereby applying a higher grayscale attenuation to the target compensation pixel. Finally, by multiplying or superimposing the second initial grayscale value and the second grayscale compensation coefficient, a second target grayscale value is generated and written into the display drive circuit, so that the brightness of the compensated sub-pixel is limited to the preset brightness range, avoiding new brightness anomalies caused by over-compensation.

[0129] By introducing a dynamically calculated grayscale compensation coefficient, this application can adaptively adjust the brightness of dark pixels based on the real-time relationship between the brightness deviation of the target white brightness, maintaining the consistency of the overall brightness of the panel while ensuring compensation accuracy. This effectively suppresses the color cast caused by dark pixels. By precisely controlling the brightness attenuation of the target compensation pixel, the dark pixel area appears close to neutral gray on a white screen, significantly reducing the human eye's perception of color dots while avoiding the local brightness distortion caused by traditional fixed compensation methods.

[0130] In some embodiments, the method further includes obtaining a demura compensation value of the target compensation pixel point, and performing demura compensation on the target compensation pixel point after grayscale compensation according to the demura compensation value.

[0131] For example, different compensation values ​​can be set for different brightness levels and grayscales. These values ​​are stored in registers on the display panel. During actual display, the Tcon IC reads these compensation values ​​from the registers and overlays them on the original image brightness to achieve real-time image compensation. This dynamic compensation mechanism adapts to different display content and brightness conditions, providing a more consistent and natural visual experience.

[0132] like Figure 8 As shown, Figure 8This is a schematic diagram of a display compensation device according to an embodiment of the present application. The embodiment of the present application provides a display compensation device, applied to a display panel, comprising a plurality of pixel units, each pixel unit comprising a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The sub-pixels in each pixel unit are arranged in an array to form a plurality of sub-pixel columns. Of two adjacent sub-pixel columns, one sub-pixel column comprises red sub-pixels and green sub-pixels arranged alternately in a column direction, and the other sub-pixel column comprises a plurality of blue sub-pixels. The device comprises:

[0133] a detection unit, configured to perform dark pixel detection on the display panel to obtain dark pixels of the display panel, wherein the dark pixels include at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel;

[0134] a determining unit, configured to determine, for each of the dark pixels, a target compensation pixel according to the dark pixel;

[0135] The compensation unit is configured to perform grayscale compensation on the target compensation pixel to reduce the display brightness of the target compensation pixel. The detection unit, the determination unit, and the compensation unit can be respectively configured to execute steps S1-S3 of the aforementioned embodiment. Details of these functional units can be found in the specific contents of the aforementioned method embodiment and will not be repeated here.

[0136] Embodiments of the present application provide a display compensation device that is communicatively coupled to a display panel. The display compensation device is configured to obtain compensation data based on a corresponding compensation algorithm and write the compensation data into a register of the display panel to perform display compensation on the display panel. Details regarding the display compensation method executed by the display compensation device can be found in the details of the aforementioned embodiments and are not further elaborated here.

[0137] The above is a detailed introduction to the display compensation method, device and equipment provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display compensation method, applied to a display panel, the display panel comprising a plurality of pixel units, each pixel unit comprising a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the sub-pixels in each pixel unit being arranged in an array to form a plurality of sub-pixel columns, wherein one of two adjacent sub-pixel columns comprises red sub-pixels and green sub-pixels arranged alternately in a column direction, and the other sub-pixel column comprises a plurality of blue sub-pixels, characterized in that: The method comprises: Performing dark pixel detection on the display panel to obtain dark pixel points of the display panel, wherein the dark pixel points include at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel; For each of the dark pixels, determining a target compensation pixel according to the dark pixel, wherein the target compensation pixel is a sub-pixel of a complementary color adjacent to the dark pixel; Grayscale compensation is performed on the target compensation pixel point to reduce the display brightness of the target compensation pixel point.

2. The display compensation method according to claim 1, wherein: The detecting dark pixels of the display panel to obtain dark pixels of the display panel includes: For a plurality of set sampling pixel points, obtaining a brightness value of each of the sampling pixel points of the display panel at a preset grayscale; Determining whether the brightness value falls within a preset dark pixel detection threshold range; When the brightness value falls within the dark pixel detection threshold range, the sampling pixel corresponding to the brightness value is determined to be the dark pixel.

3. The display compensation method according to claim 2, wherein: The sampling pixel point is the green sub-pixel.

4. The display compensation method according to claim 2, wherein: The preset grayscale includes at least two target grayscales; The obtaining of the brightness value of each sampling pixel point of the display panel at a preset grayscale includes: When the display panel is in a lighted state, controlling the display panel to sequentially display the grayscale image corresponding to each target grayscale; For each of the sampling pixel points, an average brightness value of the sampling pixel point in a plurality of grayscale images corresponding to each of the target grayscales is obtained as the brightness value of the sampling pixel point at the preset grayscale.

5. The display compensation method according to claim 1, wherein: The step of determining a target compensation pixel point for each dark pixel point according to the dark pixel point includes: For each of the dark pixels, determining the row and column coordinates of the dark pixel and the type of the dark pixel; According to the row and column coordinates of the dark pixel and the type of the dark pixel, a complementary color sub-pixel adjacent to the dark pixel is determined as the target compensation pixel.

6. The display compensation method according to claim 5, wherein: The step of determining, based on the row and column coordinates of the dark pixel and the type of the dark pixel, a complementary color sub-pixel adjacent to the dark pixel as the target compensation pixel includes: When the color type of the dark pixel is a first color, determining that the complementary color sub-pixel is a second color according to the row and column coordinates of the dark pixel and the first color; the first color is any one of red, green, and blue; and the second color is any color among the red, green, and blue except the first color; The sub-pixel of the second color is determined as the target compensation pixel point.

7. The display compensation method according to any one of claims 1 to 6, characterized in that: The performing grayscale compensation on the target compensation pixel point to reduce the display brightness of the target compensation pixel point includes: Obtaining an initial grayscale value of the target compensation pixel; Grayscale compensation is performed on the target compensation pixel point according to the grayscale compensation coefficient and the initial grayscale value to obtain a target grayscale value; the grayscale compensation coefficient is determined according to the brightness of the dark pixel point, the target white brightness and the initial grayscale value; at the target grayscale value, the brightness of the target compensation pixel point after grayscale compensation is less than or equal to the preset brightness.

8. The display compensation method according to any one of claims 1 to 6, characterized in that: The method further comprises: Determining whether there are two target dark pixel points adjacent to each other in a column direction among the plurality of dark pixel points; If there are two adjacent target dark pixels in the column direction, the target dark pixel located in an odd row of the two adjacent target dark pixels is defined as a first target dark pixel, and the target dark pixel located in an even row is defined as a second target dark pixel; A first complementary color sub-pixel adjacent to the first target dark pixel is used as a first target compensation pixel, and a second complementary color sub-pixel adjacent to the second target dark pixel is used as a second target compensation pixel.

9. The display compensation method according to claim 8, wherein: The performing grayscale compensation on the target compensation pixel point to reduce the display brightness of the target compensation pixel point includes: Grayscale compensation is performed using different grayscale compensation algorithms for the first target compensation pixel point and the second target compensation pixel point respectively.

10. The display compensation method according to claim 9, wherein: The grayscale compensation is performed using different grayscale compensation algorithms for the first target compensation pixel point and the second target compensation pixel point, respectively, including: Obtaining a first initial grayscale value of the first target compensation pixel and a second initial grayscale value of the second target compensation pixel; performing grayscale compensation on the first target compensation pixel according to a first grayscale compensation coefficient and the first initial grayscale value to obtain a first target grayscale value; the first grayscale compensation coefficient is determined according to the brightness of the first dark pixel, the first target white brightness, and the first initial grayscale value; at the first target grayscale value, the brightness of the first target compensation pixel after grayscale compensation is less than or equal to a preset brightness; Grayscale compensation is performed on the second target compensation pixel point according to the second grayscale compensation coefficient and the second initial grayscale value to obtain a second target grayscale value; the second grayscale compensation coefficient is determined according to the brightness of the second dark pixel point, the second target white brightness and the second initial grayscale value; at the second target grayscale value, the brightness of the second target compensation pixel point after grayscale compensation is less than or equal to the preset brightness.

11. The display compensation method according to any one of claims 1 to 6, characterized in that: The method further includes obtaining a demura compensation value of the target compensation pixel point, and performing demura compensation on the target compensation pixel point after grayscale compensation according to the demura compensation value.

12. A display compensation device, applied to a display panel, the display panel comprising a plurality of pixel units, each pixel unit comprising a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the sub-pixels in each pixel unit being arranged in an array to form a plurality of sub-pixel columns, wherein one of two adjacent sub-pixel columns comprises the red sub-pixels and the green sub-pixels arranged alternately in a column direction, and the other sub-pixel column comprises a plurality of blue sub-pixels, characterized in that: The device comprises: a detection unit, configured to perform dark pixel detection on the display panel to obtain dark pixels of the display panel, wherein the dark pixels include at least one of the red sub-pixel, the green sub-pixel, and the blue sub-pixel; a determination unit, configured to determine, for each of the dark pixels, a target compensation pixel according to the dark pixel; the target compensation pixel being a sub-pixel of a complementary color adjacent to the dark pixel; The compensation unit is used to perform grayscale compensation on the target compensation pixel point to reduce the display brightness of the target compensation pixel point.

13. A display compensation device, communicatively connected to a display panel, characterized in that: The display compensation device is used to obtain compensation data according to a corresponding compensation algorithm, and write the compensation data into a register of a display panel to perform display compensation on the display panel.

Images