CN114495803A - Mura repairing method of display panel - Google Patents
Mura repairing method of display panel Download PDFInfo
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- CN114495803A CN114495803A CN202210327988.7A CN202210327988A CN114495803A CN 114495803 A CN114495803 A CN 114495803A CN 202210327988 A CN202210327988 A CN 202210327988A CN 114495803 A CN114495803 A CN 114495803A
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- 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
- G09G3/2074—Display of intermediate tones using sub-pixels
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- 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
- G09G3/22—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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a mura repairing method of a display panel, which comprises the following steps: acquiring a first gray image of a white picture displayed by a display panel after all sub-pixels are simultaneously lightened by using a monochrome camera; positioning the sub-pixels to obtain position information of the sub-pixels of each color, acquiring brightness data of the sub-pixels of different colors of the display panel from the first gray image according to the position information, and performing mura repair on the display panel according to the brightness data of the sub-pixels of each color; the invention obtains the brightness data of all sub-pixels of the display panel by utilizing the high resolution characteristic of the monochrome camera, and then obtains the position information of each sub-pixel by positioning the sub-pixels, thereby further identifying the brightness data of the sub-pixels with different colors from the brightness data of all the sub-pixels and carrying out mura repair on the display panel.
Description
Technical Field
The invention belongs to the technical field of panel display, and particularly relates to a mura repairing method of a display panel.
Background
For the OLED screen, especially when displaying low gray scale (black or gray image), the brightness of the white image is not the sum of the separately measured R, G, B images due to crosstalk between adjacent pixels. In the worst case, reddish color can be observed in white pictures at low gray levels, which is direct evidence of pixel crosstalk.
Currently, when the display screen is optically compensated, the screen is usually controlled to display R, G, B color pictures respectively, and then the G picture and/or R, B picture of the display screen are compensated separately, but this compensation method is not suitable for white pictures with higher requirement on uniformity. To eliminate the non-uniformity of the OLED display, a Demura algorithm is proposed. However, the Demura algorithm is only successfully applied to the Mura detection and processing of R, G, B individual frames, but as mentioned above, the brightness of the white frame is not the sum of the separately measured R, G, B frames due to the crosstalk between adjacent pixels; therefore, the current optical compensation method cannot achieve the expected effect when applied to the white picture, and the optical compensation result is not ideal.
Therefore, it is desirable to provide a technique for optically compensating a white picture in which R, G, B sub-pixels are simultaneously lit.
Disclosure of Invention
Aiming at least one defect or improvement requirement in the prior art, the invention provides a mura repairing method of a display panel, which comprises the steps of shooting a white picture displayed by the display panel after the display panel simultaneously lights sub-pixels of all colors by using a monochrome camera, identifying and separating the positions of the sub-pixels of all colors in the white picture by using the monochrome picture, and then respectively carrying out non-uniformity detection, analysis and compensation on the sub-pixels of all colors; the uniformity adjustment of the white picture for simultaneously lightening the sub-pixels of each color is realized, the uneven light emission among the sub-pixels of each color when the display panel displays the white picture is improved, and the adjustment precision is improved.
To achieve the above object, according to a first aspect of the present invention, there is provided a mura repairing method of a display panel, including:
acquiring a first gray image of a white picture displayed by a display panel after all sub-pixels are simultaneously lightened by using a monochrome camera;
positioning the sub-pixels to obtain the position information of the sub-pixels of each color;
recognizing the brightness data of each color sub-pixel of the display panel from the first gray scale image according to the position information;
and performing mura repair on the display panel according to the brightness data of the sub-pixels of each color.
Further, the mura repairing method for the display panel, which locates the sub-pixels to obtain the position information of the sub-pixels of each color, includes:
at least lightening one single-color picture of the display panel, and acquiring a corresponding single-color picture by using the single-color camera;
carrying out binarization processing on the acquired image of the monochromatic picture to generate a position mask;
and identifying the positions of the sub-pixels of each color from the first gray scale image by using the position mask.
Further, the mura repairing method for the display panel, in which at least one monochrome picture of the display panel is lit, and the corresponding monochrome picture is acquired by using the monochrome camera, includes:
lightening all R pixels of the display panel to obtain a second gray image;
lightening all G pixels of the display panel to obtain a third gray image;
lightening all B pixels of the display panel to obtain a fourth gray image;
respectively carrying out binarization processing on the second, third and fourth gray level images to generate position masks;
and identifying the position of the corresponding single-color sub-pixel from the first gray-scale image according to the position mask.
Further, the mura repairing method for the display panel, which locates the sub-pixels to obtain the position information of the sub-pixels of each color, includes:
and analyzing the first gray level image to obtain the position information of each color sub-pixel.
Furthermore, the mura repairing method of the display panel,
and obtaining the position information of each sub-pixel according to the size and shape information of each sub-pixel in the first gray scale image.
Furthermore, the mura repairing method of the display panel,
the pixel size of the monochrome camera is not larger than the distance between the image points of the display screen.
Further, in the mura repairing method for the display panel, the monochrome camera is an array camera combined by a plurality of monochrome cameras.
Further, in the mura repairing method for the display panel, an included angle between an optical axis of at least one camera sensor and a lens in the array camera and a normal of the display panel is 2-20 degrees.
Furthermore, the mura repairing method of the display panel,
and illuminating different sub-pixel points of the display panel at intervals under high gray scale to obtain a diffusion function PSF of each sub-pixel point to an adjacent camera pixel, and correcting the first gray image and/or the acquired image of the monochromatic picture through the PSF.
Further, according to the mura repairing method for the display panel, the interval lighting is one or more interval sub-pixel points, and the range of the spreading function PSF includes one or more interval unlighted sub-pixel points near the display screen lighting pixel point shot by the camera.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) according to the mura repairing method for the display panel, the monochrome camera is used for shooting the white picture displayed by the display panel after the sub-pixels of all colors are lightened simultaneously, so that the first gray image with high resolution is obtained, and the technical problem of crosstalk is solved to a certain extent; the positions of the sub-pixels of all colors in the first gray scale image are identified and separated through a single-color picture, and the brightness information corresponding to the sub-pixels of all colors can be obtained by combining the brightness data extracted from the first gray scale image. Therefore, the non-uniformity detection, analysis and compensation can be respectively carried out on each color sub-pixel according to the traditional demura method. By the method, the brightness information corresponding to each sub-pixel is obtained under the condition of meeting the requirement of high resolution, so that the uniformity of a white picture for simultaneously lightening each sub-pixel is conveniently adjusted, and the adjustment precision is improved.
(2) According to the mura repairing method of the display panel, the monochrome camera is adopted for image acquisition, and compared with the method that the color camera with the color filter is used for separating the sub-pixels with different colors, the method is more suitable for the display with different sub-pixel alignment modes, and the color filter with a specific alignment mode does not need to be considered; the problem that the wavelength or energy loss of light passing through the color filter is not inconsistent is solved, and the calibration process is simplified; and additional hardware such as a color filter control unit is not required to be added, so that the hardware cost is lower and the test time is shorter.
(3) According to the invention, the pixel size of the monochrome camera is not larger than the distance between the image points of the display screen, so that the problem of pixel point crosstalk can be completely avoided.
(4) According to the mura repairing method of the display panel, the gray values of the sub-pixels with different colors in the pixel overlapping area are corrected through the diffusion function PSF, so that the pixel crosstalk of a camera is eliminated, the brightness deviation caused by the overlapping of the adjacent sub-pixels is avoided, and the precision of brightness and chromaticity adjustment is effectively improved.
Drawings
FIG. 1 is a schematic flow chart of a mura repairing method of a display panel according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a comparison between a camera pixel size and a sub-pixel of a display panel of a monochrome camera according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an arrangement of a camera array composed of monochrome cameras according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a flowchart of a mura repairing method for a display panel provided in this embodiment, and referring to fig. 1, the compensation method includes the following steps:
s1, acquiring a first gray image of a white picture displayed by the display panel after simultaneously lightening all sub-pixels by using the monochrome camera;
in this embodiment, the display panel includes an RGB panel and an RGBX panel, and each pixel point in the RGB panel includes a group of red, blue and green sub-pixels, which are in a three-primary color mode; the RGBX panel is additionally provided with a sub-pixel besides RGB, wherein X can be one of RGB sub-pixels or a white sub-pixel and is designed for a four-color pixel; simultaneously lightening sub-pixels of various colors in the display panel to enable the display panel to display a white picture, and then acquiring brightness data and chrominance data of the sub-pixels under the white picture by using a monochrome camera, wherein the monochrome camera can be a black-and-white camera; it should be noted that the white frames described in this embodiment include not only the standard white frames, but also all the white or unsaturated frames displayed when the sub-pixels of each color are simultaneously turned on at different gray-scale values.
Further, a high-resolution monochrome camera is adopted for collecting white pictures, and the monochrome camera can sense display pictures with different colors; one or more white pictures of the display panel are shot through a monochrome camera to obtain a corresponding first gray image.
In order to prevent crosstalk of camera pixels from influencing imaging, the accuracy of brightness detection is reduced; the present embodiment puts requirements on the resolution of the camera, and as shown in fig. 2, the size of the camera pixel of the monochrome camera is not larger than the distance between the image points of the display screen, so that it can be ensured that all the camera pixels have no crosstalk or crosstalk is reduced as much as possible. For example, a 4x4 mapping or an 8x8 mapping is used for each sub-pixel on the display panel to address the crosstalk problem.
In practical applications, a single monochrome camera may not satisfy the resolution requirement, and for this reason, the present embodiment uses an array camera combined by a plurality of monochrome cameras to acquire the first to fourth grayscale images of the display panel. For example: assuming that each sub-pixel on the display panel uses a 4x4 mapping, for a display screen with a resolution of 4M, RGB three sub-pixel structure, the resolution of a monochrome camera is required to meet 200M monochrome. None of the currently available cameras can meet this requirement, but a 2x1 camera array can be used, whose resolution is more than sufficient to meet the above resolution, as shown in fig. 3.
When a plurality of monochromatic cameras are used for forming a camera array to shoot pictures of a display panel, if the screen of the display panel is small, mechanical interference can occur between adjacent cameras, and therefore the mechanical interference is solved by adopting a mode of inclining the cameras; in particular, at least one monochrome camera in the camera array may be positioned at an angle in the range of 2-20 degrees from the normal to the display panel, i.e. the optical axes of the camera sensor and lens of the monochrome camera are at an angle of 2-20 degrees to the normal to the display panel.
S2, positioning the sub-pixels to obtain the position information of each sub-pixel;
in this step, R, G, B (and X) sub-pixels on the display panel need to be located so as to obtain the brightness of each sub-pixel.
In an optional embodiment, position location is performed by collecting a single-color picture corresponding to each color sub-pixel; specifically, the method comprises the following steps:
at least lightening one single-color picture of the display panel, and acquiring a corresponding single-color picture by using the single-color camera;
carrying out binarization processing on the acquired image of the monochromatic picture to generate a position mask;
the positions of the sub-pixels of each color are identified from the first gray scale image using a position mask.
Specifically, since the three sub-pixels have different shapes and sizes and have a certain arrangement rule, the position mask can be used to identify the specific position of one pixel, and then the positions of the rest pixels can be inferred according to the sizes or the arrangement rules of the rest pixels and the pixel, so as to realize the specific positioning of each sub-pixel. For example, taking the display panel as an RGB panel as an example, all R pixels on the display panel are lit to obtain a second grayscale image, then the second grayscale image is subjected to binarization processing to obtain a position mask of the corresponding R pixel, and based on the position mask, the specific position of the R pixel is located. Then, the positions of the remaining two pixels can be identified based on the positional relationship of the line bundle arrangement or the pixel size, for example, a pixel larger than the R pixel is a B pixel, and a pixel smaller than the R pixel is a G pixel; or, the pixels adjacent to two sides of the R pixel are B pixels, and the rest are G pixels.
In another alternative embodiment, the display screens of the respective color pixels are lit individually, and then binarized separately, followed by pixel positioning using the respective position masks.
Specifically, taking the display panel as an RGB panel as an example: lightening all R pixels on the display panel to obtain a second gray image; lightening all G pixels of the display panel to obtain a third gray image; lightening all B pixels of the display panel to obtain a fourth gray image; respectively carrying out binarization processing on the second gray level image, the third gray level image and the fourth gray level image to generate position masks; the position of the corresponding single-color sub-pixel is identified from the first gray scale image according to the position mask.
Specifically, the red sub-pixel, the blue sub-pixel and the green sub-pixel of the display panel are independently lightened, so that the display panel correspondingly displays a red picture, a blue picture and a green picture; respectively shooting a red picture, a blue picture and a green picture presented by a display panel by adopting a monochrome (black-and-white) camera to obtain corresponding gray images; it should be noted that, when a white picture and each monochromatic picture are shot, the spatial position relationship (such as height, angle, etc.) between the monochromatic camera and the display panel must be kept consistent; in this embodiment, the gray scale value of each monochrome picture is not specifically limited, and for each monochrome picture, multiple monochrome pictures under different gray scales can be collected.
Then, respectively carrying out binarization processing on the acquired images of the red picture, the blue picture and the green picture to generate corresponding position masks; the positions of the sub-pixels of each color are identified from the first gray scale image using a position mask.
Specifically, in the second gray scale image corresponding to the obtained display panel when the display panel displays the red image, the display brightness values of the blue sub-pixel and the green sub-pixel are both 0; therefore, the position and distribution of each red sub-pixel in the display panel can be known from the corresponding second gray scale image in the red screen, and the red sub-pixel position is identified from the first gray scale image corresponding to the white screen acquired in step S1 by using the second gray scale image corresponding to the red screen as a position mask. Similarly, based on the third and fourth gray scale images corresponding to the blue and green sub-pixels, the positions corresponding to the blue and green sub-pixels can be identified and selected from the first gray scale image corresponding to the white screen.
In a specific example, selecting appropriate threshold values to perform binarization processing on digital images corresponding to a red picture, a blue picture and a green picture respectively to obtain corresponding binary masks; and respectively identifying the positions of the red sub-pixel, the blue sub-pixel and the green sub-pixel from the white picture by adopting a dot product algorithm according to the binary mask corresponding to each single-color picture.
In the embodiment, the position distribution mode of each color sub-pixel in the display panel is easily identified by using the position mask obtained based on the single-color picture of the display panel.
In another alternative embodiment, the position information of each sub-pixel is determined from the first gray scale image by a pattern recognition algorithm;
specifically, the size and shape information of each sub-pixel is identified from the first gray scale image based on a pattern identification algorithm, and the position information of each sub-pixel is determined according to the size and shape information of each sub-pixel.
S3 identifying the brightness data of each color sub-pixel of the display panel from the first gray scale image according to the position information;
after obtaining the position information of each color sub-pixel, the image processing technology is used to respectively identify the brightness and/or chromaticity data of each color sub-pixel of the display panel from the first gray scale image.
In an optional implementation manner, in order to further eliminate the influence of crosstalk of the camera pixel, the mura repairing method for the display panel further includes a step of correcting the obtained luminance data of each color sub-pixel of the display panel.
In this embodiment, it is assumed that crosstalk that each lighted pixel on the display panel affects a pixel of an adjacent camera is caused by scattering, chromatic aberration, diffraction, and the like of a lens, and a contribution ratio of each pixel to crosstalk is fixed and is unrelated to a gray scale value of an image acquired by a monochrome camera.
Preferably, when the high gray scale is displayed, the interaction between adjacent pixel points, such as neighbor interaction caused by leakage current, is not obvious, and the time required for signal acquisition is short when the high gray scale is displayed, so that the contribution ratio of each pixel point to crosstalk is determined by measuring a high gray scale picture of the display panel, and then the contribution ratio is applied to the brightness correction of the low gray scale picture; under high gray scale, the interaction of the neighboring sub-pixel points can be ignored. The threshold of the high and low gray levels generally varies with the design and process of different display panels, for example: for a certain mobile phone screen, the threshold value is approximately in a gray scale value of 32; of course, any gray scale display frame can be used to determine the contribution ratio of each pixel point to crosstalk.
Specifically, different sub-pixel points of the display panel are lighted at intervals under high gray scale to obtain a diffusion function PSF of each sub-pixel point to an adjacent camera pixel, and the brightness data of each sub-pixel identified from the first gray scale image is corrected through the diffusion function PSF. The interval lighting is one sub-pixel or a plurality of sub-pixels, and the interval lighting modes of the sub-pixels are different based on different pixel arrangement modes of the display panel; the range of the spreading function PSF includes one or more sub-pixel points which are not lighted at intervals near the lighted pixel point of the display screen shot by the camera.
In an alternative embodiment, the lighting different sub-pixel points of the display panel at intervals under a high gray scale to obtain the PSF of each sub-pixel point to the adjacent camera pixel includes:
respectively lightening a red sub-pixel and a blue sub-pixel on a display panel, acquiring a corresponding fifth gray scale picture by using a monochrome camera, detecting brightness data corresponding to the lightening pixel in the fifth gray scale picture, and obtaining a first diffusion function PSF of the red sub-pixel and the blue sub-pixel to an adjacent green sub-pixel based on the brightness data;
the method comprises the steps of lighting a green sub-pixel on a display panel, acquiring a corresponding sixth gray scale picture by using a monochrome camera, detecting brightness data corresponding to the lighting pixel in the sixth gray scale picture, and obtaining a second diffusion function PSF of the green sub-pixel to an adjacent red sub-pixel and a blue sub-pixel based on the brightness data;
combining the first diffusion function PSF and the second diffusion function PSF to obtain a diffusion function PSF of each sub-pixel point;
and correcting the brightness data of each color sub-pixel of the display panel identified from the first gray scale image by applying the diffusion function PSF to obtain corrected brightness data.
After performing PSF correction, under all gray scale conditions, the luminance data of the camera pixels in the first to fourth gray scale images that fall in the gap between adjacent sub-pixel points should be zero.
S4, performing mura repair on the display panel according to the brightness data/corrected brightness data of each color sub-pixel;
in the step, after position information of each color sub-pixel and corresponding brightness data are obtained, brightness and chromaticity compensation are carried out on each color sub-pixel in the display panel by adopting a Demura algorithm;
for example: firstly, selecting a plurality of red sub-pixel points in the central area of a display panel and calculating a brightness mean value to obtain a target brightness value; selecting the brightness values of a plurality of red sub-pixel points in a central area with uniform brightness as a reference brightness, wherein the central area generally accounts for about 1/(500-600) of the whole display screen; and then calculating the difference between the brightness value of each red sub-pixel point and the target brightness value to obtain a Mura compensation value corresponding to the red sub-pixel. And calculating to obtain Mura compensation values corresponding to the blue sub-pixel and the green sub-pixel according to the same method.
According to the actual requirements of users, the white sub-pixel in the display panel can be individually compensated for brightness and chromaticity if necessary.
Optionally, after obtaining the luminance and/or chrominance compensation value of each monochrome sub-pixel, the method further includes: and feeding back the brightness and/or chromaticity compensation value to the display panel for brightness and/or chromaticity compensation.
Specifically, the Mura compensation values corresponding to the red sub-pixels, the blue sub-pixels and the green sub-pixels are fed back to the display panel, when the display panel displays an image, the corresponding Mura compensation values can be searched according to gray scale data or brightness data of the sub-pixels of each color in the image, and the sub-pixels of each color are compensated according to the Mura compensation values, so that the uneven brightness of the sub-pixels is improved, and the image display quality is improved.
The mura repairing method for the display panel is characterized in that a high-resolution monochromatic camera is used for shooting a white picture displayed by the display panel after the display panel simultaneously lights sub-pixels of various colors, the positions of the sub-pixels of various colors in the white picture are identified and separated through the monochromatic picture, and then the sub-pixels of various colors are respectively subjected to non-uniformity detection, analysis and compensation; the uniformity adjustment of white pictures for simultaneously lightening sub-pixels of all colors is realized, and the adjustment precision is improved; in addition, compared with the separation of different color sub-pixels by using a color camera with a color filter, the scheme is more suitable for the display with different sub-pixel alignment modes without considering the color filter with a specific alignment mode; the problem that the wavelength or energy loss of light passing through the color filter is not inconsistent is solved, and the calibration process is simplified; and additional hardware such as a color filter control unit is not required to be added, so that the hardware cost is lower and the test time is shorter.
The embodiment further provides an electronic device, which includes at least one processor and at least one memory, where the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the mura repairing method for the display panel, and the specific steps are not described herein again; in this embodiment, the types of the processor and the memory are not particularly limited, for example: the processor may be a microprocessor, digital information processor, on-chip programmable logic system, or the like; the memory may be volatile memory, non-volatile memory, a combination thereof, or the like.
Optionally, the electronic device further includes a monochrome camera or a camera array formed by a plurality of monochrome cameras; the monochrome camera is used for collecting white pictures displayed by the display panel after the display panel simultaneously lights the sub-pixels of all colors, displaying corresponding monochrome pictures (first to fourth gray level images) by the display panel after the display panel respectively lights the monochrome sub-pixels, sending the monochrome pictures to the processing unit, and executing mura restoration by the processing unit.
The electronic device may also communicate with one or more external devices (e.g., keyboard, pointing terminal, display, etc.), with one or more terminals that enable a user to interact with the electronic device, and/or with any terminals (e.g., network card, modem, etc.) that enable the electronic device to communicate with one or more other computing terminals. Such communication may be through an input/output (I/O) interface. Also, the electronic device may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public Network, such as the internet) via the Network adapter.
The present embodiment also provides a computer readable medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of the mura repair method described above. Types of computer readable media include, but are not limited to, storage media such as SD cards, usb disks, fixed hard disks, removable hard disks, and the like.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A mura repairing method of a display panel, comprising:
acquiring a first gray image of a white picture displayed by a display panel after all sub-pixels are simultaneously lightened by using a monochrome camera;
positioning the sub-pixels to obtain the position information of the sub-pixels of each color;
recognizing the brightness data of each color sub-pixel of the display panel from the first gray scale image according to the position information;
and performing mura repair on the display panel according to the brightness data of the sub-pixels of each color.
2. The mura repairing method of claim 1 wherein the positioning the sub-pixels to obtain the position information of each sub-pixel comprises:
at least lightening one single-color picture of the display panel, and acquiring a corresponding single-color picture by using the single-color camera;
carrying out binarization processing on the acquired image of the monochromatic picture to generate a position mask;
and identifying the positions of the sub-pixels of each color from the first gray scale image by using the position mask.
3. The mura repairing method of claim 2 wherein said illuminating at least one monochrome picture of said display panel, acquiring a corresponding monochrome picture with said monochrome camera, comprises:
lightening all R pixels of the display panel to obtain a second gray image;
lightening all G pixels of the display panel to obtain a third gray image;
lightening all B pixels of the display panel to obtain a fourth gray image;
respectively carrying out binarization processing on the second, third and fourth gray level images to generate position masks;
and identifying the position of the corresponding single-color sub-pixel from the first gray-scale image according to the position mask.
4. The mura repairing method of claim 1 wherein the positioning the sub-pixels to obtain the position information of each sub-pixel comprises:
and analyzing the first gray level image to obtain the position information of each color sub-pixel.
5. The mura repairing method of the display panel according to claim 4,
and obtaining the position information of each sub-pixel according to the size and shape information of each sub-pixel in the first gray level image.
6. The mura repairing method of the display panel according to any one of claims 1 to 5,
the pixel size of the monochrome camera is not larger than the distance between the image points of the display screen.
7. The mura repairing method of a display panel as claimed in claim 6, wherein said monochrome camera is an array camera combined by a plurality of monochrome cameras.
8. The mura repairing method of claim 7 wherein an angle between an optical axis of at least one of the camera sensor and the lens of the array camera and a normal of the display panel is from 2 ° to 20 °.
9. The mura repairing method of the display panel according to any one of claims 1 to 3,
and illuminating different sub-pixel points of the display panel at intervals under a gray scale to obtain a diffusion function PSF of each sub-pixel point to an adjacent camera pixel, and correcting the brightness data of the sub-pixels of each color identified from the first gray scale image through the PSF.
10. The mura repairing method of claim 9 wherein the interval lighting is one or more interval sub-pixels, and the range of the spreading function PSF is one or more interval non-lighting sub-pixels near a pixel on which the display panel is lighted photographed on the camera.
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