CN114882843B

CN114882843B - Method and device for compensating brightness of display panel and computer readable storage medium

Info

Publication number: CN114882843B
Application number: CN202210688756.4A
Authority: CN
Inventors: 张肖; 郭星灵; 谭小平; 朱修剑
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd; Hefei Visionox Technology Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd; Hefei Visionox Technology Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2023-07-14
Anticipated expiration: 2042-06-17
Also published as: CN114882843A

Abstract

Embodiments of the present application provide a brightness compensation method and apparatus for a display panel, and a computer readable storage medium, where the method includes: acquiring actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales, wherein M is an integer greater than 1; determining target gray scales according to deviation results of actual brightness of a plurality of sub-display areas in the first color picture of the M gray scales and first target brightness corresponding to the M gray scales respectively, wherein the first target brightness is the target brightness of the first color sub-pixels; acquiring actual brightness of a plurality of sub-display areas when the display panel displays a second color picture of a target gray scale; and determining the corresponding data voltage compensation quantity of each sub-display area when the M gray scales are at least reached according to the actual brightness of the plurality of sub-display areas when the M gray scales are the first color picture and the actual brightness of the plurality of sub-display areas when the M gray scales are the second color picture. The embodiment of the application can reduce the time and cost spent by the DeMura process.

Description

Method and device for compensating brightness of display panel and computer readable storage medium

Technical Field

The present disclosure relates to display technologies, and in particular, to a brightness compensation method and apparatus for a display panel, and a computer readable storage medium.

Background

Due to manufacturing process limitations, the display panel may produce non-uniformity in the circuits at the sub-pixel level. Such non-uniformity is displayed as a whole or a part of display non-uniformity, which is in the form of blocks, sand, dots, etc., and is collectively called Mura (a phenomenon in which brightness of a display panel is non-uniform, causing various marks). Whereas Mura calibration for display panels is commonly referred to as DeMura.

However, the current DeMura process takes a long time and is costly as studied by the inventors of the present application.

Disclosure of Invention

The embodiment of the application provides a brightness compensation method and device for a display panel and a computer readable storage medium, which can reduce the time and cost spent in a DeMura process while ensuring the DeMura compensation effect.

In a first aspect, an embodiment of the present application provides a method for compensating brightness of a display panel, including: acquiring actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales, wherein M is an integer greater than 1; determining target gray scales according to deviation results of actual brightness of a plurality of sub-display areas in the first color picture of the M gray scales and first target brightness corresponding to the M gray scales respectively, wherein the first target brightness is the target brightness of the first color sub-pixels; acquiring actual brightness of a plurality of sub-display areas when the display panel displays a second color picture of a target gray scale; and determining the corresponding data voltage compensation quantity of each sub-display area when the M gray scales are at least reached according to the actual brightness of the plurality of sub-display areas when the M gray scales are the first color picture and the actual brightness of the plurality of sub-display areas when the M gray scales are the second color picture.

According to an embodiment of the first aspect of the present application, the method may further comprise: acquiring actual brightness of a plurality of sub-display areas when the display panel displays a third color picture of a target gray scale; determining a data voltage compensation amount corresponding to each sub-display area when the M gray scales are at least according to the actual brightness of the plurality of sub-display areas when the M gray scales are the first color picture and the actual brightness of the plurality of sub-display areas when the M gray scales are the second color picture, specifically comprising: determining data voltage compensation amounts corresponding to the sub-display areas in at least M gray scales according to the actual brightness of the sub-display areas in the first color picture of the M gray scales, the actual brightness of the sub-display areas in the second color picture of the target gray scales and the actual brightness of the sub-display areas in the third color picture of the target gray scales; the target gray levels comprise N gray levels, wherein N is smaller than M and is a positive integer.

In this way, on the one hand, the first color sub-pixels with larger brightness influence still adopt a plurality of first color pictures with different gray scales to perform DeMura compensation, so that a better DeMura compensation effect can be ensured. On the other hand, the second color sub-pixel with smaller brightness influence adopts a small amount of gray-scale second color pictures to perform DeMura compensation, and the third color sub-pixel with smaller brightness influence also adopts a small amount of gray-scale third color pictures to perform DeMura compensation, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and the time and cost spent in the DeMura process can be reduced.

According to any one of the foregoing embodiments of the first aspect of the present application, determining the target gray scale according to a deviation result of actual brightness of the plurality of sub-display areas in the first color picture of the M gray scales and the first target brightness corresponding to the M gray scales, may specifically include: for any ith gray level in the M gray levels, calculating standard deviation or variance of actual brightness of a plurality of sub-display areas in a first color picture of the ith gray level and first target brightness corresponding to the ith gray level; according to the sequence from big to small, the gray scales corresponding to Q standard deviations or variances before the sequence are used as target gray scales, and Q is less than or equal to M and is an integer.

In this way, by calculating the standard deviation or variance of the actual luminance of the sub-display area when the M gray scales are used for the first color pictures and the first target luminance corresponding to the M gray scales respectively, and selecting the gray scale with the larger standard deviation or variance as the target gray scale, the gray scale with the largest influence on the luminance or the gray scale with the serious mura degree can be accurately determined from the M gray scales, and then the demux compensation is performed on the gray scale with the serious mura degree, so that the number of pictures shot in the demux process can be reduced, the shooting time is shortened, and meanwhile, the better demux compensation effect can be ensured to a larger degree.

According to any of the foregoing embodiments of the first aspect of the present application, q=1.

In this way, the second color sub-pixel and/or the third color sub-pixel with smaller brightness influence only adopt one gray-scale second color picture and/or third color picture to perform DeMura compensation, so that the number of pictures shot in the DeMura process can be reduced to a greater extent, the shooting time is shortened, and the time and cost spent in the DeMura process are reduced to a greater extent.

According to any one of the foregoing embodiments of the first aspect of the present application, the standard deviation between the actual luminance of the plurality of sub-display areas and the first target luminance corresponding to the ith gray scale is calculated according to the following expression when the first color picture of the ith gray scale:

wherein σ represents the standard deviation, N represents the number of sub-display areas in the display panel, x _j Representing the actual brightness of the jth sub-display area at the time of the first color picture of the ith gray scale,

the first target brightness corresponding to the ith gray level is represented.

In this way, the standard deviation of the actual brightness of the sub-display area when the first color pictures of the M gray scales are calculated through the expression and the first target brightness corresponding to the M gray scales respectively, and the gray scale with the larger standard deviation is selected as the target gray scale, so that the gray scale with the largest influence on the brightness or the gray scale with serious mura degree can be accurately determined from the M gray scales, and then the DeMura compensation is performed on the gray scale with serious mura degree, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and meanwhile, the better DeMura compensation effect is ensured to a larger degree.

According to any one of the foregoing embodiments of the first aspect of the present application, the variances of the actual luminances of the plurality of sub-display areas in the first color picture of the ith gray scale and the first target luminance corresponding to the ith gray scale are calculated according to the following expression:

wherein s is ² Representing variance, N representsThe number of sub-display areas in the display panel, x ₁ 、x ₂ 、x ₃ And x _N The actual brightness of the 1 st sub-display area, the 2 nd sub-display area, the 3 rd sub-display area and the nth sub-display area when the first color picture of the ith gray scale is respectively represented,

the first target brightness corresponding to the ith gray level is represented.

In this way, the variance of the first target brightness of the sub-display area when the actual brightness of the first color picture of the M gray scales corresponds to the M gray scales is calculated through the expression, and the gray scale with the larger variance is selected as the target gray scale, so that the gray scale with the largest influence on the brightness or the gray scale with serious mura degree can be accurately determined from the M gray scales, and then the DeMura compensation is performed on the gray scale with serious mura degree, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and meanwhile, the better DeMura compensation effect is ensured to a larger degree.

According to any one of the foregoing embodiments of the first aspect of the present application, determining the data voltage compensation amount corresponding to each sub-display area when the M gray scales are at least M may specifically include: for any ith gray level in the M gray levels, calculating the difference value between the actual brightness of each sub-display area in the first color picture of the ith gray level and the first target brightness corresponding to the ith gray level to obtain the brightness difference of the sub-pixels of the first color in each sub-display area; determining the data voltage compensation quantity of the first color sub-pixels in each sub-display area in the ith gray scale according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the first color sub-pixels in each sub-display area; calculating the difference value between the actual brightness of each sub-display area and the second target brightness corresponding to the target gray scale when the second color picture of the target gray scale is displayed, so as to obtain the brightness difference of the second color sub-pixels in each sub-display area, wherein the second target brightness is the target brightness of the second color sub-pixels; determining the data voltage compensation quantity of the second color sub-pixels in each sub-display area when the target gray scale is performed according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the second color sub-pixels in each sub-display area; and taking the data voltage compensation quantity of the second color sub-pixels in each sub-display area in the target gray scale as the data voltage compensation quantity of the second color sub-pixels in each sub-display area in at least M gray scales.

In this way, for the second color sub-pixels with smaller brightness influence, the data voltage compensation amount of the second color sub-pixels in each sub-display area in the target gray scale is used as the data voltage compensation amount of the second color sub-pixels in each sub-display area in at least M gray scales, so that the number of second color pictures shot in the DeMura process can be reduced, the shooting time can be shortened, and the time and cost spent in the DeMura process can be reduced.

According to any one of the foregoing embodiments of the first aspect of the present application, before obtaining the actual brightness of the plurality of sub-display areas when the display panel displays the second color picture of the target gray scale, the method may further include: acquiring actual brightness of a plurality of sub-display areas when a display panel displays a red picture with preset gray scale and actual brightness of a plurality of sub-display areas when a blue picture with preset gray scale is displayed; calculating a first deviation result of actual brightness of a plurality of sub-display areas when a red picture with preset gray scale and second target brightness corresponding to the preset gray scale, wherein the second target brightness is the target brightness of a sub-pixel with a second color; calculating a second deviation result of the actual brightness of the plurality of sub-display areas when the blue picture with the preset gray scale and the third target brightness corresponding to the preset gray scale, wherein the third target brightness is the target brightness of the sub-pixel with the third color; when the first deviation result is greater than or equal to the second deviation result, determining that the red picture is a second color picture; and when the first deviation result is smaller than the second deviation result, determining that the blue picture is the second color picture.

In this way, by calculating the first deviation result of the red picture and the second deviation result of the blue picture and comparing the first deviation result with the second deviation result, the second color sub-pixel with larger influence on the brightness or the second color sub-pixel with larger influence on the mura degree can be accurately determined, and then the DeMura compensation is performed only on the first color sub-pixel with the largest influence on the brightness and the second color sub-pixel with larger influence on the brightness, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and meanwhile, the better DeMura compensation effect is ensured to a larger degree.

According to any of the foregoing embodiments of the first aspect of the present application, the first color screen may include a green screen, the second color screen may include any one of a red screen and a blue screen, and the target gray level may include M gray levels.

In this way, on the one hand, the first color sub-pixel still adopts the first color pictures with M different gray scales to perform DeMura compensation, and the second color sub-pixel still adopts the second color pictures with M different gray scales to perform DeMura compensation, so that a better DeMura compensation effect can be ensured. On the other hand, the third color picture of the third color sub-pixel with smaller influence on brightness is not acquired, namely, only the first color picture and the second color picture are shot, so that the number of pictures shot by the DeMura process can be reduced, the shooting time is shortened, and the time and the cost spent by the DeMura process can be reduced.

In a second aspect, an embodiment of the present application provides a brightness compensation device of a display panel, where a display area of the display panel includes a plurality of sub-display areas, the device includes: the first acquisition module is used for acquiring the actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales, wherein M is an integer greater than 1; the first determining module is used for determining target gray scales according to deviation results of actual brightness of a plurality of sub-display areas in the first color picture of the M gray scales and first target brightness corresponding to the M gray scales, wherein the first target brightness is the target brightness of the first color sub-pixels; the second acquisition module is used for acquiring the actual brightness of the plurality of sub-display areas when the display panel displays the second color picture of the target gray scale; the second determining module is used for determining the corresponding data voltage compensation quantity of each sub-display area when the M gray scales are at least M gray scales according to the actual brightness of the plurality of sub-display areas when the M gray scales are the first color picture and the actual brightness of the plurality of sub-display areas when the M gray scales are the second color picture.

In a third aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the brightness compensation method of a display panel as provided in the first aspect.

According to the brightness compensation method, the device and the computer-readable storage medium of the display panel, the actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales is obtained, and M is an integer larger than 1; determining target gray scales according to deviation results of actual brightness of a plurality of sub-display areas in the first color picture of the M gray scales and first target brightness corresponding to the M gray scales respectively, wherein the first target brightness is the target brightness of the first color sub-pixels; acquiring actual brightness of a plurality of sub-display areas when the display panel displays a second color picture of a target gray scale; and determining the corresponding data voltage compensation quantity of each sub-display area when the M gray scales are at least reached according to the actual brightness of the plurality of sub-display areas when the M gray scales are the first color picture and the actual brightness of the plurality of sub-display areas when the M gray scales are the second color picture. On the one hand, the first color sub-pixels with larger brightness influence still adopt a plurality of first color pictures with different gray scales to perform DeMura compensation, so that a better DeMura compensation effect can be ensured. On the other hand, the target gray level is determined by analyzing the brightness deviation results of the first color pictures of the M gray levels, the second color picture of the small target gray level is adopted for the second color sub-pixels with smaller brightness influence to perform DeMura compensation, and/or the third color picture of the third color sub-pixels with smaller brightness influence is not shot, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and the time and cost spent in the DeMura process can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present disclosure;

fig. 2 is a flowchart illustrating a brightness compensation method of a display panel according to an embodiment of the present disclosure;

FIG. 3 is a flowchart illustrating a step S102 in the brightness compensation method of the display panel shown in FIG. 2;

FIG. 4 is a flowchart illustrating the step S104 in the brightness compensation method of the display panel shown in FIG. 2;

fig. 5 is a schematic flow chart of another brightness compensation method of a display panel according to an embodiment of the present disclosure;

fig. 6 is a schematic flow chart of a brightness compensation method of a display panel according to an embodiment of the present disclosure;

fig. 7 is a schematic flow chart of a brightness compensation method of a display panel according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a brightness compensation device of a display panel according to an embodiment of the present disclosure;

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Before describing the technical solution provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically describes a problem existing in the prior art:

due to manufacturing process limitations, the display panel may produce non-uniformity in the circuits at the sub-pixel level. Such non-uniformity is displayed as a whole or a part of display non-uniformity, which is in the form of blocks, sand, dots, etc., and is collectively called Mura (a phenomenon in which brightness of a display panel is non-uniform, causing various marks). Currently, mura is one of the main factors limiting the production yield of display panels (e.g., OLED display panels). Whereas Mura calibration for display panels is commonly referred to as DeMura.

In the design of the DeMura algorithm, the accuracy of the front-end shooting brightness data greatly influences the compensation effect of the DeMura algorithm. Therefore, the photographed frames need to cover as much gray scale and mura patterns as possible to ensure the compensation effect, and 6 gray scale photographing of three colors of red, green and blue with low, medium and high brightness is generally selected, i.e. 18 frames are photographed in total. The time cost of such a large number of shots will also rise.

In view of the above-mentioned research of the inventor, the embodiments of the present application provide a method, an apparatus, and a computer-readable storage medium for compensating brightness of a display panel, which can solve the technical problems of long time and high cost of the DeMura process in the related art.

The technical conception of the embodiment of the application is as follows: on the one hand, the first color sub-pixel with larger brightness influence still adopts M first color pictures with different gray scales to perform DeMura compensation, so that a better DeMura compensation effect can be ensured. On the other hand, the target gray level is determined by analyzing the brightness deviation results of the first color pictures of the M gray levels, the second color picture of the small target gray level is adopted for the second color sub-pixels with smaller brightness influence to perform DeMura compensation, and/or the third color picture of the third color sub-pixels with smaller brightness influence is not shot, so that the number of pictures shot in the DeMura process is reduced, the shooting time is shortened, and the time and cost spent in the DeMura process are reduced.

The following first describes a brightness compensation method of a display panel provided in an embodiment of the present application.

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present application. As shown in fig. 1, the display area of the display panel 10 includes a plurality of sub-display areas a, each of which may include at least one sub-pixel.

Fig. 2 is a flowchart illustrating a brightness compensation method of a display panel according to an embodiment of the present application. As shown in fig. 2, the method may include the steps of:

s101, acquiring actual brightness of a plurality of sub-display areas when a display panel displays M first color pictures with different gray scales, wherein M is an integer greater than 1;

s102, determining target gray scales according to deviation results of actual brightness of a plurality of sub-display areas in a first color picture of M gray scales and first target brightness corresponding to the M gray scales respectively, wherein the first target brightness is the target brightness of a first color sub-pixel;

s103, acquiring actual brightness of a plurality of sub-display areas when the display panel displays a second color picture of a target gray scale;

s104, determining the corresponding data voltage compensation quantity of each sub-display area in at least M gray scales according to the actual brightness of the plurality of sub-display areas in the first color picture of the M gray scales and the actual brightness of the plurality of sub-display areas in the second color picture of the target gray scales.

The specific implementation of each of the above steps will be described in detail below.

According to the brightness compensation method for the display panel, the actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales is obtained, wherein M is an integer greater than 1; determining target gray scales according to deviation results of actual brightness of a plurality of sub-display areas in the first color picture of the M gray scales and first target brightness corresponding to the M gray scales respectively, wherein the first target brightness is the target brightness of the first color sub-pixels; acquiring actual brightness of a plurality of sub-display areas when the display panel displays a second color picture of a target gray scale; and determining the corresponding data voltage compensation quantity of each sub-display area when the M gray scales are at least reached according to the actual brightness of the plurality of sub-display areas when the M gray scales are the first color picture and the actual brightness of the plurality of sub-display areas when the M gray scales are the second color picture. On the one hand, the first color sub-pixel with larger brightness influence still adopts M first color pictures with different gray scales to perform DeMura compensation, so that a better DeMura compensation effect can be ensured. On the other hand, the target gray level is determined by analyzing the brightness deviation results of the first color pictures of the M gray levels, the second color picture of the small target gray level is adopted for the second color sub-pixels with smaller brightness influence to perform DeMura compensation, and/or the third color picture of the third color sub-pixels with smaller brightness influence is not shot, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and the time and cost spent in the DeMura process can be reduced.

A specific implementation of each of the above steps is described below.

First, S101 is introduced, the actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales is obtained, where M is an integer greater than 1.

The specific number of M may be flexibly adjusted according to practical situations, which is not limited in the embodiment of the present application. As described above, for example, M may be equal to 6. That is, in some examples, 6 different gray-scale first color pictures may be selected for DeMura compensation.

In S101, for any ith gray level of the M gray levels, the display panel may display the first color picture of the ith gray level, and then may collect actual brightness of the plurality of sub-display areas when the first color picture of the ith gray level is acquired by an optical measurement device such as a color analyzer. For example, the display area of the display panel 10 includes 100 sub-display areas a, and then the actual brightness of the 100 sub-display areas a may be collected by an optical measurement device. It is to be understood that the actual brightness of the 100 sub-display areas a may be different or partially the same at the same gray level, for example, the actual brightness of several sub-display areas a may be the same.

In the embodiment of the present application, the first color picture may be a picture corresponding to a first color sub-pixel having the greatest influence on brightness. The inventor of the application finds that the green duty ratio in white light is the highest, and the influence on human eye feeling is the greatest. Thus, the first color picture may be a green picture. When the green picture is displayed, for example, the other color sub-pixels except the green sub-pixel in the display panel can not emit light, and only the green sub-pixel emits light, so that the effect of displaying the green pure-color picture is achieved.

The above is a specific implementation of S101, and a specific implementation of S102 is described below.

S102, determining a target gray level according to deviation results of actual brightness of a plurality of sub-display areas in the first color picture of M gray levels and first target brightness corresponding to the M gray levels, wherein the first target brightness is the target brightness of the first color sub-pixel.

Wherein the target luminance (i.e., the first target luminance) corresponding to the first color sub-pixel at each gray level is known and may be predetermined. It is readily understood that the target brightness corresponding to the first color sub-pixel at different gray levels may be different, i.e., the target brightness changes with the gray level.

Fig. 3 is a flowchart illustrating a step S102 in the brightness compensation method of the display panel shown in fig. 2. As shown in fig. 3, S102 may optionally include the following steps S301 and S302, in particular, according to some embodiments of the present application.

S301, calculating standard deviation or variance of actual brightness of a plurality of sub-display areas in a first color picture of an ith gray scale and first target brightness corresponding to the ith gray scale for any ith gray scale in the M gray scales.

Assuming that the display area of the display panel 10 includes N sub-display areas, in S301, for any ith gray level of the M gray levels, a standard deviation or variance between actual luminance of the 1 st sub-display area to the nth sub-display area at the time of the first color picture of the ith gray level and the first target luminance corresponding to the ith gray level may be calculated.

S302, taking gray scales corresponding to Q standard deviations or variances before sequencing as target gray scales according to the sequencing from large to small, wherein Q is less than or equal to M and is an integer. That is, a gray level corresponding to a larger standard deviation or a larger variance is selected from the M gray levels as the target gray level. For example, when m=6, Q may be any one of 1 to 6.

In some specific embodiments, optionally, q=1. That is, a gray level corresponding to the maximum standard deviation or the maximum variance may be selected from the M gray levels as the target gray level.

In some specific embodiments, optionally, the target gray level may include M gray levels. For example, when m=6, q=6. It is readily understood that the display panel may also comprise a second color sub-pixel and a third color sub-pixel. In the DeMura compensation, the shooting of the third color picture with smaller influence on brightness can be removed, and finally only the first color picture with M gray scales and the second color picture with M gray scales are shot.

For ease of understanding, the following description will be given with reference to table 1 taking m=6 as an example.

TABLE 1

As can be seen from table 1, in the related art, 6 gray-scale shots of three colors of red, green and blue with low, medium and high brightness are required, that is, 18 pictures are shot in total, which takes 54 seconds. In some embodiments of the present application, only the first color image with 6 gray scales and the second color image with 6 gray scales need to be shot, which takes only 36 seconds, and the compensation effect is similar to that of the related art, so that the number of images shot by the DeMura process can be reduced, the shooting time is shortened, and the time and cost spent by the DeMura process can be reduced.

According to some embodiments of the present application, optionally, a standard deviation of actual luminance of the plurality of sub-display areas when the first color picture of the ith gray scale and the first target luminance corresponding to the ith gray scale may be calculated according to the following expression:

the first target brightness corresponding to the ith gray level is represented.

In this way, the standard deviation of the actual brightness of the sub-display area when the first color pictures of the M gray scales are calculated according to the expression (1) and the first target brightness corresponding to the M gray scales respectively are calculated, and the gray scale with the larger standard deviation is selected as the target gray scale, so that the gray scale with the largest influence on the brightness or the gray scale with the serious mura degree can be accurately determined from the M gray scales, and then the demux compensation is performed on the gray scale with the serious mura degree, so that the number of pictures shot in the demux process can be reduced, the shooting time is shortened, and meanwhile, the better demux compensation effect can be ensured to a larger degree.

According to some embodiments of the present application, alternatively, the variance of the actual luminance of the plurality of sub-display areas when the first color picture of the ith gray scale and the first target luminance corresponding to the ith gray scale may be calculated according to the following expression:

Wherein s is ² Representing variance, N represents the number of sub-display areas in the display panel, x ₁ 、x ₂ 、x ₃ And x _N The actual brightness of the 1 st sub-display area, the 2 nd sub-display area, the 3 rd sub-display area and the nth sub-display area when the first color picture of the ith gray scale is respectively represented,

the first target brightness corresponding to the ith gray level is represented.

In this way, the variance of the first target brightness of the sub-display area when the actual brightness of the first color picture of the M gray scales corresponds to the M gray scales is calculated by the expression (2), and the gray scale with the larger variance is selected as the target gray scale, so that the gray scale with the largest influence on the brightness or the gray scale with serious mura degree can be accurately determined from the M gray scales, and then the DeMura compensation is performed on the gray scale with serious mura degree, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and meanwhile, the better DeMura compensation effect can be ensured to a larger degree.

The above is a specific implementation of S102, and a specific implementation of S103 is described below.

S103, acquiring actual brightness of a plurality of sub-display areas when the display panel displays a second color picture of the target gray scale.

In S103, the display panel may display a second color picture of the target gray scale, and then may collect actual brightness of a plurality of sub-display areas when the second color picture of the target gray scale is collected by an optical measurement device such as a color analyzer.

The above is a specific implementation of S103, and a specific implementation of S104 is described below.

Fig. 4 is a flowchart illustrating a step S104 in the brightness compensation method of the display panel shown in fig. 2. As shown in fig. 4, S104 may optionally include the following steps S401 to S405, in particular, according to some embodiments of the present application.

S401, calculating the difference value between the actual brightness of each sub-display area and the first target brightness corresponding to the ith gray level when the first color picture of the ith gray level is calculated for any ith gray level in the M gray levels, and obtaining the brightness difference of the first color sub-pixels in each sub-display area.

As described above, when the display panel displays the first color picture of the ith gray scale, the actual brightness of each sub-display area can be acquired by the optical measurement device, and since only the first color sub-pixel emits light, the acquired actual brightness is the actual brightness of the first color sub-pixel in each sub-display area. Further, the first target luminance corresponding to the i-th gray level may be predetermined. Then, in S401, the actual brightness of each sub-display area at the ith gray level is different from the first target brightness corresponding to the ith gray level, so as to obtain the brightness difference of the sub-pixels of the first color in each sub-display area.

S402, determining the data voltage compensation quantity of the first color sub-pixels in each sub-display area in the ith gray scale according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the first color sub-pixels in each sub-display area.

Wherein the brightness is related to the data voltage, e.g. the brightness gradually decreases (i.e. inversely related) with increasing data voltage. Accordingly, a correspondence relationship between the luminance and the data voltage may be predetermined. For example, the correspondence between the brightness and the data voltage may be determined through a test, a historical data simulation, or a model training, which is not limited in the embodiments of the present application.

In S402, after the luminance difference of the first color sub-pixel in each sub-display area is obtained, the data voltage compensation amount corresponding to the luminance difference may be determined according to the predetermined correspondence between the luminance and the data voltage. Thus, the data voltage compensation amount of the first color sub-pixel in each sub-display area is obtained when M gray scales are generated.

It should be noted that, for other gray scales than M gray scales, for example, when m=6, for other 250 gray scales of 0 to 255 except for 6 binding points (gray scales), the data voltage compensation amount of the first color sub-pixel in each sub-display area in the M gray scales may be processed based on the linear interpolation algorithm, so as to obtain the data voltage compensation amount of the first color sub-pixel in each sub-display area in the other 250 gray scales.

S403, calculating the difference between the actual brightness of each sub-display area and the second target brightness corresponding to the target gray level when the second color picture of the target gray level is obtained, and obtaining the brightness difference of the second color sub-pixels in each sub-display area, wherein the second target brightness is the target brightness of the second color sub-pixels.

When the display panel displays the second color picture of the target gray scale, the actual brightness of each sub-display area can be acquired through the optical measurement device, and because only the second color sub-pixels emit light, the acquired actual brightness is the actual brightness of the second color sub-pixels in each sub-display area. In addition, the second target brightness corresponding to the second color sub-pixel at the target gray level may also be predetermined. Then, in S403, the actual brightness of each sub-display area at the target gray level is different from the corresponding second target brightness of the second color sub-pixel at the target gray level, so as to obtain the brightness difference of the second color sub-pixel in each sub-display area.

S404, determining the data voltage compensation amount of the second color sub-pixels in each sub-display area when the target gray scale is performed according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the second color sub-pixels in each sub-display area.

In S404, after the brightness difference of the second color sub-pixel in each sub-display area is obtained, the data voltage compensation amount corresponding to the brightness difference may be determined according to the predetermined correspondence between the brightness and the data voltage. Thus, the data voltage compensation quantity of the second color sub-pixels in each sub-display area is obtained when the target gray scale is obtained.

S405, the data voltage compensation quantity of the second color sub-pixels in each sub-display area in the target gray scale is used as the data voltage compensation quantity of the second color sub-pixels in each sub-display area in at least M gray scales. For example, when the target gray level has only one gray level, the data voltage compensation amount of the second color sub-pixel in each sub-display area at the target gray level can be directly used as the data voltage compensation amount of the second color sub-pixel in each sub-display area at the gray level of 0 to 255. When the target gray level has a plurality of gray levels, the data voltage compensation amount of the second color sub-pixels in each sub-display area in the target gray level can be processed based on a linear interpolation algorithm, so as to obtain the data voltage compensation amount of the second color sub-pixels in each sub-display area in other gray levels.

Fig. 5 is a schematic flow chart of another brightness compensation method of a display panel according to an embodiment of the present application. As shown in fig. 5, according to some embodiments of the present application, optionally, before the actual brightness of the plurality of sub-display areas when the display panel displays the second color picture of the target gray scale is acquired in S103, the method may further include the following steps S501 to S505.

S501, acquiring actual brightness of a plurality of sub-display areas when a display panel displays a red picture with preset gray scale and actual brightness of a plurality of sub-display areas when a blue picture with preset gray scale is displayed.

The preset gray level may be one gray level or may be a plurality of gray levels, and specifically may be flexibly adjusted according to actual situations, which is not limited in the embodiment of the present application. In S501, for example, the display panel displays a red frame with a preset gray level first, and then the actual brightness of a plurality of sub-display areas when the display panel displays the red frame with the preset gray level is collected by the optical measurement device. Then, the display panel displays a blue picture with preset gray scale, and the actual brightness of a plurality of sub-display areas when the display panel displays the blue picture with preset gray scale is acquired through the optical measurement equipment.

S502, calculating a first deviation result of actual brightness of a plurality of sub-display areas when a red picture with preset gray scale and second target brightness corresponding to the preset gray scale, wherein the second target brightness is the target brightness of a sub-pixel with the second color.

Wherein the first deviation result includes, but is not limited to, standard deviation or variance. In S502, for example, the standard deviation or variance of the actual luminance of the plurality of sub-display areas when calculating the red frame with the preset gray scale and the second target luminance corresponding to the preset gray scale may be the same as or similar to the above-mentioned expression (1) or the above-mentioned expression (2), and will not be described here.

S503, calculating a second deviation result of the actual brightness of the plurality of sub-display areas when the blue picture with the preset gray level and the third target brightness corresponding to the preset gray level, wherein the third target brightness is the target brightness of the sub-pixel with the third color.

Wherein the second deviation result includes, but is not limited to, standard deviation or variance. In S503, for example, the standard deviation or variance of the actual luminance of the plurality of sub-display areas when calculating the blue screen with the preset gray level and the third target luminance corresponding to the preset gray level may be the same as or similar to the above-mentioned expression (1) or the above-mentioned expression (2), and will not be described here.

S504, when the first deviation result is greater than or equal to the second deviation result, determining that the red picture is the second color picture.

S505, when the first deviation result is smaller than the second deviation result, determining that the blue picture is the second color picture.

For example, when the first deviation result and the second deviation result are both standard deviations, a screen having the largest standard deviation among the red screen and the blue screen is taken as the second color screen. For example, when the first deviation result and the second deviation result are both variances, the picture with the largest variance among the red picture and the blue picture is taken as the second color picture.

Fig. 6 is a flowchart of a brightness compensation method of a display panel according to an embodiment of the present application. In the embodiment shown in fig. 6, the target gray levels include N gray levels, N is smaller than M and N is a positive integer, i.e., the number of gray levels in the target gray levels is smaller than M. As shown in fig. 6, the method may further include the steps of:

s601, acquiring actual brightness of a plurality of sub-display areas when the display panel displays a third color picture of a target gray scale.

In S601, the display panel displays the third color image of the target gray scale, and the actual brightness of each sub-display area is acquired by the optical measurement device, and because only the third color sub-pixel emits light, the acquired actual brightness is the actual brightness of the third color sub-pixel in each sub-display area.

Correspondingly, S104, determining the data voltage compensation amount corresponding to each sub-display area when the M gray scales are at least M gray scales according to the actual brightness of the plurality of sub-display areas when the M gray scales are the first color picture and the actual brightness of the plurality of sub-display areas when the M gray scales are the second color picture, which specifically includes the following steps: and determining the corresponding data voltage compensation quantity of each sub-display area in at least M gray scales according to the actual brightness of the plurality of sub-display areas in the first color picture of the M gray scales, the actual brightness of the plurality of sub-display areas in the second color picture of the target gray scales and the actual brightness of the plurality of sub-display areas in the third color picture of the target gray scales.

Fig. 7 is a flowchart of a brightness compensation method of a display panel according to an embodiment of the present application. As shown in fig. 7, specifically, S104 may include the following steps S401 to S408.

S405, the data voltage compensation quantity of the second color sub-pixels in each sub-display area in the target gray scale is used as the data voltage compensation quantity of the second color sub-pixels in each sub-display area in at least M gray scales.

The above steps S401 to S405 are described in detail above, and are not described herein.

S406, calculating the difference value between the actual brightness of each sub-display area and the third target brightness corresponding to the target gray level when the third color picture of the target gray level is obtained, and obtaining the brightness difference of the third color sub-pixels in each sub-display area, wherein the third target brightness is the target brightness of the third color sub-pixels.

When the display panel displays the third color picture of the target gray scale, the actual brightness of each sub-display area can be acquired through the optical measurement device, and because only the third color sub-pixel emits light, the acquired actual brightness is the actual brightness of the third color sub-pixel in each sub-display area. In addition, a third target luminance corresponding to the third color sub-pixel at the target gray level may also be predetermined. Then, in S406, the actual brightness of each sub-display area at the target gray level is different from the corresponding third target brightness of the third color sub-pixel at the target gray level, so as to obtain the brightness difference of the third color sub-pixel in each sub-display area.

S407, determining the data voltage compensation quantity of the third color sub-pixels in each sub-display area when the target gray scale is performed according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the third color sub-pixels in each sub-display area.

In S407, after the luminance difference of the third color sub-pixel in each sub-display area is obtained, the data voltage compensation amount corresponding to the luminance difference may be determined according to the predetermined correspondence between the luminance and the data voltage. Thus, the data voltage compensation amount of the third color sub-pixel in each sub-display area at the target gray scale is obtained.

S408, the data voltage compensation quantity of the third color sub-pixels in each sub-display area in the target gray scale is used as the data voltage compensation quantity of the third color sub-pixels in each sub-display area in at least M gray scales.

For example, when the target gray level has only one gray level, the data voltage compensation amount of the third color sub-pixel in each sub-display area at the target gray level can be directly used as the data voltage compensation amount of the third color sub-pixel in each sub-display area at the gray level of 0 to 255. When the target gray level has a plurality of gray levels, the data voltage compensation amount of the third color sub-pixel in each sub-display area in the target gray level can be processed based on the linear interpolation algorithm, so as to obtain the data voltage compensation amount of the third color sub-pixel in each sub-display area in other gray levels.

For ease of understanding, the following description will be given with reference to table 2 by taking m=6 and the target gray level is 1 gray level as an example.

TABLE 2

As can be seen from table 2, in the related art, 6 gray-scale shots of three colors of red, green and blue with low, medium and high brightness are required, that is, 18 frames are shot in total, which takes 54 seconds. In some embodiments of the present application, only 6 gray-scale first color frames, 1 gray-scale second color frames and 1 gray-scale third color frames are required to be shot, only 24 seconds are required, and the compensation effect is similar to that of the related art, so that the number of frames shot in the DeMura process can be reduced, the shooting time is shortened, and the time and cost spent in the DeMura process can be reduced.

According to some embodiments of the present application, optionally, the first color picture comprises a green picture and the second color picture comprises any one of a red picture or a blue picture. For example, the second color screen is a blue screen and the third color screen is a red screen.

Based on the brightness compensation method of the display panel provided by the embodiment, correspondingly, the application also provides a specific implementation mode of the brightness compensation device of the display panel. Please refer to the following examples.

As shown in fig. 8, the brightness compensation device 80 of the display panel provided in the embodiment of the present application includes the following modules:

a first obtaining module 801, configured to obtain actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales, where M is an integer greater than 1;

the first determining module 802 is configured to determine a target gray level according to a deviation result of actual brightness of the plurality of sub-display areas in the first color picture of the M gray levels and a first target brightness corresponding to the M gray levels, where the first target brightness is a target brightness of the first color sub-pixel;

a second obtaining module 803, configured to obtain actual brightness of the plurality of sub-display areas when the display panel displays the second color picture of the target gray scale;

The second determining module 804 is configured to determine the data voltage compensation amounts corresponding to the sub-display areas when the M gray scales are at least M gray scales according to the actual brightness of the sub-display areas when the M gray scales are the first color picture and the actual brightness of the sub-display areas when the M gray scales are the second color picture.

In the brightness compensation device for a display panel of the embodiment of the present application, the first obtaining module 801 is configured to obtain actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales, where M is an integer greater than 1; the first determining module 802 is configured to determine a target gray level according to a deviation result of actual brightness of a plurality of sub-display areas when the M gray levels are the first color pictures and first target brightness corresponding to the M gray levels, where the first target brightness is a target brightness of a first color sub-pixel; the second obtaining module 803 is configured to obtain actual brightness of the plurality of sub-display areas when the display panel displays the second color picture of the target gray scale; the second determining module 804 is configured to determine the data voltage compensation amounts corresponding to the sub-display areas when the M gray scales are at least M gray scales according to the actual brightness of the sub-display areas when the M gray scales are the first color picture and the actual brightness of the sub-display areas when the M gray scales are the second color picture. On the one hand, the first color sub-pixels with larger brightness influence still adopt a plurality of first color pictures with different gray scales to perform DeMura compensation, so that a better DeMura compensation effect can be ensured. On the other hand, the target gray level is determined by analyzing the brightness deviation results of the first color pictures of the M gray levels, the second color picture of the small target gray level is adopted for the second color sub-pixels with smaller brightness influence to perform DeMura compensation, and/or the third color picture of the third color sub-pixels with smaller brightness influence is not shot, so that the number of pictures shot in the DeMura process can be reduced, the shooting time is shortened, and the time and cost spent in the DeMura process can be reduced.

In some embodiments, the brightness compensation device 80 of the display panel of the embodiment of the present application may further include a third obtaining module, configured to obtain the actual brightness of the plurality of sub-display areas when the display panel displays the third color picture of the target gray scale. The second determining module 804 is specifically configured to determine data voltage compensation amounts corresponding to the at least M gray scales in each of the sub-display areas according to actual brightness of the M gray scales in the plurality of sub-display areas in the first color picture, actual brightness of the target gray scale in the plurality of sub-display areas in the second color picture, and actual brightness of the target gray scale in the plurality of sub-display areas in the third color picture; the target gray levels comprise N gray levels, wherein N is smaller than M and is a positive integer.

In some embodiments, the first determining module 802 is specifically configured to calculate, for any ith gray level of the M th gray levels, a standard deviation or variance between actual brightness of a plurality of sub-display areas in the first color picture of the ith gray level and a first target brightness corresponding to the ith gray level; according to the sequence from big to small, the gray scales corresponding to Q standard deviations or variances before the sequence are used as target gray scales, and Q is less than or equal to M and is an integer.

In some embodiments, q=1.

In some embodiments, the standard deviation of the actual luminance of the plurality of sub-display areas at the time of the first color picture of the ith gray level and the first target luminance corresponding to the ith gray level is calculated according to the following expression:

the first target brightness corresponding to the ith gray level is represented.

In some embodiments, the variance of the actual luminance of the plurality of sub-display areas at the time of the first color picture of the ith gray level and the first target luminance corresponding to the ith gray level is calculated according to the following expression:

the first target brightness corresponding to the ith gray level is represented.

In some embodiments, the second determining module 804 is specifically configured to calculate, for any ith gray level of the M th gray levels, a difference between an actual luminance of each sub-display area in the first color picture of the ith gray level and a first target luminance corresponding to the ith gray level, to obtain a luminance difference of a first color sub-pixel in each sub-display area; determining the data voltage compensation quantity of the first color sub-pixels in each sub-display area in the ith gray scale according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the first color sub-pixels in each sub-display area; calculating the difference value between the actual brightness of each sub-display area and the second target brightness corresponding to the target gray scale when the second color picture of the target gray scale is displayed, so as to obtain the brightness difference of the second color sub-pixels in each sub-display area, wherein the second target brightness is the target brightness of the second color sub-pixels; determining the data voltage compensation quantity of the second color sub-pixels in each sub-display area when the target gray scale is performed according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the second color sub-pixels in each sub-display area; and taking the data voltage compensation quantity of the second color sub-pixels in each sub-display area in the target gray scale as the data voltage compensation quantity of the second color sub-pixels in each sub-display area in at least M gray scales.

In some embodiments, the brightness compensation device 80 of the display panel of the embodiment of the present application may further include a third determining module, configured to obtain actual brightness of the plurality of sub-display areas when the display panel displays the red frame with the preset gray level and actual brightness of the plurality of sub-display areas when the display panel displays the blue frame with the preset gray level; calculating a first deviation result of actual brightness of a plurality of sub-display areas when a red picture with preset gray scale and second target brightness corresponding to the preset gray scale, wherein the second target brightness is the target brightness of a sub-pixel with a second color; calculating a second deviation result of the actual brightness of the plurality of sub-display areas when the blue picture with the preset gray scale and the third target brightness corresponding to the preset gray scale, wherein the third target brightness is the target brightness of the sub-pixel with the third color; when the first deviation result is greater than or equal to the second deviation result, determining that the red picture is a second color picture; and when the first deviation result is smaller than the second deviation result, determining that the blue picture is the second color picture.

In some embodiments, the first color picture comprises a green picture, the second color picture comprises any one of a red picture or a blue picture, and the target gray level comprises M gray levels.

The modules/units in the apparatus shown in fig. 8 have functions of implementing the steps in fig. 2, and achieve corresponding technical effects, which are not described herein for brevity.

Based on the brightness compensation method of the display panel provided by the embodiment, correspondingly, the application also provides a specific implementation mode of the electronic equipment. Please refer to the following examples.

Fig. 9 shows a schematic hardware structure of an electronic device according to an embodiment of the present application.

The electronic device may include a processor 901 and a memory 902 storing computer program instructions.

In particular, the processor 901 may include a central processing unit (Central Processing Unit, CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of embodiments of the present application.

Memory 902 may include mass storage for data or instructions. By way of example, and not limitation, the memory 902 may comprise a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the foregoing. In one example, the memory 902 may include removable or non-removable (or fixed) media, or the memory 902 is a non-volatile solid state memory. Memory 902 may be internal or external to the integrated gateway disaster recovery device.

In one example, memory 902 may be Read Only Memory (ROM). In one example, the ROM may be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

The memory 902 may include Read Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors) it is operable to perform the operations described with reference to a method according to an aspect of the present application.

The processor 901 reads and executes the computer program instructions stored in the memory 902 to implement the methods/steps S101 to S104 in the embodiment shown in fig. 2, and achieve the corresponding technical effects achieved by executing the methods/steps in the embodiment shown in fig. 2, which are not described herein for brevity.

In one example, the electronic device may also include a communication interface 903 and a bus 910. As shown in fig. 9, the processor 901, the memory 902, and the communication interface 903 are connected to each other via a bus 910, and communicate with each other.

The communication interface 903 is mainly used to implement communication between each module, device, unit, and/or apparatus in the embodiments of the present application.

Bus 910 includes hardware, software, or both that couple components of an electronic device to each other. By way of example, and not limitation, the buses may include an accelerated graphics port (Accelerated Graphics Port, AGP) or other graphics Bus, an enhanced industry standard architecture (Extended Industry Standard Architecture, EISA) Bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an industry standard architecture (Industry Standard Architecture, ISA) Bus, an infiniband interconnect, a Low Pin Count (LPC) Bus, a memory Bus, a micro channel architecture (MCa) Bus, a Peripheral Component Interconnect (PCI) Bus, a PCI-Express (PCI-X) Bus, a Serial Advanced Technology Attachment (SATA) Bus, a video electronics standards association local (VLB) Bus, or other suitable Bus, or a combination of two or more of the above. Bus 910 may include one or more buses, where appropriate. Although embodiments of the present application describe and illustrate a particular bus, the present application contemplates any suitable bus or interconnect.

In addition, in combination with the brightness compensation method of the display panel in the above embodiment, the embodiment of the application may be implemented by providing a computer readable storage medium. The computer readable storage medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement a method of brightness compensation for a display panel in any of the above embodiments. Examples of computer readable storage media include non-transitory computer readable storage media such as electronic circuits, semiconductor memory devices, ROMs, random access memories, flash memories, erasable ROMs (EROM), floppy disks, CD-ROMs, optical disks, hard disks.

It should be clear that the present application is not limited to the particular arrangements and processes described above and illustrated in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions, or change the order between steps, after appreciating the spirit of the present application.

The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and the like. The code segments may be downloaded via computer networks such as the internet, intranets, etc.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be different from the order in the embodiments, or several steps may be performed simultaneously.

Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to being, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware which performs the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.

Claims

1. A brightness compensation method of a display panel, wherein a display area of the display panel includes a plurality of sub-display areas, the method comprising:

acquiring actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales, wherein M is an integer greater than 1;

determining a target gray scale according to deviation results of actual brightness of a plurality of sub-display areas in the first color picture of M gray scales and first target brightness corresponding to the M gray scales, wherein the first target brightness is the target brightness of a first color sub-pixel;

acquiring actual brightness of a plurality of sub-display areas when the display panel displays a second color picture of the target gray scale;

determining data voltage compensation amounts corresponding to the sub-display areas when the gray scales are at least M according to the actual brightness of the sub-display areas when the gray scales are the first color picture and the actual brightness of the sub-display areas when the target gray scales are the second color picture;

determining a data voltage compensation amount corresponding to each sub-display area in at least M gray scales according to the actual brightness of the sub-display areas in the first color picture of the M gray scales and the actual brightness of the sub-display areas in the second color picture of the target gray scales, wherein the data voltage compensation amount specifically comprises:

For any ith gray level in the M gray levels, calculating a difference value between the actual brightness of each sub-display area and the first target brightness corresponding to the ith gray level when a first color picture of the ith gray level is displayed, and obtaining a brightness difference of a first color sub-pixel in each sub-display area;

determining the data voltage compensation amount of the first color sub-pixels in each sub-display area in the ith gray scale according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the first color sub-pixels in each sub-display area;

calculating the difference value between the actual brightness of each sub-display area and the second target brightness corresponding to the target gray scale when the second color picture of the target gray scale is displayed, so as to obtain the brightness difference of the second color sub-pixels in each sub-display area, wherein the second target brightness is the target brightness of the second color sub-pixels;

determining the data voltage compensation quantity of the second color sub-pixels in each sub-display area when the target gray scale is performed according to the corresponding relation between the predetermined brightness and the data voltage and the brightness difference of the second color sub-pixels in each sub-display area;

And taking the data voltage compensation quantity of the second color sub-pixels in each sub-display area in the target gray scale as the data voltage compensation quantity of the second color sub-pixels in each sub-display area in at least M gray scales.

2. The method according to claim 1, wherein the method further comprises:

acquiring actual brightness of a plurality of sub-display areas when the display panel displays a third color picture of the target gray scale;

the determining, according to the actual brightness of the plurality of sub-display areas when the first color frames of the M gray scales and the actual brightness of the plurality of sub-display areas when the second color frames of the target gray scales, the data voltage compensation amounts corresponding to the respective sub-display areas when the M gray scales are at least, specifically includes:

determining data voltage compensation amounts corresponding to each sub-display area in at least M gray scales according to the actual brightness of the plurality of sub-display areas in the first color picture of the M gray scales, the actual brightness of the plurality of sub-display areas in the second color picture of the target gray scales and the actual brightness of the plurality of sub-display areas in the third color picture of the target gray scales;

The target gray scales comprise N gray scales, wherein N is smaller than M and is a positive integer.

3. The method according to claim 1, wherein determining the target gray scale according to the deviation result of the actual brightness of the plurality of sub-display areas in the first color frames of the M gray scales and the first target brightness corresponding to the M gray scales, respectively, specifically comprises:

for any ith gray level in the M gray levels, calculating standard deviation or variance of actual brightness of a plurality of sub-display areas in a first color picture of the ith gray level and first target brightness corresponding to the ith gray level;

and taking the gray scales corresponding to the standard deviation or the variance of Q before sequencing as the target gray scales according to the sequencing from big to small, wherein Q is less than or equal to M and is an integer.

4. The method of claim 3, wherein the step of,

Q＝1。

5. a method according to claim 3, wherein standard deviations of actual luminance of the plurality of sub-display areas at the time of the first color picture of the ith gray scale and the first target luminance corresponding to the ith gray scale are calculated according to the following expression:

wherein σ represents the standard deviation, N represents the number of the sub-display areas in the display panel, and x _j Representing the actual brightness of the j-th sub-display section in the i-th gray-scale first color picture,

and representing the first target brightness corresponding to the ith gray scale.

6. A method according to claim 3, wherein the variances of the actual luminance of the plurality of sub-display areas at the time of the first color picture of the ith gray scale and the first target luminance corresponding to the ith gray scale are calculated according to the following expression:

wherein s is ² Representing the variance, N represents the number of sub-display areas in the display panel, x ₁ 、x ₂ 、x ₃ And x _N Respectively represent the ith gray levelThe actual brightness of the 1 st said sub-display area, the 2 nd said sub-display area, the 3 rd said sub-display area and the nth said sub-display area when a color picture is displayed,

7. The method of claim 1, wherein prior to obtaining actual brightness of the plurality of sub-display areas when the display panel displays the second color picture of the target gray scale, the method further comprises:

acquiring actual brightness of a plurality of sub-display areas when the display panel displays a red picture with preset gray scale and actual brightness of a plurality of sub-display areas when the display panel displays a blue picture with preset gray scale;

Calculating a first deviation result of actual brightness of a plurality of sub-display areas in the process of the red picture with the preset gray scale and second target brightness corresponding to the preset gray scale, wherein the second target brightness is the target brightness of a sub-pixel with a second color;

calculating second deviation results of actual brightness of a plurality of sub-display areas in the preset gray-scale blue picture and third target brightness corresponding to the preset gray-scale, wherein the third target brightness is the target brightness of a third color sub-pixel;

when the first deviation result is greater than or equal to the second deviation result, determining that the red picture is the second color picture;

and when the first deviation result is smaller than the second deviation result, determining that the blue picture is the second color picture.

8. The method of claim 1, wherein the first color picture comprises a green color picture, the second color picture comprises any one of a red color picture or a blue color picture, and the target gray level comprises M of the gray levels.

9. A brightness compensation device for a display panel, wherein a display area of the display panel includes a plurality of sub-display areas, the device comprising:

The first acquisition module is used for acquiring the actual brightness of a plurality of sub-display areas when the display panel displays M first color pictures with different gray scales, wherein M is an integer greater than 1;

the first determining module is used for determining target gray scales according to deviation results of actual brightness of a plurality of sub-display areas in the first color pictures of the M gray scales and first target brightness corresponding to the M gray scales, wherein the first target brightness is the target brightness of a first color sub-pixel;

the second acquisition module is used for acquiring the actual brightness of the plurality of sub-display areas when the display panel displays the second color picture of the target gray scale;

the second determining module is used for determining data voltage compensation amounts corresponding to the sub-display areas when the gray scales are at least M according to the actual brightness of the sub-display areas when the gray scales are the first color pictures and the actual brightness of the sub-display areas when the gray scales are the second color pictures;

the second determining module is specifically configured to:

10. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of the brightness compensation method of a display panel according to any one of claims 1 to 8.