CN112071246B - Method and device for positioning sub-pixels of display panel and compensation method of display panel - Google Patents
Method and device for positioning sub-pixels of display panel and compensation method of display panel Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a device for positioning sub-pixels of a display panel and a compensation method of the display panel. The sub-pixel positioning method comprises the following steps: shooting a first display picture to obtain a first positioning image; the first color sub-pixels at a plurality of setting positions of the display panel in the first display picture emit light, and the first color sub-pixels at the plurality of setting positions are not adjacent; determining a first positioning starting point corresponding to the first color sub-pixel of each set position according to the display gray scale of the first positioning image; determining the image coordinate of the first color sub-pixel at each set position according to the display gray scale of the image point adjacent to the first positioning starting point; shooting a second display picture to obtain a second positioning image; all the first color sub-pixels of the second display picture emit light; and determining the image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position. The invention improves the positioning precision of the sub-pixels of the display panel and improves the compensation effect of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a method and a device for positioning sub-pixels of a display panel and a compensation method of the display panel.
Background
With the development of display technologies, people have higher and higher requirements on the display effect of a display panel, and before the display panel leaves a factory, the display brightness of sub-pixels in the display panel needs to be compensated. How to improve the positioning accuracy of the sub-pixel positioning method is the key of the compensation effect of the display panel.
Disclosure of Invention
The invention provides a method and a device for positioning sub-pixels of a display panel and a compensation method of the display panel, which are used for improving the positioning precision of the sub-pixels in the display panel and improving the compensation effect of the display panel.
In a first aspect, an embodiment of the present invention provides a method for positioning sub-pixels of a display panel, including:
shooting a first display picture of a display panel to obtain a first positioning image; the first color sub-pixels at a plurality of setting positions of the display panel in the first display picture emit light, and the first color sub-pixels at the plurality of setting positions are not adjacent;
determining a first positioning starting point corresponding to a first color sub-pixel of each set position according to the display gray scale of a plurality of image points in the first positioning image;
determining the image coordinate of the first color sub-pixel of each set position according to the display gray scale of a plurality of image points adjacent to the first positioning starting point;
shooting a second display picture of the display panel to obtain a second positioning image; wherein all the first color sub-pixels of the display panel in the second display frame emit light;
and determining the image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position.
Optionally, determining a first positioning starting point corresponding to the first color sub-pixel at each of the set positions according to the display gray scale of the plurality of image points in the first positioning image, includes:
determining a first image coordinate interval X of the first color sub-pixels adjacent in a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent in a second direction; wherein the first direction and the second direction are mutually crossed;
taking a plurality of image points with display gray scales larger than a first set threshold value in the first positioning image as first positioning starting points; the distance between the first positioning starting points adjacent to each other along the first direction is larger than 2X, and the distance between the second positioning starting points adjacent to each other along the second direction is larger than 2Y.
Optionally, determining the image coordinates of the first color sub-pixel at each of the set positions according to the display gray scales of the plurality of image points adjacent to the first positioning start point, includes:
taking the brightest image point of m × n image points adjacent to each other including the first positioning starting point as a coordinate center point, and taking the coordinates of p × q image points with the coordinate center point as the center as the image coordinates of the first color sub-pixel of the set position; wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q.
Optionally, determining image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position includes:
a1, determining a first image coordinate interval X of the first color sub-pixels adjacent along a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent along a second direction; wherein the first direction and the second direction are mutually crossed;
a2, determining the coordinate center point of the first color sub-pixel of each set position as a reference point;
a3, determining a plurality of first image points along a first direction, and determining a plurality of second image points along a second direction, wherein the distance between a first image point and the reference point along the first direction is a first image coordinate interval, and the distance between a second image point and the reference point along the second direction is a second image coordinate interval;
a4, determining the first image point and the second image point as a second positioning starting point;
a5, using the brightest image point of the m × n image points containing the second positioning starting point as a coordinate central point, and using the coordinates of p × q image points using the coordinate central point as a center as the image coordinates of the next first color sub-pixel, wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q;
and A6, determining the coordinate center point of the next first color sub-pixel as a reference point, and repeating the steps A3-A5 until the image coordinates of all first color sub-pixels are determined.
Optionally, the first color sub-pixels at the multiple setting positions are arranged at equal intervals in the display panel.
Optionally, a connecting line of the first color sub-pixels at the plurality of set positions along the first direction and a connecting line along the second direction equally divide the display panel into a plurality of regions, where the first direction and the second direction intersect with each other.
In a second aspect, an embodiment of the present invention further provides a sub-pixel positioning apparatus for a display panel, including:
the first image acquisition module is used for shooting a first display picture of the display panel to obtain a first positioning image; the first color sub-pixels at a plurality of setting positions of the display panel in the first display picture emit light, and the first color sub-pixels at the plurality of setting positions are not adjacent;
the first processing module is used for determining a first positioning starting point corresponding to the first color sub-pixel of each set position according to the display gray scale of a plurality of image points in the first positioning image;
the second processing module is used for determining the image coordinates of the first color sub-pixels at each set position according to the display gray scales of a plurality of image points adjacent to the first positioning starting point;
the second image acquisition module is used for shooting a second display picture of the display panel to obtain a second positioning image; wherein, all the first color sub-pixels of the display panel in the second display frame emit light;
and the third processing module is used for determining the image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position.
Optionally, the first processing module includes:
an interval determination unit for determining a first image coordinate interval X of the first color sub-pixels adjacent in a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent in a second direction; wherein the first direction and the second direction are mutually perpendicular and crossed;
the positioning unit is used for taking a plurality of image points with display gray scales larger than a first set threshold value in the first positioning image as a first positioning starting point; the distance between the first positioning starting points adjacent to each other along the first direction is larger than 2X, and the distance between the second positioning starting points adjacent to each other along the second direction is larger than 2Y.
Optionally, the second processing module is specifically configured to:
taking the brightest image point of m × n image points adjacent to each other including the first positioning starting point as a coordinate center point, and taking the coordinates of p × q image points with the coordinate center point as the center as the image coordinates of the first color sub-pixel of the set position; wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q.
In a third aspect, an embodiment of the present invention further provides a compensation method for a display panel, including:
the sub-pixel positioning method of the display panel according to any embodiment of the present invention is adopted to position the sub-pixel of each color in the display panel:
extracting the display brightness of each sub-pixel under the set display gray scale from the display image of the display panel according to the image coordinate of each sub-pixel;
and performing display compensation on the sub-pixels according to the display brightness.
The sub-pixel positioning method of the display panel obtains a first positioning image by shooting a first display picture which only emits light of a first color sub-pixel at a plurality of set positions, carries out coarse positioning according to the display gray scale of a plurality of image points in the first positioning image, determines a first positioning starting point corresponding to the first color sub-pixel at each set position, carries out fine positioning according to the display gray scale of a plurality of image points adjacent to the first positioning starting point, and determines the image coordinate of the first color sub-pixel at each set position; then shooting all second display pictures of the first color sub-pixels to obtain a second positioning image; and determining the image coordinates of all the first color sub-pixels according to the image coordinates of the first color sub-pixels at the set positions and the second positioning image. In the embodiment, the image coordinates of the plurality of first color sub-pixels at the set position are determined firstly, and because the first color sub-pixels at the set position are not adjacent, the first color sub-pixels in the first positioning image are represented as a plurality of independent image point clusters, and the light-emitting boundary of each first color sub-pixel is more definite, so that the image coordinates of the first color sub-pixels determined by the image point clusters are more accurate, and the image coordinates of other first color sub-pixels are more accurate when the first color sub-pixels at the set position are used as a reference, thereby improving the positioning accuracy of the sub-pixels and improving the compensation effect of the display panel.
Drawings
FIG. 1 is a flowchart illustrating a method for positioning sub-pixels of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first positioning image provided in this embodiment;
FIG. 3 is a schematic diagram of a sub-pixel positioning device of a display panel according to this embodiment;
fig. 4 is a flowchart of a compensation method of a display panel according to this embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background, it is generally necessary to compensate the display brightness of sub-pixels in a display panel before the display panel leaves the factory, for example, to compensate the display uniformity when the display panel has display non-uniformity. In the existing display panel compensation technology, optical imaging acquisition needs to be performed on a display panel in a display state, and algorithm processing is performed on an image, wherein the processing mainly comprises sub-pixel extraction, brightness conversion, compensation and the like. The first step of the compensation technology is sub-pixel extraction, and the step of searching and accurately positioning the positions of all sub-pixels in the display panel in the extraction process is the first step of sub-pixel extraction.
Based on the above problem, the present embodiment provides a method for positioning sub-pixels of a display panel, and fig. 1 is a flowchart of the method for positioning sub-pixels of a display panel provided in the present embodiment, and with reference to fig. 1, the method includes:
s110, shooting a first display picture of a display panel to obtain a first positioning image; the first color sub-pixels at a plurality of setting positions of the display panel in the first display picture emit light, and the first color sub-pixels at the plurality of setting positions are not adjacent.
The first color sub-pixel may be a sub-pixel of any color in the display panel, and may be, for example, a red sub-pixel, a green sub-pixel, or a blue sub-pixel. The set position may be any position in the display panel. The first color sub-pixel at the set position can be driven to emit light by inputting a driving signal to the display panel, so that the first display picture is displayed. A first display screen of the display panel is photographed by an image capturing device, such as a camera, to obtain a first positioning image.
S120, determining a first positioning starting point corresponding to the first color sub-pixel at each set position according to the display gray scale of a plurality of image points in the first positioning image.
In particular, the resolution of the image capture device is typically greater than the resolution of the display panel, so that each sub-pixel in the display panel occupies more than one image point in the image captured by the image capture device. Fig. 2 is a schematic diagram of a first positioning image provided in this embodiment, and referring to fig. 2, each first color sub-pixel corresponds to a cluster of image points in the first positioning image, for example, corresponds to 3 × 3 image point clusters. Therefore, the first color sub-pixel of each set position is represented in the first positioning image as an image point cluster with the display gray scale larger than the first set threshold value. The first positioning starting point is any point in the image point cluster of which the display gray scale corresponding to the first color sub-pixel at each set position is greater than the first set threshold value.
The display gray scale of each image point can be compared with a first set threshold value from the coordinate origin of the first positioning image, the first image point with the display gray scale larger than the first set threshold value is determined as the first positioning starting point of the first color sub-pixel of the first set position, the image point meeting the image interval is determined as the first positioning starting point of the first color sub-pixel of the next set position from the first positioning starting point according to the image interval between the first color sub-pixel of the next set position and the first color sub-pixel of the first set position, and the first positioning starting point of the first color sub-pixel of the set position of other positions is determined according to the image interval between the first color sub-pixels of other set positions.
S130, determining the image coordinate of the first color sub-pixel at each set position according to the display gray scale of a plurality of image points adjacent to the first positioning starting point.
For example, the display gray scale of the plurality of image points centered on the first positioning start point may be compared with a set threshold, and the image coordinates of the plurality of image points having the display gray scale greater than the set threshold may be used as the image coordinates of the first color sub-pixel of the setting position.
S140, shooting a second display picture of the display panel to obtain a second positioning image; and all the first color sub-pixels of the display panel in the second display picture emit light.
The luminance of the first color sub-pixel in the second display frame may be the same as or different from the luminance of the first color sub-pixel in the first display frame, and this embodiment is not limited in particular.
S150, determining the image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set positions.
Specifically, the first color sub-pixel at the set position may be found in the second positioning image according to the image coordinate of the first color sub-pixel at the set position, the first color sub-pixel at the set position is used as a reference, the searching is performed gradually in each direction, a plurality of image points with adjacent display gray scales larger than a set threshold are found, and the image coordinate of the first color sub-pixel adjacent to the first color sub-pixel at the set position is determined according to the plurality of image points. For example, the point of the plurality of image points with the largest display gray scale may be taken as the center, and the image coordinates corresponding to the plurality of image points surrounding the center may be taken as the image coordinates of the first color sub-pixel. And then, gradually searching in each direction by taking the newly determined first color sub-pixel as a reference, finding a plurality of image points with adjacent display gray scales larger than a set threshold, determining the image coordinates of the first color sub-pixel according to the plurality of image points, and so on until the image coordinates of all the first color sub-pixels are determined.
The sub-pixel positioning method of the display panel provided in this embodiment obtains a first positioning image by capturing a first display image in which only a first color sub-pixel at a plurality of setting positions emits light, performs coarse positioning according to display gray scales of a plurality of image points in the first positioning image, determines a first positioning starting point corresponding to the first color sub-pixel at each setting position, performs fine positioning according to display gray scales of a plurality of image points adjacent to the first positioning starting point, and determines an image coordinate of the first color sub-pixel at each setting position; then shooting all second display pictures with the first color sub-pixels to obtain a second positioning image; and determining the image coordinates of all the first color sub-pixels according to the image coordinates of the first color sub-pixels at the set positions and the second positioning image. In the embodiment, the image coordinates of the plurality of first color sub-pixels at the set position are determined firstly, and because the first color sub-pixels at the set position are not adjacent, the first color sub-pixels in the first positioning image are represented as a plurality of independent image point clusters, and the light-emitting boundary of each first color sub-pixel is more definite, so that the image coordinates of the first color sub-pixels determined by the image point clusters are more accurate, and the image coordinates of other first color sub-pixels are more accurate when the first color sub-pixels at the set position are used as a reference, thereby improving the positioning accuracy of the sub-pixels and improving the compensation effect of the display panel.
Optionally, determining a first positioning starting point corresponding to the first color sub-pixel at each set position according to the display gray scale of the plurality of image points in the first positioning image, includes:
determining a first image coordinate interval X of first color sub-pixels adjacent along a first direction and a second image coordinate interval Y of first color sub-pixels adjacent along a second direction; wherein the first direction and the second direction are mutually perpendicular and crossed;
taking a plurality of image points with display gray scales larger than a first set threshold value in the first positioning image as first positioning starting points; the distance between the first positioning starting points adjacent to each other along the first direction is larger than 2X, and the distance between the second positioning starting points adjacent to each other along the second direction is larger than 2Y.
Specifically, if the number of the first color sub-pixels arranged in the display panel is a × b, and the image point occupied in the first positioning image is n × m, the first image coordinate interval X = n/a, and the second image coordinate interval Y = m/b. Since the first color sub-pixels of the two adjacent set positions are not adjacent in the display panel, in the first positioning image, the pitch of the light-emitting first color sub-pixels adjacent in the first direction is greater than or equal to 2X, and the pitch of the light-emitting first color sub-pixels adjacent in the second direction Y is greater than or equal to 2Y.
Referring to fig. 2, the display gray scale of each image point from the origin of coordinates of the first positioning image may be compared with a first set threshold, the image point having the first display gray scale greater than the first set threshold is used as a first starting point 101, then the image points around the first starting point 101 are compared in the first direction S1 (the second direction S2) with reference to the first starting point 101, the image point having the display gray scale greater than the first set threshold and having a distance greater than or equal to 2X (2Y) from the first starting point 101 is determined as a second starting point 102, then the second starting point 102 is used as a reference to continue to search for a third starting point 103 \8230, the pth starting point is found, and the first starting point 101, the second starting point 102, the third starting point 103 \8230, the first starting point 8230, and the second starting point are determined as the first positioning starting point.
Optionally, determining the image coordinates of the first color sub-pixel at each set position according to the display gray scale of the plurality of image points adjacent to the first positioning start point, includes:
using the brightest image point in m × n image points adjacent to each other including the first positioning starting point as a coordinate central point, and using the coordinates of p × q image points with the coordinate central point as the center as the image coordinates of the first color sub-pixel at the set position; wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q.
Where p is the number of image points occupied by a first color sub-pixel along the first direction, and q is the number of image points occupied by a first color sub-pixel along the second direction. And setting m to be larger than p and n to be larger than q, so that when the first positioning starting point is located at the edge position of the image point cluster corresponding to the first color sub-pixel unit, m x n image points adjacent to the first positioning starting point include all the image point clusters corresponding to the first color sub-pixel, and the coordinate central point determined by the brightest image point in the m x n image points is the central point of the first color sub-pixel, so that the positioning accuracy is improved. For example, taking the first positioning starting point 101 as an example, the display gray scales of all 25 image points of the 5 × 5 image point matrix enclosed by taking the first positioning starting point 101 as the center may be obtained, and the coordinate center point of the first color positioning sub-pixel, which is the image point with the highest display gray scale, is taken as the set position.
In the embodiment, firstly, m × n image points are preliminarily defined by the first locating point, the highest point of the display gray scale in the m × n image points is used as the imaging coordinate center point of the first color sub-pixel, and then a p × q matrix is defined by taking the coordinate center point as the final precise locating point, so that the locating precision is improved.
Optionally, determining image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position includes:
a1, determining a first image coordinate interval X of first color sub-pixels adjacent along a first direction and a second image coordinate interval Y of first color sub-pixels adjacent along a second direction; wherein the first direction and the second direction cross each other.
And A2, determining the coordinate center point of the first color sub-pixel of each set position as a reference point.
And A3, determining a plurality of first image points along a first direction, and determining a plurality of second image points along a second direction, wherein the distance between the first image points and the reference points along the first direction is a first image coordinate interval, and the distance between the second image points and the reference points along the second direction is a second image coordinate interval.
And A4, determining the first image point and the second image point as a second positioning starting point.
And A5, taking the brightest image point of the m × n image points containing the second positioning starting point as a coordinate center point, and taking the coordinates of p × q image points taking the coordinate center point as the center as the image coordinates of the next first color sub-pixel, wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q.
And A6, determining the center of the next first color sub-pixel as a reference point, and repeating the steps A3-A5 until the image coordinates of all the first color sub-pixels are determined.
Specifically, the coordinate center point of the first color sub-pixel at each known position is used as a reference point, searching is performed outwards along various directions to determine a plurality of first image points and a plurality of second image points, the distance between the first image points and the reference point is a first image coordinate interval, the distance between the second image points and the reference point is a second image coordinate interval, if the second positioning image has no skew or deviation, the first image points and the second image points are the center points of the first color sub-pixels adjacent to the first color sub-pixel at the known position, and when the second positioning image has deviation, the first image points and the second image points may deviate from the center points of the first color sub-pixels adjacent to the first color sub-pixel at the known position. By taking the brightest image point of the m × n image points including the second positioning starting point as the coordinate center point, the positioning error caused by image skew or deviation can be avoided, and the coordinate center point is ensured to be the actual center position of the first color sub-pixel, so that the p × q image points taking the coordinate center point as the center are ensured to be the image point cluster actually corresponding to the first color sub-pixel, and the first color sub-pixel is ensured to have higher positioning accuracy.
In addition, in the embodiment, the first color sub-pixel with the determined position is used for outward expanding search to locate the nearest adjacent first color sub-pixel, so that the search distance is minimized, and the positioning deviation caused by the imaging visual field and the slope of the screen body is offset. The searching calculation and the positioning action are executed in parallel by utilizing a plurality of first color sub-pixels with determined positions, so that the positioning efficiency can be improved. And the first color sub-pixel of each newly determined position is taken as a new reference point to determine the image coordinate of the next first color sub-pixel, so that error accumulation can be avoided.
Optionally, the first color sub-pixels at the plurality of set positions are arranged at equal intervals in the display panel.
Specifically, after the first positioning start point of the first color sub-pixel at one setting position is determined, when the first positioning start point of the first color sub-pixel at the next setting position is searched according to the image interval between the first color sub-pixel at the next setting position and the first color sub-pixel at the last setting position, the search distances of the first color sub-pixels at the respective setting positions are close, so that the search time can be shortened, and the positioning efficiency can be improved.
Optionally, a connecting line of the first color sub-pixels at the plurality of set positions along the first direction and a connecting line of the first color sub-pixels along the second direction equally divide the display panel into a plurality of regions, where the first direction and the second direction intersect with each other.
By means of the arrangement, when the first color sub-pixels at the set positions are used as reference points to search outwards in parallel, the outwards searching distances of the first color sub-pixels at each set position are the same, the searching distance is minimized, positioning deviation caused by imaging visual fields and the slope of the screen body is offset, and positioning accuracy is further improved.
Fig. 3 is a schematic diagram of the sub-pixel positioning apparatus of a display panel provided in this embodiment, and referring to fig. 3, the apparatus includes:
a first image obtaining module 210, configured to shoot a first display picture of the display panel to obtain a first positioning image; the first color sub-pixels at a plurality of setting positions of the display panel in the first display picture emit light, and the first color sub-pixels at the plurality of setting positions are not adjacent.
The first processing module 220 is configured to determine a first positioning starting point corresponding to the first color sub-pixel at each of the set positions according to display gray scales of a plurality of image points in the first positioning image.
The second processing module 230 is configured to determine the image coordinates of the first color sub-pixel at each of the set positions according to the display gray scales of the plurality of image points adjacent to the first positioning start point.
The second image obtaining module 240 is configured to capture a second display image of the display panel to obtain a second positioning image; and all the first color sub-pixels of the display panel in the second display picture emit light.
And a third processing module 250, configured to determine image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position.
Optionally, the first processing module 220 includes:
an interval determination unit for determining a first image coordinate interval X of the first color sub-pixels adjacent in a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent in a second direction; wherein the first direction and the second direction are mutually crossed;
the positioning unit is used for taking a plurality of image points with display gray scales larger than a first set threshold value in the first positioning image as a first positioning starting point; the distance between the first positioning starting points adjacent to each other along the first direction is larger than 2X, and the distance between the second positioning starting points adjacent to each other along the second direction is larger than 2Y.
Optionally, the second processing module 230 is specifically configured to:
taking the brightest image point of m × n image points adjacent to each other containing the first positioning starting point as a coordinate central point, and taking the coordinates of p × q image points taking the coordinate central point as the center as the image coordinates of the first color sub-pixel; wherein m, n, p and q are all positive integers greater than 1, m is greater than p, and n is greater than q.
Optionally, the third processing module 250 is specifically configured to:
a1, determining a first image coordinate interval X of the first color sub-pixels adjacent along a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent along a second direction; wherein the first direction and the second direction are mutually crossed;
a2, determining the coordinate center point of the first color sub-pixel of each set position as a reference point;
a3, determining a plurality of first image points along a first direction, and determining a plurality of second image points along a second direction, wherein the distance between a first image point and the reference point along the first direction is a first image coordinate interval, and the distance between a second image point and the reference point along the second direction is a second image coordinate interval;
a4, determining the first image point and the second image point as a second positioning starting point;
a5, using the brightest image point of the m × n image points containing the second positioning starting point as a coordinate center point, and using the coordinates of p × q image points taking the coordinate center point as the center as the image coordinates of the next first color sub-pixel, wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q;
and A6, determining a reference point from the coordinate center point of the next first color sub-pixel, and repeating the steps A3-A5 until the image coordinates of all the first color sub-pixels are determined.
Optionally, the first color sub-pixels at the plurality of set positions are arranged at equal intervals in the display panel.
Optionally, a connecting line of the first color sub-pixels at the plurality of set positions along the first direction and a connecting line along the second direction equally divide the display panel into a plurality of regions, wherein the first direction and the second direction intersect with each other.
The sub-pixel positioning device of the display panel provided by the embodiment and the sub-pixel positioning method of the display panel provided by any embodiment of the invention belong to the same inventive concept, and have corresponding beneficial effects, and the technical details provided in the embodiment are not referred to the sub-pixel positioning method of the display panel provided by any embodiment of the invention.
Fig. 4 is a flowchart of a compensation method for a display panel provided in this embodiment, and referring to fig. 4, the method includes:
s310, positioning the sub-pixel of each color in the display panel by adopting the sub-pixel positioning method of the display panel of any embodiment of the invention.
And S320, extracting the display brightness of each sub-pixel under the set display gray scale from the display image of the display panel according to the image coordinate of each sub-pixel.
And S330, performing display compensation on the sub-pixels according to the display brightness.
The sub-pixel positioning method of the display panel provided by the embodiment has higher positioning accuracy, so that the accuracy of extracting the display brightness of the sub-pixel is higher, and the display compensation accuracy of the sub-pixel is further improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (5)
1. A method for positioning sub-pixels of a display panel, comprising:
shooting a first display picture of a display panel to obtain a first positioning image; the first color sub-pixels at a plurality of setting positions of the display panel in the first display picture emit light, and the first color sub-pixels at the plurality of setting positions are not adjacent;
determining a first positioning starting point corresponding to a first color sub-pixel of each set position according to the display gray scale of a plurality of image points in the first positioning image;
determining the image coordinate of the first color sub-pixel of each set position according to the display gray scale of a plurality of image points adjacent to the first positioning starting point;
shooting a second display picture of the display panel to obtain a second positioning image; wherein all the first color sub-pixels of the display panel in the second display frame emit light;
determining image coordinates of all first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position;
the determining a first positioning starting point corresponding to the first color sub-pixel of each set position according to the display gray scale of a plurality of image points in the first positioning image includes:
determining a first image coordinate interval X of the first color sub-pixels adjacent in a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent in a second direction; wherein the first direction and the second direction are mutually crossed;
taking a plurality of image points with display gray scales larger than a first set threshold value in the first positioning image as first positioning starting points; the distance between the first positioning starting points adjacent to each other along the first direction is greater than 2X, and the distance between the second positioning starting points adjacent to each other along the second direction is greater than 2Y;
the determining the image coordinates of the first color sub-pixel of each setting position according to the display gray scale of a plurality of image points adjacent to the first positioning starting point comprises:
taking the brightest image point of m × n image points adjacent to each other including the first positioning starting point as a coordinate center point, and taking the coordinates of p × q image points with the coordinate center point as the center as the image coordinates of the first color sub-pixel of the set position; wherein m, n, p and q are positive integers more than 1, m is more than p, and n is more than q;
the determining the image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position includes:
a1, determining a first image coordinate interval X of the first color sub-pixels adjacent along a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent along a second direction; wherein the first direction and the second direction are mutually crossed;
a2, determining the coordinate center point of the first color sub-pixel of each set position as a reference point;
a3, determining a plurality of first image points along a first direction, and determining a plurality of second image points along a second direction, wherein the distance between a first image point and the reference point along the first direction is a first image coordinate interval, and the distance between a second image point and the reference point along the second direction is a second image coordinate interval;
a4, determining the first image point and the second image point as a second positioning starting point;
a5, using the brightest image point of the m × n image points containing the second positioning starting point as a coordinate central point, and using the coordinates of p × q image points using the coordinate central point as a center as the image coordinates of the next first color sub-pixel, wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q;
and A6, determining the coordinate center point of the next first color sub-pixel as a reference point, and repeating the steps A3-A5 until the image coordinates of all the first color sub-pixels are determined.
2. The method of claim 1, wherein:
the first color sub-pixels of the plurality of setting positions are arranged at equal intervals in the display panel.
3. The method of claim 1, wherein:
the display panel is equally divided into a plurality of areas by the connecting line of the first color sub-pixels at the plurality of set positions along the first direction and the connecting line along the second direction, wherein the first direction and the second direction are mutually crossed.
4. A sub-pixel positioning apparatus for a display panel, comprising:
the first image acquisition module is used for shooting a first display picture of the display panel to obtain a first positioning image; the first color sub-pixels at a plurality of setting positions of the display panel in the first display picture emit light, and the first color sub-pixels at the plurality of setting positions are not adjacent;
the first processing module is used for determining a first positioning starting point corresponding to the first color sub-pixel of each set position according to the display gray scale of a plurality of image points in the first positioning image;
the second processing module is used for determining the image coordinates of the first color sub-pixels at each set position according to the display gray scales of a plurality of image points adjacent to the first positioning starting point;
the second image acquisition module is used for shooting a second display picture of the display panel to obtain a second positioning image; wherein, all the first color sub-pixels of the display panel in the second display frame emit light;
the third processing module is used for determining the image coordinates of all the first color sub-pixels according to the second positioning image and the image coordinates of the first color sub-pixels at the set position;
the first processing module comprises:
an interval determination unit for determining a first image coordinate interval X of the first color sub-pixels adjacent in a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent in a second direction; wherein the first direction and the second direction are mutually crossed;
the positioning unit is used for taking a plurality of image points with display gray scales larger than a first set threshold value in the first positioning image as a first positioning starting point; the distance between the first positioning starting points adjacent to each other along the first direction is greater than 2X, and the distance between the second positioning starting points adjacent to each other along the second direction is greater than 2Y;
the second processing module is specifically configured to:
taking the brightest image point of m × n adjacent image points containing the first positioning starting point as a coordinate central point, and taking the coordinates of p × q image points taking the coordinate central point as the center as the image coordinates of the first color sub-pixel; wherein m, n, p and q are positive integers more than 1, m is more than p, and n is more than q;
the third processing module is specifically configured to:
a1, determining a first image coordinate interval X of the first color sub-pixels adjacent along a first direction and a second image coordinate interval Y of the first color sub-pixels adjacent along a second direction; wherein the first direction and the second direction are mutually crossed;
a2, determining the coordinate center point of the first color sub-pixel of each set position as a reference point;
a3, determining a plurality of first image points along a first direction, and determining a plurality of second image points along a second direction, wherein the distance between a first image point and the reference point along the first direction is a first image coordinate interval, and the distance between a second image point and the reference point along the second direction is a second image coordinate interval;
a4, determining the first image point and the second image point as a second positioning starting point;
a5, using the brightest image point of the m × n image points containing the second positioning starting point as a coordinate central point, and using the coordinates of p × q image points using the coordinate central point as a center as the image coordinates of the next first color sub-pixel, wherein m, n, p and q are positive integers greater than 1, m is greater than p, and n is greater than q;
and A6, determining a reference point from the coordinate center point of the next first color sub-pixel, and repeating the steps A3-A5 until the image coordinates of all the first color sub-pixels are determined.
5. A compensation method for a display panel, comprising:
positioning the sub-pixels of each color in the display panel by using the sub-pixel positioning method of the display panel according to any one of claims 1 to 3:
extracting the display brightness of each sub-pixel under the set display gray scale from the display image of the display panel according to the image coordinate of each sub-pixel;
and performing display compensation on the sub-pixels according to the display brightness.
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| CN114495803A (en) * | 2022-03-31 | 2022-05-13 | 武汉精立电子技术有限公司 | Mura repairing method of display panel |
| CN116913197B (en) * | 2023-09-15 | 2024-01-16 | 武汉精立电子技术有限公司 | Pixel positioning method, pixel brightness extraction method and system |
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