CN118212856A

CN118212856A - Chromaticity extraction method, device, equipment and storage medium

Info

Publication number: CN118212856A
Application number: CN202410331150.4A
Authority: CN
Inventors: 胡凤章; 刘可; 楼均辉; 李轩
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: 2024-03-18
Filing date: 2024-03-18
Publication date: 2024-06-18

Abstract

The application discloses a chromaticity extraction method, device, equipment and storage medium, which are used for photographing a display area of a display panel under the condition that the display panel displays a test picture to obtain a target photographing picture, wherein the display area of the display panel comprises at least one chromaticity extraction area, each chromaticity extraction area comprises a first target light-emitting area and a non-light-emitting area, the first target light-emitting area comprises a first light-emitting area, a second light-emitting area and a third light-emitting area with different light-emitting colors, all sub-pixels in the non-light-emitting area do not emit light, the first light-emitting area, the second light-emitting area and the third light-emitting area are separated by the non-light-emitting area, the problem of mutual interference among R, G, B light-emitting areas is solved, higher-purity brightness data of the first light-emitting area, the second light-emitting area and the third light-emitting area can be extracted, more accurate chromaticity data of each chromaticity extraction area can be obtained according to the brightness data, and accurate extraction of chromaticity information is realized.

Description

Chromaticity extraction method, device, equipment and storage medium

Technical Field

The present application belongs to the field of display technology, and in particular, relates to a method, an apparatus, a device, and a storage medium for extracting chromaticity.

Background

Organic LIGHT EMITTING (OLED) and flat display devices based on light emitting Diode (LIGHT EMITTING) technology have been widely used in various consumer electronic products such as mobile phones, televisions, notebook computers, and desktop computers, because of their advantages such as high image quality, power saving, thin body, and wide application range.

However, the display performance of the current OLED display product needs to be improved.

Disclosure of Invention

The embodiment of the application provides a method, a device, equipment and a storage medium for extracting chromaticity, which solve the problem of poor accuracy of chromaticity data extraction in the prior art.

In a first aspect, an embodiment of the present application provides a method for extracting chromaticity, including:

When the display panel displays the test picture, the display area of the display panel comprises at least one chromaticity extraction area, the chromaticity extraction area comprises a first target light-emitting area and a non-light-emitting area, the first target light-emitting area comprises a first light-emitting area, a second light-emitting area and a third light-emitting area with different light-emitting colors, and the first light-emitting area, the second light-emitting area and the third light-emitting area are separated by the non-light-emitting area;

Extracting a first luminance average value of a first light-emitting area, a second luminance average value of a second light-emitting area and a third luminance average value of a third light-emitting area in a chromaticity extraction area according to a target shooting picture;

and determining the chromaticity value of each chromaticity extraction area according to the first brightness average value, the second brightness average value and the third brightness average value.

In a possible implementation manner of the first aspect, the first light emitting region includes a plurality of first color sub-pixels that emit light, the second light emitting region includes a plurality of second color sub-pixels that emit light, the third light emitting region includes a plurality of third color sub-pixels that emit light, and the non-light emitting region includes a plurality of sub-pixels that do not emit light;

Preferably, the number of sub-pixels of the first light emitting region, the number of sub-pixels of the second light emitting region, and the number of sub-pixels of the third light emitting region are equal.

In a possible implementation manner of the first aspect, the test frames include a first test frame and a second test frame, and when the display panel displays the first test frame and the second test frame, positions of a first target light emitting area of a display area of the display panel are different; under the condition that the display panel displays the test picture, photographing the display area of the display panel to obtain a target photographing picture, wherein the photographing process comprises the following steps:

under the condition that the display panel displays the first test picture, photographing the display area of the display panel to obtain a first photographing picture;

Under the condition that the display panel displays the second test picture, photographing the display area of the display panel to obtain a second photographing picture;

and combining the first shooting picture and the second shooting picture to obtain a target shooting picture.

In a possible implementation manner of the first aspect, the chrominance extraction region comprises a first chrominance extraction sub-region and a second chrominance extraction sub-region; the second chromaticity extraction subarea of the first shooting picture comprises a first target luminous area and a non-luminous area; the first chrominance extraction subarea of the second shooting picture comprises a first target luminous area and a non-luminous area; combining the first shooting picture and the second shooting picture to obtain a target shooting picture, wherein the method comprises the following steps:

Combining the second chromaticity extraction area of the first shooting picture with the first chromaticity extraction area of the second shooting picture to obtain a target shooting picture;

Preferably, the first chromaticity extraction subarea of the first shooting picture is a second target luminous area; the second chromaticity extraction subarea of the second shooting picture is a second target luminous area;

Preferably, the second target light emitting region includes a plurality of color sub-pixels emitting light;

Preferably, the first chrominance extraction sub-region and the second chrominance extraction sub-region comprise the same number of sub-pixels;

Preferably, in the first shot picture or the second shot picture, the number of sub-pixels in the first light-emitting region, the second light-emitting region, the third light-emitting region, and the non-light-emitting region is less than or equal to 1/2 of the number of all sub-pixels.

In a possible implementation manner of the first aspect, after determining the chrominance value of each chrominance extraction region according to the first luminance average, the second luminance average and the third luminance average, the method further comprises:

determining a reference chromaticity value according to the chromaticity value of the chromaticity extraction area at the preset position;

Determining a chromaticity deviation result of the target shooting picture based on the reference chromaticity value;

preferably, the preset position is a center position of the display area;

Preferably, the central location includes a plurality of chromaticity extraction regions; determining a reference chroma value from the chroma value of the chroma extraction region at the preset position, including:

determining a chromaticity mean value of the plurality of chromaticity extraction regions at the center position;

And determining the chromaticity mean value as a reference chromaticity value.

In a possible implementation manner of the first aspect, the test frame includes an nth gray-scale frame, and a gray-scale value of a subpixel that emits light in the nth gray-scale frame is the nth gray-scale value, where N is a positive integer greater than 0;

Preferably, the nth gray scale value includes a maximum gray scale value in a preset gray scale value range;

preferably, the nth gray scale value further includes an intermediate gray scale value in a preset gray scale value range.

In a possible implementation manner of the first aspect, the method further includes:

Determining a chromaticity compensation value corresponding to a target gray level value in a preset gray level value range according to a chromaticity deviation result corresponding to an Nth gray level picture;

Preferably, determining a chromaticity compensation value corresponding to the target gray-scale value in the preset gray-scale value range according to the chromaticity deviation result corresponding to the nth gray-scale picture includes:

Determining a chromaticity compensation value corresponding to the maximum gray level according to a chromaticity deviation result corresponding to the maximum gray level;

determining a chromaticity compensation value corresponding to the intermediate gray level value according to a chromaticity deviation result corresponding to the intermediate gray level value;

Determining the corresponding relation between the gray scale value and the chromaticity compensation value according to the chromaticity compensation value corresponding to the maximum gray scale value and the chromaticity compensation value corresponding to the middle gray scale value;

And determining a chromaticity compensation value corresponding to the target gray level value in the preset gray level value range according to the corresponding relation between the gray level value and the chromaticity compensation value.

In a second aspect, an embodiment of the present application further provides a device for extracting chromaticity, including:

The photographing module is used for photographing a display area of the display panel to obtain a target photographing picture under the condition that the display panel displays a test picture, when the display panel displays the test picture, the display area of the display panel comprises at least one chromaticity extraction area, the chromaticity extraction area comprises a first target luminous area and a non-luminous area, the first target luminous area comprises a first luminous area, a second luminous area and a third luminous area which have different luminous colors, and the first luminous area, the second luminous area and the third luminous area are separated by the non-luminous area;

The extraction module is used for extracting a first brightness average value of a first light-emitting area, a second brightness average value of a second light-emitting area and a third brightness average value of a third light-emitting area in the chromaticity extraction area according to the target shooting picture;

and the determining module is used for determining the chromaticity value of each chromaticity extraction area according to the first brightness average value, the second brightness average value and the third brightness average value.

In a third aspect, embodiments of the present application further provide a chromaticity extraction apparatus, the chromaticity extraction apparatus including a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements the first aspect, or the method of extracting chromaticity in any possible implementation of the first aspect.

In a fourth aspect, embodiments of the present application further provide a computer storage medium having stored thereon computer program instructions which, when executed by a processor, implement the first aspect, or a method of extracting chromaticity in any possible implementation manner of the first aspect.

According to the chromaticity extraction method, device, equipment and storage medium, under the condition that a display panel displays a test picture, a target shooting picture is obtained by shooting a display area of the display panel by using a black-and-white camera, when the display panel displays the test picture, a display area of the display panel comprises at least one chromaticity extraction area, the chromaticity extraction area comprises a first target light-emitting area and a non-light-emitting area, the first target light-emitting area comprises a first light-emitting area, a second light-emitting area and a third light-emitting area which emit light of different light colors, for example, the first light-emitting area is an area only emitting light of R sub-pixels, the second light-emitting area is an area only emitting light of G sub-pixels, the third light-emitting area is an area only emitting light of B sub-pixels, all sub-pixels in the non-light-emitting area do not emit light, and the first light-emitting area, the second light-emitting area and the third light-emitting area are separated by the non-light-emitting area, so that the purpose of keeping a certain distance between the first light-emitting area, the second light-emitting area and the third light-emitting area is achieved, the problem of mutual interference between the light-emitting areas of R, G, B is solved, and then the data of higher purity can be extracted, and the first luminance data of average value can be extracted, and the first average value of luminance value can be extracted according to the first average value of luminance value and the luminance value of luminance value is determined, and the luminance value of the luminance value is determined: the second luminance average value: and the third brightness average value realizes the accurate extraction of the chromaticity information.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are needed to be used 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 flow chart of a chromaticity extraction method according to an embodiment of the present application;

Fig. 2 is a schematic diagram of a target shooting picture provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a chromaticity extraction region according to an embodiment of the present application;

FIG. 4 is a schematic diagram of another chromaticity extraction region according to an embodiment of the present application;

FIG. 5 is a flowchart of another chromaticity extraction method according to an embodiment of the present application;

Fig. 6-a is a schematic diagram of a first shot image according to an embodiment of the present application;

fig. 6-b is a schematic diagram of a second shot image according to an embodiment of the present application;

Fig. 7 is a schematic flow chart of combining a first shot picture and a second shot picture to obtain a target shot picture according to an embodiment of the present application;

fig. 8 is a schematic flow chart of combining a chromaticity extraction area of a first shot picture and a chromaticity extraction area of a second shot picture to obtain a chromaticity extraction area of a target shot picture according to an embodiment of the present application;

FIG. 9 is a flowchart of another chromaticity extraction method according to an embodiment of the present application;

Fig. 10 is a flowchart of another chromaticity extraction method according to an embodiment of the present application;

Fig. 11 is a schematic diagram of a chromaticity extraction device according to an embodiment of the present application;

fig. 12 is a schematic diagram of a chromaticity extraction device according to an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the application and are not configured to limit the application. 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 application by showing examples of the 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.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, it is intended that the present application covers the modifications and variations of this application provided they come within the scope of the appended claims (the claims) and their equivalents. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.

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 firstly specifically describes the problems existing in the related art:

The existing OLED products have abnormal screen chromaticity caused by various reasons in the production process, have batch fixed position color cast and random position color cast, and cannot reach the shipment level when the screen body color cast is serious, so that yield loss is caused.

In the prior art, the industrial black-and-white camera cannot extract chromaticity information, and when Demura compensation is performed, the industrial black-and-white camera can only respectively shoot R monochromatic pictures, G monochromatic pictures and B monochromatic pictures under different gray scales to perform brightness compensation, for example, three different pictures are shot in a time-sharing manner, only one of three primary colors of RGB in each picture emits light, and then the brightness of the R/G/B monochromatic pictures is detected and compensated, but the R/G/B monochromatic pictures cannot embody R: g: the B-ratio information, that is, RGB cannot be directly compared in the same picture, and the ratio information cannot be obtained, so that the black-and-white camera can only detect luminance and compensate the luminance, and cannot detect chromaticity and compensate color cast.

Although the color camera can extract chromaticity information, because the color camera is provided with the optical filter, the brightness and chromaticity data extracted through the optical filter have a certain loss, for example, a color picture is shot, the three primary colors of RGB in the color picture are all emitting light, the data units are the same, and the chromaticity data can be directly obtained. Therefore, the color camera has the problems of poor accuracy of extracting the chrominance data and poor chrominance compensation effect. Therefore, the prior art has the problems that the black-and-white camera can only detect the brightness and compensate the brightness, cannot detect the chromaticity and compensate the color cast, and the color camera can extract the chromaticity data but has poor accuracy of extracting the chromaticity data.

Based on the above, the embodiment of the application provides a method, a device, equipment and a storage medium for extracting chromaticity, which can solve the problem of poor accuracy of chromaticity data extraction in the prior art.

Embodiments of the present application are described in detail below with reference to the attached drawings.

Fig. 1 is a schematic flow chart of a chromaticity extraction method according to an embodiment of the present application, as shown in fig. 1, the method may include steps S110 to S130.

S110, under the condition that the display panel displays the test picture, photographing is carried out on a display area of the display panel to obtain a target photographing picture, when the display panel displays the test picture, the display area of the display panel comprises at least one chromaticity extraction area, the chromaticity extraction area comprises a first target light-emitting area and a non-light-emitting area, the first target light-emitting area comprises a first light-emitting area, a second light-emitting area and a third light-emitting area which are different in light-emitting color, and the first light-emitting area, the second light-emitting area and the third light-emitting area are separated by the non-light-emitting area.

The test picture is preset by a developer, can be used for testing the brightness uniformity and the chromaticity uniformity of the display panel before leaving a factory, generates image data after the test picture is set, and is input to the display panel, then the display panel can convert the image data into data voltage so as to drive OLED sub-pixels on the display panel to emit light, so that the test picture can be displayed in a display area of the display panel, and then the display area of the display panel can be photographed by an industrial camera so as to be used for extracting and compensating the brightness data and the chromaticity data.

It should be noted that, in the embodiment of the present application, the gray scales of all the emitted sub-pixels in the same test frame are the same, so ideally, the brightness of each sub-pixel is the same, but because the OLED product has abnormal brightness and chromaticity of the screen due to various reasons in the process of generation, accurate extraction of brightness data and chromaticity data and corresponding compensation are required to reach the factory standard.

The display area of the display panel, which refers to an area of the display panel displaying the test picture, may be composed of a plurality of chromaticity extraction areas, each chromaticity extraction area including a first target light-emitting area and a non-light-emitting area. Before the display panel displays the test picture, the display area of the display panel can be divided into a plurality of chromaticity extraction areas in advance, and the positions of the chromaticity extraction areas are fixed.

The first target light emitting region may include a first light emitting region, a second light emitting region, and a third light emitting region having different light emitting colors, for example, the first light emitting region is a region where only R sub-pixels emit light, the second light emitting region is a region where only G sub-pixels emit light, and the third light emitting region is a region where only B sub-pixels emit light.

All the sub-pixels in the non-light emitting region do not emit light, for example, the non-light emitting region includes a plurality of R, G, and B sub-pixels that do not emit light. The first light-emitting area, the second light-emitting area and the third light-emitting area are separated by the non-light-emitting area, so that a certain interval is kept among the first light-emitting area, the second light-emitting area and the third light-emitting area, the problem of mutual interference among R, G, B light-emitting areas can be solved, and therefore higher-purity brightness data are extracted.

In one example, fig. 2 is a target photographing screen obtained by photographing a display area of a display panel by an industrial camera in a case where a test screen is displayed on the display area of the display panel. As shown in fig. 2, the target photographing picture may include a plurality of chromaticity extraction regions, each of which includes a first target light-emitting region including a first light-emitting region, a second light-emitting region, and a third light-emitting region, which emit light of different colors, for example, the first light-emitting region is a region where only R sub-pixels emit light, the second light-emitting region is a region where only G sub-pixels emit light, the third light-emitting region is a region where only B sub-pixels emit light, all sub-pixels in the non-light-emitting region do not emit light, and adjacent first target light-emitting regions are separated by the non-light-emitting region. Each chromaticity extraction region at least comprises a first light-emitting region, a second light-emitting region and a third light-emitting region, wherein the first light-emitting region, the second light-emitting region and the third light-emitting region are separated by a non-light-emitting region, and the non-light-emitting region is the black non-light-emitting region in fig. 2. For example, as shown in fig. 3, fig. 3 is a schematic diagram of a chromaticity extraction area provided in an embodiment of the present application, each chromaticity extraction area may include one R light-emitting area, one G light-emitting area, and one B light-emitting area, or as shown in fig. 4, fig. 4 is another schematic diagram of a chromaticity extraction area provided in an embodiment of the present application, the chromaticity extraction area may include two R light-emitting areas, two G light-emitting areas, and two B light-emitting areas, and the number of light-emitting areas in the chromaticity extraction area may be set according to requirements.

Specifically, in step S110, it may be understood that, when the display panel displays a test frame corresponding to a certain gray level, a target shot frame may be obtained by using a black-and-white camera to shoot a display area of the display panel, where, when the display panel displays the test frame, the display area of the display panel is divided into a plurality of chromaticity extraction areas, each chromaticity extraction area includes a first target light-emitting area and a non-light-emitting area, the first target light-emitting area includes a first light-emitting area, a second light-emitting area and a third light-emitting area with different light-emitting colors, for example, the first light-emitting area is an area with R sub-pixel only, the second light-emitting area is an area with G sub-pixel only, all sub-pixels in the non-light-emitting area do not emit light, and adjacent first target light-emitting areas are separated by the non-light-emitting area, so as to achieve the purpose of maintaining a certain distance between the first light-emitting area, the second light-emitting area and the third light-emitting area, thereby solving the problem of mutual interference between the light-emitting areas of R, G, B is solved, and higher-purity brightness data can be extracted.

In some embodiments, the first light emitting region includes a plurality of first color sub-pixels that emit light, the second light emitting region includes a plurality of second color sub-pixels that emit light, the third light emitting region includes a plurality of third color sub-pixels that emit light, and the non-light emitting region includes a plurality of sub-pixels that do not emit light.

Specifically, the first light emitting region may include a plurality of R sub-pixels emitting light, the second light emitting region may include a plurality of G sub-pixels emitting light, the third light emitting region may include a plurality of B sub-pixels emitting light, the non-light emitting region includes a plurality of RGB sub-pixels not emitting light, and the number of the sub-pixels emitting light in each light emitting region may be set as required to make the acquired luminance information more accurate.

In one embodiment, the number of sub-pixels of the first light emitting region=the number of sub-pixels of the second light emitting region=the number of sub-pixels of the third light emitting region, and each light emitting region takes the same number of light emitting pixels, R of each light emitting region may be ensured: g: and B, the brightness proportion information is more accurate, and more accurate chromaticity values are obtained.

In some embodiments, the test frame includes an nth gray scale frame, the gray scale value of the subpixel in the nth gray scale frame that emits light is the nth gray scale value, where N is a positive integer greater than 0;

Specifically, there may be a plurality of test frames, for example, the test frame may be a first gray-scale frame, and the gray-scale value of the sub-pixel that emits light in the first gray-scale frame is a first gray-scale value; the test frame may be a second gray-scale frame, and the gray-scale value of the sub-pixel in the second gray-scale frame is a second gray-scale value; ..; the test frame may be a 256 th gray-scale frame, the gray-scale value of the sub-pixel of the light emitted in the 256 th gray-scale frame is the 256 th gray-scale value, that is, the test frame may be any gray-scale frame, for example, the test frame has 256 pieces of total gray-scale frames, each gray-scale value may be tested once, the chromaticity value of the sub-pixel under each gray-scale value may be obtained, the test is comprehensive, and the brightness extraction and chromaticity extraction results are more accurate.

It should be noted that, through the research of the inventor, under the condition of using 256 test pictures to perform the test, each gray level value needs to be tested once, although the accuracy of the brightness extraction and the chromaticity extraction results is ensured, the steps are complicated, and the working efficiency is not high, so that a representative test picture corresponding to one or a plurality of gray level values can be selected for the test, and the working efficiency can be improved while the accuracy of the brightness extraction and the chromaticity extraction results is ensured.

In one embodiment, the test frame may be a test frame corresponding to 255 gray scales, and the test frame corresponding to 255 gray scales is the brightest white frame, and may be tested once under 255 gray scales to obtain a chromaticity compensation value under 255 gray scales, and then the chromaticity compensation value is used as the chromaticity compensation value under all gray scales, thereby improving efficiency.

It should be noted that, through further researches by the inventor, it is found that when compensating a gray-scale picture with a larger difference from 255 gray-scales, a problem of negative compensation may occur due to different degrees of chromaticity deviation under different gray-scales, and the compensation effect is affected, so that a test picture corresponding to a certain number of gray-scale values may be selected for testing, for example, a gray-scale range of 0 to 255 may be divided into a plurality of sub-ranges, and one representative gray-scale value in each sub-range may be selected, for example, a highest gray-scale value in each sub-range may be selected.

In another embodiment, two test frames corresponding to the gray levels are used for testing, one is the test frame corresponding to the highest gray level, namely the test frame corresponding to the 255 gray levels, and the other is the test frame corresponding to the middle gray level in the 0-255 gray levels, namely the test frame corresponding to the 128 gray levels, and the inventor researches find that although the chromaticity deviation degree is different under different gray levels, the chromaticity deviation degree basically follows the rule of linear change, so that the test can be performed once under the 255 gray levels to obtain the chromaticity compensation value under the 255 gray levels, and then the test is performed once under the 128 gray levels to obtain the chromaticity compensation value under the 128 gray levels, and the chromaticity compensation curve can be obtained by fitting only by testing the two gray level frames, so that the efficiency can be improved while the compensation effect is improved.

In some embodiments, as shown in fig. 5, the test frames include a first test frame and a second test frame, and when the display panel displays the first test frame and the second test frame, the positions of the first target light emitting areas of the display panel are different; step S110, when the display panel displays the test frame, photographs the display area of the display panel to obtain a target photographing frame, including:

S111, under the condition that the display panel displays the first test picture, photographing the display area of the display panel to obtain a first photographing picture;

s112, under the condition that the display panel displays the second test picture, photographing the display area of the display panel to obtain a second photographing picture;

s113, combining the first shooting picture and the second shooting picture to obtain a target shooting picture.

The whole test picture can be divided into two parts, and can be respectively called a first test picture and a second test picture. For example, when the test frame corresponding to the highest gray-scale value 255 needs to be tested, two test frames may be manufactured in advance, and the positions of the first target light emitting areas of the two test frames are different. For example, two complementary test frames may be prefabricated, as shown in fig. 6-a and 6-b, and after the first target light-emitting area and the non-light-emitting area in fig. 6-a and 6-b are combined, a complete test frame corresponding to 255 gray scale values may be obtained.

It should be noted that, through the study of the inventor, if the ratio of the black frame in a single test frame is too large, that is, the number of non-light-emitting sub-pixels included in the non-light-emitting region is too large, the extracted luminance information is not accurate enough, that is, the more the black frame is affected by IR Drop, the worse the accuracy of the extracted luminance information, so that the luminance information obtained by directly photographing at one time is not accurate enough. For example, when testing luminance and chrominance data under 255 gray scales, the real luminance is that all sub-pixels are lightened and are all the luminance displayed under 255 gray scales, so that the black pictures obtained by directly photographing at one time are too many, the accuracy of the extracted luminance information is not high enough, and the target photographing picture can be obtained in a form of '2 times' or 'multiple times' photographing and then recombination. For example, the target shooting picture is obtained in a mode of '2' shooting and then recombination, namely, the target shooting picture is obtained by '2' shooting through two complementary test pictures, the number of non-luminous sub-pixels in each shot test picture is not more than 1/2 of the total number of sub-pixels, and the brightness information of the first luminous area, the second luminous area and the third luminous area can be more accurate and more approximate to the real brightness, so that the accuracy of the brightness information and the chromaticity information of the combined target shooting picture is higher.

Specifically, after a whole test picture is divided into two to obtain a first test picture and a second test picture, the first test picture can be photographed respectively to obtain a first photographing picture, the second test picture can be photographed to obtain a second photographing picture, and then the first photographing picture and the second photographing picture can be combined to obtain a target photographing picture. For example, the target shooting picture is obtained by taking a picture for 2 times through 2 complementary test pictures, the number of non-luminous sub-pixels in each shot test picture is not more than 1/2 of the total number of sub-pixels, and the brightness information of the extracted first luminous area, second luminous area and third luminous area can be more accurate and more approximate to the real brightness, so that the accuracy of the brightness information and chromaticity information of the combined target shooting picture is higher.

In some embodiments, as shown in fig. 6-a and 6-b, the chroma extraction region includes a first chroma extraction sub-region 11 and a second chroma extraction sub-region 12; the second chromaticity extraction sub-region 12 of the first photographed picture includes a first target light-emitting region and a non-light-emitting region; the first chrominance extraction subarea 11 of the second photographing picture includes a first target light emitting area and a non-light emitting area; combining the first shooting picture and the second shooting picture to obtain a target shooting picture, wherein the method comprises the following steps:

combining the second chromaticity extraction subarea 12 of the first shooting picture with the first chromaticity extraction subarea 11 of the second shooting picture to obtain a target shooting picture;

Preferably, the first chrominance extraction sub-area 11 of the first photographing picture is the second target light emitting area; the second chromaticity extraction sub-area 12 of the second shooting picture is a second target light emitting area;

Preferably, the first chrominance extraction sub-region 11 and the second chrominance extraction sub-region 12 comprise the same number of sub-pixels;

The display area of the display panel is divided into a plurality of chromaticity extraction areas, each chromaticity extraction area is divided into an upper subarea and a lower subarea, the upper subarea is a first subarea, which can be called a first chromaticity extraction subarea, the lower subarea is a second subarea, which can be called a second chromaticity extraction subarea, and similarly, each chromaticity extraction area can be divided into a left subarea and a right subarea, the subarea at the left position is a first chromaticity extraction subarea, and the subarea at the right position is a second chromaticity extraction subarea.

Specifically, the process of "combining" the first shot and the second shot is as follows: the first chromaticity extraction subarea 11 of the first shooting picture and the second chromaticity extraction subarea 12 of the second shooting picture are removed, and the second chromaticity extraction subarea 12 of the first shooting picture and the first chromaticity extraction subarea 11 of the second shooting picture are combined, namely, the first target luminous area and the non-luminous area of the first shooting picture are combined with the first target luminous area and the non-luminous area of the second shooting picture, so that the target shooting picture can be obtained. The target shooting picture is obtained in a mode of '2 times' shooting and then combining, namely '2 times' shooting is carried out through two complementary test pictures, the number of non-luminous sub-pixels in each shot test picture is not more than 1/2 of the total number of sub-pixels, and the brightness information of the first luminous area, the second luminous area and the third luminous area can be more accurate and more approximate to the real brightness, so that the accuracy of the brightness information and the chromaticity information of the combined target shooting picture is higher.

For example, as shown in fig. 7, from a macroscopic point of view, the first target light-emitting area and the non-light-emitting area of the first shot are combined with the first target light-emitting area and the non-light-emitting area of the first shot, so that a complete target shot can be obtained, for example, fig. 6-a and fig. 6-b can be combined, so that fig. 2 can be obtained. In addition, from a microscopic point of view, that is, from the perspective of a single chromaticity extraction region, as shown in fig. 8, the first target light-emitting region and the non-light-emitting region of the chromaticity extraction region of the first photographed picture are combined with the first target light-emitting region and the non-light-emitting region of the chromaticity extraction region of the same position of the first photographed picture, so that the chromaticity extraction region of the same position of the target photographed picture can be obtained, for example, the chromaticity extraction region in fig. 6-a is combined with the chromaticity extraction region of the same position in fig. 6-b, so that the chromaticity extraction region of the same position in fig. 2 can be obtained.

It should be noted that, for ease of understanding, the first shot frame and the second shot frame are "complementary", and it is understood that the "first chromaticity extraction sub-region" of the first shot frame includes the second target light emitting region, the "second chromaticity extraction sub-region" of the second shot frame includes the second target light emitting region, and similarly, the "second chromaticity extraction sub-region" of the first shot frame includes the first target light emitting region and the non-light emitting region, and the "first chromaticity extraction sub-region" of the second shot frame includes the first target light emitting region and the non-light emitting region.

In one embodiment, the first chromaticity extraction sub-region of the first photographed picture is the second target light emitting region, and the second chromaticity extraction sub-region of the second photographed picture is the second target light emitting region, that is, the second chromaticity extraction region of the first photographed picture and the first chromaticity extraction region of the second photographed picture are combined, and the first chromaticity extraction sub-region of the first photographed picture and the second chromaticity extraction sub-region of the second photographed picture are not combined, that is, the second target light emitting regions of the first photographed picture and the second photographed picture are ignored when being combined. The second target light-emitting area can be used for improving the influence of the IR Drop, reducing the number of sub-pixels of a non-light-emitting area of a single test picture, namely reducing the duty ratio of a black picture, enabling the combined target shooting picture to be closer to real brightness, and improving the accuracy of extracting brightness information and chromaticity information of the target shooting picture.

In another embodiment, the second target light emitting area includes a plurality of color sub-pixels emitting light, for example, all sub-pixels in the second target light emitting area emit light, that is, all the RGB sub-pixels emit light, wherein the gray scale of the light emitting sub-pixels in the same test frame is the same. The second target luminous area is set to be lightened by all the sub-pixels, so that the problems that black pictures are too many and the extracted brightness information is not high enough are solved, and the test picture can be more similar to the real brightness.

In some embodiments, the number of sub-pixels included in the first chrominance extraction sub-region and the second chrominance extraction sub-region is the same, that is, the number of sub-pixels of the second target light emitting region in the first test picture occupies 1/2 of the number of all sub-pixels of the first test picture, and the number of sub-pixels of the second target light emitting region in the second test picture also occupies 1/2 of the number of all sub-pixels of the second test picture, so that the influence of IR drop on luminance extraction can be avoided, and the extracted luminance and chrominance information can be more accurate.

S120, extracting a first brightness average value of a first light-emitting area, a second brightness average value of a second light-emitting area and a third brightness average value of a third light-emitting area in the chromaticity extraction area according to the target shooting picture.

Specifically, step S120 may be understood that after the photographing obtains the target photographing picture, since the display area of the display panel is divided into a plurality of chromaticity extraction areas, the target photographing picture is also divided into a plurality of chromaticity extraction areas, so that the luminance average value of the first light emitting area in each chromaticity extraction area in the target photographing picture may be extracted, where the luminance average value may be referred to as a first luminance average value, the luminance average value of the second light emitting area may be referred to as a second luminance average value, the luminance average value of the third light emitting area may be referred to as a third luminance average value, and the luminance average value of the R light emitting area, the luminance average value of the G light emitting area, and the luminance average value of the B light emitting area are obtained. Because the first light-emitting area, the second light-emitting area and the third light-emitting area are separated by the non-light-emitting area, a certain interval can be kept, so that the purity of the extracted luminance data is higher, and more accurate chromaticity data in each extracted area can be obtained according to the first luminance average value, the second luminance average value and the third luminance average value.

S130, determining the chromaticity value of each chromaticity extraction area according to the first brightness average value, the second brightness average value and the third brightness average value.

Specifically, step S130 may be understood as that, after obtaining the luminance average value of the R light emitting region, the luminance average value of the G light emitting region, and the luminance average value of the B light emitting region of each chromaticity extraction region, the chromaticity value=first luminance average value of each chromaticity extraction region may be determined: the second luminance average value: and the third brightness average value, thereby realizing the accurate extraction of the chromaticity data.

In the chromaticity extraction method provided by the embodiment of the application, when the display panel displays the test picture, the target shooting picture is obtained by shooting the display area of the display panel by using a black-and-white camera, when the display panel displays the test picture, the display area of the display panel is divided into a plurality of chromaticity extraction areas, each chromaticity extraction area comprises a first target luminous area and a non-luminous area, the first target luminous area comprises a first luminous area, a second luminous area and a third luminous area with different luminous colors, for example, the first luminous area is an area with only R sub-pixels, the second luminous area is an area with only G sub-pixels, the third luminous area is an area with only B sub-pixels, all the sub-pixels in the non-light-emitting area do not emit light, and the adjacent first target light-emitting areas are separated by the non-light-emitting area, so that the purpose of keeping a certain distance among the first light-emitting area, the second light-emitting area and the third light-emitting area is achieved, the problem of mutual interference among R, G, B light-emitting areas is solved, higher-purity brightness data can be extracted, then a first brightness average value of the first light-emitting area, a second brightness average value of the second light-emitting area and a third brightness average value of the third light-emitting area in the chromaticity extraction area can be extracted, more accurate chromaticity data can be obtained according to the brightness data, and the chromaticity value=first brightness average value of each chromaticity extraction area is determined: the second luminance average value: and the third brightness average value realizes the accurate extraction of the chromaticity information.

In some embodiments, as shown in fig. 9, after determining the chrominance value of each chrominance extraction area according to the first luminance average, the second luminance average and the third luminance average, the chrominance extraction method further includes step S140:

S140, determining a reference chromaticity value according to the chromaticity value of the chromaticity extraction area at the preset position; and determining a chromaticity deviation result of the target shooting picture based on the reference chromaticity value.

Preferably, the preset position is a center position of the display area;

And determining the chromaticity average value of the plurality of chromaticity extraction areas at the central position as a reference chromaticity value.

The center position refers to a position area at the center of the display area, and at least comprises a chromaticity extraction area at the center, for example, the center position can be a circular area with the diameter of 10mm or a rectangular area with the side length of 5mm, and the shape of the area can be set according to requirements.

Specifically, after the chromaticity data is extracted, the color cast condition of the whole screen can be judged, the reference chromaticity value can be determined according to the chromaticity value of the chromaticity extraction area at the preset position, for example, the preset position is the center position of the display area, the chromaticity value of one chromaticity extraction area at the center position can be taken as the reference chromaticity value, the chromaticity average value of a plurality of chromaticity extraction areas at the center position can be taken as the reference chromaticity value, that is, the chromaticity of a plurality of chromaticity extraction areas at the center position is taken as the standard, the judgment of the chromaticity deviation result can be more accurate, and then the reference chromaticity value can be taken as the standard, so that the chromaticity deviation result of the target shooting picture can be determined, for example, the chromaticity deviation result is: red on the left, normal white in the middle, green on the right.

In some embodiments, as shown in fig. 10, the method for extracting chromaticity further includes step S150:

S150, determining a chromaticity compensation value corresponding to a target gray level value in a preset gray level value range according to a chromaticity deviation result corresponding to an Nth gray level picture;

Preferably, step S150 determines, according to a chromaticity deviation result corresponding to the nth gray-scale frame, a chromaticity compensation value corresponding to the target gray-scale value in the preset gray-scale value range, including:

Specifically, the "chromaticity compensation value at each target gray-scale value" may be obtained through 256 test pictures, or may be obtained through one 255 gray-scale test picture, or may also be obtained through two test pictures, for example, one 255 gray-scale picture and one 128 gray-scale picture.

In one embodiment, the process of obtaining the "chromaticity compensation value at the target gray-scale value" through two test pictures is as follows: determining a chromaticity deviation result under 255 gray scales, determining a chromaticity compensation value under 255 gray scales according to the chromaticity deviation result, determining a chromaticity deviation result under 128 gray scales, determining a chromaticity compensation value under 128 gray scales according to the chromaticity deviation result, and determining a chromaticity compensation value under a target gray scale according to a linear change rule of the chromaticity deviation degree. For example: "chroma compensation value=k×gray-scale value", the chroma compensation value under 255 gray-scale and the chroma compensation value under 128 gray-scale can be substituted into the formula to obtain a constant value of the slope k, which is equivalent to determining the "corresponding relationship between the preset gray-scale value and the chroma compensation value". Therefore, the compensation chromaticity value under each gray level in the range of 0-255 gray levels can be obtained through twice photographing, so that not only is the accuracy of brightness and chromaticity compensation ensured, but also the efficiency is improved.

In one example, the chromaticity extraction flow is as follows:

1) A special test picture is made for extracting color brightness information, for example fig. 6-a. Dividing the screen into M multiplied by N areas according to the resolution of the screen body, namely dividing the screen into M multiplied by N chromaticity extraction areas, wherein each chromaticity extraction area is internally provided with a group of R, G, B pixel points surrounded by a black frame, and the information containing the R/G/B real proportion can be extracted through a single photo taken at one time;

2) Sending the test picture to a display panel for display, and starting Demura black-and-white cameras for photographing to obtain a first photographing picture;

3) Making another picture complementary to the picture in the picture 6-a, for example, sending the picture to the display panel for display, starting Demura a black-and-white camera for photographing, and obtaining a second photographing picture;

4) Combining the first shooting picture with the second shooting picture to obtain a target shooting picture, as shown in fig. 7, shooting again after moving the position of the R/G/B picture in a single chromaticity extraction area when testing the picture, and synthesizing the data generated by shooting twice, so that the problem of inaccurate acquired brightness data caused by the influence of IR drop can be solved;

5) Calculating chromaticity data of each chromaticity extraction area in the target shooting picture;

6) R in chromaticity extraction area at screen center point position: g: b chromaticity data is used as reference chromaticity, and R of the rest chromaticity extraction areas is calculated according to the reference chromaticity: g: and B and the reference chromaticity, and correcting Demura compensation data according to the coefficient so as to achieve the aim of repairing the color cast of the screen body.

In the embodiment of the application, the chromaticity information on the display screen is acquired through the black-and-white camera in the conventional Demura equipment, and the problem of color cast of the screen body is repaired according to the chromaticity information, so that the automation of the repairing process can be realized, and the yield loss caused by color cast is solved.

In another example, the chromaticity extraction area of the display panel is divided into three sub-areas, a complete test picture is split into three sub-pictures, when the display panel displays the three test sub-pictures respectively, the display area of the display panel is photographed, three photographed pictures can be obtained, the first target light emitting area and the non-light emitting area in the first chromaticity extraction sub-area of the first photographed picture, the first target light emitting area and the non-light emitting area in the second chromaticity extraction sub-area of the second photographed picture, and the first target light emitting area and the non-light emitting area in the third chromaticity extraction sub-area of the third photographed picture are combined, so that a target photographed picture can be obtained, and the rest chromaticity extraction sub-areas which are not combined are all the second target light emitting areas, namely sub-pixels are all bright, so that the influence of IR drop can be further reduced, and the extracted brightness data is more accurate. In the embodiment of the present application, the test frame may be split into N test sub-frames, and correspondingly, the chromaticity extraction area may also be divided into N chromaticity extraction sub-areas, where N may be valued according to the requirement, which is not limited in the embodiment of the present application.

Based on the same inventive concept, the embodiment of the present application further provides a device for extracting chromaticity, as shown in fig. 11, the device 1100 may include a photographing module 1110, an extracting module 1120, and a determining module 1130:

The photographing module 1110 is configured to photograph a display area of a display panel to obtain a target photographing image when the display panel displays a test image, where the display area of the display panel includes at least one chromaticity extraction area, the chromaticity extraction area includes a first target light-emitting area and a non-light-emitting area, the first target light-emitting area includes a first light-emitting area, a second light-emitting area, and a third light-emitting area with different light-emitting colors, and the first light-emitting area, the second light-emitting area, and the third light-emitting area are separated by the non-light-emitting area;

The extracting module 1120 is configured to extract, according to the target captured image, a first luminance average value of the first light-emitting region, a second luminance average value of the second light-emitting region, and a third luminance average value of the third light-emitting region in the chromaticity extracting region;

The determining module 1130 is configured to determine a chromaticity value of each chromaticity extraction region according to the first luminance average value, the second luminance average value, and the third luminance average value.

In the chromaticity extraction device provided by the embodiment of the application, when a display panel displays a test picture, a target shooting picture is obtained by shooting a display area of the display panel by using a black-and-white camera, when the display panel displays the test picture, the display area of the display panel is divided into a plurality of chromaticity extraction areas, each chromaticity extraction area comprises a first target light-emitting area and a non-light-emitting area, the first target light-emitting area comprises a first light-emitting area, a second light-emitting area and a third light-emitting area with different light-emitting colors, for example, the first light-emitting area is an area with R sub-pixel light emission only, the second light-emitting area is an area with G sub-pixel light emission only, the third light-emitting area is an area with B sub-pixel light emission only, all sub-pixels in the non-light-emitting area do not emit light, and adjacent first target light-emitting areas are separated by the non-light-emitting areas, so that the purposes of maintaining a certain distance between the first light-emitting area, the second light-emitting area and the third light-emitting area are maintained, mutual interference between R, G, B light-emitting areas is solved, higher-purity brightness data can be extracted, then the first luminance data with a second luminance value and a luminance value of the first luminance value in the chromaticity extraction area can be extracted, and the second luminance value of the luminance value is determined according to the average value of the first luminance value of the luminance value, and the luminance value of the luminance value is determined: the second luminance average value: and the third brightness average value realizes the accurate extraction of the chromaticity information.

In some embodiments, the first light emitting region comprises a plurality of first color sub-pixels that emit light, the second light emitting region comprises a plurality of second color sub-pixels that emit light, the third light emitting region comprises a plurality of third color sub-pixels that emit light, and the non-light emitting region comprises a plurality of sub-pixels that do not emit light;

In some embodiments, the test frames include a first test frame and a second test frame, and when the display panel displays the first test frame and the second test frame, the positions of the first target light emitting areas of the display panel are different; the photographing module 1110 may be specifically configured to:

In some embodiments, the chroma extraction region includes a first chroma extraction region and a second chroma extraction region; the second chromaticity extraction subarea of the first shooting picture comprises a first target luminous area and a non-luminous area; the first chrominance extraction subarea of the second shooting picture comprises a first target luminous area and a non-luminous area; the photographing module 1110 may specifically be further configured to:

combining the second chromaticity extraction subarea of the first shooting picture with the first chromaticity extraction subarea of the second shooting picture to obtain a target shooting picture;

preferably, the second target light emitting region includes a plurality of color sub-pixels emitting light.

In some embodiments, the determination module 1130 may also be configured to:

and determining a chromaticity deviation result of the target shooting picture based on the reference chromaticity value.

Preferably, the preset position is a center position of the display area;

And determining the chromaticity mean value as a reference chromaticity value.

In some embodiments, the determination module 1130 may also be configured to:

And determining a chromaticity compensation value corresponding to the target gray level value in the preset gray level value range according to the chromaticity deviation result corresponding to the Nth gray level picture.

The modules in the chromaticity extraction device provided by the embodiment of the application can realize the functions of the steps of the chromaticity extraction method provided by fig. 1 to 10 and achieve the corresponding technical effects, and are not described in detail herein for brevity.

Fig. 12 is a schematic hardware structure of a chromaticity extraction device according to an embodiment of the present application.

The extraction device at the chromaticity may comprise a processor 1201 and a memory 1202 storing computer program instructions.

In particular, the processor 1201 may include a central processing unit (Central Processing Unit, CPU), or Application SPECIFIC INTEGRATED Circuit (ASIC), or may be configured as one or more integrated circuits that implement embodiments of the present application.

Memory 1202 may include mass storage for data or instructions. By way of example, and not limitation, memory 1202 may include a hard disk drive (HARD DISK DRIVE, HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or a universal serial bus (Universal Serial Bus, USB) drive, or a combination of two or more of the foregoing. Memory 1202 may include removable or non-removable (or fixed) media where appropriate. The memory 1202 may be internal or external to the chromaticity extraction device, where appropriate. In a particular embodiment, the memory 1202 is a non-volatile solid-state memory.

The memory may include Read Only Memory (ROM), random access memory (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 methods in accordance with aspects of the present disclosure.

The processor 1201 implements the chromaticity extraction method of any of the above embodiments by reading and executing computer program instructions stored in the memory 1202.

In one example, the chromaticity extraction device may also include a communication interface 1203 and a bus 1204. As shown in fig. 12, the processor 1201, the memory 1202, and the communication interface 1203 are connected to each other via a bus 1204 and perform communication with each other.

The communication interface 1203 is mainly used for implementing communication among the modules, devices, units and/or apparatuses in the embodiment of the present application.

Bus 1204 includes hardware, software, or both, that couples the components of the chromaticity extraction 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 (LINEAR PREDICTIVE Coding, LPC) Bus, a memory Bus, a micro channel architecture (Micro Channel Architecture, MCA) Bus, a peripheral component interconnect (PERIPHERAL COMPONENT INTERCONNECT, PCI) Bus, a PCI-Express (PERIPHERAL COMPONENT INTERCONNECT-X, PCI-X) Bus, a serial advanced technology attachment (SERIAL ADVANCED Technology Attachment, SATA) Bus, a video electronics standards Association Local Bus (VLB) Bus, or other suitable Bus, or a combination of two or more of these. Bus 1204 may include one or more buses, where appropriate. Although embodiments of the application have been described and illustrated with respect to a particular bus, the application contemplates any suitable bus or interconnect.

The apparatus may perform the chromaticity extraction method in the embodiment of the present application based on the respective units/parts in the chromaticity extraction device, thereby implementing the chromaticity extraction method described in connection with fig. 1 to 10.

In addition, in combination with the method for extracting chromaticity in the above embodiment, the embodiment of the present application may be implemented by providing a computer storage medium. The computer storage medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement the method of extracting chromaticity in any of the above embodiments.

The application also provides a computer program product in which instructions, when executed by a processor of a chromaticity extraction device, cause the chromaticity extraction device to perform the various processes of implementing any of the chromaticity extraction method embodiments described above.

It should be understood that the application is not limited to the particular arrangements and instrumentality described above and shown 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. The method processes of the present application are not limited to the specific steps described and shown, but various changes, modifications and additions, or the order between steps may be made by those skilled in the art 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, application SPECIFIC INTEGRATED Circuit (ASIC), appropriate firmware, plug-in, function card, or the like. When implemented in software, the elements of the 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, read-Only Memory (ROM), flash Memory, erasable Read-Only Memory (Erasable Read Only Memory, EROM), floppy disks, compact discs (Compact Disc Read-Only Memory, CD-ROM), optical discs, hard disks, fiber optic media, radio Frequency (RF) links, and so forth. 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 disclosure describe some methods or systems based on a series of steps or devices. 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, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.

Aspects of the present disclosure 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 disclosure. 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 equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and they should be included in the scope of the present application.

Claims

1. A method for extracting chromaticity, comprising:

Under the condition that a display panel displays a test picture, photographing a display area of the display panel to obtain a target photographing picture, wherein when the display panel displays the test picture, the display area of the display panel comprises at least one chromaticity extraction area, the chromaticity extraction area comprises a first target luminous area and a non-luminous area, the first target luminous area comprises a first luminous area, a second luminous area and a third luminous area with different luminous colors, and the first luminous area, the second luminous area and the third luminous area are separated by the non-luminous area;

Extracting a first luminance average value of the first light-emitting area, a second luminance average value of the second light-emitting area and a third luminance average value of the third light-emitting area in the chromaticity extraction area according to the target shooting picture;

2. The method of claim 1, wherein the first light emitting region comprises a plurality of first color sub-pixels that emit light, the second light emitting region comprises a plurality of second color sub-pixels that emit light, the third light emitting region comprises a plurality of third color sub-pixels that emit light, and the non-light emitting region comprises a plurality of sub-pixels that do not emit light;

preferably, the number of the sub-pixels of the first light emitting region, the number of the sub-pixels of the second light emitting region, and the number of the sub-pixels of the third light emitting region are equal.

3. The method of claim 1, wherein the test frame comprises a first test frame and a second test frame, and wherein the display panel displays the first test frame and the second test frame at different locations of a first target light emitting area of a display area of the display panel; under the condition that the display panel displays the test picture, photographing the display area of the display panel to obtain a target photographing picture, wherein the photographing process comprises the following steps:

photographing the first test picture to obtain a first photographing picture;

photographing the second test picture to obtain a second photographing picture;

And combining the first shooting picture with the second shooting picture to obtain the target shooting picture.

4. A method according to claim 3, wherein the chrominance extraction region comprises a first chrominance extraction sub-region and a second chrominance extraction sub-region; the second chromaticity extraction subarea of the first shooting picture comprises the first target luminous area and the non-luminous area; the first chrominance extraction subarea of the second shooting picture comprises the first target luminous area and the non-luminous area; the combining the first shooting picture and the second shooting picture to obtain the target shooting picture includes:

Preferably, the first color extraction subarea of the first shooting picture is a second target luminous area; the second chromaticity extraction subarea of the second shooting picture is a second target luminous area;

preferably, the first chrominance extraction sub-region and the second chrominance extraction sub-region include the same number of sub-pixels;

5. The method of claim 1, wherein after said determining the chrominance value of each said chrominance extraction region from said first luminance mean, said second luminance mean, and said third luminance mean, said method further comprises:

Determining a reference chromaticity value according to the chromaticity value of the chromaticity extraction region at a preset position;

preferably, the preset position is a center position of the display area;

preferably, the central location comprises a plurality of the chrominance extraction regions; the determining a reference chroma value according to the chroma value of the chroma extraction area at a preset position includes:

determining a chromaticity mean of the plurality of chromaticity extraction regions at the center position;

And determining the chromaticity mean value as a reference chromaticity value.

6. The method of claim 1, wherein the test frame comprises an nth gray scale frame, the gray scale value of a subpixel that emits light in the nth gray scale frame being an nth gray scale value, wherein N is a positive integer greater than 0;

preferably, the nth gray scale value further includes a preset middle gray scale value in the gray scale value range.

7. The method as recited in claim 6, further comprising:

determining a chromaticity compensation value corresponding to a target gray level value in the preset gray level value range according to a chromaticity deviation result corresponding to the Nth gray level picture;

determining a chromaticity compensation value corresponding to the maximum gray level value according to a chromaticity deviation result corresponding to the maximum gray level value;

determining a chromaticity compensation value corresponding to the intermediate gray-scale value according to a chromaticity deviation result corresponding to the intermediate gray-scale value;

Determining the corresponding relation between the gray-scale value and the chromaticity compensation value according to the chromaticity compensation value corresponding to the maximum gray-scale value and the chromaticity compensation value corresponding to the intermediate gray-scale value;

8. A chromaticity extraction device, comprising:

The photographing module is used for photographing a display area of the display panel to obtain a target photographing picture under the condition that the display panel displays a test picture, wherein when the display panel displays the test picture, the display area of the display panel comprises at least one chromaticity extraction area, the chromaticity extraction area comprises a first target luminous area and a non-luminous area, the first target luminous area comprises a first luminous area, a second luminous area and a third luminous area which have different luminous colors, and the first luminous area, the second luminous area and the third luminous area are separated by the non-luminous area;

The extraction module is used for extracting a first brightness average value of the first luminous area, a second brightness average value of the second luminous area and a third brightness average value of the third luminous area in the chromaticity extraction area according to the target shooting picture;

9. A chromaticity extraction apparatus, comprising:

a processor and a memory storing computer program instructions which, when executed, implement the chromaticity extraction method as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method of extracting chromaticity as claimed in any one of claims 1 to 7.