CN110662022A - Color gamut adjusting system and color gamut adjusting method - Google Patents
Color gamut adjusting system and color gamut adjusting method Download PDFInfo
- Publication number
- CN110662022A CN110662022A CN201910932144.3A CN201910932144A CN110662022A CN 110662022 A CN110662022 A CN 110662022A CN 201910932144 A CN201910932144 A CN 201910932144A CN 110662022 A CN110662022 A CN 110662022A
- Authority
- CN
- China
- Prior art keywords
- color gamut
- color
- system corresponding
- coordinate system
- adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2003—Display of colours
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
Abstract
The application discloses a color gamut adjusting system and a color gamut adjusting method, wherein the method comprises the following steps: 1) the testing steps are as follows: displaying a test image on a display screen to be tested, and testing the chromaticity of the display screen to obtain a first color gamut of the display screen; 2) a comparison step: comparing the first color gamut with the standard color gamut, and finishing the color gamut adjustment when the difference value between the first color gamut and the standard color gamut is less than or equal to a first threshold value; when the difference value between the first color gamut and the standard color gamut is larger than a first threshold value, adjusting a color gamut adjusting matrix of the display screen; 3) and repeating the testing step and the comparing step, and adjusting the first color gamut of the display screen by continuously adjusting the color gamut adjusting matrix until the difference value between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to a first threshold value. According to the method and the device, the first color gamut of the display screen is adjusted by continuously adjusting the color gamut adjusting matrix through repeated testing steps and comparison steps, so that automatic color gamut debugging is realized, and the factory debugging efficiency of the display screen is improved.
Description
Technical Field
The present disclosure relates to but not limited to the field of display technologies, and in particular, to a color gamut adjusting system and a color gamut adjusting method.
Background
The color gamut refers to a range region constituted by the number of colors that the display device can express. The colors of the visible spectrum in nature constitute the largest gamut space that encompasses all the colors visible to the human eye. The display technology is a medium for displaying information, and displaying the original color of an object to the maximum extent is a goal continuously pursued by high-quality display equipment, which requires further improvement of the color gamut of a display product.
At present, when a display screen provided by the related technology is delivered from a factory for debugging, whether display parameters such as color gamut and color temperature meet the requirements of a test standard or not needs to be tested, if the display parameters do not meet the requirements of the test standard, the display parameters need to be manually and repeatedly modified and debugged until the display parameters meet the requirements of the test standard, and the process is very complicated.
Disclosure of Invention
The application provides a color gamut adjusting system and a color gamut adjusting method, which can realize automatic color gamut debugging.
In a first aspect, an embodiment of the present application provides a color gamut adjusting method, including:
the testing steps are as follows: displaying a test image on a display screen to be tested, and testing the chromaticity of the display screen to obtain a first color gamut of the display screen;
a comparison step: comparing the first color gamut with the standard color gamut, and finishing the color gamut adjustment when the difference value between the first color gamut and the standard color gamut is less than or equal to a first threshold value; when the difference value between the first color gamut and the standard color gamut is larger than a first threshold value, adjusting a color gamut adjusting matrix of the display screen;
and repeating the testing step and the comparing step, and adjusting the first color gamut of the display screen by continuously adjusting the color gamut adjusting matrix of the display screen until the difference value between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to a first threshold value.
Optionally, the comparing step specifically includes:
obtaining the vertex coordinates of RGB in the color coordinate system corresponding to the first color gamut;
and comparing the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut with the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut, when the difference value between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is less than or equal to a first threshold value, no color gamut adjustment is needed, and when the difference value between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is greater than the first threshold value, the color gamut adjustment matrix of the display screen is adjusted.
Optionally, the color gamut adjustment matrix is
When the difference between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is greater than the first threshold, adjusting the color gamut adjustment matrix of the display screen specifically includes:
adjusting a value of at least one of a2 and a3 based on a first adjustment width when a distance between an R vertex coordinate of a color coordinate system corresponding to the first color gamut and an R vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
adjusting a value of at least one of b1 and b3 based on a first adjustment magnitude when a distance between a G vertex coordinate of a color coordinate system corresponding to the first color gamut and a G vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut is greater than the first threshold value, the value of at least one of c1 and c2 is adjusted based on the first adjustment width.
Optionally, the initial value of the color gamut adjusting matrix is
The first adjustment amplitude is 0.1.
Optionally, when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is below the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a2 based on the first adjustment width; when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is above the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a3 based on the first adjustment width;
when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is on the left of the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of b1 based on the first adjustment amplitude; when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward from the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of b3 based on the first adjustment width;
when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is above the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of c1 based on the first adjustment width; and when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is below the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of c2 based on the first adjustment width.
Optionally, the setting rule further includes any one or a combination of two of the following items:
when the distance between the R vertex coordinate of the color coordinate system corresponding to the first color gamut and the R vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of a1 based on the first adjustment amplitude;
when the distance between the G vertex coordinate of the color coordinate system corresponding to the first color gamut and the G vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of b2 based on the first adjustment amplitude;
and when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of c3 based on the first adjustment amplitude.
Optionally, the adjusting the value of a1 includes: when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward from the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of a1 based on the first adjustment width; increasing the value of a1 based on the first adjustment width when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is to the left of the R vertex coordinate of the color coordinate system corresponding to the standard color gamut;
the adjusting the value of b2 includes: when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is above the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of b2 based on the first adjustment width; increasing the value of b2 based on the first adjustment width when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is below the G vertex coordinate of the color coordinate system corresponding to the standard color gamut;
the adjusting the value of c3 includes: when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward from the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of c3 based on the first adjustment width; and increasing the value of c3 based on the first adjustment width when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is to the left of the B vertex coordinate of the color coordinate system corresponding to the standard color gamut.
Optionally, the test image at least includes three R/G/B groups, where the R group includes a red picture of full 255 gray scale, the G group includes a green picture of full 255 gray scale, and the B group includes a blue picture of full 255 gray scale.
Optionally, the test image at least includes three R/G/B groups, where the R group includes a plurality of red frames with preset gray scale values, the G group includes a plurality of green frames with preset gray scale values, the B group includes a plurality of blue frames with preset gray scale values, the preset gray scale values include a full 255 gray scale, and further include one or more values between 0 and 254.
On the other hand, the embodiment of the present application further provides a color gamut adjusting system, including a colorimeter and a controller, wherein:
a colorimeter for repeatedly performing a second testing step, the second testing step comprising: receiving a test notification of the controller, testing the chromaticity of the display screen to be tested to obtain a first color gamut of the display screen and outputting the first color gamut to the controller;
the controller is used for repeatedly executing the first testing step and the comparing step, and adjusting the first color gamut of the display screen by continuously adjusting the color gamut adjusting matrix of the display screen until the difference value between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to a first threshold value; the first testing step comprises: displaying a test image on a display screen to be tested, and sending a test notice to a colorimeter; the comparing step includes: receiving a first color gamut of a display screen output by a colorimeter, comparing the first color gamut with a standard color gamut, and finishing color gamut adjustment when the difference value between the first color gamut and the standard color gamut is less than or equal to a first threshold value; and when the difference value between the first color gamut and the standard color gamut is larger than a first threshold value, adjusting a color gamut adjusting matrix of the display screen.
Optionally, the standard color gamut is an sRGB standard color gamut.
Compared with the related art, the color gamut adjusting system and the color gamut adjusting method provided by the embodiment of the application adjust the first color gamut of the display screen by repeating the testing step and the comparing step and continuously adjusting the color gamut adjusting matrix of the display screen until the difference value between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to the first threshold value, so that the automatic color gamut debugging is realized, and the factory debugging efficiency of the display screen is improved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification, claims, and drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a schematic flowchart of an exemplary color gamut adjusting method according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a comparison between an exemplary test color gamut pattern and a standard color gamut pattern according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an exemplary color gamut adjusting system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Unless otherwise defined, technical or scientific terms used in the disclosure of the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar terms in the embodiments of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that a particular element or item appears in front of the word or is detected by mistake, and that the word or item appears after the word or item and its equivalents, but does not exclude other elements or misdetections.
An embodiment of the present application provides a color gamut adjusting method, as shown in fig. 1, the color gamut adjusting method provided in the embodiment of the present application includes the following steps:
step 100, testing: displaying a test image on a display screen to be tested, and testing the chromaticity of the display screen to obtain a first color gamut of the display screen;
optionally, the test image at least includes three R/G/B groups, where the R group includes a red picture of full 255 gray scale, the G group includes a green picture of full 255 gray scale, and the B group includes a blue picture of full 255 gray scale.
Optionally, the test image at least includes three R/G/B groups, where the R group includes a plurality of red frames with preset gray scale values, the G group includes a plurality of green frames with preset gray scale values, the B group includes a plurality of blue frames with preset gray scale values, the preset gray scale values include a full 255 gray scale, and further include one or more values between 0 and 254.
It should be noted that three R/G/B groups can obtain three vertexes of a triangle of the color gamut map by performing chromaticity measurement according to a full 255 gray scale; by measuring the chromaticity of the test images of other gray scales, the obtained color gamut map can be more accurate, specifically, the preset gray scale values of the test images of each group can be respectively increased by a fixed value from the initial gray scale value, for example: the preset gray scale values of the test images of each set may be 0, 5, 10, 15, 20 … …, respectively.
Step 200, comparison step: comparing the first color gamut with the standard color gamut, and finishing the color gamut adjustment when the difference value between the first color gamut and the standard color gamut is less than or equal to a first threshold value; when the difference value between the first color gamut and the standard color gamut is larger than a first threshold value, adjusting a color gamut adjusting matrix of the display screen;
optionally, the comparing step specifically includes:
obtaining the vertex coordinates of RGB in a color coordinate system corresponding to the first color gamut;
and when the difference value between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is larger than the first threshold value, the color gamut adjusting matrix of the display screen is adjusted.
Optionally, the gamut adjustment matrix is
Wherein:
at least one of a1, b2 and c3 is 1, and a1, a2, a3, b1, b2, b3, c1, c2 and c3 are all numbers which are greater than or equal to 0 and less than or equal to 1;
the initial value of the adjustment matrix is
Optionally, when a difference between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is greater than a first threshold, adjusting the color gamut adjusting matrix of the display screen specifically includes:
adjusting a value of at least one of a2 and a3 based on a first adjustment width when a distance between an R vertex coordinate of a color coordinate system corresponding to the first color gamut and an R vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
adjusting a value of at least one of b1 and b3 based on a first adjustment magnitude when a distance between a G vertex coordinate of a color coordinate system corresponding to the first color gamut and a G vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut is greater than the first threshold value, the value of at least one of c1 and c2 is adjusted based on the first adjustment width.
Alternatively, the first adjustment amplitude may be 0.1. Each time the parameter is adjusted, it may be increased by 0.1 or decreased by 0.1.
As shown in fig. 2, assuming that the R vertex coordinate of the color coordinate system corresponding to the first color gamut is right below the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, the abscissa x needs to be decreased by a little, and the ordinate y needs to be increased by a little; in the RGB triangle, adding R, G, B a certain component will move the whole gamut diagram (triangle) from the center direction to the top angle direction of the added component, therefore, if the abscissa x needs to be decreased a little and the ordinate y needs to be increased a little, it can be realized by adding G component, according to the matrix multiplication, i.e. it needs to adjust the a2 parameter in the matrix to increase a little. a2 is initially 0, the first adjustment amplitude is 0.1, the first adjustment is to increase a2, the value of a2 is 0.1, the chromaticity is tested again to obtain a new color gamut, the color gamut adjustment is stopped if the condition is met, the color gamut adjustment is performed again if the condition is not met, the second adjustment is assumed to increase a2, the second adjustment is performed until a2 is 0.2, and the adjustment is circulated until the condition is met. And continuously adjusting the parameters of the color gamut adjusting matrix according to the horizontal and vertical coordinates to enable the test color gamut graph to be close to the standard color gamut graph. The adjustment process of other parameters of the color gamut adjustment matrix is similar to that described above, and will not be described herein again.
Optionally, when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is below the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a2 based on the first adjustment width; when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is above the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a3 based on the first adjustment width;
when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is on the left of the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of b1 based on the first adjustment amplitude; adjusting the value of b3 based on the first adjustment width when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is to the right of the G vertex coordinate of the color coordinate system corresponding to the standard color gamut;
when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is above the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of c1 based on the first adjustment width; when the B-vertex coordinates of the color coordinate system corresponding to the first gamut are below the B-vertex coordinates of the color coordinate system corresponding to the standard gamut, the value of c2 is adjusted based on the first adjustment width.
Optionally, adjusting the color gamut adjusting matrix of the display screen further includes any one or a combination of two of the following:
when the distance between the R vertex coordinate of the color coordinate system corresponding to the first color gamut and the R vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of a1 based on the first adjustment amplitude;
when the distance between the G vertex coordinate of the color coordinate system corresponding to the first color gamut and the G vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of b2 based on the first adjustment amplitude;
when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold, the value of c3 is adjusted based on the first adjustment width.
In the adjustment of a1, b2, and c3, at least one of a1, b2, and c3 needs to be kept at 1.
Optionally, adjusting the value of a1 includes: when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward of the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of a1 based on the first adjustment width; increasing the value of a1 based on the first adjustment width when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is to the left of the R vertex coordinate of the color coordinate system corresponding to the standard color gamut;
adjusting the value of b2, including: when the G vertex coordinates of the color coordinate system corresponding to the first color gamut are above the G vertex coordinates of the color coordinate system corresponding to the standard color gamut, decreasing the value of b2 based on the first adjustment width; increasing the value of b2 based on the first adjustment width when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is below the G vertex coordinate of the color coordinate system corresponding to the standard color gamut;
adjusting the value of c3, including: decreasing the value of c3 based on the first adjustment width when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is to the right of the B vertex coordinate of the color coordinate system corresponding to the standard color gamut; when the B-vertex coordinates of the color coordinate system corresponding to the first gamut are to the left of the B-vertex coordinates of the color coordinate system corresponding to the standard gamut, the value of c3 is increased based on the first adjustment width.
Step 300, repeating the testing step and the comparing step, and adjusting the first color gamut of the display screen by continuously adjusting the color gamut adjusting matrix of the display screen until the difference value between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to the first threshold value and less than or equal to the first threshold value.
Based on the same inventive concept, some embodiments of the present application further provide a color gamut adjusting system, as shown in fig. 3, the color gamut adjusting system provided by the embodiments of the present application includes: a colorimeter 10 and a controller 20.
Specifically, the colorimeter 10 is configured to repeatedly perform a second testing step, where the second testing step includes: receiving the test notification from the controller 20, testing the chromaticity of the display screen 30 to be tested to obtain a first color gamut of the display screen 30, and outputting the first color gamut to the controller 20;
the controller 20 is configured to repeatedly perform the first testing step and the comparing step, and adjust the first color gamut of the display screen by continuously adjusting the color gamut adjusting matrix of the display screen until a difference between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to a first threshold; the first testing step includes: displaying a test image on a display screen 30 to be tested, and sending a test notification to the colorimeter 10; the comparison step comprises: receiving a first color gamut of the display screen 30 output by the colorimeter 10, comparing the first color gamut with a standard color gamut, and when a difference value between the first color gamut and the standard color gamut is less than or equal to a first threshold value, finishing color gamut adjustment; when the difference between the first color gamut and the standard color gamut is greater than the first threshold, the color gamut adjustment matrix of the display screen 30 is adjusted.
According to the color gamut adjusting system provided by the embodiment of the application, through feedback cooperation among the colorimeter 10, the controller 20 and the display screen 30, when the difference value between the first color gamut and the standard color gamut is less than or equal to the first threshold value, the test is stopped; when the difference value between the first color gamut of the adjusted display screen and the standard color gamut is larger than a first threshold value, the color gamut adjusting matrix is adjusted, the testing process and the comparing process are circulated until the difference value between the first color gamut and the standard color gamut is smaller than or equal to the first threshold value, so that a feedback system is formed, the display color gamut of the display screen is automatically corrected, and the factory debugging efficiency of the display screen is improved.
Optionally, the test image at least includes three R/G/B groups, where the R group includes a red picture of full 255 gray scale, the G group includes a green picture of full 255 gray scale, and the B group includes a blue picture of full 255 gray scale.
Optionally, the test image at least includes three R/G/B groups, where the R group includes a plurality of red frames with preset gray scale values, the G group includes a plurality of green frames with preset gray scale values, the B group includes a plurality of blue frames with preset gray scale values, the preset gray scale values include a full 255 gray scale, and further include one or more values between 0 and 254.
It should be noted that three R/G/B groups can obtain three vertexes of a triangle of the color gamut map by performing chromaticity measurement according to a full 255 gray scale; by measuring the chromaticity of the test images of other gray scales, the obtained color gamut map can be more accurate, specifically, the preset gray scale values of the test images of each group can be respectively increased by a fixed value from the initial gray scale value, for example: the preset gray scale values of the test images of each set may be 0, 5, 10, 15, 20 … …, respectively.
Optionally, the gamut adjustment matrix is
Wherein:
at least one of a1, b2 and c3 is 1, and a1, a2, a3, b1, b2, b3, c1, c2 and c3 are all numbers which are greater than or equal to 0 and less than or equal to 1;
the initial value of the gamut adjustment matrix is
Specifically, assume that the input RGB pixel value is (1, 0, 0), and initially, the output RGB pixel value is
Assuming that the value of the gamut adjustment matrix becomes after a period of adjustment
The output RGB pixel values (i.e., the RGB pixel values after the gamut adjustment) are
Optionally, the standard color gamut is an sRGB standard color gamut.
It should be noted that the standard color gamut in the present application may also be other standard color gamuts (e.g., Adobe RGB standard color gamut, CIE 1931 standard color gamut, etc.) or custom standard color gamuts.
Optionally, the comparing step of the controller 20 specifically includes:
obtaining the vertex coordinates of RGB in a color coordinate system corresponding to the first color gamut;
and when the difference value between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is larger than the first threshold value, the color gamut adjusting matrix of the display screen is adjusted.
Optionally, when a difference between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is greater than a first threshold, adjusting the color gamut adjustment matrix of the display screen specifically includes:
adjusting a value of at least one of a2 and a3 based on a first adjustment width when a distance between an R vertex coordinate of a color coordinate system corresponding to the first color gamut and an R vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
adjusting a value of at least one of b1 and b3 based on a first adjustment magnitude when a distance between a G vertex coordinate of a color coordinate system corresponding to the first color gamut and a G vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut is greater than the first threshold value, the value of at least one of c1 and c2 is adjusted based on the first adjustment width.
Alternatively, the first adjustment amplitude may be 0.1. Each time the parameter is adjusted, it may be increased by 0.1 or decreased by 0.1.
As shown in fig. 2, assuming that the R vertex coordinate of the color coordinate system corresponding to the first color gamut is right below the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, the abscissa x needs to be decreased by a little, and the ordinate y needs to be increased by a little; in the RGB triangle, adding R, G, B a certain component will move the whole gamut diagram (triangle) from the center direction to the top angle direction of the added component, therefore, if the abscissa x needs to be decreased a little and the ordinate y needs to be increased a little, it can be realized by adding G component, according to the matrix multiplication, i.e. it needs to adjust the a2 parameter in the matrix to increase a little. a2 is initially 0, the first adjustment amplitude is 0.1, the first adjustment is to increase a2, the value of a2 is 0.1, the chromaticity is tested again to obtain a new color gamut, the color gamut adjustment is stopped if the condition is met, the color gamut adjustment is performed again if the condition is not met, the second adjustment is assumed to increase a2, the second adjustment is performed until a2 is 0.2, and the adjustment is circulated until the condition is met. And continuously adjusting the parameters of the color gamut adjusting matrix according to the horizontal and vertical coordinates to enable the test color gamut graph to be close to the standard color gamut graph. The adjustment process of other parameters of the color gamut adjustment matrix is similar to that described above, and will not be described herein again.
Optionally, when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is below the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a2 based on the first adjustment width; when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is above the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a3 based on the first adjustment width;
when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is on the left of the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of b1 based on the first adjustment amplitude; adjusting the value of b3 based on the first adjustment width when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is to the right of the G vertex coordinate of the color coordinate system corresponding to the standard color gamut;
when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is above the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of c1 based on the first adjustment width; when the B-vertex coordinates of the color coordinate system corresponding to the first gamut are below the B-vertex coordinates of the color coordinate system corresponding to the standard gamut, the value of c2 is adjusted based on the first adjustment width.
Optionally, the controller 20 adjusts the color gamut adjustment matrix of the display screen 30, which further includes any one or a combination of two of the following:
when the distance between the R vertex coordinate of the color coordinate system corresponding to the first color gamut and the R vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of a1 based on the first adjustment amplitude;
when the distance between the G vertex coordinate of the color coordinate system corresponding to the first color gamut and the G vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of b2 based on the first adjustment amplitude;
when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold, the value of c3 is adjusted based on the first adjustment width.
In the adjustment of a1, b2, and c3, at least one of a1, b2, and c3 needs to be kept at 1.
Optionally, adjusting the value of a1 includes: when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward of the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of a1 based on the first adjustment width; increasing the value of a1 based on the first adjustment width when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is to the left of the R vertex coordinate of the color coordinate system corresponding to the standard color gamut;
adjusting the value of b2, including: when the G vertex coordinates of the color coordinate system corresponding to the first color gamut are above the G vertex coordinates of the color coordinate system corresponding to the standard color gamut, decreasing the value of b2 based on the first adjustment width; increasing the value of b2 based on the first adjustment width when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is below the G vertex coordinate of the color coordinate system corresponding to the standard color gamut;
adjusting the value of c3, including: decreasing the value of c3 based on the first adjustment width when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is to the right of the B vertex coordinate of the color coordinate system corresponding to the standard color gamut; when the B-vertex coordinates of the color coordinate system corresponding to the first gamut are to the left of the B-vertex coordinates of the color coordinate system corresponding to the standard gamut, the value of c3 is increased based on the first adjustment width.
The color gamut adjusting matrix is automatically adjusted through feedback cooperation between the colorimeter and the controller, automatic color gamut debugging is achieved, and the efficiency of factory debugging of the display screen is improved.
The following points need to be explained:
the drawings of the embodiments of the present application relate only to the structures related to the embodiments of the present application, and other structures may refer to general designs.
Without conflict, features of embodiments of the present invention, that is, embodiments, may be combined with each other to arrive at new embodiments.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A method of adjusting a color gamut, comprising:
the testing steps are as follows: displaying a test image on a display screen to be tested, and testing the chromaticity of the display screen to obtain a first color gamut of the display screen;
a comparison step: comparing the first color gamut with the standard color gamut, and finishing the color gamut adjustment when the difference value between the first color gamut and the standard color gamut is less than or equal to a first threshold value; when the difference value between the first color gamut and the standard color gamut is larger than a first threshold value, adjusting a color gamut adjusting matrix of the display screen;
and repeating the testing step and the comparing step, and adjusting the first color gamut of the display screen by continuously adjusting the color gamut adjusting matrix of the display screen until the difference value between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to a first threshold value.
2. The method for adjusting color gamut according to claim 1, wherein the comparing step specifically comprises:
obtaining the vertex coordinates of RGB in the color coordinate system corresponding to the first color gamut;
and comparing the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut with the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut, when the difference value between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is less than or equal to a first threshold value, no color gamut adjustment is needed, and when the difference value between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is greater than the first threshold value, the color gamut adjustment matrix of the display screen is adjusted.
3. The method of claim 2, wherein the gamut adjustment matrix isWhen the difference between the RGB vertex coordinates in the color coordinate system corresponding to the first color gamut and the RGB vertex coordinates in the color coordinate system corresponding to the standard color gamut is greater than the first threshold, adjusting the color gamut adjustment matrix of the display screen specifically includes:
adjusting a value of at least one of a2 and a3 based on a first adjustment width when a distance between an R vertex coordinate of a color coordinate system corresponding to the first color gamut and an R vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
adjusting a value of at least one of b1 and b3 based on a first adjustment magnitude when a distance between a G vertex coordinate of a color coordinate system corresponding to the first color gamut and a G vertex coordinate of a color coordinate system corresponding to the standard color gamut is greater than a first threshold;
when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut is greater than the first threshold value, the value of at least one of c1 and c2 is adjusted based on the first adjustment width.
4. The method of claim 3, wherein the initial value of the gamut adjustment matrix is
The first adjustment amplitude is 0.1.
5. The color gamut adjustment method according to claim 3,
when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is below the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a2 based on the first adjustment width; when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is above the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of a3 based on the first adjustment width;
when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is on the left of the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of b1 based on the first adjustment amplitude; when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward from the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of b3 based on the first adjustment width;
when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is above the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of c1 based on the first adjustment width; and when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is below the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, adjusting the value of c2 based on the first adjustment width.
6. The method for adjusting color gamut according to claim 3, wherein the adjusting the color gamut adjusting matrix of the display screen further comprises any one or a combination of two of the following:
when the distance between the R vertex coordinate of the color coordinate system corresponding to the first color gamut and the R vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of a1 based on the first adjustment amplitude;
when the distance between the G vertex coordinate of the color coordinate system corresponding to the first color gamut and the G vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of b2 based on the first adjustment amplitude;
and when the distance between the B vertex coordinate of the color coordinate system corresponding to the first color gamut and the B vertex coordinate of the color coordinate system corresponding to the standard color gamut exceeds a preset difference threshold value, adjusting the value of c3 based on the first adjustment amplitude.
7. The color gamut adjustment method according to claim 6,
the adjusting the value of a1 includes: when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward from the R vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of a1 based on the first adjustment width; increasing the value of a1 based on the first adjustment width when the R vertex coordinate of the color coordinate system corresponding to the first color gamut is to the left of the R vertex coordinate of the color coordinate system corresponding to the standard color gamut;
the adjusting the value of b2 includes: when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is above the G vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of b2 based on the first adjustment width; increasing the value of b2 based on the first adjustment width when the G vertex coordinate of the color coordinate system corresponding to the first color gamut is below the G vertex coordinate of the color coordinate system corresponding to the standard color gamut;
the adjusting the value of c3 includes: when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is rightward from the B vertex coordinate of the color coordinate system corresponding to the standard color gamut, decreasing the value of c3 based on the first adjustment width; and increasing the value of c3 based on the first adjustment width when the B vertex coordinate of the color coordinate system corresponding to the first color gamut is to the left of the B vertex coordinate of the color coordinate system corresponding to the standard color gamut.
8. The method of claim 1, wherein the test image comprises at least three groups R/G/B, wherein the group R comprises a full 255 gray level red frame, the group G comprises a full 255 gray level green frame, and the group B comprises a full 255 gray level blue frame.
9. The method of claim 1, wherein the test image comprises at least three groups of R/G/B, wherein the group R comprises a plurality of red frames with predetermined gray scale values, the group G comprises a plurality of green frames with predetermined gray scale values, and the group B comprises a plurality of blue frames with predetermined gray scale values, wherein the predetermined gray scale values comprise a full 255 gray scale and further comprise one or more values between 0 and 254.
10. A color gamut adjustment system comprising a colorimeter and a controller, wherein:
a colorimeter for repeatedly performing a second testing step, the second testing step comprising: receiving a test notification of the controller, testing the chromaticity of the display screen to be tested to obtain a first color gamut of the display screen and outputting the first color gamut to the controller;
the controller is used for repeatedly executing the first testing step and the comparing step, and adjusting the first color gamut of the display screen by continuously adjusting the color gamut adjusting matrix of the display screen until the difference value between the adjusted first color gamut of the display screen and the standard color gamut is less than or equal to a first threshold value; the first testing step comprises: displaying a test image on a display screen to be tested, and sending a test notice to a colorimeter; the comparing step includes: receiving a first color gamut of a display screen output by a colorimeter, comparing the first color gamut with a standard color gamut, and finishing color gamut adjustment when the difference value between the first color gamut and the standard color gamut is less than or equal to a first threshold value; and when the difference value between the first color gamut and the standard color gamut is larger than a first threshold value, adjusting a color gamut adjusting matrix of the display screen.
11. The system according to claim 10, wherein the standard color gamut is an sRGB standard color gamut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932144.3A CN110662022B (en) | 2019-09-29 | 2019-09-29 | Color gamut adjusting system and color gamut adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932144.3A CN110662022B (en) | 2019-09-29 | 2019-09-29 | Color gamut adjusting system and color gamut adjusting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110662022A true CN110662022A (en) | 2020-01-07 |
| CN110662022B CN110662022B (en) | 2021-08-20 |
Family
ID=69039782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910932144.3A Active CN110662022B (en) | 2019-09-29 | 2019-09-29 | Color gamut adjusting system and color gamut adjusting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110662022B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679483A (en) * | 2020-06-02 | 2020-09-18 | Tcl华星光电技术有限公司 | Method for adjusting color gamut of liquid crystal display panel |
| CN112233605A (en) * | 2020-10-28 | 2021-01-15 | 合肥京东方光电科技有限公司 | Color gamut adjusting method and device, electronic equipment and storage medium |
| CN112286604A (en) * | 2020-09-28 | 2021-01-29 | 广州视源电子科技股份有限公司 | Display picture color adjusting method and device and computer equipment |
| CN112866665A (en) * | 2020-12-30 | 2021-05-28 | 海信视像科技股份有限公司 | Laser projection equipment and display method of projected image thereof |
| CN114550673A (en) * | 2020-11-25 | 2022-05-27 | 京东方科技集团股份有限公司 | Color gamut adjusting method and device, electronic equipment and storage medium |
| WO2022121314A1 (en) * | 2020-12-10 | 2022-06-16 | 深圳市洲明科技股份有限公司 | Method and apparatus for adjusting color gamut of display screen |
| WO2022134068A1 (en) * | 2020-12-25 | 2022-06-30 | 京东方科技集团股份有限公司 | Color temperature calibration method and color temperature self-calibration system |
| WO2023184176A1 (en) * | 2022-03-29 | 2023-10-05 | 京东方科技集团股份有限公司 | Image quality calibration method, system, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080079745A1 (en) * | 2006-09-29 | 2008-04-03 | Samsung Electronics Co., Ltd. | Display apparatus and image processing method thereof |
| CN106023942A (en) * | 2016-08-01 | 2016-10-12 | 京东方科技集团股份有限公司 | Gray scale and color difference adjusting method and device of display panel and display device |
| CN106531060A (en) * | 2016-11-16 | 2017-03-22 | 西安诺瓦电子科技有限公司 | Luminance correcting method and device for LED display device |
| CN107622744A (en) * | 2017-08-22 | 2018-01-23 | 四川长虹电器股份有限公司 | A kind of visual testing method of liquid crystal television screen colorimetric properties |
| CN109727573A (en) * | 2017-10-31 | 2019-05-07 | 上海和辉光电有限公司 | A kind of display methods and display device |
-
2019
- 2019-09-29 CN CN201910932144.3A patent/CN110662022B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080079745A1 (en) * | 2006-09-29 | 2008-04-03 | Samsung Electronics Co., Ltd. | Display apparatus and image processing method thereof |
| CN106023942A (en) * | 2016-08-01 | 2016-10-12 | 京东方科技集团股份有限公司 | Gray scale and color difference adjusting method and device of display panel and display device |
| CN106531060A (en) * | 2016-11-16 | 2017-03-22 | 西安诺瓦电子科技有限公司 | Luminance correcting method and device for LED display device |
| CN107622744A (en) * | 2017-08-22 | 2018-01-23 | 四川长虹电器股份有限公司 | A kind of visual testing method of liquid crystal television screen colorimetric properties |
| CN109727573A (en) * | 2017-10-31 | 2019-05-07 | 上海和辉光电有限公司 | A kind of display methods and display device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679483A (en) * | 2020-06-02 | 2020-09-18 | Tcl华星光电技术有限公司 | Method for adjusting color gamut of liquid crystal display panel |
| CN112286604A (en) * | 2020-09-28 | 2021-01-29 | 广州视源电子科技股份有限公司 | Display picture color adjusting method and device and computer equipment |
| CN112286604B (en) * | 2020-09-28 | 2024-04-16 | 广州视源电子科技股份有限公司 | Color adjustment method and device for display picture and computer equipment |
| CN112233605A (en) * | 2020-10-28 | 2021-01-15 | 合肥京东方光电科技有限公司 | Color gamut adjusting method and device, electronic equipment and storage medium |
| CN114550673A (en) * | 2020-11-25 | 2022-05-27 | 京东方科技集团股份有限公司 | Color gamut adjusting method and device, electronic equipment and storage medium |
| WO2022121314A1 (en) * | 2020-12-10 | 2022-06-16 | 深圳市洲明科技股份有限公司 | Method and apparatus for adjusting color gamut of display screen |
| WO2022134068A1 (en) * | 2020-12-25 | 2022-06-30 | 京东方科技集团股份有限公司 | Color temperature calibration method and color temperature self-calibration system |
| CN115176305A (en) * | 2020-12-25 | 2022-10-11 | 京东方科技集团股份有限公司 | Color temperature calibration method and color temperature self-calibration system |
| CN115176305B (en) * | 2020-12-25 | 2023-11-21 | 京东方科技集团股份有限公司 | Color temperature calibration method and color temperature self-calibration system |
| US11908379B2 (en) | 2020-12-25 | 2024-02-20 | Boe Technology Group Co., Ltd. | Color temperature self-calibration system and color temperature calibration method |
| CN112866665A (en) * | 2020-12-30 | 2021-05-28 | 海信视像科技股份有限公司 | Laser projection equipment and display method of projected image thereof |
| WO2023184176A1 (en) * | 2022-03-29 | 2023-10-05 | 京东方科技集团股份有限公司 | Image quality calibration method, system, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110662022B (en) | 2021-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110662022B (en) | Color gamut adjusting system and color gamut adjusting method | |
| CN110197642B (en) | Method for acquiring tricolor brightness correction relationship, correction method and correction device of display | |
| CN101416228B (en) | Method and apparatus for converting from source color space to RGBW target color space | |
| CN100587781C (en) | On-line brightness correcting and color gamut optimizing method for full-color LED display screen | |
| CN106128373B (en) | Image processing device with image compensation function and image processing method thereof | |
| US9236033B2 (en) | Color processing apparatus and color processing method | |
| US7742057B2 (en) | Method and device of obtaining a color temperature point | |
| US20060132867A1 (en) | Tone reproduction characteristics measuring device for color monitor | |
| US9030483B2 (en) | Image display device displaying multi-primary color and method of driving the same | |
| CN107221272B (en) | Display screen parameter setting method | |
| JP6222939B2 (en) | Unevenness correction apparatus and control method thereof | |
| US20110148902A1 (en) | Evaluation method of display device | |
| CN111091789B (en) | Display device and color correction method thereof | |
| CN105282531A (en) | Low grayscale white balance control method and device | |
| CN106328089A (en) | Pixel driving method | |
| CN103366711B (en) | The method of the precision of four look white balance adjustment is improved with three primary colors luminance parameter | |
| US20140314317A1 (en) | Method and apparatus for converting gray level of color image | |
| CN104144332A (en) | Image color adjusting method and electronic device using the same | |
| CN109119046B (en) | Adjusting system and adjusting method for gray scale brightness and memory | |
| US20060227148A1 (en) | Visual determination of gamma for softcopy display | |
| CN113920927B (en) | Display method, display panel and electronic equipment | |
| CN115762380A (en) | Display method and display device | |
| CN112637579A (en) | Method and system for correcting Micro LED depth color | |
| CN111739480A (en) | Panel uniformity correction method | |
| EP3493195A1 (en) | Method and computer program for evaluating the colour output of a display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |