WO2022048423A1 - 显示补偿信息的获取方法、显示补偿方法及装置 - Google Patents

显示补偿信息的获取方法、显示补偿方法及装置 Download PDF

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Publication number
WO2022048423A1
WO2022048423A1 PCT/CN2021/112275 CN2021112275W WO2022048423A1 WO 2022048423 A1 WO2022048423 A1 WO 2022048423A1 CN 2021112275 W CN2021112275 W CN 2021112275W WO 2022048423 A1 WO2022048423 A1 WO 2022048423A1
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Prior art keywords
color
emitting device
light
target
display panel
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PCT/CN2021/112275
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English (en)
French (fr)
Inventor
彭项君
史天阔
赵晨曦
侯一凡
张小牤
孙伟
张硕
孙炎
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to US17/785,644 priority Critical patent/US11900852B2/en
Publication of WO2022048423A1 publication Critical patent/WO2022048423A1/zh

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    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2044—Display of intermediate tones using dithering
    • 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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2044—Display of intermediate tones using dithering
    • G09G3/2051—Display of intermediate tones using dithering with use of a spatial dither pattern
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    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
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    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
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    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/06—Use of more than one graphics processor to process data before displaying to one or more screens
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present invention relates to the technical field, and in particular to a method for obtaining display compensation information, a display compensation method and a device.
  • the LEDs required for a large-area LED display panel belong to the same batch, which greatly increases the cost.
  • the drift speed of the wavelength center and the brightness decay speed are not the same, which exacerbates the full-color LED display.
  • the chromaticity and luminance non-uniformity of the panel also brings more difficulties to the chromaticity and luminance uniformity correction.
  • the present invention provides a method for obtaining display compensation information, a display compensation method and a device, which are used to solve the problem of poor uniformity of luminance and chromaticity of the existing display panel.
  • the present invention adopts the following technical solutions:
  • the present invention provides a method for obtaining display compensation information, including:
  • the display panel includes a plurality of pixels, each of the pixels includes a single-color light-emitting device of multiple colors, and when the display panel displays the solid-color image, the corresponding color Monochromatic light-emitting devices display the highest gray scale;
  • the target data determine the conversion matrix of the target color gamut of the display panel and the pixel conversion matrix of each of the pixels;
  • a uniformity conversion matrix for performing luminance and chrominance uniformity compensation on each of the pixels is determined.
  • the target data includes: color coordinates and brightness of the monochromatic light-emitting device; according to the target data, determining the conversion matrix of the target color gamut of the display panel includes:
  • a conversion matrix of the target color gamut of the display panel is determined according to the target luminance and target color coordinates of the monochromatic light-emitting device of each color.
  • the method before determining the conversion matrix of the target color gamut of the display panel according to the target brightness and target color coordinates of the monochromatic light-emitting device of each color, the method further includes:
  • each of the pixels includes monochromatic light-emitting devices of three colors; the conversion matrix of the target color gamut is:
  • (x t_r , y t_r ) is the target color coordinate of the light-emitting device of the first color
  • Y t_r is the target brightness of the light-emitting device of the first color
  • (x t_g , y t_g ) is the target of the light-emitting device of the second color
  • the color coordinates Y t_g is the target brightness of the light emitting device of the second color
  • (x t_b , y t_b ) is the target color coordinate of the light emitting device of the third color
  • Y t_b is the target brightness of the light emitting device of the third color.
  • each of the pixels includes three-color monochromatic light-emitting devices;
  • the target data includes: color coordinates and brightness of the monochromatic light-emitting devices;
  • the pixel conversion matrix is:
  • (x r , y r ) is the color coordinate of the light-emitting device of the first color at the highest gray level
  • Y r is the brightness of the light-emitting device of the first color at the highest gray level
  • (x g , y g ) is The color coordinate of the light-emitting device of the second color at the highest gray level
  • Y g is the brightness of the light-emitting device of the second color at the highest gray level
  • (x b , y b ) is the light-emitting device of the third color at the highest gray level
  • Y b is the brightness of the light-emitting device of the third color at the highest gray scale.
  • the target data includes: color coordinates and brightness of the monochromatic light-emitting device; and determining a pixel conversion matrix for each of the pixels includes:
  • grayscales that can be displayed are divided into N grayscale segments, where N is a positive integer greater than or equal to 2;
  • the pixel transformation matrix of each of the pixels is determined according to the color coordinate fluctuation coefficient.
  • the N is 2.
  • each of the pixels includes monochromatic light-emitting devices of three colors; the pixel conversion matrix is:
  • (x r , y r ) is the color coordinate of the light-emitting device of the first color at the highest gray scale
  • Y r is the brightness of the light-emitting device of the first color at the highest gray scale
  • ⁇ f r1 , f r2 ⁇ is The color coordinate fluctuation coefficient of the light-emitting device of the first color
  • (x g , y g ) is the color coordinate of the light-emitting device of the second color at the highest gray scale
  • Y g is the brightness of the light-emitting device of the second color at the highest gray scale
  • ⁇ f g1 , f g2 ⁇ is the color coordinate fluctuation coefficient of the light-emitting device of the second color
  • (x b , y b ) is the color coordinate of the light-emitting device of the third color at the highest gray scale
  • Y b is the third color
  • the display panel is formed by splicing a plurality of display sub-panels;
  • the target data further includes: the coordinate position of each of the single-color light-emitting devices;
  • the method further includes:
  • the distance between the adjacent monochromatic light-emitting devices determine whether there is a seam on the display panel and the brightness of the seam
  • the present invention also provides a display compensation method, comprising:
  • the uniformity conversion matrix of the display panel luminance and chromaticity uniformity compensation is performed on the image to be displayed pixel by pixel, and the uniformity conversion matrix is obtained according to the method for obtaining display compensation information in the first aspect.
  • performing pixel-by-pixel luminance and chromaticity uniformity compensation on the to-be-displayed image includes:
  • luminance and chrominance uniformity compensation is performed on the original image data of each pixel.
  • the display panel is formed by splicing multiple display sub-panels; the method further includes:
  • Inter-screen seam compensation is performed on the image data after the luminance and chrominance uniformity compensation according to the actual compensation coefficient.
  • the present invention also provides a device for obtaining compensation information, comprising:
  • an acquisition module configured to acquire target data in a solid-color image displayed by a display panel
  • the display panel includes a plurality of pixels, each of the pixels includes a single-color light-emitting device of a plurality of colors, and the display panel displays the solid-color image
  • the monochromatic light-emitting device of the corresponding color displays the highest gray scale
  • a first determining module configured to determine, according to the target data, a conversion matrix of a target color gamut of the display panel and a pixel conversion matrix of each of the pixels;
  • the second determination module is configured to determine, according to the pixel conversion matrix and the conversion matrix of the target color gamut, a uniformity conversion matrix for performing luminance and chrominance uniformity compensation on each of the pixels.
  • the present invention also provides a display compensation device, comprising:
  • an acquisition module for acquiring the to-be-displayed image of the display panel
  • a uniformity compensation module configured to perform luminance and chromaticity uniformity compensation on the to-be-displayed image pixel by pixel according to the stored uniformity conversion matrix of the display panel, the uniformity conversion matrix being displayed according to the above-mentioned first aspect
  • the acquisition method of compensation information is obtained.
  • the present invention further provides a readable storage medium, on which a program or an instruction is stored, and when the program or instruction is executed by a processor, the method for obtaining the display compensation information of the above-mentioned first aspect is realized. or, when the program or instruction is executed by the processor, the steps of the display compensation method of the second aspect above are implemented.
  • the image quality of the display panel can be better improved.
  • FIG. 1 is a schematic flowchart of a display compensation method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an overall structure of a display compensation method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a fitting curve of the change of the color coordinate x of the blue LED with the current (gray scale) y according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of 8 kinds of uniform compensation matrices corresponding to one pixel according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a display compensation method according to another embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a display compensation method according to another embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a display compensation method according to another embodiment of the present invention.
  • Fig. 8 is the schematic diagram of the dither template of the embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a dither method according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a display compensation device according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a display compensation device according to another embodiment of the present invention.
  • an embodiment of the present invention provides a method for obtaining display compensation information, which is applied to an electronic device.
  • the electronic device may be a computing and processing device such as a personal computer (PC).
  • the method for obtaining display compensation information includes: :
  • Step 11 Acquire target data in a solid-color image displayed by a display panel.
  • the display panel includes a plurality of pixels, and each pixel includes a single-color light-emitting device of multiple colors.
  • the monochromatic light-emitting device of the corresponding color displays the highest gray scale;
  • the display panel may be an LED display panel, or other types of display panels.
  • the LED display panel can be, for example, a Mini LED display panel, a Micro LED display panel, and the like.
  • the pixels of the display panel may include monochromatic light emitting devices of multiple colors, eg, including red light emitting devices, green light emitting devices, and blue light emitting devices.
  • the target data includes: characteristic information data of the monochromatic light-emitting device, such as color coordinates and luminance.
  • the display panel firstly, it is necessary to control the display panel to display solid-color images corresponding to the monochromatic light-emitting devices of multiple colors, and perform image collection.
  • the pixels of the display panel include three-color monochromatic light-emitting devices
  • the first-color light-emitting device in each pixel is turned on and displays the highest gray level (eg, 255 ), the light-emitting devices of the second color and the third color are turned off;
  • the second color image is displayed, the light-emitting devices of the second color in each pixel are turned on, and the highest gray level (for example, 255) is displayed, and the first color and the third color are turned on.
  • the light-emitting devices of the three colors are turned off; when the image of the third color is displayed, the light-emitting devices of the third color in each pixel are turned on and display the highest gray level (for example, 255), and the light-emitting devices of the first color and the second color are turned off .
  • a camera such as an industrial camera
  • the target data is extracted from the solid color image of each color, and input to the above-mentioned electronic device (eg PC).
  • the solid-color image captured by the camera may also be input into the above-mentioned electronic device, and the electronic device extracts target data from the solid-color image.
  • Step 12 According to the target data, determine the conversion matrix of the target color gamut of the display panel and the pixel conversion matrix of each of the pixels;
  • the pixel transformation matrix of each pixel may be determined separately, or a pixel set may be formed for pixels of the same bin, and the pixel transformation matrix of the pixel set may be determined.
  • Step 13 Determine, according to the pixel conversion matrix and the conversion matrix of the target color gamut, a uniformity conversion matrix for performing luminance and chrominance uniformity compensation on each of the pixels.
  • the target color gamut of the display panel is the area enclosed by the target color coordinates that the monochromatic light-emitting device of each color needs to achieve.
  • the display panel includes red, green, and blue light-emitting devices.
  • the color coordinates are (x r , y r ), the target color coordinates that the green light-emitting device needs to achieve is (x g , y g ), and the target color coordinates that the blue light-emitting device needs to achieve are (x b , y b ), three
  • the triangular area enclosed by the color coordinate lines becomes the target color gamut of the display panel.
  • performing the normalization process on the image to be displayed includes luminance uniformity and chrominance uniformity.
  • the minimum brightness among the brightnesses of all the single-color light-emitting devices of the same color can be obtained as the target brightness, and the brightness of all the single-color light-emitting devices can be corrected to the corresponding brightness during brightness uniformity processing target brightness.
  • the display panel includes light-emitting devices of three colors, red, green, and blue
  • the above-mentioned pure-color image includes: a red image, a green image, and a blue image
  • the electronic device counts the brightness of each red light-emitting device in the red image.
  • chromaticity compensation may be performed pixel by pixel, and the monochromatic light-emitting devices of multiple colors of one pixel are respectively corrected to corresponding color coordinates.
  • the chromaticity theoretical formula used in the chromaticity normalization process is as follows (assuming that the input original image data of the image to be displayed is an RGB value):
  • RGB value of XYZ under the target color gamut at each pixel color gamut is the inverse matrix of the pixel conversion matrix C pixel of each pixel, ⁇ R out ; G out ; B out ⁇ is the linear RGB value of the image to be displayed after chromaticity normalization, that is, after inputting this value to the display panel, the display panel can Displays images with better uniformity.
  • gamma is the gamma value of the display panel, for example, it can be 2.2.
  • C pixel of a pixel may be a 3 ⁇ 3 matrix.
  • a 3x3 matrix The calculation of the C pixel of a pixel is related to the color coordinates of the monochromatic light-emitting device of the pixel. It is assumed that a certain pixel includes a light-emitting device of a first color, a light-emitting device of a second color, and a light-emitting device of a third color.
  • the light-emitting device of the first color The color coordinate of the device is (x r , y r ), the luminance is Y r , the color coordinate of the light-emitting device of the second color is (x g , y g ), the luminance is Y g , the color coordinate of the light-emitting device of the third color is is (x b , y b ) and the brightness is Y b , then the C pixel of the pixel can be:
  • the target data includes: color coordinates and luminance of the monochromatic light-emitting device; according to the target data, determining the conversion matrix of the target color gamut of the display panel includes:
  • a conversion matrix of the target color gamut of the display panel is determined according to the target luminance and target color coordinates of the monochromatic light-emitting device of each color.
  • the conversion matrix C target of the target color gamut may also be a 3 ⁇ 3 matrix. It is assumed that each of the pixels includes three-color monochromatic light-emitting devices; the conversion matrix of the target color gamut is:
  • (x t_r , y t_r ) is the target color coordinate of the light-emitting device of the first color
  • Y t_r is the target brightness of the light-emitting device of the first color
  • (x t_g , y t_g ) is the target of the light-emitting device of the second color
  • the color coordinates Y t_g is the target brightness of the light emitting device of the second color
  • (x t_b , y t_b ) is the target color coordinate of the light emitting device of the third color
  • Y t_b is the target brightness of the light emitting device of the third color.
  • the result is a 3x3 coefficient matrix.
  • the color coordinates of a single-color light-emitting device are not static, and will change with the current (ie, gray scale) flowing through it.
  • FIG. 3 shows the color of a blue light-emitting device of a display panel. Fitted curve of coordinate x as a function of current (gray scale) y.
  • the color coordinates of the highest grayscale such as 255 of the monochromatic light-emitting device are considered. If the color coordinates of all grayscales are expressed by the color coordinates of the highest grayscale, it will affect the final compensation result.
  • the color coordinate fluctuation coefficient of the color coordinate of the monochromatic light-emitting device as a function of current can be added to the calculation of the C pixel of the above-mentioned pixel to obtain a more accurate C pixel .
  • the actual current usage interval of the blue light-emitting device is [0, 0.56].
  • each of the pixels includes three-color monochromatic light-emitting devices; the pixel conversion matrix is:
  • (x r , y r ) is the color coordinate of the light-emitting device of the first color at the highest gray scale
  • Y r is the brightness of the light-emitting device of the first color at the highest gray scale
  • ⁇ f r1 , f r2 ⁇ is The color coordinate fluctuation coefficient of the light-emitting device of the first color
  • (x g , y g ) is the color coordinate of the light-emitting device of the second color at the highest gray scale
  • Y g is the brightness of the light-emitting device of the second color at the highest gray scale
  • ⁇ f g1 , f g2 ⁇ is the color coordinate fluctuation coefficient of the light-emitting device of the second color
  • (x b , y b ) is the color coordinate of the light-emitting device of the third color at the highest gray scale
  • Y b is the third color
  • all the grayscales that can be displayed (for example, 0 to 255) can be segmented, and for each color of a single-color light-emitting device, all the grayscales that can be displayed can be divided into N gray-scale segments, where N is a positive integer greater than or equal to 2; then, according to the fitting curve of the color coordinates of the monochromatic light-emitting device changing with current and the extracted monochromatic light-emitting device at the highest grayscale determine the color coordinate fluctuation coefficient of each of the N gray-scale segments; determine the pixel transformation matrix of each pixel set according to the color coordinate fluctuation coefficient.
  • the simplest is to divide all the grayscales that can be displayed by the monochromatic light-emitting device of each color into two sections (high grayscale and low grayscale).
  • the original image of the image to be displayed can be divided pixel by pixel
  • the data is segmented according to the threshold (rth/gth/bth), and the value greater than the threshold is high grayscale, the corresponding color coordinate is the color coordinate under high grayscale, and the flag bit can be set to 1, otherwise, the corresponding color coordinate is low gray
  • the flag bit can be set to 0.
  • the method for determining the above threshold value may be as follows: firstly estimate the gray level after the maximum gray level uniformity compensation, then calculate the current segment corresponding to the compensated gray level, and take the input gray level corresponding to 1/2 of the current segment as: Threshold gray level, for example, the current corresponding to the gray level after 255 gray level compensation is segmented into the 44th segment, by calculating the gray level after 200 gray level compensation corresponds to the 22nd segment current, then the threshold value is set to 200 gray level, less than 200
  • the color coordinates corresponding to the input gray level of the gray scale are the color coordinates corresponding to the 22nd stage current, and the color coordinates corresponding to the input gray level greater than or equal to 200 are the color coordinates corresponding to the 44th stage current.
  • the input grayscale corresponding to 1/2 of the current segment may not be taken as the threshold grayscale, and the embodiment of the present invention takes 1/2 as an example for description.
  • the thresholds corresponding to the monochromatic light-emitting devices of different colors may be the same or different.
  • each pixel set corresponds to 8 of the pixel conversion matrices.
  • RGB is a grayscale
  • the value greater than the threshold is a high grayscale.
  • the coordinates are the color coordinates in high grayscale, and the flag bit can be set to 1.
  • the corresponding color coordinates are the color coordinates in low grayscale, and the flag bit can be set to 0.
  • the last column is the number of the normalized supplementary matrix.
  • the selection principle of the target color gamut is to be surrounded by the color gamut of all pixels, that is, the target color gamut surrounded by the target color coordinates of the monochromatic light-emitting device of each color can be surrounded by the color gamut of each pixel. It is surrounded by a color gamut formed by the color coordinates of the monochromatic light-emitting devices of multiple colors.
  • a smaller color gamut triangle intersected by them is selected as the target color gamut triangle.
  • the display panel in the embodiment of the present invention may be formed by splicing a plurality of display sub-panels; when a plurality of small display sub-panels are spliced into a large display panel, there may be seams between the display sub-panels due to various factors. affect visual effects.
  • the target data obtained from the solid-color image may further include: each single-color light-emitting device (also referred to as a lamp point); the method also includes:
  • Step 14 according to the coordinate position of each single-color light-emitting device, determine the distance between adjacent single-color light-emitting devices;
  • Step 15 According to the distance between adjacent monochromatic light-emitting devices, determine whether there is a seam on the display panel and whether the seam is bright or dark;
  • the distance between the light emitting devices on both sides of the seam may be larger or smaller than the distance between adjacent monochromatic light emitting devices in the display sub-panel.
  • the seam may be a dark seam.
  • the seam may be a bright seam.
  • Step 16 According to the judgment result, generate a rough seam compensation coefficient of the display panel.
  • the basic principle of chromaticity theory is used to obtain a method for measuring brightness and chromaticity of display panels.
  • the homogeneity transformation matrix of the homogeneity compensation is used to verify the above homogeneity transformation matrix with the test image on the screen.
  • the color coordinate and brightness uniformity after compensation meet the requirements of the index, the difference between the color coordinates x and y is controlled within 0.003, and the brightness uniformity is greater than 0.003. 98%, verifying the correctness and practicability of the method.
  • an embodiment of the present invention further provides a display compensation method, which is applied to a display device, where the display device includes a display panel, and the display compensation method includes:
  • Step 61 acquiring the image to be displayed on the display panel
  • Step 62 Perform luminance and chromaticity uniformity compensation on the image to be displayed pixel by pixel according to the stored uniformity conversion matrix of the display panel, the uniformity conversion matrix is based on the display compensation method in any of the above embodiments get.
  • the RGB data ⁇ R out ; G out ; B out ⁇ after the homogeneity compensation can be calculated by the following formula:
  • C i is the normalization compensation matrix
  • RGB is the data before luminance and chrominance normalization compensation.
  • the image quality of the display panel can be better improved by theoretically mapping the luminance and chromaticity of the monochromatic light-emitting device.
  • the above-mentioned display compensation method may be performed by a driving IC (driving integrated circuit, also referred to as an IC terminal in this embodiment of the present invention) in the display device.
  • a driving IC driving integrated circuit
  • FIG. 2 The receiving card in FIG. 2 is used for receiving
  • the image to be displayed is transmitted to the IC (Mini TX IC), and the IC performs pixel-by-pixel luminance and chromaticity homogeneity compensation on the image to be displayed according to the homogenization conversion calculated by the PC (ie, the homogeneity calculation in Figure 2) , RX in Figure 2 is the LED display panel.
  • the color coordinates of the monochromatic light-emitting device will vary with the current (gray scale). Therefore, in the embodiment of the present invention, the PC side will be able to All displayed grayscales are divided into N grayscale segments, and the corresponding homogeneity transformation matrix is calculated when each color of the monochromatic light-emitting device of the pixel is in different grayscale segments. In this case, please refer to Figure 7.
  • performing pixel-by-pixel brightness and chromaticity uniformity compensation on the to-be-displayed image includes:
  • Step 621 Acquire the grayscale segment to which the original image data of each pixel in the image to be displayed belongs, wherein, for each color of the monochromatic light-emitting device, all the grayscales that can be displayed are divided into N grayscales Segment, N is a positive integer greater than or equal to 2;
  • Step 622 Determine the homogeneity transformation matrix corresponding to the pixel according to the gray-scale segment to which the original image data of each pixel belongs;
  • Step 623 Perform luminance and chrominance homogeneity compensation on the original image data of each pixel according to the determined homogeneity transformation matrix.
  • each pixel corresponds to 8 pixel conversion matrices
  • the RGB data is greater than the corresponding threshold value is a high gray scale
  • the corresponding color coordinate is the color in the high gray scale Coordinates
  • the flag bit can be set to 1, otherwise, the corresponding color coordinate is the color coordinate under low gray scale, the flag bit can be set to 0, and the corresponding uniform compensation matrix is obtained according to the corresponding flag bit of the RGB data.
  • the fluctuation coefficient of the color gamut of the monochromatic light-emitting device changing with the gray scale is added to the algorithm, so that the compensation is more accurate.
  • the method before performing pixel-by-pixel luminance and chromaticity uniformity compensation on the to-be-displayed image, the method further includes: mapping the original image data of the to-be-displayed image to a target gamma
  • the linear data of the curve (that is, the input mapping LUT in Figure 2); when mapping, it needs to meet the various input modes of the receiving card (16bit, 10bit or 8bit, etc.), for example, if the input of the receiving card is 16bit (or 10bit or 8bit) linear data, convert 16bit (or 10bit or 8bit) linear data to 29bit linear data.
  • the uniformity matrix calculation will generate decimals, in the embodiment of the present invention, 2 bits can be reserved to accurately realize the target conversion gray scale, and the corresponding dither (dither) mode is selected according to the characteristics of the resolution of the display panel, so that the gray scale transition is smoother .
  • the display panel is divided into M*M areas.
  • the display panel is divided into 4*4 areas.
  • S frames are cycled once, for example, in the embodiment shown in FIG. 8 , 8 frames (F0-F7) are cycled in the time domain.
  • two dither modes can be designed according to whether the resolution of the LED display panel is divisible by 4. For the resolution that cannot be divisible by 4, dither cannot solve the problem of smooth transition of edge pixels. Same dither processing as 4*4 templates, the remaining column/row templates are 3*4 or 2*4 or 1*4.
  • the input is 10'b1111111010_11, and the remainder is 11, so it corresponds to the F1-11 template. Since it is the first pixel, the area of the template to which it belongs is the first one on the upper left, that is, w is 1 at this time, so the output is 1018+1; if The vertical resolution is divided by 4 and the remainder is 2, and the remaining 2 columns and the left 2 columns of the template can be judged and processed.
  • the PC terminal According to the distance between the monochromatic light-emitting devices, determine the position of the seam and whether the seam is a bright seam or a dark seam, so as to generate a seam rough compensation coefficient, and the IC terminal stores the seam rough compensation coefficient, and according to the to-be-to-be The actual compensation coefficient is calculated by displaying the image and the rough compensation coefficient of the seam, and the edge pixels of each small display sub-panel are compensated to reduce the influence of the seam on the visual effect.
  • the method further includes: calculating an actual compensation coefficient according to the image data after luminance and chromaticity uniformity compensation and the stored rough seam compensation coefficient of the display panel;
  • the image data after chromaticity uniformity compensation is subjected to inter-screen seam compensation.
  • the RGB data ⁇ R out_1 ; G out_1 ; B out_1 ⁇ after the seam compensation between the screens can be calculated by the following formula:
  • ⁇ R out ; G out ; B out ⁇ is the RGB data after homogeneity compensation
  • k is the actual compensation coefficient
  • ⁇ br ; b g ; b b ⁇ is the compensation gray scale.
  • the step of compensating for seam between screens is located after the uniformity compensation.
  • the image to be displayed further includes: converting the image data after luminance and chromaticity uniformity compensation or after inter-screen seam compensation into bits that conform to the target value (for example, 16bit) linear grayscale image data.
  • the display compensation method further includes: mapping the image data conforming to the target value bit to the target current and the PWM (pulse width modulation) value (from FIG. 2 .
  • PWM pulse width modulation
  • the low grayscale is accurately expressed by current and PWM, which can enhance the discrimination of low grayscale and avoid loss of details.
  • the specific mapping method is implemented by a look-up table, and the look-up table can be as follows:
  • IPWM is the average current corresponding to one gray scale.
  • the depth of the lookup table is 64, which are 1024*[0:63] respectively, corresponding to the current [I0:I63] and PWM 0 respectively.
  • the linear gray scale is a non-integer multiple of 1024, such as 1025 , then look up the table and know that the corresponding current is I1, and the PWM value is (1025-1024)*IPWM. After look-up table mapping, all linear grayscales can be accurately represented by current and PWM.
  • the homogenization compensation and the inter-screen seam compensation are not required, please refer to FIG. 2 , and the original image data received by the receiving card can also be directly Bypassed to the display panel.
  • an embodiment of the present invention further provides a device for acquiring compensation information, including:
  • an acquisition module configured to acquire target data in a solid-color image displayed by a display panel
  • the display panel includes a plurality of pixels, each of the pixels includes a single-color light-emitting device of a plurality of colors, and the display panel displays the solid-color image
  • the monochromatic light-emitting device of the corresponding color displays the highest gray scale
  • a first determining module configured to determine, according to the target data, a conversion matrix of a target color gamut of the display panel and a pixel conversion matrix of each of the pixels;
  • the second determination module is configured to determine, according to the pixel conversion matrix and the conversion matrix of the target color gamut, a uniformity conversion matrix for performing luminance and chrominance uniformity compensation on each of the pixels.
  • the target data includes: color coordinates and brightness of the monochromatic light-emitting device
  • the first determination module is used to obtain the minimum brightness among the brightnesses of all the monochromatic light-emitting devices of the same color as the target brightness; according to the target brightness and target color coordinates of the monochromatic light-emitting devices of each color, determine The conversion matrix of the target color gamut of the display panel.
  • the obtaining device for displaying compensation information further includes:
  • the third determining module is configured to determine the target color coordinates of the monochromatic light-emitting devices of each color, wherein the target color gamut enclosed by the target color coordinates of the monochromatic light-emitting devices of each color can be It is surrounded by a color gamut formed by the color coordinates of the monochromatic light-emitting devices of multiple colors.
  • each of the pixels includes monochromatic light-emitting devices of three colors; the conversion matrix of the target color gamut is:
  • (x t_r , y t_r ) is the target color coordinate of the light-emitting device of the first color
  • Y t_r is the target brightness of the light-emitting device of the first color
  • (x t_g , y t_g ) is the target of the light-emitting device of the second color
  • the color coordinates Y t_g is the target brightness of the light emitting device of the second color
  • (x t_b , y t_b ) is the target color coordinate of the light emitting device of the third color
  • Y t_b is the target brightness of the light emitting device of the third color.
  • each of the pixels includes three-color monochromatic light-emitting devices;
  • the target data includes: color coordinates and brightness of the monochromatic light-emitting devices;
  • the pixel conversion matrix is:
  • (x r , y r ) is the color coordinate of the light-emitting device of the first color at the highest gray level
  • Y r is the brightness of the light-emitting device of the first color at the highest gray level
  • (x g , y g ) is The color coordinate of the light-emitting device of the second color at the highest gray level
  • Y g is the brightness of the light-emitting device of the second color at the highest gray level
  • (x b , y b ) is the light-emitting device of the third color at the highest gray level
  • Y b is the brightness of the light-emitting device of the third color at the highest gray scale.
  • the target data includes: color coordinates and brightness of the monochromatic light-emitting device
  • the first determination module is configured to divide all grayscales that can be displayed into N grayscale segments for each color of the single-color light-emitting device, where N is a positive integer greater than or equal to 2;
  • the pixel transformation matrix of each of the pixels is determined according to the color coordinate fluctuation coefficient.
  • the N is 2.
  • each of the pixels includes monochromatic light-emitting devices of three colors; the pixel conversion matrix is:
  • (x r , y r ) is the color coordinate of the light-emitting device of the first color at the highest gray scale
  • Y r is the brightness of the light-emitting device of the first color at the highest gray scale
  • ⁇ f r1 , f r2 ⁇ is The color coordinate fluctuation coefficient of the light-emitting device of the first color
  • (x g , y g ) is the color coordinate of the light-emitting device of the second color at the highest gray scale
  • Y g is the brightness of the light-emitting device of the second color at the highest gray scale
  • ⁇ f g1 , f g2 ⁇ is the color coordinate fluctuation coefficient of the light-emitting device of the second color
  • (x b , y b ) is the color coordinate of the light-emitting device of the third color at the highest gray scale
  • Y b is the third color
  • the display panel is formed by splicing multiple display sub-panels;
  • the target data further includes: the coordinate position of each of the monochromatic light-emitting devices;
  • the display compensation information acquisition device further includes:
  • a fourth determining module configured to determine the distance between the adjacent monochromatic light emitting devices according to the coordinate position of each of the monochromatic light emitting devices
  • a judging module for judging whether there is a seam on the display panel and the brightness of the seam according to the distance between the adjacent monochromatic light-emitting devices
  • the generating module is used for generating the rough seam compensation coefficient of the display panel according to the judgment result.
  • an embodiment of the present invention further provides a display compensation device, including:
  • an acquisition module for acquiring the to-be-displayed image of the display panel
  • the uniformity compensation module is configured to perform luminance and chromaticity uniformity compensation on the to-be-displayed image pixel by pixel according to the stored uniformity conversion matrix of the display panel, and the uniformity conversion matrix is based on the above-mentioned uniformity conversion matrix applied to electronic equipment.
  • the compensation method is displayed.
  • the normalization compensation module is configured to obtain the gray-scale segment to which the original image data of each pixel in the to-be-displayed image belongs. All grayscales are divided into N grayscale segments, where N is a positive integer greater than or equal to 2; according to the grayscale segment to which the original image data of each pixel belongs, determine the uniformity transformation matrix corresponding to the pixel; according to The determined uniformity transformation matrix performs luminance and chrominance uniformity compensation on the raw image data of each pixel.
  • the display compensation device further includes:
  • the first mapping module is used to map the original image data of the image to be displayed into linear data conforming to the target gamma curve
  • the conversion module is used for converting the image data after luminance and chrominance uniformity compensation into image data conforming to the target numerical bit linear gray scale.
  • the display panel is formed by splicing multiple display sub-panels; the display compensation device further includes:
  • a calculation module configured to calculate the actual compensation coefficient according to the image data after luminance and chromaticity uniformity compensation and the stored rough seam compensation coefficient of the display panel;
  • An inter-screen seam compensation module configured to perform inter-screen seam compensation on the image data after luminance and chromaticity uniformity compensation according to the actual compensation coefficient.
  • the display compensation device further includes:
  • the second mapping module is used for mapping the image data after luminance and chrominance uniformity compensation to the target current and the PWM value.
  • An embodiment of the present application further provides an electronic device, including a processor, a memory, a program or an instruction stored in the memory and executable on the processor, and when the program or instruction is executed by the processor, the above-mentioned application to the electronic device is realized.
  • an electronic device including a processor, a memory, a program or an instruction stored in the memory and executable on the processor, and when the program or instruction is executed by the processor, the above-mentioned application to the electronic device is realized.
  • An embodiment of the present application further provides a display device, including a processor, a memory, a program or an instruction stored in the memory and executable on the processor, and when the program or instruction is executed by the processor, the above-mentioned application to the display device is realized.
  • the various processes of the embodiment of the display compensation method can achieve the same technical effect.
  • An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the above-mentioned embodiment of the method for obtaining display compensation information applied to an electronic device is implemented and can achieve the same technical effect, in order to avoid repetition, it will not be repeated here.
  • An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, each process of the above-mentioned embodiment of the display compensation method applied to a display device is implemented , and can achieve the same technical effect, in order to avoid repetition, it is not repeated here.
  • the processor is the processor in the terminal described in the foregoing embodiment.
  • the readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

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Abstract

本发明提供一种显示补偿信息的获取方法、显示补偿方法及装置，该显示补偿信息的获取方法包括：获取显示面板显示的纯色图像中的目标数据，所述显示面板包括多个像素，每个所述像素包括多种颜色的单色发光器件，所述显示面板显示所述纯色图像时，对应颜色的单色发光器件显示最高灰阶；根据所述目标数据，确定所述显示面板的目标色域的转换矩阵和每个所述像素的像素转换矩阵；根据所述像素转换矩阵和所述目标色域的转换矩阵，确定用于对每个所述像素进行亮度和色度均一性补偿的均一性转换矩阵。本发明能够提高显示面板的亮度和色度均一性。

Description

显示补偿信息的获取方法、显示补偿方法及装置
相关申请的交叉引用
本申请主张在2020年09月04日在中国提交的中国专利申请号No.202010921646.9的优先权，其全部内容通过引用包含于此。
技术领域
本发明涉及技术领域，具体涉及一种显示补偿信息的获取方法、显示补偿方法及装置。
背景技术
由于数量众多的发光二极管(LED)在光电参数上存在差异，当被组装成一整块显示面板播放画面时，常常出现斑驳、马赛克、花屏等不均一现象，因此色度和亮度均匀一致性问题是影响观看效果的重要因素，同时也是最难控制的因素，严重阻碍了LED显示行业的发展。对于色度的调节，目前通常用分Bin筛选法来缩小各像素色度的差别，但是由于不同厂家或同一厂家不同时期生产的LED的亮度、色度会有很大差别，同时又必须保证组装一块LED大面积显示面板所需LED属于同一批次，这使得成本大大提高，此外，即使对于同一批次的LED，波长中心的漂移速度和亮度衰减速度也不相同，从而加剧了全彩色LED显示面板的色度亮度不均匀性，也给色度和亮度均匀性校正带来更大困难。
发明内容
有鉴于此，本发明提供一种显示补偿信息的获取方法、显示补偿方法及装置，用于解决现有的显示面板亮度和色度均一性差的问题。
为解决上述技术问题，本发明采用以下技术方案：
第一方面，本发明提供一种显示补偿信息的获取方法，包括：
获取显示面板显示的纯色图像中的目标数据，所述显示面板包括多个像素，每个所述像素包括多种颜色的单色发光器件，所述显示面板显示所述纯 色图像时，对应颜色的单色发光器件显示最高灰阶；
根据所述目标数据，确定所述显示面板的目标色域的转换矩阵和每个所述像素的像素转换矩阵；
根据所述像素转换矩阵和所述目标色域的转换矩阵，确定用于对每个所述像素进行亮度和色度均一性补偿的均一性转换矩阵。
可选的，所述目标数据包括：所述单色发光器件的色坐标和亮度；根据所述目标数据，确定所述显示面板的目标色域的转换矩阵包括：
获取同一颜色的所有所述单色发光器件的亮度中的最小亮度作为目标亮度；
根据每种颜色的单色发光器件的所述目标亮度和目标色坐标，确定所述显示面板的目标色域的转换矩阵。
可选的，根据每种颜色的单色发光器件的所述目标亮度和目标色坐标，确定所述显示面板的目标色域的转换矩阵之前还包括：
确定每种颜色的单色发光器件的目标色坐标，其中，每种颜色的单色发光器件的目标色坐标围成的目标色域能够被每一所述像素的所述多种颜色的单色发光器件的色坐标围成的色域所包围。
可选的，每个所述像素包括三种颜色的单色发光器件；所述目标色域的转换矩阵为：
Figure PCTCN2021112275-appb-000001
其中，(x t_r，y t_r)为第一颜色的发光器件的目标色坐标，Y t_r为第一颜色的发光器件的目标亮度，(x t_g，y t_g)为第二颜色的发光器件的目标色坐标，Y t_g为第二颜色的发光器件的目标亮度，(x t_b，y t_b)为第三颜色的发光器件的目标色坐标，Y t_b为第三颜色的发光器件的目标亮度。
可选的，每个所述像素包括三种颜色的单色发光器件；所述目标数据包括：所述单色发光器件的色坐标和亮度；所述像素转换矩阵为：
Figure PCTCN2021112275-appb-000002
其中，(x r，y r)为第一颜色的发光器件在最高灰阶下的色坐标，Y r为第一颜色的发光器件在最高灰阶下的亮度，(x g，y g)为第二颜色的发光器件在最高灰阶下的色坐标，Y g为第二颜色的发光器件在最高灰阶下的亮度，(x b，y b)为第三颜色的发光器件在最高灰阶下的色坐标，Y b为第三颜色的发光器件在最高灰阶下的亮度。
可选的，所述目标数据包括：所述单色发光器件的色坐标和亮度；确定每个所述像素的像素转换矩阵包括：
针对每种颜色所述单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；
根据所述单色发光器件的色坐标随电流变化的拟合曲线和提取出的所述单色发光器件在最高灰阶下的色坐标，确定所述N个灰阶分段中每一段的色坐标波动系数；
根据所述色坐标波动系数确定每个所述像素的所述像素转换矩阵。
可选的，所述N为2。
可选的，每个所述像素包括三种颜色的单色发光器件；所述像素转换矩阵为：
Figure PCTCN2021112275-appb-000003
其中，(x r，y r)为第一颜色的发光器件在最高灰阶下的色坐标，Y r为第一颜色的发光器件在最高灰阶下的亮度，{f r1，f r2}为第一颜色的发光器件色坐标波动系数，(x g，y g)为第二颜色的发光器件在最高灰阶下的色坐标，Y g为第二颜色的发光器件在最高灰阶下的亮度，{f g1，f g2}为第二颜色的发光器件的色坐标波动系数，(x b，y b)为第三颜色的发光器件在最高灰阶下的色坐标，Y b为第三颜色的发光器件在最高灰阶下的亮度，{f b1，f b2}为第三颜色的发光器件的色坐标波动系数。
可选的，所述显示面板由多个显示子面板拼接而成；所述目标数据还包括：每个所述单色发光器件的坐标位置；所述方法还包括：
根据每个所述单色发光器件的坐标位置，确定相邻所述单色发光器件之间的距离；
根据相邻所述单色发光器件之间的距离，判断所述显示面板是否存在拼接缝以及拼接缝的亮暗；
根据判断结果，生成所述显示面板的拼缝粗补偿系数。
第二方面，本发明还提供一种显示补偿方法，包括：
获取显示面板的待显示图像；
根据存储的所述显示面板的均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿，所述均一性转换矩阵根据上述第一方面的显示补偿信息的获取方法得到。
可选的，根据存储的发光器件显示面板的目标亮度和均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿包括：
获取所述待显示图像中的每个像素的原始图像数据所属的灰阶分段，其中，针对每种颜色的单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；
根据每个像素的原始图像数据所属的灰阶分段，确定所述像素对应的均一性转换矩阵；
根据确定的均一性转换矩阵，对每个像素的原始图像数据进行亮度和色度均一性补偿。
可选的，所述显示面板由多个显示子面板拼接而成；所述方法还包括：
根据亮度和色度均一性补偿之后的图像数据和存储的所述显示面板的拼缝粗补偿系数，计算实际补偿系数；
根据所述实际补偿系数对所述亮度和色度均一性补偿之后的图像数据进行屏间拼缝补偿。
第三方面，本发明还提供一种显示补偿信息的获取装置，包括：
获取模块，用于获取显示面板显示的纯色图像中的目标数据，所述显示面板包括多个像素，每个所述像素包括多种颜色的单色发光器件，所述显示面板显示所述纯色图像时，对应颜色的单色发光器件显示最高灰阶；
第一确定模块，用于根据所述目标数据，确定所述显示面板的目标色域的转换矩阵和每个所述像素的像素转换矩阵；
第二确定模块，用于根据所述像素转换矩阵和所述目标色域的转换矩阵， 确定用于对每个所述像素进行亮度和色度均一性补偿的均一性转换矩阵。
第四方面，本发明还提供一种显示补偿装置，包括：
获取模块，用于获取显示面板的待显示图像；
均一化补偿模块，用于根据存储的所述显示面板的均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿，所述均一性转换矩阵根据上述第一方面的显示补偿信息的获取方法得到。
第四方面，本发明还提供一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现上述第一方面的显示补偿信息的获取方法的步骤；或者，所述程序或指令被处理器执行时实现上述第二方面的显示补偿方法的步骤。
本发明上述技术方案的有益效果如下：
通过对发光器件的亮度和色度进行理论映射，能够较好地改善显示面板的画质。
附图说明
图1为本发明一实施例的显示补偿方法的流程示意图；
图2为本发明实施例的显示补偿方法的整体架构示意图；
图3为本发明实施例的蓝色LED的色坐标x随电流(灰阶)y变化的拟合曲线示意图；
图4为本发明实施例的一个像素对应的8种均一化补偿矩阵的示意图；
图5为本发明另一实施例的显示补偿方法的流程示意图；
图6为本发明又一实施例的显示补偿方法的流程示意图；
图7为本发明又一实施例的显示补偿方法的流程示意图；
图8为本发明实施例的dither模板的示意图；
图9为本发明实施例的dither方法的示意图；
图10为本发明一实施例的显示补偿装置的示意图；
图11为本发明另一实施例的显示补偿装置的示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明保护的范围。
请参考图1，本发明的一实施例提供一种显示补偿信息的获取方法，应用于电子设备，该电子设备可以为个人电脑(PC)等计算处理设备，所述显示补偿信息的获取方法包括：
步骤11：获取显示面板显示的纯色图像中的目标数据，所述显示面板包括多个像素，每个所述像素包括多种颜色的单色发光器件，所述显示面板显示所述纯色图像时，对应颜色的单色发光器件显示最高灰阶；
本发明实施例中，可选的，所述显示面板可以是LED显示面板，或者其他类型的显示面板。LED显示面板例如可以为Mini LED显示面板、Micro LED显示面板等。
所述显示面板的像素可以包括多种颜色的单色发光器件，例如包括红色发光器件、绿色发光器件和蓝色发光器件。
所述目标数据包括：单色发光器件的特性信息数据，例如色坐标和亮度。
本发明实施例中，首先，需要控制显示面板分别显示与所述多种颜色的单色发光器件对应的纯色图像并进行图像的采集。
举例来说，假设显示面板的像素包括三种颜色的单色发光器，显示面板显示第一颜色图像时，每个像素中的第一颜色的发光器件点亮，且显示最高灰阶(例如255)，第二颜色和第三颜色的发光器件关闭；显示第二颜色图像时，每个像素中的第二颜色的发光器件点亮，且显示最高灰阶(例如255)，第一颜色和第三颜色的发光器件关闭；显示第三颜色的图像时，每个像素中的第三颜色的发光器件点亮，且显示最高灰阶(例如255)，第一颜色和第二颜色的发光器件关闭。
本发明实施例中，请参考图2，可以采用相机(例如工业相机)按照屏幕分辨率及采样率要求，采集显示面板的屏幕，得到多种颜色的纯色图像，并且，还可以利用相机从多种颜色的纯色图像中提取出目标数据，并输入至 上述电子设备(例如PC)。当然，在本发明的其他一些实施例中，也可以将相机采集的纯色图像输入至上述电子设备中，由电子设备从纯色图像中提取出目标数据。
步骤12：根据所述目标数据，确定所述显示面板的目标色域的转换矩阵和每个所述像素的像素转换矩阵；
在本发明的一些实施例中，可以分别确定每个像素的像素转换矩阵，也可以是针对相同bin的像素组成一个像素集合，确定像素集合的像素转换矩阵。
步骤13：根据所述像素转换矩阵和所述目标色域的转换矩阵，确定用于对每个所述像素进行亮度和色度均一性补偿的均一性转换矩阵。
显示面板的目标色域为每种颜色的单色发光器件需要达到的目标色坐标围成的区域，例如，显示面板包括红、绿、蓝三种颜色的发光器件，红色发光器件需要达到的目标色坐标为(x r，y r)，绿色发光器件需要达到的目标色坐标为(x g，y g),蓝色发光器件需要达到的目标色坐标为(x b，y b)，三个色坐标连线围成的三角形区域成为显示面板的目标色域。
下面对上述均一化转换矩阵的推导过程进行说明。
本发明实施例中，对待显示图像进行均一化处理包括亮度均一化和色度均一化。
对于亮度均一化：可以获取同一颜色的所有所述单色发光器件的亮度中的最小亮度作为目标亮度，在进行亮度均一化处理时，可以将所有所述单色发光器件的亮度校正为对应的目标亮度。
举例来说，假设显示面板包括红、绿、蓝三种颜色的发光器件，则上述纯色图像包括：红色图像、绿色图像和蓝色图像，电子设备统计红色图像中的每个红色发光器件的亮度，将亮度最小的红色发光器件的亮度作为所有红色发光器件的目标亮度，统计绿色图像中的每个绿色发光器件的亮度，将亮度最小的绿色发光器件的亮度作为所有绿色发光器件的目标亮度，统计蓝色图像中的每个蓝色发光器件的亮度，将亮度最小的蓝色发光器件的亮度作为所有蓝色发光器件的目标亮度。
对于色度均一化：本发明实施例中，可以逐像素(pixel)进行色度补偿， 分别将一个像素的多种颜色的单色发光器件校正到对应的色坐标。
本申请实施例中，色度均一化处理利用的色度理论公式如下(假设输入的待显示图像的原始图像数据为RGB值)：
Figure PCTCN2021112275-appb-000004
对于公式①：用于求显示面板的待显示图像的RGB值在目标色域下的XYZ(三刺激值)，C target为目标色域的转换矩阵，{R；G；B}为待显示图像的RGB值；
对于公式②：用于求目标色域下的XYZ在各像素色域处的RGB值，
Figure PCTCN2021112275-appb-000005
为各像素的像素转换矩阵C pixel的逆矩阵，{R out；G out；B out}为待显示图像经过色度均一化后的线性RGB值，即输入该值给显示面板后，显示面板能显示均一化较好的图像。
合并公式①和②，得到：
Figure PCTCN2021112275-appb-000006
其中，
Figure PCTCN2021112275-appb-000007
即为本发明实施例中的均一性转换矩阵，gamma是显示面板的伽马值，例如可以为2.2。
本发明实施例中，像素的C pixel可以为一个3×3的矩阵，当然，
Figure PCTCN2021112275-appb-000008
也为一个3×3的矩阵。像素的C pixel的计算与该像素的单色发光器件的色坐标有关，假设某个像素包括第一颜色的发光器件、第二颜色的发光器件和第三颜色的发光器件，第一颜色的发光器件的色坐标为(x r,y r)，亮度为Y r，第二颜色的发光器件的色坐标为(x g,y g)，亮度为Y g，第三颜色的发光器件的色坐标为(x b,y b)，亮度为Y b，则该像素的C pixel可以为：
Figure PCTCN2021112275-appb-000009
下面对目标色域的转换矩阵的确定方法进行说明。
本发明实施例中，可选的，所述目标数据包括：所述单色发光器件的色坐标和亮度；根据所述目标数据，确定所述显示面板的目标色域的转换矩阵包括：
获取同一颜色的所有所述单色发光器件的亮度中的最小亮度作为目标亮度；
根据每种颜色的单色发光器件的所述目标亮度和目标色坐标，确定所述显示面板的目标色域的转换矩阵。
本发明实施例中，目标色域的转换矩阵C target也可以为一个3×3的矩阵。假设每个所述像素包括三种颜色的单色发光器件；所述目标色域的转换矩阵为：
Figure PCTCN2021112275-appb-000010
其中，(x t_r，y t_r)为第一颜色的发光器件的目标色坐标，Y t_r为第一颜色的发光器件的目标亮度，(x t_g，y t_g)为第二颜色的发光器件的目标色坐标，Y t_g为第二颜色的发光器件的目标亮度，(x t_b，y t_b)为第三颜色的发光器件的目标色坐标，Y t_b为第三颜色的发光器件的目标亮度。
Figure PCTCN2021112275-appb-000011
的结果是一个3×3的系数矩阵。
然而，单色发光器件的色坐标并不是一成不变的，会随流经其的电流(即灰阶)的变化而产生变化，请参考图3，图3为一显示面板的蓝色发光器件的色坐标x随电流(灰阶)y变化的拟合曲线。而上述像素的C pixel计算时，只考虑单色发光器件的最高灰阶(如255)下的色坐标，如果所有灰阶下的色坐标都用最高灰阶下的色坐标表示，会影响最后的补偿结果。因而，本发明实施例中，可以将单色发光器件的色坐标随电流变化的色坐标波动系数加入上述像素的C pixel的计算，得到更准确地C pixel。
以图3中的蓝色发光器件为例进行说明，蓝色发光器件的实际电流使用区间为[0,0.56]，当将电流分为64段时，电流元为is＝0.56/64，可以根据拟合 曲线分别计算对应电流分段n*is(n＝1,2,…64)对应的色坐标，每段的色坐标除以第64段电流对应的色坐标即为色坐标波动系数。
此时，假设每个所述像素包括三种颜色的单色发光器件；所述像素转换矩阵为：
Figure PCTCN2021112275-appb-000012
其中，(x r，y r)为第一颜色的发光器件在最高灰阶下的色坐标，Y r为第一颜色的发光器件在最高灰阶下的亮度，{f r1，f r2}为第一颜色的发光器件色坐标波动系数，(x g，y g)为第二颜色的发光器件在最高灰阶下的色坐标，Y g为第二颜色的发光器件在最高灰阶下的亮度，{f g1，f g2}为第二颜色的发光器件的色坐标波动系数，(x b，y b)为第三颜色的发光器件在最高灰阶下的色坐标，Y b为第三颜色的发光器件在最高灰阶下的亮度，{f b1，f b2}为第三颜色的发光器件的色坐标波动系数。
考虑到硬件存储资源，本发明实施例中，可以对能够显示的所有灰阶(如0～255)进行分段处理，针对每个颜色的单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；然后，根据所述单色发光器件的色坐标随电流变化的拟合曲线和提取出的所述单色发光器件在最高灰阶下的色坐标，确定所述N个灰阶分段中每一段的色坐标波动系数；根据所述色坐标波动系数确定每个像素集合的所述像素转换矩阵。
最简单的，可以将每个颜色的单色发光器件能够显示的所有灰阶分为两段(高灰阶和低灰阶)，在进行显示补偿时，可以逐像素将待显示图像的原始图像数据根据阈值(rth/gth/bth)进行分段，大于阈值为高灰阶，对应的色坐标为高灰阶下的色坐标，标志位可以设置为1，反之，对应的色坐标为低灰阶下的色坐标，标志位可以设置为0。
上述阈值的确定方法可以为：首先预估最大灰阶均一性补偿后的灰阶，然后计算补偿后的灰阶对应的电流分段，取该电流分段的1/2对应的输入灰阶为阈值灰阶，例如255灰阶补偿后的灰阶对应的电流分段为第44段，通过计算200灰阶补偿后的灰阶对应第22段电流，那么阈值就设为200灰阶，小 于200灰阶的输入灰阶对应的色坐标均为第22段电流对应的色坐标，大于等于200的输入灰阶对应的色坐标为第44段电流对应的色坐标。需要了解的是，也可以不是取该电流分段的1/2对应的输入灰阶为阈值灰阶，本发明实施例取1/2为例说明。此外，本发明实施例中，不同颜色的单色发光器件对应的阈值可以相同，也可以不同。
本发明实施例中，假设所述N为2，每个像素集合对应8个所述像素转换矩阵，请参考图4，图4中，RGB为灰阶，大于阈值为高灰阶，对应的色坐标为高灰阶下的色坐标，标志位可以设置为1，反之，对应的色坐标为低灰阶下的色坐标，标志位可以设置为0，最后一列为均一化补充矩阵的编号。
下面对目标色域的确定方法进行说明。
本发明实施例中，目标色域的选取原则为要被所有像素的色域包围，即每种颜色的单色发光器件的目标色坐标围成的目标色域能够被每一所述像素的所述多种颜色的单色发光器件的色坐标围成的色域所包围。可选的，对于显示面板上的所有像素的色域以及每个像素根据灰阶分类得到的8种色域三角形，选取它们相交的较小色域三角形作为目标色域三角形。
本发明实施例中的显示面板可以由多个显示子面板拼接而成；当多个小的显示子面板拼接成大的显示面板时，由于各种因素显示子面板之间可能会出现拼缝，影响视效。为了解决该问题，请参考图2和图5，可选的，在上述步骤11中，从获取到的纯色图像中的目标数据中还可以包括：每个单色发光器件(也可以称为灯点)的坐标位置；所述方法还包括：
步骤14：根据每个单色发光器件的坐标位置，确定相邻单色发光器件之间的距离；
步骤15：根据相邻单色发光器件之间的距离，判断所述显示面板是否存在拼接缝以及拼接缝的亮暗；
拼接缝两侧的发光器件之间的距离可能会大于或小于显示子面板内的相邻单色发光器件之间的距离。当拼接缝两侧的发光器件之间的距离大于显示子面板内的相邻单色发光器件之间的距离时，拼接缝可能为暗缝，当拼接缝两侧的发光器件之间的距离小于显示子面板内的相邻单色发光器件之间的距离时，拼接缝可能为亮缝。
步骤16：根据判断结果，生成所述显示面板的拼缝粗补偿系数。
本发明实施例中，针对显示面板(尤其是拼接得到的大的显示面板)的色度、亮度不均匀的问题，从色度学理论的基本原理出发得到用于对显示面板进行亮度和色度均一性补偿的均一性转换矩阵，以测试图片上屏验证上述均一性转换矩阵，补偿后的色坐标和亮度均一性满足指标要求，色坐标x，y差别被控制在0.003以内，亮度均一性大于98％，验证了该方法的正确性和可执行性。
请参考图6，本发明的实施例还提供一种显示补偿方法，应用于显示装置，所述显示装置包括显示面板，所述显示补偿方法包括：
步骤61：获取显示面板的待显示图像；
步骤62：根据存储的所述显示面板的均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿，所述均一性转换矩阵根据上述任一实施例中的显示补偿方法得到。
假设输入的待显示图像的原始图像数据为RGB数据，均一性补偿后的RGB数据{R out；G out；B out}可以通过下述公式计算：
Figure PCTCN2021112275-appb-000013
其中，C i为均一化补偿矩阵，RGB为亮度和色度均一化补偿之前的数据。
本发明实施例中，通过对单色发光器件的亮度和色度进行理论映射，能够较好地改善显示面板的画质。
本发明实施例中，上述显示补偿方法可以由显示装置中的驱动IC(驱动集成电路，本发明实施例中也称为IC端)执行，请参考图2，图2中的接收卡用于接收待显示图像，并传输给IC(Mini TX IC)，IC根据PC端计算得到的均一化转换对所述待显示图像逐像素进行亮度和色度均一性补偿(即图2中的均一性计算)，图2中的RX为LED显示面板。
在本发明的一些实施例中，单色发光器件的色坐标会随电流(灰阶)变化，因而，本发明实施例中，PC端针对显示面板的每种颜色的单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，并计算像素的每种颜色单色发光器件为不同灰阶分段时，对应的均一性转换矩阵，此时，请参考图7，可 选的，根据存储的显示面板的目标亮度和均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿包括：
步骤621：获取所述待显示图像中的每个像素的原始图像数据所属的灰阶分段，其中，针对每种颜色的单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；
步骤622：根据每个像素的原始图像数据所属的灰阶分段，确定所述像素对应的均一性转换矩阵；
步骤623：根据确定的均一性转换矩阵，对每个像素的原始图像数据进行亮度和色度均一性补偿。
本发明实施例中，请参考图4，假设所述N为2，每个像素对应8个像素转换矩阵，RGB数据大于对应的阈值为高灰阶，对应的色坐标为高灰阶下的色坐标，标志位可以设置为1，反之，对应的色坐标为低灰阶下的色坐标，标志位可以设置为0，根据RGB数据对应的标志位，获取对应的均一化补偿矩阵。
本发明实施例中，在进行均一化补偿时，将单色发光器件色域随灰阶变化的波动系数加入算法，使得补偿更加精确。
本发明实施例中，可选的，请参考图2，对所述待显示图像逐像素进行亮度和色度均一性补偿之前还包括：将所述待显示图像的原始图像数据映射为符合目标gamma曲线的线性数据(即图2中的输入映射LUT)；在映射时，需要满足接收卡的多种输入模式(16bit、10bit或8bit等)，例如，如接收卡输入的为16bit(或10bit或8bit)的线性数据，将16bit(或10bit或8bit)的线性数据转换为29bit的线性数据。
由于均一性矩阵计算会产生小数，本发明实施例中，可以预留2bit精准实现目标转换灰阶，且根据显示面板的分辨率的特性选择对应的dither(抖动)模式，使得灰阶过渡更平滑。
本发明实施例中，请参考图8，dither算法的原理为：
在空域上，将显示面板划分为M*M个区域，例如图8所示的实施例中，将显示面板划分为4*4个区域。
在时域上，S帧一循环，例如图8所示的实施例中，在时域上8帧(F0-F7) 一循环。
具体算法执行时：
首先根据当前帧的帧数和像素灰阶的末尾余数(00,01,10,11)确定使用哪个模板(图8中的4*4模板)，然后根据像素所属的区域确定模板中对应位置的数字w。
本发明实施例中，可以根据LED显示面板的分辨率能否被4整除设计两种dither模式，针对无法被4整除的分辨率，dither无法解决边缘像素平滑过渡问题，前4的倍数列/行与4*4模板的dither处理相同，剩下的列/行模板为3*4或2*4或1*4。
如图9所示，以第2帧(F1)的第一个像素的灰阶4074.9的dither为例：
Input＝12’d4075＝10’b1111111010_11
Output＝{10’d1018,2’b3}
即输入为10’b1111111010_11，余数为11，所以对应F1-11模板，由于是第一个像素，其所属模板的区域为左上第一个，即此时w为1，所以输出1018+1；若纵向分辨率被4除余2，余出来的2列与模板的左侧2列进行判断处理即可。
本发明实施例中，可选的，若所述LED显示面板由多个显示子面板拼接而成；请参考图2，为了减弱拼接缝对视效的影响，本发明实施例中，PC端根据单色发光器件之间的距离，确定拼接缝的位置以及拼接缝的是亮缝还是暗缝，从而生成拼缝粗补偿系数，IC端存储所述拼缝粗补偿系数，并根据待显示图像以及拼缝粗补偿系数计算实际补偿系数，对每个小的显示子面板的边缘像素进行补偿，减弱拼接缝对视效的影响。即，所述方法还包括：根据亮度和色度均一性补偿之后的图像数据和存储的所述显示面板的拼缝粗补偿系数，计算实际补偿系数；根据所述实际补偿系数对所述亮度和色度均一性补偿之后的图像数据进行屏间拼缝补偿。
可选的，屏间拼缝补偿后的RGB数据{R out_1；G out_1；B out_1}可以通过下述公式计算：
Figure PCTCN2021112275-appb-000014
其中，{R out；G out；B out}为均一性补偿后的RGB数据，k为实际补偿系数，{b r；b g；b b}为补偿灰阶。
本发明实施例中，屏间拼缝补偿的步骤位于均一性补偿之后。
其中，若在对所述待显示图像逐像素进行亮度和色度均一性补偿之前，执行了将所述待显示图像的原始图像数据映射为符合目标gamma曲线的线性数据的步骤，则对所述待显示图像逐像素进行亮度和色度均一性补偿或者屏间拼缝补偿之后还包括：将亮度和色度均一性补偿之后或屏间拼缝补偿之后的图像数据转换为符合目标数值比特(例如16bit)线性灰阶的图像数据。
本发明实施例中，可选的，请参考图2，所述显示补偿方法还包括：将符合目标数值比特的图像数据映射到目标电流和PWM(脉冲宽度调制)数值上(由图2中的Gamma IP模块执行)。本发明实施例中，低灰阶用电流和PWM方式精确表达，能够增强低灰阶区分度，避免细节损失。
可选的，将16bit线性灰阶(符合目标数值比特的RGB数据)映射到6bit电流和10bit PWM上，具体的映射方法通过查找表实现，查找表可以如下：
表1
线性灰阶 电流 PWM
0 I0 0
0<L<＝1024 I0 (L-0)*IPWM
1024<L<＝2048 I1 (L-1024)*IPWM
… … …
64511<L<＝65535 I63 (L-64511)*IPWM
其中，IPWM为一个灰阶对应的平均电流。
查找表的具体方法为：查找表的深度为64，分别是1024*[0:63]，分别对应电流[I0:I63]和PWM 0，当线性灰阶为1024的非整数倍时，如1025，那么查表可知，其对应的电流为I1，PWM值为(1025-1024)*IPWM。经过查表映射，所有线性灰阶均能用电流和PWM精确表示。
本发明实施例中，若不需要进行均一化补偿和屏间拼缝补偿，请参考图2，也可以直接将接收卡接收到的原始图像数据直接Bypass给显示面板。
请参考图10，本发明实施例还提供一种显示补偿信息的获取装置，包括：
获取模块，用于获取显示面板显示的纯色图像中的目标数据，所述显示面板包括多个像素，每个所述像素包括多种颜色的单色发光器件，所述显示面板显示所述纯色图像时，对应颜色的单色发光器件显示最高灰阶；
第一确定模块，用于根据所述目标数据，确定所述显示面板的目标色域的转换矩阵和每个所述像素的像素转换矩阵；
第二确定模块，用于根据所述像素转换矩阵和所述目标色域的转换矩阵，确定用于对每个所述像素进行亮度和色度均一性补偿的均一性转换矩阵。
可选的，所述目标数据包括：所述单色发光器件的色坐标和亮度；
所述第一确定模块，用于获取同一颜色的所有所述单色发光器件的亮度中的最小亮度作为目标亮度；根据每种颜色的单色发光器件的所述目标亮度和目标色坐标，确定所述显示面板的目标色域的转换矩阵。
可选的，所述显示补偿信息的获取装置还包括：
第三确定模块，用于确定每种颜色的单色发光器件的目标色坐标，其中，每种颜色的单色发光器件的目标色坐标围成的目标色域能够被每一所述像素的所述多种颜色的单色发光器件的色坐标围成的色域所包围。
可选的，每个所述像素包括三种颜色的单色发光器件；所述目标色域的转换矩阵为：
Figure PCTCN2021112275-appb-000015
其中，(x t_r，y t_r)为第一颜色的发光器件的目标色坐标，Y t_r为第一颜色的发光器件的目标亮度，(x t_g，y t_g)为第二颜色的发光器件的目标色坐标，Y t_g为第二颜色的发光器件的目标亮度，(x t_b，y t_b)为第三颜色的发光器件的目标色坐标，Y t_b为第三颜色的发光器件的目标亮度。
可选的，每个所述像素包括三种颜色的单色发光器件；所述目标数据包括：所述单色发光器件的色坐标和亮度；所述像素转换矩阵为：
Figure PCTCN2021112275-appb-000016
其中，(x r，y r)为第一颜色的发光器件在最高灰阶下的色坐标，Y r为第一颜色的发光器件在最高灰阶下的亮度，(x g，y g)为第二颜色的发光器件在最高灰阶下的色坐标，Y g为第二颜色的发光器件在最高灰阶下的亮度，(x b，y b)为第三颜色的发光器件在最高灰阶下的色坐标，Y b为第三颜色的发光器件在最高灰阶下的亮度。
可选的，所述目标数据包括：所述单色发光器件的色坐标和亮度；
所述第一确定模块，用于针对每种颜色所述单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；根据所述单色发光器件的色坐标随电流变化的拟合曲线和提取出的所述单色发光器件在最高灰阶下的色坐标，确定所述N个灰阶分段中每一段的色坐标波动系数；根据所述色坐标波动系数确定每个所述像素的所述像素转换矩阵。
可选的，所述N为2。
可选的，每个所述像素包括三种颜色的单色发光器件；所述像素转换矩阵为：
Figure PCTCN2021112275-appb-000017
其中，(x r，y r)为第一颜色的发光器件在最高灰阶下的色坐标，Y r为第一颜色的发光器件在最高灰阶下的亮度，{f r1，f r2}为第一颜色的发光器件色坐标波动系数，(x g，y g)为第二颜色的发光器件在最高灰阶下的色坐标，Y g为第二颜色的发光器件在最高灰阶下的亮度，{f g1，f g2}为第二颜色的发光器件的色坐标波动系数，(x b，y b)为第三颜色的发光器件在最高灰阶下的色坐标，Y b为第三颜色的发光器件在最高灰阶下的亮度，{f b1，f b2}为第三颜色的发光器件的色坐标波动系数。
可选的，所述显示面板由多个显示子面板拼接而成；所述目标数据还包括：每个所述单色发光器件的坐标位置；所述显示补偿信息的获取装置还包括：
第四确定模块，用于根据每个所述单色发光器件的坐标位置，确定相邻所述单色发光器件之间的距离；
判断模块，用于根据相邻所述单色发光器件之间的距离，判断所述显示面板是否存在拼接缝以及拼接缝的亮暗；
生成模块，用于根据判断结果，生成所述显示面板的拼缝粗补偿系数。
请参考图11，本发明实施例还提供一种显示补偿装置，包括：
获取模块，用于获取显示面板的待显示图像；
均一化补偿模块，用于根据存储的所述显示面板的均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿，所述均一性转换矩阵根据上述应用于电子设备的显示补偿方法得到。
可选的，所述均一化补偿模块，用于获取所述待显示图像中的每个像素的原始图像数据所属的灰阶分段，其中，针对每种颜色的单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；根据每个像素的原始图像数据所属的灰阶分段，确定所述像素对应的均一性转换矩阵；根据确定的均一性转换矩阵，对每个像素的原始图像数据进行亮度和色度均一性补偿。
可选的，所述显示补偿装置还包括：
第一映射模块，用于将所述待显示图像的原始图像数据映射为符合目标gamma曲线的线性数据；
转换模块，用于将亮度和色度均一性补偿之后的图像数据转换为符合目标数值比特线性灰阶的图像数据。
可选的，所述显示面板由多个显示子面板拼接而成；显示补偿装置还包括：
计算模块，用于根据亮度和色度均一性补偿之后的图像数据和存储的所述显示面板的拼缝粗补偿系数，计算实际补偿系数；
屏间拼缝补偿模块，用于根据所述实际补偿系数对所述亮度和色度均一性补偿之后的图像数据进行屏间拼缝补偿。
可选的，显示补偿装置还包括：
第二映射模块，用于将亮度和色度均一性补偿之后的图像数据映射到目标电流和PWM数值上。
本申请实施例还提供一种电子设备，包括处理器，存储器，存储在存储 器上并可在所述处理器上运行的程序或指令，该程序或指令被处理器执行时实现上述应用于电子设备的显示补偿信息的获取方法实施例的各个过程，且能达到相同的技术效果。
本申请实施例还提供一种显示装置，包括处理器，存储器，存储在存储器上并可在所述处理器上运行的程序或指令，该程序或指令被处理器执行时实现上述应用于显示装置的显示补偿方法实施例的各个过程，且能达到相同的技术效果。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述应用于电子设备的显示补偿信息的获取方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述应用于显示装置的显示补偿方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
其中，所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
以上所述是本发明的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (15)

  1. 一种显示补偿信息的获取方法，其特征在于，包括：
    获取显示面板显示的纯色图像中的目标数据，所述显示面板包括多个像素，每个所述像素包括多种颜色的单色发光器件，所述显示面板显示所述纯色图像时，对应颜色的单色发光器件显示最高灰阶；
    根据所述目标数据，确定所述显示面板的目标色域的转换矩阵和每个所述像素的像素转换矩阵；
    根据所述像素转换矩阵和所述目标色域的转换矩阵，确定用于对每个所述像素进行亮度和色度均一性补偿的均一性转换矩阵。
  2. 如权利要求1所述的方法，其特征在于，所述目标数据包括：所述单色发光器件的色坐标和亮度；根据所述目标数据，确定所述显示面板的目标色域的转换矩阵包括：
    获取同一颜色的所有所述单色发光器件的亮度中的最小亮度作为目标亮度；
    根据每种颜色的单色发光器件的所述目标亮度和目标色坐标，确定所述显示面板的目标色域的转换矩阵。
  3. 如权利要求2所述的方法，其特征在于，根据每种颜色的单色发光器件的所述目标亮度和目标色坐标，确定所述显示面板的目标色域的转换矩阵之前还包括：
    确定每种颜色的单色发光器件的目标色坐标，其中，每种颜色的单色发光器件的目标色坐标围成的目标色域能够被每一所述像素的所述多种颜色的单色发光器件的色坐标围成的色域所包围。
  4. 如权利要求2所述的方法，其特征在于，每个所述像素包括三种颜色的单色发光器件；所述目标色域的转换矩阵为：
    Figure PCTCN2021112275-appb-100001
    其中，(x t_r，y t_r)为第一颜色的发光器件的目标色坐标，Y t_r为第一颜色的发光器件的目标亮度，(x t_g，y t_g)为第二颜色的发光器件的目标色坐标，Y t_g为第二颜色的发光器件的目标亮度，(x t_b，y t_b)为第三颜色的发光器件的目标色坐标，Y t_b为第三颜色的发光器件的目标亮度。
  5. 如权利要求1所述的方法，其特征在于，每个所述像素包括三种颜色的单色发光器件；所述目标数据包括：所述单色发光器件的色坐标和亮度；所述像素转换矩阵为：
    Figure PCTCN2021112275-appb-100002
    其中，(x r，y r)为第一颜色的发光器件在最高灰阶下的色坐标，Y r为第一颜色的发光器件在最高灰阶下的亮度，(x g，y g)为第二颜色的发光器件在最高灰阶下的色坐标，Y g为第二颜色的发光器件在最高灰阶下的亮度，(x b，y b)为第三颜色的发光器件在最高灰阶下的色坐标，Y b为第三颜色的发光器件在最高灰阶下的亮度。
  6. 如权利要求1所述的方法，其特征在于，所述目标数据包括：所述单色发光器件的色坐标和亮度；确定每个所述像素的像素转换矩阵包括：
    针对每种颜色所述单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；
    根据所述单色发光器件的色坐标随电流变化的拟合曲线和提取出的所述单色发光器件在最高灰阶下的色坐标，确定所述N个灰阶分段中每一段的色坐标波动系数；
    根据所述色坐标波动系数确定每个所述像素的所述像素转换矩阵。
  7. 如权利要求6所述的方法，其特征在于，所述N为2。
  8. 如权利要求6所述的方法，其特征在于，每个所述像素包括三种颜色的单色发光器件；所述像素转换矩阵为：
    Figure PCTCN2021112275-appb-100003
    其中，(x r，y r)为第一颜色的发光器件在最高灰阶下的色坐标，Y r为第一颜色的发光器件在最高灰阶下的亮度，{f r1，f r2}为第一颜色的发光器件色坐标波动系数，(x g，y g)为第二颜色的发光器件在最高灰阶下的色坐标，Y g为第二颜色的发光器件在最高灰阶下的亮度，{f g1，f g2}为第二颜色的发光器件的色坐标波动系数，(x b，y b)为第三颜色的发光器件在最高灰阶下的色坐标，Y b为第三颜色的发光器件在最高灰阶下的亮度，{f b1，f b2}为第三颜色的发光器件的色坐标波动系数。
  9. 如权利要求1所述的方法，其特征在于，所述显示面板由多个显示子面板拼接而成；所述目标数据还包括：每个所述单色发光器件的坐标位置；所述方法还包括：
    根据每个所述单色发光器件的坐标位置，确定相邻所述单色发光器件之间的距离；
    根据相邻所述单色发光器件之间的距离，判断所述显示面板是否存在拼接缝以及拼接缝的亮暗；
    根据判断结果，生成所述显示面板的拼缝粗补偿系数。
  10. 一种显示补偿方法，其特征在于，包括：
    获取显示面板的待显示图像；
    根据存储的所述显示面板的均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿，所述均一性转换矩阵根据权利要求1-9任一项所述的显示补偿信息的获取方法得到。
  11. 如权利要求10所述的方法，其特征在于，根据存储的发光器件显示面板的目标亮度和均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿包括：
    获取所述待显示图像中的每个像素的原始图像数据所属的灰阶分段，其中，针对每种颜色的单色发光器件，将能够显示的所有灰阶划分成N个灰阶分段，N为大于或等于2的正整数；
    根据每个像素的原始图像数据所属的灰阶分段，确定所述像素对应的均一性转换矩阵；
    根据确定的均一性转换矩阵，对每个像素的原始图像数据进行亮度和色度均一性补偿。
  12. 如权利要求10所述的显示补偿方法，其特征在于，所述显示面板由多个显示子面板拼接而成；所述方法还包括：
    根据亮度和色度均一性补偿之后的图像数据和存储的所述显示面板的拼缝粗补偿系数，计算实际补偿系数；
    根据所述实际补偿系数对所述亮度和色度均一性补偿之后的图像数据进行屏间拼缝补偿。
  13. 一种显示补偿信息的获取装置，其特征在于，包括：
    获取模块，用于获取显示面板显示的纯色图像中的目标数据，所述显示面板包括多个像素，每个所述像素包括多种颜色的单色发光器件，所述显示面板显示所述纯色图像时，对应颜色的单色发光器件显示最高灰阶；
    第一确定模块，用于根据所述目标数据，确定所述显示面板的目标色域的转换矩阵和每个所述像素的像素转换矩阵；
    第二确定模块，用于根据所述像素转换矩阵和所述目标色域的转换矩阵，确定用于对每个所述像素进行亮度和色度均一性补偿的均一性转换矩阵。
  14. 一种显示补偿装置，其特征在于，包括：
    获取模块，用于获取显示面板的待显示图像；
    均一化补偿模块，用于根据存储的所述显示面板的均一性转换矩阵，对所述待显示图像逐像素进行亮度和色度均一性补偿，所述均一性转换矩阵根据权利要求1-9任一项所述的显示补偿信息的获取方法得到。
  15. 一种可读存储介质，其特征在于，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如权利要求1-9任一项所述的显示补偿信息的获取方法的步骤；或者，所述程序或指令被处理器执行时实现如权利要求10-12任一项所述的显示补偿方法的步骤。
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