Photograph positioning method and device of display panel

Abstract

Embodiments of the present application disclose a photographing positioning method and device of a display panel, the method comprising: displaying a preset positioning picture on the display panel, so that when the display panel displays the preset positioning picture, the display gray scale corresponding to the multiple columns of sub-pixels that are lighted in the curved area of the display panel gradually changes according to a preset gradient mode from the edge of the curved area close to the center of the display panel to the edge far from the center of the display panel; the brightness data of the sub-pixels at different positions corresponding to the same gray scale is relatively small or consistent when a camera captures the preset positioning picture displayed by the display panel. Then, the display panel displaying the preset positioning picture is captured to determine the positions of the sub-pixels in the display panel according to the captured image, so that the accuracy of the determination of the positions of the sub-pixels in the display panel according to the preset positioning picture is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, in particular to a photograph positioning method and device of a display panel. BACKGROUND

[0002] With the development of display technology, users have higher and higher requirements for display picture quality.

[0003] In the prior art, demura has become an indispensable step before the display panel is shipped, wherein the demura is based on the compensation data obtained from the luminance data obtained by shooting with a high-resolution industrial camera to perform compensation. In the demura process, a camera needs to shoot a positioning map to position the sub-pixels in the display panel.

[0004] However, in the prior art, when the display panel has a curved area, the sub-pixel positioning is inaccurate, the compensation data calculation is inaccurate, the demura effect is poor, and the picture quality of the display panel is poor. SUMMARY

[0005] The present application provides a photograph positioning method and device of a display panel to accurately position the sub-pixels in the display panel, to avoid the influence of inaccurate sub-pixel positioning on compensation data calculation, to ensure the demura effect, and to improve the display picture quality.

[0006] In a first aspect, embodiments of the present application provide a photograph positioning method of a display panel, wherein the display panel includes a curved area; the photograph positioning method of the display panel includes:

[0007] controlling the display panel to display a preset positioning map, so that when the display panel displays the preset positioning map, the display gray scale corresponding to the multiple columns of sub-pixels lit in the curved area in the direction from the edge of the curved area away from the center of the display panel to the edge close to the center of the display panel gradually changes according to a preset gradient mode;

[0008] shooting the display panel displaying the preset positioning map to determine the positions of the sub-pixels in the display panel according to the image obtained by shooting.

[0009] Optionally, the controlling the display panel to display the preset positioning map includes:

[0010] controlling the display panel to display the preset positioning map according to preset display data corresponding to the preset positioning map, wherein the preset display data includes preset curved display data corresponding to the curved area;

[0011] The preset curved display data includes target display gray scales of preset lighted sub-pixels in each column of sub-pixels in the curved area, and the target display gray scales of the preset lighted sub-pixels in the curved area gradually change in a preset manner along a direction from an edge of the curved area far away from the center of the display panel to an edge of the curved area close to the center of the display panel.

[0012] The preset curved display data includes target display gray scales of preset lighted sub-pixels in each column of sub-pixels in the curved area, and the target display gray scales of the preset lighted sub-pixels in the curved area gradually change in a preset manner along a direction from an edge of the curved area far away from the center of the display panel to an edge of the curved area close to the center of the display panel.

[0013] The target display gray scales of the preset lighted sub-pixels in the curved area are equal.

[0014] The target display gray scales of the preset lighted sub-pixels in the curved area are equal.

[0015] The display panel includes a planar area connected to the curved area.

[0016] The preset display data further includes preset planar display data, and the preset planar display data includes target display gray scales corresponding to each sub-pixel in the planar area.

[0017] The target display gray scale of each preset lighted sub-pixel in the planar area is equal to the target display gray scale of a column of preset lighted sub-pixels in the curved area connected to the planar area.

[0018] The target display gray scale of each preset lighted sub-pixel in the planar area is related to the width of the curved area and the curvature of the curved area.

[0019] The target display gray scale of each preset lighted sub-pixel in the planar area is positively related to an absolute value of a difference between the target display gray scale of a preset lighted sub-pixel in a column of sub-pixels farthest away from the center of the display panel and the target display gray scale of the preset lighted sub-pixel in the planar area.

[0020] The target display gray scale of each preset lighted sub-pixel in the planar area is positively related to an absolute value of a difference between the target display gray scale of a preset lighted sub-pixel in a column of sub-pixels farthest away from the center of the display panel and the target display gray scale of the preset lighted sub-pixel in the planar area.

[0021] Optionally, before the display panel displays the preset positioning map, the display panel displays the preset positioning map, and the display gray scale corresponding to the multiple columns of sub-pixels that light up in the curved area gradually changes according to a preset gradual change mode from an edge of the curved area away from the center of the display panel to an edge of the curved area close to the center of the display panel, and the preset gradual change mode comprises:

[0022] The display panel displays the initial positioning map according to initial display data corresponding to the initial positioning map, wherein the initial display data comprises initial target display gray scales corresponding to the preset light-up sub-pixels of the display panel, and the initial target display gray scales corresponding to the preset light-up sub-pixels are equal;

[0023] The preset display data is determined according to the difference between the luminance data of at least two columns of sub-pixels in the initial positioning map obtained by shooting.

[0024] Optionally, when the display panel only comprises the curved area, the preset display data is determined according to the difference between the luminance data of at least two columns of sub-pixels in the initial positioning map obtained by shooting.

[0025] The preset display data is determined according to the difference between the luminance data of the columns of sub-pixels in the curved area.

[0026] Optionally, when the display panel comprises the curved area and the flat area connected to the curved area, the preset display data is determined according to the difference between the luminance data of at least two columns of sub-pixels in the initial positioning map obtained by shooting.

[0027] The preset display data is determined according to the luminance difference between the luminance data of the columns of sub-pixels in the curved area and the luminance data of the sub-pixels in the flat area.

[0028] Optionally, the preset gradual change mode is a gradual change mode from large to small or a gradual change mode from small to large, and the preset gradual change mode is related to the bending direction of the curved area, and the bending direction of the curved area is inward bending or outward bending.

[0029] Optionally, the bending direction of the curved area is outward bending, and the preset gradual change mode is a gradual change mode from large to small.

[0030] Alternatively, the bending direction of the curved area is inward bending, and the preset gradual change mode is a gradual change mode from small to large.

[0031] Alternatively, the bending direction of the curved area is inward bending, and the preset gradual change mode is a gradual change mode from large to small.

[0032] Optionally, the display panel is shot to determine the positions of the sub-pixels in the display panel according to the image obtained by shooting.

[0033] determine the position of the sub-pixels that are not lit in the display panel according to the position of the sub-pixels that are lit;

[0034] determine the position of the sub-pixels that are not lit in the display panel according to the position of the sub-pixels that are lit;

[0035] Optionally, the lighting states of the portions of the sub-pixels in the row that are located in the curved surface region are the same.

[0036] In a second aspect, the embodiments of the present application further provide a photographing positioning device of a display panel, the display panel comprising a curved surface region; the photographing positioning device of the display panel comprising:

[0037] a control module configured to control the display panel to display a preset positioning image, so that when the display panel displays the preset positioning image, the display gray scale corresponding to the plurality of columns of sub-pixels that are lit in the curved surface region gradually changes in a preset manner along a direction from an edge of the curved surface region close to the center of the display panel to an edge of the curved surface region far from the center of the display panel;

[0038] a positioning module configured to photograph the display panel displaying the preset positioning image, so as to determine the position of the sub-pixels in the display panel according to an image obtained by the photographing.

[0039] The photographing positioning method and device of the display panel according to the embodiments of the present application can control the display panel to display a preset positioning image, so that when the display panel displays the preset positioning image, the display gray scale corresponding to the plurality of columns of sub-pixels that are lit in the curved surface region gradually changes in a preset manner along a direction from an edge of the curved surface region close to the center of the display panel to an edge of the curved surface region far from the center of the display panel; this can ensure that the luminance data of the sub-pixels corresponding to the same gray scale at different positions is relatively small or consistent when the camera photographs the preset positioning image displayed by the display panel. Then, the display panel displaying the preset positioning image is photographed, so as to determine the position of the sub-pixels in the display panel according to an image obtained by the photographing; this can improve the accuracy of the determination of the position of the sub-pixels in the display panel according to the preset positioning image, so as to avoid the influence of inaccurate positioning of the sub-pixels on the calculation of compensation data, ensure the accuracy of the calculation of the compensation data in the subsequent steps of demura, and improve the quality of the display image. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a schematic diagram of the photographing of the display panel comprising the curved surface region by the camera;

[0041] Figure 2 is a flowchart of a photographing positioning method of a display panel according to an embodiment of the present application;

[0042] Figure 3 is a structural schematic diagram of an inward-bending display panel according to an embodiment of the present application;

[0043] Figure 4 is a flowchart of another display panel photographing positioning method provided by an embodiment of the present application;

[0044] Figure 5 is a flowchart of another display panel photographing positioning method provided by an embodiment of the present application;

[0045] Figure 6 is a structural schematic diagram of a display panel photographing positioning device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, but not all the structures.

[0047] As described in the background, in the prior art, when the display panel has a curved area, the sub-pixel positioning is inaccurate, the compensation data calculation is inaccurate, the demura effect is poor, and the picture quality of the display panel is poor. Figure 1 is a schematic diagram of a camera photographing a display panel including a curved area, referring to Figure 1 The inventor has found that the reason for the above problems is that the vertical distance between the curved area 11 of the display panel and the camera 20 is different, so that when the display panel photographs the positioning map, the luminance data of the sub-pixels at different positions obtained by the camera 20 at the same gray level is inconsistent, which affects the positioning of the sub-pixels. In the demura process, after the camera 20 photographs the positioning map to position the sub-pixels in the display panel, the demura gray level map is photographed, and then the compensation data is calculated according to the luminance data corresponding to the gray level map. Therefore, the inaccurate positioning of the sub-pixels will eventually lead to inaccurate calculation of the compensation data, poor demura effect, and poor picture quality of the display panel.

[0048] Based on the above reasons, an embodiment of the present application provides a display panel photographing positioning method. Figure 2 is a flowchart of a display panel photographing positioning method provided by an embodiment of the present application, which can be executed by a display panel photographing positioning device, which can be integrated in a high-resolution industrial camera. The display panel includes a curved area, referring to Figure 2 The display panel photographing positioning method includes:

[0049] In step 110, the display panel is controlled to display a preset positioning map, so that when the display panel displays the preset positioning map, the display gray scale corresponding to the multiple columns of sub-pixels that are lit in the curved area gradually changes in a preset gradient manner from the edge of the curved area away from the center of the display panel to the edge of the curved area close to the center of the display panel.

[0050] Specifically, the photographing positioning method of the display panel in this embodiment can be applied to a display panel in which the entire display area of the display panel is curved, that is, the display area of the display panel is a curved area; or the photographing positioning method of the display panel in this embodiment can be applied to a display panel in which part of the display area of the display panel is curved, for example, the display panel can include a curved area and a flat area. The curved area of the display panel includes multiple sub-pixels, and the flat area of the display panel also includes multiple sub-pixels.

[0051] In this embodiment, the preset display data corresponding to the preset positioning map can be preset in the photographing positioning device of the display panel; or the preset display data can be determined by other methods before step 110. The photographing positioning device of the display panel is in communication connection with the driving chip of the display panel. When the sub-pixel positioning of the display panel is performed, the photographing positioning device transmits the preset display data to the driving chip, and the driving chip drives the display panel to display the preset positioning map, so that when the display panel displays the preset positioning map according to the preset display data, the display gray scale corresponding to the multiple columns of sub-pixels that are lit in the curved area gradually changes in a preset gradient manner from the edge of the curved area away from the center of the display panel to the edge of the curved area close to the center of the display panel. Figure 1 For example, in the direction x from the edge of the curved area away from the center of the display panel to the edge of the curved area close to the center of the display panel, the display gray scale corresponding to the multiple columns of sub-pixels that are lit in the curved area gradually changes in a preset gradient manner.

[0052] Specifically, the bending direction of the curved area includes outward bending and inward bending. When the bending direction is outward bending, the distance between the light emitting surface of the display panel and the human eye gradually increases from the edge of the curved area close to the center of the display panel to the edge of the curved area away from the center of the display panel when the human eye directly views the display panel. When the bending direction is inward bending, the distance between the light emitting surface of the display panel and the human eye gradually decreases from the edge of the curved area close to the center of the display panel to the edge of the curved area away from the center of the display panel when the human eye directly views the display panel. Figure 1 The display panel shown in FIG. 1 is an outward bending display panel, which includes two curved areas 11 and a flat area 12 between the two curved areas 11. The two curved areas are a first curved area 111 and a second curved area 112. Figure 1 The bending directions of the first curved area 111 and the second curved area 112 are both outward bending, but the specific outward bending directions are different. The direction from the edge of the first curved area 111 away from the center of the display panel to the edge of the first curved area 111 close to the center of the display panel is a first bending direction x1. Figure 1 The direction from the edge of the second curved area 112 away from the center of the display panel to the edge of the second curved area 112 close to the center of the display panel is a second bending direction x2. Figure 1The second bending direction x2 is shown in FIG. 1B. When a person views the display panel, the vertical distance between the light-out surface of the display panel and the eye gradually increases from the edge of the first curved surface region 111 close to the center of the display panel to the edge far from the center of the display panel. Similarly, when a person views the display panel, the vertical distance between the light-out surface of the display panel and the eye gradually increases from the edge of the second curved surface region 112 close to the center of the display panel to the edge far from the center of the display panel.

[0053] Figure 3 FIG. 1A is a structural schematic diagram of an inner-bending display panel according to an embodiment of the present application. Figure 3 The display panel is a curved display panel, and the entire display area is a curved surface region 11, which includes a third curved surface region 113 and a fourth curved surface region 114. Figure 3 The left edge of the curved surface region 11 can be the third curved surface region 113. Figure 3 The right edge of the curved surface region 11 can be the fourth curved surface region 114. Figure 3 When the bending direction is inner bending, the vertical distance between the light-out surface of the display panel and the eye gradually decreases from the edge of the curved surface region 11 far from the center of the display panel to the edge close to the center of the display panel. In the third curved surface region 113 and the fourth curved surface region 114 shown in FIG. 1A, the bending direction is inner bending, but the specific outer bending direction is different. Figure 3 The third curved surface region 113 and the fourth curved surface region 114 shown in FIG. 1A have different bending directions. The edge of the third curved surface region 113 far from the center of the display panel to the edge close to the center of the display panel bends in the third bending direction x3 shown in FIG. 1B. Figure 3 The edge of the fourth curved surface region 114 far from the center of the display panel to the edge close to the center of the display panel bends in the fourth bending direction x4 shown in FIG. 1C. Figure 3 The edge of the fourth curved surface region 114 far from the center of the display panel to the edge close to the center of the display panel bends in the fourth bending direction x4 shown in FIG. 1C.

[0054] It should be noted that when the bending direction of the curved surface region is outer bending, the bending direction when the curved surface region is outer bending can also be different according to the bending radius of the curved surface region, that is, the outer bending of the curved surface region can include multiple bending directions. Similarly, when the bending direction of the curved surface region is inner bending, the bending direction when the curved surface region is inner bending can also be different according to the bending radius of the curved surface region, that is, the inner bending of the curved surface region can also include multiple bending directions.

[0055] In this embodiment, the gradual change mode is set in relation to the bending direction, including a gradual change mode from large to small and a gradual change mode from small to large. When the bending direction of the curved area is outward, the gradual change mode is set to the gradual change mode from large to small; when the bending direction of the curved area is inward, the gradual change mode is set to the gradual change mode from small to large, thereby compensating for the influence of the different vertical distances of the sub-pixels in the curved area from the camera on the brightness data.

[0056] It should be noted that, considering the influence of the light-emitting direction of the sub-pixels, when the bending direction of the curved area is inward, the gradual change mode is set to the gradual change mode from large to small, which is not specifically limited in this embodiment.

[0057] Specifically, the preset display data corresponding to the preset positioning map can be determined according to the bending direction of the curved area of the display panel, so that when the display panel displays the preset positioning map, in the curved area, the display gray scale corresponding to the multiple columns of sub-pixels that are lit in the curved area gradually changes in the set gradual change mode from the edge of the curved area away from the center of the display panel to the edge close to the center of the display panel, so as to ensure that when the camera captures the preset positioning map displayed by the display panel, the brightness data of the sub-pixels at different positions corresponding to the same gray scale is small or consistent.

[0058] In the direction from the edge of the curved area away from the center of the display panel to the edge close to the center of the display panel, the display gray scale corresponding to the multiple columns of sub-pixels that are lit in the curved area gradually changes in the set gradual change direction mode, which can also be that the display gray scale corresponding to the part of the columns of sub-pixels that are lit in the curved area gradually changes in the set gradual change direction mode, or that the display gray scale corresponding to all the columns of sub-pixels that are lit in the curved area gradually changes in the set gradual change direction mode.

[0059] Step 120, capturing the display panel displaying the preset positioning map to determine the position of the sub-pixels in the display panel according to the captured image.

[0060] The display panel displays the preset positioning diagram, and a camera photographs the display panel displaying the preset positioning diagram. In the process of displaying the preset positioning diagram, part of the sub-pixels of the display panel are lit, and part of the sub-pixels are not lit. For example, the preset positioning diagram can be a checkerboard pattern. According to the control of step 110, when the display panel displays the preset positioning diagram, the display gray levels corresponding to the multiple columns of sub-pixels lit in the curved area gradually change in a preset gradient manner along the direction from the edge of the curved area far away from the center of the display panel to the edge close to the center of the display panel. This can ensure that the luminance data of the sub-pixels at different positions corresponding to the same gray level are small or consistent when the camera photographs the preset positioning diagram displayed by the display panel. In this way, when the positions of the sub-pixels in the display panel are determined according to the preset positioning diagram, the accuracy of the determination of the positions of the sub-pixels can be improved, so as to avoid the influence of inaccurate positioning of the sub-pixels on the calculation of compensation data and ensure the accuracy of the calculation of the compensation data in the subsequent steps of demura.

[0061] The photographing positioning method of the display panel can control the display panel to display the preset positioning diagram, so that when the display panel displays the preset positioning diagram, the display gray levels corresponding to the multiple columns of sub-pixels lit in the curved area gradually change in a preset gradient manner along the direction from the edge of the curved area far away from the center of the display panel to the edge close to the center of the display panel. This can ensure that the luminance data of the sub-pixels at different positions corresponding to the same gray level are small or consistent when the camera photographs the preset positioning diagram displayed by the display panel. Then, the display panel displaying the preset positioning diagram is photographed, and the positions of the sub-pixels in the display panel are determined according to the photographed image. In this way, when the positions of the sub-pixels in the display panel are determined according to the preset positioning diagram, the accuracy of the determination of the positions of the sub-pixels can be improved, so as to avoid the influence of inaccurate positioning of the sub-pixels on the calculation of compensation data and ensure the accuracy of the calculation of the compensation data in the subsequent steps of demura, thereby improving the quality of the display picture.

[0062] On the basis of the above technical solution, the display panel can be controlled to display the preset positioning diagram, so that when the display panel displays the preset positioning diagram, the display gray levels corresponding to the multiple columns of sub-pixels lit in the curved area gradually change in a preset gradient direction manner along the direction from the edge of the curved area close to the edge far away from the center of the display panel to the edge far away from the edge close to the center of the display panel. This includes: controlling the display panel to display the preset positioning diagram according to the preset display data corresponding to the preset positioning diagram, so that when the display panel displays the preset positioning diagram, the display gray levels corresponding to the multiple columns of sub-pixels lit in the curved area gradually change in a preset gradient direction manner along the direction from the edge of the curved area close to the edge far away from the center of the display panel to the edge far away from the edge close to the center of the display panel.

[0063] In some optional embodiments of the present invention, the preset display data includes preset curved surface display data corresponding to the curved surface region. The preset curved surface display data includes the target display grayscale of the sub-pixels in the column of preset lit sub-pixels in the curved surface region that are closest to or furthest from the center of the display panel, and a preset relationship between the target display grayscale of sub-pixels in other columns and the target display grayscale of the sub-pixels in the column closest to or furthest from the center of the display panel. Within the same column of sub-pixels, the target display grayscale of the preset lit sub-pixels is equal.

[0064] Specifically, the preset lit sub-pixels in the curved area are the sub-pixels that need to be lit in the curved area when the display panel displays the preset positioning map. The preset curved surface display data may include the target display grayscale of the sub-pixels in the column closest to or furthest from the center of the display panel among the preset lit sub-pixels in the curved surface region. That is, the preset curved surface display data includes the target display grayscale of the preset lit sub-pixels in the column closest to or furthest from the center of the display panel. The preset curved surface display data also includes a preset relationship between the target display grayscale of the preset lit sub-pixels in other columns of sub-pixels in the curved surface region and the target display grayscale of the preset lit sub-pixels in the column closest to or furthest from the center of the display panel. This ensures that when the display panel displays a preset positioning map based on the preset relationship between the target display grayscale of the preset lit sub-pixels in the column closest to or furthest from the center of the display panel and the target display grayscale of the preset lit sub-pixels in other columns and the target display grayscale of the sub-pixels in the column closest to or furthest from the center of the display panel, the display grayscale of the multiple columns of lit sub-pixels in the curved surface region gradually changes in a set gradient direction along the curvature direction from the edge of the curved surface region closest to or furthest from the center of the display panel. The preset relationship can be linear or non-linear; this embodiment does not impose a specific limitation. If the preset relationship is linear, its formula can be as follows:

[0065] Gray_Target(line i )=Gray_Target(line1)-[(i-1)*a+b]

[0066] Among them, Gray_Target(line i) is the target display gray scale of the preset lighted sub-pixel in the i-th column of sub-pixels in the direction from the edge of the curved surface region far away from the center of the display panel to the edge close to the center of the display panel, wherein i is a positive integer greater than or equal to 1; Gray_Target(line1) is the target display gray scale of the preset lighted sub-pixel in the column of sub-pixels farthest away from the center of the display panel in the curved surface region. Both a and b are fixed constants, and the specific values of a and b can be obtained according to actual experiments. When a and b are both positive values, the corresponding set gradient mode is a gradient mode from large to small; when a and b are both negative values, the corresponding set gradient mode is a gradient mode from small to large.

[0067] By setting the preset display data to include preset curved surface display data corresponding to the curved surface region, and the preset curved surface display data including the target display gray scale of the preset lighted sub-pixel in the column of sub-pixels closest to or farthest away from the center of the display panel in the curved surface region, and the preset relationship between the target display gray scale of the other columns of sub-pixels and the target display gray scale of the first column of sub-pixels, the amount of data stored in the photographing positioning device of the display panel can be smaller, which is beneficial to saving storage space.

[0068] In another optional embodiment of the present application, the preset display data includes preset curved surface display data corresponding to the curved surface region, and the preset curved surface display data includes the target display gray scale of the preset lighted sub-pixel in each column of sub-pixels in the curved surface region. Among them, in the direction from the edge of the curved surface region far away from the center of the display panel to the edge close to the center of the display panel, the target display gray scale of the preset lighted sub-pixel in the multiple columns of sub-pixels gradually changes according to the set mode, so that when the display panel is controlled to display the preset positioning image according to the target display gray scale of the preset lighted sub-pixel in each column of sub-pixels in the curved surface region, the display gray scale corresponding to the multiple columns of sub-pixels in the curved surface region gradually changes according to the set gradient mode in the direction from the edge of the curved surface region far away from the center of the display panel to the edge close to the center of the display panel. The target display gray scale of the preset lighted sub-pixel in the same column of sub-pixels is equal.

[0069] Setting the preset display data to include preset curved surface display data corresponding to the curved surface region, and the preset curved surface display data including the target display gray scale of the preset lighted sub-pixel in each column of sub-pixels in the curved surface region, can make the photographing positioning device of the display panel directly send the data of the target display gray scale corresponding to the sub-pixels in the display panel to the driving chip when performing photographing positioning, without the need for calculation, which is beneficial to improving the execution speed of the photographing positioning method.

[0070] It should be noted that the preset display data also includes the target display gray scale of the sub-pixel not lighted in the preset positioning image. The target display gray scale of the sub-pixel not lighted can be equal to 0 gray scale.

[0071] On the basis of each of the above technical solutions, optionally, the maximum target display gray scale in the preset curved surface display data is equal to the maximum gray scale that the display panel can display.

[0072] When the preset curved surface display data includes the target display gray scale of the sub-pixels in the column closest to or farthest from the center of the display panel among the preset lighted sub-pixels in the curved surface region, and the preset relationship between the target display gray scale of the sub-pixels in other columns and the target display gray scale of the sub-pixels in the column closest to or farthest from the center of the display panel, the maximum target display gray scale in the preset curved surface display data can be the target display gray scale corresponding to the sub-pixels in the column closest to or farthest from the center of the display panel among the preset lighted sub-pixels in the curved surface region, or the target display gray scale of the sub-pixels in other columns calculated according to the target display gray scale of the sub-pixels in the column closest to or farthest from the center of the display panel and the preset relationship. When the preset curved surface display data includes the target display gray scale of the preset lighted sub-pixels in each column of sub-pixels in the curved surface region, the maximum target display gray scale can correspond to the target display gray scale of the preset lighted sub-pixels in the column farthest from the center of the display panel or the target display gray scale of the preset lighted sub-pixels in the column closest to the center of the display panel.

[0073] Specifically, the maximum target display gray scale in the preset curved surface display data is equal to the maximum gray scale that the display panel can display, which is beneficial to improve the overall display brightness of the display panel when displaying the preset gray scale image. When the camera takes a photo of the display panel, the greater the overall brightness of the display panel, the shorter the time required for the photo, and therefore, setting the maximum target display gray scale in the preset display data to be equal to the maximum gray scale that the display panel can display is beneficial to improve the photo speed of the camera, and further beneficial to the fast positioning of the sub-pixels in the display panel, that is, beneficial to improve the execution speed of the photo positioning method of the display panel.

[0074] With reference to Figure 1 , the display panel includes a planar region connected to the curved surface region; the preset display data further includes preset planar display data, and the preset planar display data includes the target display gray scale corresponding to each sub-pixel in the planar region; wherein the target display gray scale of each preset lighted sub-pixel in the planar region is equal, and the difference between the target display gray scale corresponding to the preset lighted sub-pixel in the planar region and the target display gray scale corresponding to the column of sub-pixels connected to the planar region in the curved surface region is less than a set gray scale threshold.

[0075] Specifically, when the camera is located directly above the planar region of the display panel, the distance between each sub-pixel in the planar region and the camera in the vertical direction is equal, and the luminance data of the sub-pixels of the same gray scale in the planar region is also almost equal when the camera takes a photo. Therefore, the target display gray scale of each preset-lit sub-pixel in the planar region can be set to be equal. In addition, the difference between the target display gray scale corresponding to the sub-pixels in the planar region and the target display gray scale corresponding to the sub-pixels in the column of the curved surface region adjacent to the planar region is less than the set gray scale threshold, so that the luminance of the sub-pixels in the column of the curved surface region adjacent to the planar region is close to that of the sub-pixels in the planar region when the photo is taken. In addition, in the preset-lit sub-pixels in the curved surface region, the display gray scale corresponding to the multiple columns of sub-pixels in the curved surface region gradually changes in the set gradual change manner from the edge of the curved surface region away from the center of the display panel to the edge close to the center of the display panel, so that the luminance of the lit sub-pixels in the display panel is relatively consistent when the display panel displays the preset positioning map, thereby facilitating the improvement of the positioning accuracy.

[0076] Optionally, the target display gray scale corresponding to the preset-lit sub-pixels in the planar region is equal to the target display gray scale corresponding to the preset-lit sub-pixels in the column of the curved surface region adjacent to the planar region. In this way, the luminance of the sub-pixels in the column of the curved surface region adjacent to the planar region is closer to that of the sub-pixels in the planar region when the photo is taken, which is beneficial to further improve the accuracy of the positioning photo.

[0077] Optionally, the target display gray scale corresponding to the preset-lit sub-pixels in the planar region is equal to the target display gray scale corresponding to the preset-lit sub-pixels in the column of the curved surface region adjacent to the planar region. In this way, the luminance of the sub-pixels in the column of the curved surface region adjacent to the planar region is closer to that of the sub-pixels in the planar region when the photo is taken, which is beneficial to further improve the accuracy of the positioning photo.

[0078] In combination with Figure 1 and Figure 3 Optionally, the absolute value of the difference between the target display gray scale of the preset-lit sub-pixels in the planar region and the target display gray scale of the preset-lit sub-pixels in the column of sub-pixels farthest away from the center of the display panel is positively correlated with the width w0 of the curved surface region; and the absolute value of the difference between the target display gray scale of the preset-lit sub-pixels in the planar region and the target display gray scale of the preset-lit sub-pixels in the column of sub-pixels farthest away from the center of the display panel is positively correlated with the bending radius a0. The bending radius a0 can correspond to the angular radius of the arc line between the edge close to the center of the display panel and the edge away from the center of the display panel in the tangent plane of the curved surface region.

[0079] In the case that the curved radii of the curved surface regions are the same, the wider the width of the curved surface region, the greater the absolute value of the difference between the target display gray scale of the preset-lit sub-pixels of the planar region and the target display gray scale of the sub-pixels of the curved surface region farthest from the planar region; the narrower the width of the curved surface region, the smaller the absolute value of the difference between the target display gray scale of the preset-lit sub-pixels of the planar region and the target display gray scale of the sub-pixels of the curved surface region farthest from the planar region.

[0080] In the case that the widths of the curved surface regions are the same, the greater the curved radius of the curved surface region, the greater the absolute value of the difference between the target display gray scale of the preset-lit sub-pixels of the planar region and the target display gray scale of the sub-pixels of the curved surface region farthest from the planar region; the smaller the curved radius of the curved surface region, the smaller the absolute value of the difference between the target display gray scale of the preset-lit sub-pixels of the planar region and the target display gray scale of the sub-pixels of the curved surface region farthest from the planar region.

[0081] Figure 4 is a flowchart of another photograph positioning method of a display panel provided by an embodiment of the present application, referring to Figure 4 The photograph positioning method of the display panel comprises:

[0082] In step 210, the initial positioning diagram is displayed by controlling the display panel according to initial display data corresponding to the initial positioning diagram, wherein the initial display data comprises initial target display gray scales corresponding to the preset-lit sub-pixels of the display panel, and the initial target display gray scales corresponding to the preset-lit pixels are equal.

[0083] The initial display data can be preset in the photograph positioning device of the display panel. The initial target display gray scales corresponding to the preset-lit pixels of the display panel are equal. Since the display panel comprises curved surface regions, the brightness data of the sub-pixels obtained by photographing can not be completely the same.

[0084] In step 220, the preset display data is determined according to the brightness data difference of at least two columns of sub-pixels in the initial positioning diagram obtained by photographing.

[0085] When the display panel comprises a planar region and curved surface regions, the preset display data is determined according to the brightness data difference of at least one column of sub-pixels in the initial positioning diagram obtained by photographing, which are the sub-pixels of the planar region and the sub-pixels of the curved surface region. For example, the preset display data is determined according to the brightness data difference of one column of sub-pixels of the curved surface region farthest from the center of the display panel and one column of sub-pixels of the planar region in the initial positioning diagram obtained by photographing.

[0086] Specifically, the initial display data can be adjusted according to the luminance data difference of at least two columns of sub-pixels in the initial positioning image. When the luminance data difference of the sub-pixels in any two columns of sub-pixels in the photographed sub-pixels is less than a set threshold, the display gray scale of the sub-pixels in the display panel is taken as the target display gray scale of the sub-pixels in the preset display data. When the luminance data difference of the sub-pixels in any two columns of sub-pixels in the photographed sub-pixels is greater than or equal to the set threshold, the initial display data is continuously adjusted until the luminance data difference of the sub-pixels in any two columns of sub-pixels is less than the set threshold.

[0087] When the display panel only includes the curved area, the preset display data is determined according to the luminance data difference of at least two columns of sub-pixels in the photographed initial positioning image. Specifically, the preset display data is determined according to the luminance data difference of the sub-pixels in each column of the curved area in the photographed sub-pixels.

[0088] Specifically, the initial display data can be adjusted according to the luminance data difference of the sub-pixels in different columns in the photographed sub-pixels, and the luminance data of the sub-pixels in the display panel is acquired in real time. When the luminance data difference of the sub-pixels in any two adjacent columns in the photographed sub-pixels is less than a set threshold, the image displayed by the display panel at this time is taken as the preset positioning image, and correspondingly, the display gray scale of the sub-pixels in the display panel at this time is taken as the target display gray scale of the sub-pixels in the preset display data.

[0089] When the display panel includes the curved area and the flat area connected with the curved area, the preset display data is determined according to the luminance data difference of at least two columns of sub-pixels in the photographed initial positioning image. Specifically, the preset display data is determined according to the luminance difference between the luminance data of the sub-pixels in each column of the curved area and the luminance data of the sub-pixels in the flat area in the photographed sub-pixels.

[0090] Specifically, the initial display data can be adjusted according to the luminance data difference of the sub-pixels in different columns in the photographed sub-pixels, and the luminance data of the sub-pixels in the display panel is acquired in real time. When the luminance data difference of the sub-pixels in any two adjacent columns in the photographed sub-pixels is less than a set threshold, the image displayed by the display panel at this time is taken as the preset positioning image, and correspondingly, the display gray scale of the sub-pixels in the display panel at this time is taken as the target display gray scale of the sub-pixels in the preset display data.

[0091] Step 230, control the display panel to display a preset positioning map, so that when the display panel displays the preset positioning map, the display gray scale corresponding to the multiple columns of sub-pixels that are lighted in the curved area gradually changes in a preset manner from the edge of the curved area away from the center of the display panel to the edge of the curved area close to the center of the display panel; this step is the same as step 110 in the above embodiment, and will not be repeated here.

[0092] Step 240, photograph the display panel displaying the preset positioning map, so as to determine the positions of the sub-pixels in the display panel according to the photographed image; this step is the same as step 120 in the above embodiment, and will not be repeated here.

[0093] Figure 5 is a flowchart of another photographing positioning method of a display panel provided by the embodiment of the present application, referring to Figure 5 , the photographing positioning method of the display panel comprises:

[0094] Step 310, control the display panel to display a preset positioning map, so that when the display panel displays the preset positioning map, the display gray scale corresponding to the multiple columns of sub-pixels that are lighted in the curved area gradually changes in a preset manner from the edge of the curved area away from the center of the display panel to the edge of the curved area close to the center of the display panel; this step is the same as step 110 in the above embodiment, and will not be repeated here.

[0095] Step 320, determine the positions of the lighted sub-pixels according to the photographed image.

[0096] Specifically, the positions of the lighted sub-pixels can be determined according to the luminance data of the display panel displaying the preset positioning map and a preset algorithm in the photographing positioning device of the display panel. The preset algorithm can be any algorithm for calculating the positions of sub-pixels in the prior art.

[0097] Step 330, determine the positions of the unlighted sub-pixels in the display panel according to the positions of the lighted sub-pixels.

[0098] Specifically, because the sub-pixels are regularly arranged in the display panel, the positions of the unlighted sub-pixels can be calculated according to the positions of the lighted sub-pixels.

[0099] It should be noted that because the curved surface area is curved, the regular arrangement of the sub-pixels is affected, and the accuracy of determining the position of the non-lighting sub-pixel according to the position of the lighting sub-pixel in the same row of the curved surface area is poor when the lighting states of the part of the sub-pixels in the curved surface area in a row are different. Therefore, the lighting states of the part of the sub-pixels in the curved surface area in a row are set to be the same, that is, the part of the sub-pixels in the curved surface area in a row are all lit or all unlit, the position of the all-lit sub-pixel can be determined according to the brightness data of the all-lit sub-pixel in the part of the sub-pixels in the curved surface area in a row, and then the position of the non-lighting sub-pixel in the same column can be determined according to the position of the all-lit sub-pixel in the curved surface area in the same row, which is beneficial to improving the accuracy of determining the position of the sub-pixel in the curved surface area.

[0100] The embodiment of the present application also provides a photographing positioning device of a display panel, which is used for executing the photographing positioning method of any of the above-mentioned embodiments of the present application, and can be integrated in a high-resolution industrial camera. The display panel comprises a curved surface area. Figure 6 FIG. 1 is a structural schematic diagram of a photographing positioning device of a display panel provided by an embodiment of the present application, referring to Figure 6 The photographing positioning device of the display panel comprises:

[0101] The control module 410 is configured to control the display panel to display a preset positioning image, so that when the display panel displays the preset positioning image, the display gray scale corresponding to the plurality of columns of lighting sub-pixels in the curved surface area gradually changes in a preset manner along the direction from the edge of the curved surface area close to the center of the display panel to the edge of the curved surface area far from the center of the display panel.

[0102] The positioning module 420 is configured to photograph the display panel displaying the preset positioning image, and determine the position of the sub-pixel in the display panel according to the image obtained by photographing.

[0103] The photographing positioning device of the display panel provided by the embodiment of the present application is used for executing the photographing positioning method of any of the above-mentioned embodiments of the present application, and has the beneficial effects of the photographing positioning method of any of the above-mentioned embodiments of the present application, which will not be repeated here.

[0104] It should be noted that the above-mentioned are only the preferred embodiments of the present application and the applied technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A method for photographing positioning of a display panel, characterized in that, The display panel comprises a curved area; and a photograph positioning method of the display panel comprises: controlling the display panel to display a preset positioning picture, so that when the display panel displays the preset positioning picture, display gray scales corresponding to a plurality of columns of sub-pixels that are lit in the curved area gradually change in a preset manner along a direction from an edge of the curved area that is far away from a center of the display panel to an edge of the curved area that is close to the center of the display panel; photographing the display panel that displays the preset positioning picture to determine positions of sub-pixels in the display panel according to an image obtained by photographing; controlling the display panel to display the preset positioning picture comprises: controlling the display panel to display the preset positioning picture according to preset display data corresponding to the preset positioning picture, wherein the preset display data comprises preset curved display data corresponding to the curved area; before the controlling the display panel to display the preset positioning picture, so that when the display panel displays the preset positioning picture, display gray scales corresponding to a plurality of columns of sub-pixels that are lit in the curved area gradually change in a preset manner along a direction from an edge of the curved area that is far away from a center of the display panel to an edge of the curved area that is close to the center of the display panel, the method further comprises: controlling the display panel to display an initial positioning picture according to initial display data corresponding to the initial positioning picture, wherein the initial display data comprises initial target display gray scales corresponding to sub-pixels that are lit at each preset position of the display panel, and the initial target display gray scales corresponding to the sub-pixels that are lit at each preset position are equal; determining the preset display data according to differences in brightness data of at least two columns of the sub-pixels under the initial positioning picture obtained by photographing.

2. The photographing positioning method of the display panel according to claim 1, characterized in that, In the method, the preset curved display data comprises a target display gray scale of sub-pixels in a column that is closest to or farthest from the center of the display panel among preset lit sub-pixels in the curved area, and a preset relationship between a target display gray scale of sub-pixels in other columns and the target display gray scale of the sub-pixels in the column that is closest to or farthest from the center of the display panel, and the target display gray scales of the preset lit sub-pixels in the same column are equal; alternatively, the preset curved display data comprises target display gray scales of preset lit sub-pixels in each column of sub-pixels in the curved area, and the target display gray scales of a plurality of columns of sub-pixels among the preset lit sub-pixels gradually change in a preset manner along a direction from an edge of the curved area that is far away from a center of the display panel to an edge of the curved area that is close to the center of the display panel; the target display gray scales of the preset lit sub-pixels in the same column are equal.

3. The photographing positioning method of the display panel according to claim 2, characterized in that, a maximum target display gray scale in the preset curved display data is equal to a maximum gray scale that can be displayed by the display panel.

4. The photographing positioning method of the display panel according to claim 2, characterized in that, the display panel comprises a planar area that is connected to the curved area. The preset display data further comprises preset planar display data, the preset planar display data comprising target display gray scales corresponding to each of the sub-pixels in a planar region; wherein the target display gray scales of each preset-lit sub-pixel in the planar region are equal, and the difference between the target display gray scale of each preset-lit sub-pixel in the planar region and the target display gray scale of a column of sub-pixels in the curved region corresponding to the planar region is less than a preset gray scale threshold.

5. The photographing positioning method of the display panel according to claim 4, characterized in that, The target display gray scale of each preset-lit sub-pixel in the planar region is equal to the target display gray scale of a column of preset-lit sub-pixels in the curved region corresponding to the planar region.

6. The photographing positioning method of the display panel according to claim 4, characterized in that, The target display gray scale of each preset-lit sub-pixel in the planar region is related to the width of the curved region and the curvature of the curved region.

7. The photographing positioning method of the display panel according to claim 6, characterized in that, The target display gray scale of each preset-lit sub-pixel in the planar region is positively related to the absolute value of the difference between the target display gray scale of each preset-lit sub-pixel in the planar region and the target display gray scale of a column of preset-lit sub-pixels farthest from the center of the display panel. The target display gray scale of each preset-lit sub-pixel in the planar region is positively related to the absolute value of the difference between the target display gray scale of each preset-lit sub-pixel in the planar region and the target display gray scale of a column of preset-lit sub-pixels farthest from the center of the display panel.

8. The photographing positioning method of the display panel according to claim 1, wherein when the display panel only comprises the curved region, the preset display data is determined according to the difference between the luminance data of at least two columns of sub-pixels in the initial positioning image obtained by photographing, and the preset display data is determined by: determining the preset display data according to the difference between the luminance data of each column of sub-pixels in the curved region among the lit sub-pixels. when the display panel comprises the curved region and a planar region connected to the curved region, the preset display data is determined according to the difference between the luminance data of at least two columns of sub-pixels in the initial positioning image obtained by photographing, and the preset display data is determined by: determining the preset display data according to the luminance difference between the luminance data of each column of sub-pixels in the curved region and the luminance data of the sub-pixels in the planar region among the lit sub-pixels.

9. The photographing positioning method of the display panel according to claim 1, wherein the preset gradient mode is a gradient mode from large to small or a gradient mode from small to large, and the preset gradient mode is related to the bending direction of the curved region, and the bending direction of the curved region is inward bending or outward bending. when the bending direction of the curved region is outward bending, the preset gradient mode is a gradient mode from large to small; or, when the bending direction of the curved region is inward bending, the preset gradient mode is a gradient mode from small to large; 10. The photographing positioning method of the display panel according to claim 9, characterized in that, or, when the bending direction of the curved region is inward bending, the preset gradient mode is a gradient mode from large to small. The display panel displaying the preset positioning image is photographed to determine the position of the sub-pixels in the display panel according to the photographed image, and the position of the lit sub-pixels is determined according to the photographed image. ​ 11. The photographing positioning method of the display panel according to claim 1, characterized in that, ​ ​ The position of the un-lit sub-pixel in the display panel is determined according to the position of the lit sub-pixel.

12. The photographing positioning method of the display panel according to claim 11, characterized in that, The lighting states of the part of the sub-pixels in one row located in the curved area are the same.

13. A photographing positioning device of a display panel, characterized in that, The display panel comprises a curved area; and a photographing positioning device of the display panel comprises: The control module is configured to control the display panel to display a preset positioning image, so that when the display panel displays the preset positioning image, the display gray scale corresponding to the multiple columns of sub-pixels lit in the curved area gradually changes in a set gradual change manner along a direction from an edge of the curved area far away from the center of the display panel to an edge close to the center of the display panel. The positioning module is configured to photograph the display panel displaying the preset positioning image, so as to determine the position of the sub-pixel in the display panel according to the photographed image. The control of the display panel to display the preset positioning image comprises: controlling the display panel to display the preset positioning image according to preset display data corresponding to the preset positioning image, wherein the preset display data comprises preset curved display data corresponding to the curved area; before the control of the display panel to display the preset positioning image, so that when the display panel displays the preset positioning image, the display gray scale corresponding to the multiple columns of sub-pixels lit in the curved area gradually changes in a set gradual change manner along a direction from an edge of the curved area far away from the center of the display panel to an edge close to the center of the display panel, the method further comprises: controlling the display panel to display an initial positioning image according to initial display data corresponding to the initial positioning image, wherein the initial display data comprises initial target display gray scales corresponding to the sub-pixels lit at each preset position of the display panel, and the initial target display gray scales corresponding to the sub-pixels lit at each preset position are equal; determining the preset display data according to the difference between the luminance data corresponding to at least two columns of the sub-pixels under the initial positioning image.

Images