Brightness compensation method of display panel, display panel and display device

Abstract

The embodiment of the invention provides a brightness compensation method of a display panel, the display panel and a display device. According to the method, the display panel comprises a first area; the method comprises the steps of executing a first step on the basis that a target pixel is located in a first area; the first step comprises the steps of determining a row compensation coefficient corresponding to the position of a target pixel and a corresponding column compensation coefficient; obtaining a display brightness compensation value of the target pixel based on the row compensation coefficient corresponding to the position of the target pixel and the corresponding column compensation coefficient; and performing brightness compensation on the target pixel based on the display brightness compensation value of the target pixel. According to the embodiment of the invention, the uniformity of the display brightness of the display panel can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of displays, and in particular, to a method for compensating the brightness of a display panel, a display panel, and a display device. Background Art

[0002] When a display panel is displaying, due to the limitations of its production process, the display brightness will be uneven, for example, vertical mura will occur. These vertical mura will cause discomfort to viewers. To solve this problem, the display brightness of the display panel is compensated. However, in related brightness compensation methods, over-compensation or under-compensation will occur after compensation, and the compensation effect is not ideal.

[0003] Therefore, there is an urgent need for a method for compensating the brightness of a display panel so that the display brightness of the display panel has good uniformity during the display process. Summary of the Invention

[0004] In view of this, the present application provides a method for compensating the brightness of a display panel, a display panel, and a display device, aiming to improve the good uniformity of the display brightness of the display panel during the display process.

[0005] In a first aspect, an embodiment of the present application provides a method for compensating the brightness of a display panel, where the display panel includes a first region; the method includes: Performing a first step based on the target pixel being located in the first region; The first step includes: Determining a row compensation coefficient and a corresponding column compensation coefficient corresponding to the position of the target pixel; Obtaining a display brightness compensation value of the target pixel based on the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel; Compensating the brightness of the target pixel based on the display brightness compensation value of the target pixel.

[0006] In a possible implementation manner of the first aspect, obtaining the display brightness compensation value of the target pixel based on the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel includes: Determining a compensation reference value corresponding to the target pixel; Taking the product of the compensation reference value corresponding to the target pixel, the row compensation corresponding to the position of the target pixel, and the corresponding column compensation coefficient as the display brightness compensation value of the target pixel.

[0007] In a possible implementation manner of the first aspect, the row compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the row information of the target pixel; and / or, the column compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the column information of the target pixel.

[0008] In a possible implementation of the first aspect, when the display panel is at the same DBV value, the row compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the gray level value; and / or, when the display panel is at the same DBV value, the column compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the gray level value.

[0009] In a possible implementation of the first aspect, when at the same gray level value, the row compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the DBV value; and / or, when at the same gray level value, the column compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the DBV value.

[0010] In a possible implementation of the first aspect, determining the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel includes: Determining the region information of the region to which the target pixel belongs, and obtaining the DBV value of the display panel and the gray level value of the target pixel; According to the preset correspondence between the row compensation coefficient and the region, and based on the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel, obtaining the row compensation coefficient corresponding to the target pixel; According to the preset correspondence between the column compensation coefficient and the region, and based on the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel, obtaining the column compensation coefficient corresponding to the target pixel.

[0011] In a possible implementation of the first aspect, determining the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel includes: Determining the row information and column information of the position where the target pixel is located, and obtaining the DBV value of the display panel and the gray level value of the target pixel; According to the preset correspondence between the row compensation coefficient and the row information, and based on the row information of the position where the target pixel is located, the DBV value of the display panel, and the gray level value of the target pixel, obtaining the row compensation coefficient corresponding to the target pixel; According to the preset correspondence between the column compensation coefficient and the column information, and based on the column information of the position where the target pixel is located, the DBV value of the display panel, and the gray level value of the target pixel, obtaining the column compensation coefficient corresponding to the target pixel.

[0012] In a possible implementation of the first aspect, the first region includes a first sub-region and a second sub-region. The first sub-region includes a first target pixel, and the second sub-region includes a second target pixel. When the display panel is at the same DBV value and the gray-scale values of the first target pixel unit and the second target pixel unit are the same, the row compensation coefficient corresponding to the first target pixel is different from the row compensation coefficient corresponding to the second target pixel, and / or the column compensation coefficient corresponding to the first target pixel is different from the column compensation coefficient corresponding to the second target pixel.

[0013] In a possible implementation of the first aspect, the display panel includes a second region, and the method further includes: Performing a second step based on the target pixel being located in the second region; The second step includes: Determining a compensation coefficient corresponding to the target pixel based on the gray-scale value of the target pixel and the DBV value of the display panel; Obtaining a display brightness compensation value of the target pixel based on the compensation coefficient corresponding to the target pixel; Performing brightness compensation on the target pixel based on the display brightness compensation value of the target pixel.

[0014] In a second aspect, an embodiment of the present application provides a display panel, and the brightness compensation method of the display panel is the method according to any one of claims 1-9.

[0015] In a third aspect, an embodiment of the present application provides a display panel, including a display region, and the display region includes a first region; The working state of the display panel includes a first state, and the first region includes a plurality of target pixels. The display brightness compensation coefficient of the target pixel is related to the row coefficient and the column coefficient. The row coefficient is the row compensation coefficient corresponding to the row where the target pixel is located, and the column coefficient is the column compensation coefficient corresponding to the column where the target pixel is located.

[0016] In a possible implementation of the third aspect, the compensation coefficient of the display brightness of the target pixel is the product of the corresponding row coefficient and the corresponding column coefficient.

[0017] In a possible implementation of the third aspect, the plurality of target pixels in the first region include a first target pixel and a second target pixel. The row where the first target pixel is located is different from the row where the second target pixel is located, and / or the column where the first target pixel is located is different from the column where the second target pixel is located; When the display panel is at the same DBV value and the gray-scale values of the first target pixel and the second target pixel are equal, the row coefficient corresponding to the first target pixel is the same as the row coefficient corresponding to the second target pixel; and / or the column coefficient corresponding to the first target pixel is the same as the column coefficient corresponding to the second target pixel.

[0018] In a possible implementation of the third aspect, the first region includes a first sub-region and a second sub-region, the first sub-region includes a first target pixel, and the second sub-region includes a second target pixel; When the display panel is at the same DBV value and the gray scale values of the first target pixel and the second target pixel are equal, the row coefficients corresponding to the first target pixel and the row coefficients corresponding to the second target pixel are different; and / or, when the display panel is at the same DBV value and the gray scale values of the first target pixel and the second target pixel are equal, the column coefficients corresponding to the first target pixel and the column coefficients corresponding to the second target pixel are different.

[0019] In a possible implementation of the third aspect, the row compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the row information of the target pixel; and / or, the column compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the column information of the target pixel. The display panel further includes a second region; the brightness compensation coefficient of the pixels in the second region is independent of the row information of the pixel and independent of the column information of the pixel.

[0020] In a fourth aspect, an embodiment of the present application provides a display device, including the display panel provided in the third aspect described above.

[0021] In the brightness compensation method provided by the embodiment of the present application, since the brightness compensation value is related to the row coefficient and the column coefficient, a higher-precision brightness compensation value can be obtained by setting the row coefficient and the column coefficient, so that on-demand compensation can be performed for the first region, and finally the display brightness uniformity of the display panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 The display panel before performing display brightness compensation; Figure 2 Schematic diagram of the display panel after performing display brightness compensation based on the related art; Figure 3 Schematic diagram of a display panel provided by an embodiment of the present application; Figure 4 Schematic diagram of a display panel provided by an embodiment of the present application; Figure 5 Schematic diagram of the flow of a first step provided by an embodiment of the present application; Figure 6 A schematic diagram of the correspondence between the line compensation coefficient and the gray level value provided by the embodiment of the present application; Figure 7 A schematic diagram of the correspondence between the line compensation coefficient and the gray level value provided by the embodiment of the present application; Figure 8 A schematic diagram of the correspondence between the line compensation coefficient and the gray level value provided by the embodiment of the present application; Figure 9 A schematic diagram of the correspondence between the column compensation coefficient and the gray level value provided by the embodiment of the present application; Figure 10 A schematic diagram of the correspondence between the column compensation coefficient and the gray level value provided by the embodiment of the present application; Figure 11 A schematic diagram of the correspondence between the column compensation coefficient and the gray level value provided by the embodiment of the present application; Figure 12 A schematic diagram of the correspondence between the line compensation coefficient and the DBV value provided by the embodiment of the present application; Figure 13 A schematic diagram of the correspondence between the line compensation coefficient and the DBV value provided by the embodiment of the present application; Figure 14 A schematic diagram of the correspondence between the line compensation coefficient and the DBV value provided by the embodiment of the present application; Figure 15 A schematic diagram of the correspondence between the column compensation coefficient and the DBV value provided by the embodiment of the present application; Figure 16 A schematic diagram of the correspondence between the column compensation coefficient and the DBV value provided by the embodiment of the present application; Figure 17 A schematic diagram of the correspondence between the column compensation coefficient and the DBV value provided by the embodiment of the present application; Figure 18 A flowchart for determining the line compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel provided by the embodiment of the present application; Figure 19 A flowchart for determining the line compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel provided by the embodiment of the present application; Figure 20 A flowchart for obtaining the display brightness compensation value of the target pixel based on the line compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel provided by the embodiment of the present application; Figure 21 A flowchart for obtaining the display brightness compensation value of the target pixel based on the line compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel provided by the embodiment of the present application; Figure 22 A flowchart of a second step provided by an embodiment of the present application; Figure 23 A schematic diagram of a display device provided by an embodiment of the present application. Specific embodiments

[0024] To better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0028] After research, it is found that in the production process of the display panel, the reasons for the uneven display brightness in the vertical direction include: uneven contact between the electrode surface and the glass substrate, uneven thickness of the evaporation at the edge of the display panel and the middle part, etc. In the related art, in order to solve the uneven display brightness in the vertical direction caused by this process limitation, for example, as Figure 1 shown, the display brightness in the local area 101 is significantly lower than that in the remaining areas. In order to solve this problem, the display panel needs to be compensated for brightness. However, in the related brightness compensation methods, the brightness compensation value is for the entire range, that is, the compensation value or compensation coefficient is the same in the entire range. Therefore, the brightness compensation of this compensation method has uniformity, but this uniform compensation method cannot eliminate the uneven brightness caused by local unevenness, and ultimately results in the unevenness of the display brightness still existing. For example, as Figure 2 shown, after the display brightness compensation is performed, there is an over-compensation phenomenon in the local area 101, so that the display screen of the display panel 100 still has the problem of uneven display.

[0029] As Figure 3As shown in the figure, an embodiment of the present application provides a method for compensating the brightness of a display panel. The display panel 100 includes a display area AA and a non-display area NA. The display area AA includes a first area A1. The first area A1 may be an area where the display brightness uniformity of the entire display panel is significantly different after compensation based on the compensation solutions of related technologies or existing technologies. For example, in a possible implementation, the first area A1 is an area with over-compensation after compensation based on the compensation solutions in existing technologies or related technologies. By over-compensation, it means that the display brightness of this area is significantly higher than that of other areas; that is, the first area A1 may be Figure 1 or Figure 2 a local area 101 in Figure 1 or Figure 2 or Figure 3 shown. It should be noted that the first area A1 may have an irregular shape similar to the local area 101 shown in Figure 4 shown, or may have a regular shape as shown in Figure 3 and Figure 4 shown. It should also be noted that the shapes of the first area A1 in Figure 3 and Figure 4 are only illustrative and not specifically limited. That is, the shape of the first area A1 is based on an area where the display brightness uniformity in the actual use environment is significantly insufficient, and its specific shape can be any shape, which is not limited here.

[0030] The method for compensating the brightness of the display panel provided in this embodiment includes: Based on the target pixel being located in the first area A1, execute the first step S100.

[0031] The target pixel may be some pixels in the first area A1. The target pixel may be a specified pixel, such as at least one of a part of the red pixels in the first area A1, a part of the green pixels in the first area A1, and a part of the blue pixels in the first area A1. Or the target pixel may be all pixels of a specified color in the first area A1, such as at least one of the red pixels, blue pixels, and green pixels in the first area A1. In a possible implementation, the target pixel may also be all pixels in the first area A1.

[0032] The first step is used to compensate the display brightness of the target pixels in the first area. Therefore, through the first step, the display brightness of the target pixels in the first area can be compensated, so as to realize the display brightness compensation of the target pixels in the first area, and finally improve the display uniformity of the display panel.

[0033] As Figure 5 shown, the first step S100 includes: S110, determine the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel.

[0034] Within the first region of the display panel, the position information of the target pixel can be pre-burned into the display driver chip before leaving the factory. The position information of the target pixel can also be obtained based on the valid signals of the scan signal and the data signal. For example, the scan signal is a line-by-line scan or a column-by-column scan, and the scan signal is generated by cascading shift register circuits. Therefore, by combining the stage number of the shift register circuit corresponding to the target pixel circuit and the column / row information of the data line, the position information of the target pixel can be obtained.

[0035] In step S110, based on the DBV value of the display panel and the gray scale value of the target pixel (the initial gray scale value before brightness compensation using the brightness compensation method provided in the embodiments of the present application), after obtaining the position information of the target pixel, based on the preset correspondence between the position information and the row compensation coefficient, and the preset correspondence between the position information and the column compensation coefficient, the row compensation coefficient corresponding to the target pixel and the column compensation coefficient corresponding to the target pixel can be obtained by means of lookup or calculation.

[0036] In a possible implementation manner, the row compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the row information of the target pixel. And / or, the column compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the column information of the target pixel.

[0037] In this implementation manner, the row information of the target pixel is used to represent the row position where the target pixel is located, and the column information of the target pixel is used to represent the column position where the target pixel is located. It should be noted that in this implementation manner, the row information of the target pixel can be confirmed according to the accuracy of the row information. For example, if the accuracy of the row information is greater than or equal to two rows (for example, twenty rows), it means that the row information of the position where the target pixel is located can be the same as the row information of the pixel in the adjacent row. Similarly, the column information of the target pixel can be confirmed according to the accuracy of the column information. For example, if the accuracy of the column information is greater than or equal to two columns (for example, eighteen columns), it means that the column information of the position where the target pixel is located can be the same as the column information of the pixel in the adjacent column. For example, taking the accuracy of the row information as ten rows and the accuracy of the column information as ten columns, if the target pixel is located in the fifteenth row and the eighteenth column, the row information of the target pixel is 2, the column information is 2, and at the same time, the row information of the pixel located in the sixteenth row and the nineteenth column is also 2, and the column information is also 2.

[0038] As Figures 6 to 11 shown, in a possible implementation manner, when the display panel is under the same DBV value, the row compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the gray scale value. And / or, when the display panel is under the same DBV value, the column compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the gray scale value.

[0039] For example, when the display panel is at the same DBV value, the slope of the piecewise linear function of the row compensation coefficient corresponding to the target pixel with respect to the gray scale value can be non-zero or zero.

[0040] For example, as Figure 6 shown, the display panel includes a plurality of DBV nodes and a plurality of gray scale nodes. When the display panel is at the same DBV value, when the gray scale value of the target pixel is between two adjacent gray scale nodes, the row compensation coefficient corresponding to the target pixel is a linear interpolation of the row compensation coefficients corresponding to the two adjacent gray scale nodes. Or, as Figure 7 or Figure 8 shown, the row compensation coefficient corresponding to the target pixel is any one of the row compensation coefficients corresponding to the two adjacent gray scale nodes. Wherein, Figure 7 is the row compensation coefficient corresponding to the target pixel being the row compensation coefficient corresponding to the previous gray scale node; Figure 8 is the row compensation coefficient corresponding to the target pixel being the row compensation coefficient corresponding to the next gray scale node.

[0041] For example, when the display panel is at the same DBV value, the piecewise linear function of the column compensation coefficient corresponding to the target pixel with respect to the gray scale value.

[0042] For example, as Figure 9 shown, the display panel includes a plurality of DBV nodes and a plurality of gray scale nodes. When the display panel is at the same DBV value, when the gray scale value of the target pixel is between two adjacent gray scale nodes, the column compensation coefficient corresponding to the target pixel is a linear interpolation of the column compensation coefficients corresponding to the two adjacent gray scale nodes. Or, as Figure 10 or Figure 11 shown, the column compensation coefficient corresponding to the target pixel is any one of the column compensation coefficients corresponding to the two adjacent gray scale nodes. Wherein, Figure 10 is the column compensation coefficient corresponding to the target pixel being the column compensation coefficient corresponding to the previous gray scale node; Figure 11 is the row compensation coefficient corresponding to the target pixel being the column compensation coefficient corresponding to the next gray scale node.

[0043] As Figures 12 to 17 shown, in a possible implementation, at the same gray scale value, the row compensation coefficient of the row where the target pixel is located is a piecewise linear function with respect to the DBV value. And / or, at the same gray scale value, the column compensation coefficient of the pixels in the first region with respect to the DBV value is a piecewise linear function.

[0044] For example, as Figures 12 to 14 shown, when the display panel is at the same gray scale value, the slope of the piecewise linear function of the row compensation coefficient corresponding to the target pixel with respect to the DBV value can be non-zero or zero.

[0045] For example, asFigure 12 As shown, the display panel includes a plurality of DBV nodes and a plurality of gray-scale nodes. When the display panel is at the same gray-scale value, when the DBV value of the target pixel is between two adjacent DBV nodes, the row compensation coefficient corresponding to the target pixel is a linear interpolation of the row compensation coefficients corresponding to the two adjacent DBV nodes. Or, as Figure 13 Or Figure 14 shown, the row compensation coefficient corresponding to the target pixel is any one of the row compensation coefficients corresponding to two adjacent DBV nodes. Among them, in Figure 13 , the row compensation coefficient corresponding to the target pixel is the row compensation coefficient corresponding to the previous DBV node; in Figure 14 , the row compensation coefficient corresponding to the target pixel is the row compensation coefficient corresponding to the next DBV node.

[0046] For example, as Figures 15 to 17 when the display panel is at the same gray-scale value, the column compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the DBV value.

[0047] For example, as Figure 15 shown, the display panel includes a plurality of DBV nodes and a plurality of gray-scale nodes. When the display panel is at the same gray-scale value, when the DBV value of the target pixel is between two adjacent DBV nodes, the column compensation coefficient corresponding to the target pixel is a linear interpolation of the column compensation coefficients corresponding to the two adjacent DBV nodes. Or, as Figure 16 Or Figure 17 shown, the column compensation coefficient corresponding to the target pixel is any one of the column compensation coefficients corresponding to two adjacent DBV nodes. Among them, in Figure 16 , the column compensation coefficient corresponding to the target pixel is the column compensation coefficient corresponding to the previous DBV node; in Figure 17 , the column compensation coefficient corresponding to the target pixel is the column compensation coefficient corresponding to the next DBV node.

[0048] As Figure 18 shown, in a possible implementation manner, determining the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel includes: S111, determining the region information of the region to which the target pixel belongs, and obtaining the DBV value of the display panel and the gray-scale value of the target pixel.

[0049] In step S111, the region information of the region to which the target pixel belongs is determined based on the position of the target pixel. And obtain the DBV value of the display panel at the current moment and the initial gray-scale value of the target pixel. The initial gray-scale value refers to the gray-scale value before brightness compensation is performed according to the first step provided in the embodiments of the present application.

[0050] S112. Obtain the row compensation coefficient corresponding to the target pixel according to the correspondence between the preset row compensation coefficient and the region, and based on the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel.

[0051] In this implementation manner, the correspondence between the row compensation coefficient and the region further includes the correspondence between the row compensation coefficient and the DBV value, and the correspondence between the row compensation coefficient and the gray level value. Therefore, the row compensation coefficient is related to the region information, the DBV value, and the gray level value. Therefore, after obtaining the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel, the row compensation coefficient corresponding to the target pixel can be obtained through the correspondence between the row compensation coefficient and the region. The correspondence between the row compensation coefficient and the region can be stored in the memory in the form of a graph, a table, or an array. Therefore, the row compensation coefficient corresponding to the target pixel can be obtained by looking up the table, the graph, or the array. Among them, the array can be a multi-dimensional coordinate, for example, (region information, DBV value, gray level value, row compensation coefficient).

[0052] S113. Obtain the column compensation coefficient corresponding to the target pixel according to the correspondence between the preset column compensation coefficient and the region, and based on the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel.

[0053] In this implementation manner, the correspondence between the column compensation coefficient and the region further includes the correspondence between the column compensation coefficient and the DBV value, and the correspondence between the column compensation coefficient and the gray level value. Therefore, the column compensation coefficient is related to the region information, the DBV value, and the gray level value. Therefore, after obtaining the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel, the column compensation coefficient corresponding to the target pixel can be obtained through the correspondence between the column compensation coefficient and the region. The correspondence between the column compensation coefficient and the region can be stored in the memory in the form of a graph, a table, or an array. Therefore, the column compensation coefficient corresponding to the target pixel can be obtained by looking up the table, the graph, or the array. Among them, the array can be a multi-dimensional coordinate, for example, (region information, DBV value, gray level value, column compensation coefficient).

[0054] As Figure 19 shown, in a possible implementation manner, determining the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel includes: S1101. Determine the row information and column information of the position where the target pixel is located, and obtain the DBV value of the display panel and the gray level value of the target pixel.

[0055] In step S1101, the row information and column information of the target pixel can be obtained based on the position of the target pixel. And the DBV value of the display panel at the current moment and the initial gray scale value of the target pixel are obtained. The initial gray scale value refers to the gray scale value before brightness compensation according to the first step provided in the embodiments of the present application.

[0056] S1102, according to the corresponding relationship between the preset row compensation coefficient and the row information, and based on the row information of the position where the target pixel is located, the DBV value of the display panel, and the gray scale value of the target pixel, obtain the row compensation coefficient corresponding to the target pixel.

[0057] In step S1102, the corresponding relationship between the row compensation coefficient and the row information further includes the corresponding relationship between the row compensation coefficient and the DBV value, and the corresponding relationship between the row compensation coefficient and the gray scale value. Therefore, the row compensation coefficient is related to the row information, the DBV value, and the gray scale value. Therefore, after obtaining the row information of the target pixel, the DBV value of the display panel, and the gray scale value of the target pixel, the row compensation coefficient corresponding to the target pixel can be obtained through the corresponding relationship between the row compensation coefficient and the row information. The corresponding relationship between the row compensation coefficient and the row information can be stored in the memory in the form of a graph, a table, or an array. Therefore, the row compensation coefficient corresponding to the target pixel can be obtained by looking up the table, the graph, or the array. Among them, the array can be a multi-dimensional coordinate, for example, (row information, DBV value, gray scale value, row compensation coefficient).

[0058] S1103, according to the corresponding relationship between the preset column compensation coefficient and the column information, and based on the column information of the position where the target pixel is located, the DBV value of the display panel, and the gray scale value of the target pixel, obtain the column compensation coefficient corresponding to the target pixel.

[0059] In step S1103, the corresponding relationship between the column compensation coefficient and the column information further includes the corresponding relationship between the column compensation coefficient and the DBV value, and the corresponding relationship between the column compensation coefficient and the gray scale value. Therefore, the column compensation coefficient is related to the column information, the DBV value, and the gray scale value. Therefore, after obtaining the column information of the target pixel, the DBV value of the display panel, and the gray scale value of the target pixel, the column compensation coefficient corresponding to the target pixel can be obtained through the corresponding relationship between the column compensation coefficient and the column information. The corresponding relationship between the column compensation coefficient and the column information can be stored in the memory in the form of a graph, a table, or an array. Therefore, the column compensation coefficient corresponding to the target pixel can be obtained by looking up the table, the graph, or the array. Among them, the array can be a multi-dimensional coordinate, for example, (column information, DBV value, gray scale value, column compensation coefficient).

[0060] S120, based on the row compensation coefficient and the column compensation coefficient corresponding to the position where the target pixel is located, obtain the display brightness compensation value of the target pixel.

[0061] In step S120, after obtaining the row compensation coefficient corresponding to the position of the target pixel and the column compensation coefficient corresponding to the position of the target pixel, the display brightness compensation value of the target pixel can be obtained by using the row compensation coefficient corresponding to the position of the target pixel and the corresponding column compensation coefficient through a preset calculation method.

[0062] As Figure 20 shown, in a possible implementation, obtaining the display brightness compensation value of the target pixel based on the row compensation coefficient corresponding to the position of the target pixel and the corresponding column compensation coefficient includes: S121, determining the compensation reference value corresponding to the target pixel.

[0063] In step S121, the compensation reference value corresponding to the target pixel can be obtained by looking up or reading the compensation reference value correspondence. Among them, the compensation reference value correspondence can be stored in the memory in the form of a table, diagram, or array, etc.

[0064] In a possible implementation, the compensation reference value can be related to at least one of the region, DBV value, and gray level value. That is, the compensation reference values corresponding to the pixels in different regions can be unequal, the compensation reference values corresponding to the same pixel under different DBV values can also be unequal, and the compensation reference values corresponding to the same pixel under different gray levels can also be unequal.

[0065] In a possible implementation, the compensation reference values corresponding to all the pixels in the display panel are the same. That is, the compensation reference value has nothing to do with the pixel region, DBV value, and gray level value.

[0066] S122, taking the product of the compensation reference value corresponding to the target pixel, the row compensation corresponding to the position of the target pixel, and the corresponding column compensation coefficient as the display brightness compensation value of the target pixel.

[0067] That is, the display brightness compensation value offset of the target pixel 补偿 satisfies: offset 补偿 = offset 基准 Gainrow Gaincolumn where offset 基准 is the compensation reference value, Gainrow is the row compensation coefficient, and Gaincolumn is the column compensation coefficient.

[0068] As Figure 21As shown, in a possible implementation, obtaining the display brightness compensation value of the target pixel based on the row compensation coefficient and the corresponding column compensation coefficient corresponding to the position of the target pixel includes: S1201. Determine the preliminary compensation value corresponding to the target pixel.

[0069] In step S1201, the preliminary compensation value corresponding to the target pixel may be the product of the compensation reference value corresponding to the target pixel unit and the initial compensation coefficient Gain. In a possible implementation, the initial compensation coefficient is not related to the row information and column information of the pixel position, and the initial compensation coefficient is related to the DBV value and the gray scale value.

[0070] In step S1201, the compensation reference value corresponding to the target pixel can be obtained by looking up or reading the compensation reference value correspondence. Among them, the compensation reference value correspondence can be stored in the memory in the form of a table, a diagram or an array, etc. After obtaining the compensation reference value, the product of it and the initial compensation coefficient Gain is used as the preliminary compensation value corresponding to the target pixel.

[0071] In a possible implementation, the compensation reference value may be related to at least one of the region, the DBV value, and the gray scale value. That is, the compensation reference values corresponding to the pixels in different regions may not be equal, the compensation reference values corresponding to the same pixel under different DBV values may not be equal, and the compensation reference values corresponding to the same pixel under different gray scale values may not be equal.

[0072] In a possible implementation, the compensation reference values corresponding to all the pixels in the display panel are the same. That is, the compensation reference value is not related to the pixel region, the DBV value, and the gray scale value.

[0073] S1202. Use the product of the preliminary compensation value corresponding to the target pixel, the row compensation corresponding to the position of the target pixel, and the corresponding column compensation coefficient as the display brightness compensation value of the target pixel.

[0074] That is, the display brightness compensation value offset of the target pixel 补偿 satisfies: offset 补偿 = offset 初步 Gainrow Gaincolumn where offset 初步 is the preliminary compensation value, Gainrow is the row compensation coefficient, and Gaincolumn is the column compensation coefficient; since offset 初步 = offset 基准 Gain, then: offset 补偿 = offset 基准 Gain Gainrow Gaincolumn wherein, offset 基准 is the compensation reference value, and Gain is the initial compensation coefficient.

[0075] In an embodiment of the present application, the first region includes a first sub-region and a second sub-region. The first sub-region includes a first target pixel, and the second sub-region includes a second target pixel. When the display panel is at the same DBV value and the gray-scale values of the first target pixel unit and the second target pixel unit are the same, the row compensation coefficient corresponding to the first target pixel is different from the row compensation coefficient corresponding to the second target pixel, and / or the column compensation coefficient corresponding to the first target pixel is different from the column compensation coefficient corresponding to the second target pixel.

[0076] In this embodiment, there are differences in the row compensation coefficients and column compensation coefficients between different sub-regions, so that differential compensation can be further realized. This differential compensation can further reduce the non-uniformity of the display brightness of the display panel, thereby improving the uniformity of the display brightness of the display panel.

[0077] S130. Perform brightness compensation on the target pixel based on the display brightness compensation value of the target pixel.

[0078] In step S130, compensating the display brightness of the display panel based on the display brightness compensation value of the target pixel may include: using the sum of the display brightness compensation value and the initial gray-scale value (i.e., the gray-scale value before display compensation using the display brightness compensation method provided in the embodiment of the present application) as the final gray-scale value, and outputting a data voltage according to the final gray-scale value.

[0079] Since the display brightness compensation value of the target pixel is related to its corresponding row compensation coefficient and column compensation coefficient, the display brightness compensation value of the target pixel is made more refined, thereby realizing more refined compensation for the display brightness of the target pixel and finally overcoming the problem of uneven local display brightness.

[0080] The display brightness compensation method provided by the embodiments of the present application can achieve more refined display brightness compensation for target pixels in the first region. Thus, it improves the problem of uneven display brightness caused by over-compensation in some regions due to the compensation scheme in the related art. By using the display brightness compensation method provided by the embodiments of the present application and adopting a 135-point optical verification to verify the uniformity of the display brightness of the display panel, it can be found that the uniformity of its display brightness is significantly improved. Therefore, using the display brightness compensation method provided by the embodiments of the present application can effectively improve the uniformity of the display brightness.

[0081] In an embodiment of the present application, the display panel 100 includes a second region A2, and the method further includes: based on the target pixel being located in the second region A2, performing a second step S200.

[0082] As Figure 22 shown, the second step S200 includes: S210, based on the gray scale value of the target pixel and the DBV value of the display panel, determining the compensation coefficient corresponding to the target pixel.

[0083] The compensation coefficient is the Gain value, and the compensation coefficient corresponding to the target pixel can be obtained through the corresponding relationship between the compensation coefficient, the gray scale value, and the DBV value. The corresponding relationship between the compensation coefficient, the gray scale value, and the DBV value is used to characterize the corresponding relationship between the compensation coefficient and the gray scale value and the corresponding relationship between the compensation coefficient and the DBV value. This corresponding relationship can be stored in the memory in the form of a table, a graph, or an array, etc. In step S210, the compensation coefficient corresponding to the target pixel can be obtained by looking up the table, the graph, or the array, etc.

[0084] S220, based on the compensation coefficient corresponding to the target pixel, obtaining the display brightness compensation value of the target pixel.

[0085] In step S220, after obtaining the compensation coefficient corresponding to the target pixel, taking the product of the compensation coefficient corresponding to the target pixel and the compensation reference value as the display brightness compensation value of the target pixel. Among them, the determination method of the compensation reference value can refer to the foregoing embodiments and will not be elaborated here. It should be noted that in the second step S200, there is no strict execution order between determining the compensation reference value and determining the compensation coefficient corresponding to the target pixel, and the two can be executed simultaneously or separately. It is possible to first determine the compensation coefficient and then determine the compensation reference value, or first determine the compensation reference value and then determine the compensation coefficient.

[0086] S230, based on the display brightness compensation value of the target pixel, performing brightness compensation on the target pixel.

[0087] In step S230, compensating the display brightness of the display panel based on the display brightness compensation value of the target pixel may include: using the sum of the display brightness compensation value and the initial gray level value (i.e., the gray level value before display compensation using the display brightness compensation method provided in the embodiments of the present application) as the final gray level value, and outputting a data voltage according to the final gray level value.

[0088] Embodiments of the present application further provide a display panel, and the brightness compensation method of the display panel is the method provided in any of the foregoing embodiments.

[0089] In the embodiments of the present application, adopting the brightness compensation method provided in any of the foregoing embodiments for the brightness compensation method of the display panel can effectively improve the uniformity of the display brightness of the display panel.

[0090] As Figure 3 or Figure 4 shown, embodiments of the present application further provide a display panel 100, including a display area AA, and the display area AA includes a first area A1. The working state of the display panel 100 includes a first state, and the first area A1 includes a plurality of target pixels. The display brightness compensation coefficient of the target pixel is related to the row coefficient and the column coefficient. The row coefficient is the row compensation coefficient corresponding to the row where the target pixel is located, and the column coefficient is the column compensation coefficient corresponding to the column where the target pixel is located.

[0091] In the embodiments of the present application, the row compensation coefficient may be the row compensation coefficient provided in any of the foregoing embodiments, and the column compensation coefficient may be the column compensation coefficient provided in any of the foregoing embodiments, which will not be elaborated herein.

[0092] In the embodiments of the present application, the display brightness compensation coefficient of the target pixel is related to the row coefficient and the column coefficient. Therefore, by setting different row coefficients and column coefficients, different display brightness compensation coefficients can be obtained, so that different display brightness compensation values can be achieved, thereby achieving more precise and higher brightness compensation.

[0093] In an embodiment of the present application, the compensation coefficient of the display brightness of the target pixel is the product of the corresponding row coefficient and the corresponding column coefficient.

[0094] In the embodiments of the present application, the display brightness compensation value of the target pixel may satisfy: offset 补偿 = offset 基准 Gainrow Gaincolumn wherein, offset 基准 is the compensation reference value, Gainrow is the row coefficient (also referred to as the row compensation coefficient), and Gaincolumn is the column coefficient (also referred to as the column compensation coefficient).

[0095] In the embodiment of the present application, the display brightness compensation value offset of the target pixel 补偿 satisfies: offset 补偿 = offset 初步 Gainrow Gaincolumn wherein, offset 初步 is the preliminary compensation value, Gainrow is the row coefficient (also known as the row compensation coefficient), and Gaincolumn is the column coefficient (also known as the column compensation coefficient); since offset 初步 =offset 基准 Gain, then there is: offset 补偿 = offset 基准 Gain Gainrow Gaincolumn wherein, offset 基准 is the compensation reference value, and Gain is the initial compensation coefficient.

[0096] In a possible implementation manner, the compensation coefficient of the display brightness of the target pixel is the product of the corresponding initial compensation coefficient, the corresponding row coefficient, and the corresponding column coefficient.

[0097] That is, the compensation coefficient of the display brightness = Gain Gainrow Gaincolumn wherein, Gain is the initial compensation coefficient, Gainrow is the row coefficient (also known as the row compensation coefficient), and Gaincolumn is the column coefficient (also known as the column compensation coefficient).

[0098] The display brightness compensation value offset of the target pixel 补偿 satisfies: offset 补偿 = offset 基准 Gain Gainrow Gaincolumn wherein, offset 基准 is the compensation reference value.

[0099] In an embodiment of the present application, the multiple target pixels in the first region include a first target pixel and a second target pixel. The row where the first target pixel is located is different from the row where the second target pixel is located, and / or the column where the first target pixel is located is different from the column where the second target pixel is located.

[0100] When the display panel is at the same DBV value and the gray scale values of the first target pixel and the second target pixel are equal, the row coefficient corresponding to the first target pixel is the same as the row coefficient corresponding to the second target pixel. And / or, the column coefficient corresponding to the first target pixel is the same as the column coefficient corresponding to the second target pixel.

[0101] In this embodiment, the row coefficients corresponding to the first target pixel and the second target pixel are the same, and / or the column coefficients corresponding to the first target pixel and the second target pixel are the same, which is beneficial to saving memory and reducing the control difficulty.

[0102] In an embodiment of the present application, the first region includes a first sub-region and a second sub-region. The first sub-region includes the first target pixel, and the second sub-region includes the second target pixel.

[0103] In a possible implementation manner, the row coefficients corresponding to any two target pixels among the multiple target pixels in the first region are the same. And / or, the column coefficients corresponding to any two target pixels among the multiple target pixels in the first region are the same.

[0104] In this implementation manner, all the target pixels in the first region share the row coefficients and column coefficients, which can greatly save memory and reduce the control difficulty.

[0105] In an embodiment of the present application, when the display panel is at the same DBV value and the gray scale values of the first target pixel and the second target pixel are equal, the row coefficient corresponding to the first target pixel is different from the row coefficient corresponding to the second target pixel. And / or, when the display panel is at the same DBV value and the gray scale values of the first target pixel and the second target pixel are equal, the column coefficient corresponding to the first target pixel is different from the column coefficient corresponding to the second target pixel.

[0106] In this embodiment, the row coefficients corresponding to the first target pixel and the second target pixel of the display panel are different, and / or the column coefficients corresponding to the first target pixel and the second target pixel of the display panel are different, which can achieve differential compensation within the first region, so as to achieve more accurate differential compensation. Therefore, different display brightness compensations can be performed on different target pixels, and finally the display brightness of the overall display image of the display panel has uniformity.

[0107] In an embodiment of the present application, the row compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the row information of the target pixel. And / or, the column compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the column information of the target pixel. The display panel 100 further includes a second region A2. The brightness compensation coefficient of the pixels in the second region A2 is independent of the row information of the pixel and independent of the column information of the pixel.

[0108] The compensation coefficient of the pixels in the second region A2 is independent of the row information of the pixel. And the compensation coefficient of the pixels in the second region A2 is independent of the column information of the pixel. Therefore, there is a difference between the display brightness compensation coefficient of the pixels in the second region A2 and the display brightness compensation coefficient in the first region. Thus, it can be achieved that: brightness compensation is implemented according to the compensation coefficient in the second region A2, and compensation is performed according to the row coefficient and column coefficient in the first region A1, so that the display brightness compensation method in the first region A1 is inconsistent with the display brightness compensation method in the second region A2, and finally, the display brightness compensation for the first region A1 (such as the over-compensation region) is achieved to realize the uniformity of the display brightness of the display panel. Among them, the specific implementation manner of the display brightness compensation of the pixels in the second region A2 can refer to the foregoing embodiments and will not be elaborated herein.

[0109] As Figure 23 shown, an embodiment of the present application further provides a display device, including the display panel provided in any of the foregoing embodiments.

[0110] Using the display device provided in the embodiment of the present application, the display brightness of the display panel can have good uniformity.

Claims

1. A brightness compensation method for a display panel, characterized in that, The display panel includes a first region; the method includes: Based on the target pixel being located in the first region, perform a first step; The first step includes: Determine the row compensation coefficient and the corresponding column compensation coefficient corresponding to the location of the target pixel; Based on the row compensation coefficient and the corresponding column compensation coefficient corresponding to the location of the target pixel, obtain the display brightness compensation value of the target pixel; Based on the display brightness compensation value of the target pixel, perform brightness compensation on the target pixel.

2. The method according to claim 1, wherein Obtaining the display brightness compensation value of the target pixel based on the row compensation coefficient and the corresponding column compensation coefficient corresponding to the location of the target pixel includes: Determine the compensation reference value corresponding to the target pixel; Use the product of the compensation reference value corresponding to the target pixel, the row compensation corresponding to the location of the target pixel, and the corresponding column compensation coefficient as the display brightness compensation value of the target pixel.

3. The method according to claim 1, characterized in that The row compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray level value of the target pixel, and the row information of the target pixel; And / or, the column compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray level value of the target pixel, and the column information of the target pixel.

4. The method according to claim 3, characterized in that, When the display panel is under the same DBV value, the row compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the gray level value; and / or, when the display panel is under the same DBV value, the column compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the gray level value.

5. The method according to claim 3, characterized in that, When under the same gray level value, the row compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the DBV value; and / or, when under the same gray level value, the column compensation coefficient corresponding to the target pixel is a piecewise linear function with respect to the DBV value.

6. The method according to claim 1, wherein Determining the row compensation coefficient and the corresponding column compensation coefficient corresponding to the location of the target pixel includes: Determine the region information of the region to which the target pixel belongs, and obtain the DBV value of the display panel and the gray level value of the target pixel; According to the preset correspondence between the row compensation coefficient and the region, and based on the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel, obtain the row compensation coefficient corresponding to the target pixel; According to the preset correspondence between the column compensation coefficient and the region, and based on the region information of the region to which the target pixel belongs, the DBV value of the display panel, and the gray level value of the target pixel, obtain the column compensation coefficient corresponding to the target pixel.

7. The method according to claim 1, wherein Determining the row compensation coefficient and the corresponding column compensation coefficient corresponding to the location of the target pixel includes: Determine the row information and column information of the location where the target pixel is located, and obtain the DBV value of the display panel and the gray level value of the target pixel; According to the preset correspondence between the row compensation coefficient and the row information, and based on the row information of the location where the target pixel is located, the DBV value of the display panel, and the gray level value of the target pixel, obtain the row compensation coefficient corresponding to the target pixel; Obtain the column compensation coefficient corresponding to the target pixel according to the correspondence between the preset column compensation coefficient and the column information, and based on the column information of the position where the target pixel is located, the DBV value of the display panel, and the gray scale value of the target pixel.

8. The method according to claim 1, wherein The first region includes a first sub-region and a second sub-region. The first sub-region includes a first target pixel, and the second sub-region includes a second target pixel. When the display panel is at the same DBV value and the gray scale values of the first target pixel unit and the second target pixel unit are the same, the row compensation coefficient corresponding to the first target pixel is different from the row compensation coefficient corresponding to the second target pixel, and / or the column compensation coefficient corresponding to the first target pixel is different from the column compensation coefficient corresponding to the second target pixel.

9. The method according to claim 1, wherein The display panel includes a second region, and the method further includes: Based on the target pixel being located in the second region, perform a second step; The second step includes: Determine the compensation coefficient corresponding to the target pixel based on the gray scale value of the target pixel and the DBV value of the display panel; Obtain the display brightness compensation value of the target pixel based on the compensation coefficient corresponding to the target pixel; Perform brightness compensation on the target pixel based on the display brightness compensation value of the target pixel.

10. A display panel, characterized in that, The brightness compensation method of the display panel is the method according to any one of claims 1-9.

11. A display panel, characterized in that, It includes a display area, and the display area includes a first area; The working state of the display panel includes a first state. The first region includes a plurality of target pixels. The display brightness compensation coefficient of the target pixel is related to the row coefficient and the column coefficient. The row coefficient is the row compensation coefficient corresponding to the row where the target pixel is located, and the column coefficient is the column compensation coefficient corresponding to the column where the target pixel is located.

12. The display panel according to claim 11, wherein The compensation coefficient of the display brightness of the target pixel is the product of the corresponding row coefficient and the corresponding column coefficient.

13. The display panel according to claim 11, wherein The plurality of target pixels in the first region include a first target pixel and a second target pixel. The row where the first target pixel is located is different from the row where the second target pixel is located, and / or the column where the first target pixel is located is different from the column where the second target pixel is located; When the display panel is at the same DBV value and the gray scale values of the first target pixel and the second target pixel are equal, the row coefficient corresponding to the first target pixel is the same as the row coefficient corresponding to the second target pixel; and / or the column coefficient corresponding to the first target pixel is the same as the column coefficient corresponding to the second target pixel.

14. The display panel according to claim 11, wherein The first region includes a first sub-region and a second sub-region. The first sub-region includes a first target pixel, and the second sub-region includes a second target pixel; When the display panel is at the same DBV value and the gray scale value of the first target pixel is equal to that of the second target pixel, the row coefficient corresponding to the first target pixel is different from the row coefficient corresponding to the second target pixel; and / or, when the display panel is at the same DBV value and the gray scale value of the first target pixel is equal to that of the second target pixel, the column coefficient corresponding to the first target pixel is different from the column coefficient corresponding to the second target pixel.

15. The display panel according to claim 11, characterized in that, The row compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the row information of the target pixel; and / or, the column compensation coefficient corresponding to the target pixel is related to the DBV value of the display panel, the gray scale value of the target pixel, and the column information of the target pixel. The display panel further includes a second region; The brightness compensation coefficient of the pixels in the second region is independent of the row information of the pixel and independent of the column information of the pixel.

16. A display device, characterized in that, Comprising the display panel according to any one of claims 10-15.

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