WO2017152465A1 - 曲面液晶面板的Mura现象补偿方法 - Google Patents

曲面液晶面板的Mura现象补偿方法 Download PDF

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WO2017152465A1
WO2017152465A1 PCT/CN2016/079161 CN2016079161W WO2017152465A1 WO 2017152465 A1 WO2017152465 A1 WO 2017152465A1 CN 2016079161 W CN2016079161 W CN 2016079161W WO 2017152465 A1 WO2017152465 A1 WO 2017152465A1
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liquid crystal
crystal panel
compensation
mura
curved liquid
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English (en)
French (fr)
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张华�
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US15/039,415 priority Critical patent/US10121402B2/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method for compensating for a Mura phenomenon of a curved liquid crystal panel.
  • LCDs liquid crystal displays
  • some physical factors on the LCD display panel are different due to some uncontrollable factors in the actual process, resulting in more than one In the range of pixel points, the phenomenon of uneven brightness when displaying a pure gray image is known as the Mura phenomenon in the industry.
  • the Mura phenomenon has become a bottleneck restricting LCD development.
  • the probability of occurrence of the Mura phenomenon can be reduced by increasing the level of the process or improving the purity of the raw materials.
  • the physical characteristics have been finalized.
  • the brightness of the pixel can be corrected by the gray compensation method, thereby improving the Mura phenomenon.
  • the gradation compensation is to improve the brightness uniformity by changing the gradation value of the pixel: that is, the Mura condition of the gradation picture is captured by the camera, then the normal area and the Mura area in the gradation image are determined, and finally the ash according to the normal area is determined.
  • the degree value inversely compensates the gray value of the Mura region, and when the pure gray image is displayed, a lower gray value is applied to the pixel having a higher display brightness, and a higher gray value is applied to the pixel having a lower display brightness. Therefore, the brightness of each pixel after gray compensation is nearly uniform, and the Mura phenomenon is improved.
  • the industry's Mura compensation repair method is based on the panel as a flat state, as shown in Figure 1, because the panel captured by the camera differs in the display area between the planar state and the curved state, and the planar length b in the curved state is smaller than the planar state.
  • the plane length a so the existing planar Mura compensation repair method can not be directly used to calculate the Mura compensation value of each position of the panel in the surface state, and the Mura phenomenon compensation method suitable for the surface panel must be developed.
  • An object of the present invention is to provide a Mura phenomenon compensation method for a curved liquid crystal panel, which can obtain correct Mura compensation data of a curved liquid crystal panel in a curved state, and improve product quality of the curved liquid crystal panel.
  • the present invention provides a method for compensating the Mura phenomenon of a curved liquid crystal panel, comprising the following steps:
  • Step 1 Providing a curved liquid crystal panel and a camera, and photographing the curved liquid crystal panel of the display screen with a camera, and obtaining image Mura compensation data of the curved liquid crystal panel according to the collected image;
  • the image Mura compensation data includes: a Mura compensation value, and a compensation point position corresponding to the Mura compensation value, where the compensation point position is a position of the compensation point in an image collected by the camera;
  • Step 2 Correct the position of the compensation point in the image Mura compensation data obtained in step 1, and obtain the corrected compensation point position, where the corrected compensation point position is the position of the compensation point in the plane development view of the curved liquid crystal panel. And replacing the position of the compensation point in the image Mura compensation data with the corrected compensation point position to obtain the plane Mura compensation data of the curved liquid crystal panel;
  • Step 3 Perform Mura compensation on the curved liquid crystal panel according to the planar Mura compensation data obtained in step 2.
  • the camera photographs the LCD display panel at a fixed position.
  • the image acquired by the camera is a planar image.
  • the camera takes a picture above the center point of the curved liquid crystal display panel.
  • the formula for correcting the position of the compensation point in the image Mura compensation data obtained in step 1 in the step 2 is:
  • z is the distance from the position of the compensation point in the planar development view of the curved liquid crystal panel to the vertical center line in the planar development view
  • y is the position of the compensation point in the image captured by the camera to the vertical of the image
  • x R ⁇ cos ⁇ arcsin[b/(2R)] ⁇
  • R is the radius of curvature of the curved liquid crystal panel in the curved state
  • b is the length of the image captured by the camera.
  • the camera photographs the curved liquid crystal panel three times or more, and the gray scale of the curved liquid crystal panel display screen is different each time the image is taken, so that the obtained image Mura compensation data is three or more.
  • the gray scale of the screen displayed by the curved liquid crystal panel is selected from the grayscale interval including the 0 gray scale and the maximum gray scale.
  • the maximum gray level is 255 gray scales.
  • the invention also provides a method for compensating the Mura phenomenon of a curved liquid crystal panel, comprising the following steps Step:
  • Step 1 Providing a curved liquid crystal panel and a camera, and photographing the curved liquid crystal panel of the display screen with a camera, and obtaining image Mura compensation data of the curved liquid crystal panel according to the collected image;
  • the image Mura compensation data includes: a Mura compensation value, and a compensation point position corresponding to the Mura compensation value, where the compensation point position is a position of the compensation point in an image collected by the camera;
  • Step 2 Correct the position of the compensation point in the image Mura compensation data obtained in step 1, and obtain the corrected compensation point position, where the corrected compensation point position is the position of the compensation point in the plane development view of the curved liquid crystal panel. And replacing the position of the compensation point in the image Mura compensation data with the corrected compensation point position to obtain the plane Mura compensation data of the curved liquid crystal panel;
  • Step 3 performing Mura compensation on the curved liquid crystal panel according to the planar Mura compensation data obtained in step 2;
  • the camera photographs the LCD display panel at a fixed position
  • the camera photographs the curved liquid crystal panel three times or more, and the gray scale of the curved liquid crystal panel display screen is different each time the image is taken, so that the obtained image Mura compensation data is three or more.
  • the present invention provides a Mura phenomenon compensation method for a curved liquid crystal panel.
  • image Mura compensation data of the curved liquid crystal panel is obtained according to an image acquired by a camera, and the image Mura compensation data includes: Mura compensation.
  • the compensation point position is a position of the compensation point in the image collected by the camera, and then correcting the position of the compensation point in the obtained image Mura compensation data, and obtaining the corrected
  • the position of the compensation point, the corrected compensation point position is the position of the compensation point in the plane development view of the curved liquid crystal panel, and the position of the compensation point in the image Mura compensation data is replaced by the corrected compensation point position to obtain the curved liquid crystal panel.
  • the plane Mura compensates the data, and finally performs Mura compensation on the curved liquid crystal panel according to the plane Mura compensation data, so that the position of the compensation point in the curved liquid crystal panel can be accurately found, and the correct Mura compensation is performed on the curved liquid crystal panel in the curved state.
  • Figure 1 is a comparison of the same liquid crystal panel captured by the camera in a planar state and a curved state.
  • FIG. 2 is a flow chart of a method for compensating for a Mura phenomenon of a curved liquid crystal panel of the present invention
  • step 2 of the Mura phenomenon compensation method of the curved liquid crystal panel of the present invention is a schematic diagram of step 2 of the Mura phenomenon compensation method of the curved liquid crystal panel of the present invention.
  • the present invention provides a Mura phenomenon compensation method for a curved liquid crystal panel, which includes the following steps:
  • Step 1 providing a curved liquid crystal panel and a camera, causing the camera to take a picture of the curved liquid crystal panel of the display screen, and obtaining image Mura compensation data of the curved liquid crystal panel according to the acquired image, the image Mura compensation data comprising: Mura compensation a value, and a compensation point position corresponding to the Mura compensation value, where the compensation point position is a position of the compensation point in the image collected by the camera;
  • the camera photographs the LCD display panel at a fixed position.
  • the camera takes a picture above the center point of the curved liquid crystal display panel.
  • Step 2 Correct the position of the compensation point in the image Mura compensation data obtained in step 1, and obtain the corrected compensation point position, where the corrected compensation point position is the position of the compensation point in the plane development view of the curved liquid crystal panel. And replacing the position of the compensation point in the image Mura compensation data with the corrected compensation point position to obtain the plane Mura compensation data of the curved liquid crystal panel;
  • the Mura compensation system since the image captured by the camera is always a plane, for the curved liquid crystal panel in the curved state, if the Mura compensation calculation method in the planar state is still used, the Mura compensation system will use the curved liquid crystal panel.
  • the compensation data at the point E (the camera is confirmed as point A) is placed at the position of point F (the length of the DF arc is equal to the length of the line AB), causing the compensation position to be wrong, so correct position parameter correction is required;
  • Point B is the midpoint of the length of the image captured by the camera
  • point D is the midpoint of the length of the planar development of the curved liquid crystal panel;
  • z is the distance from the position of the compensation point in the planar development view of the curved liquid crystal panel to the vertical center line in the planar development view
  • y is the position of the compensation point in the image captured by the camera to the vertical of the image
  • x R ⁇ cos ⁇ arcsin[b/(2R)] ⁇
  • R is the radius of curvature of the curved liquid crystal panel in the curved state
  • b is the length of the image captured by the camera.
  • the curved liquid crystal panel has a circular arc shape.
  • the image captured by the machine is the chord of the arc, and the E point is the actual position of the compensation point.
  • the position corresponding to the image captured by the camera is point A.
  • the position of the compensation point on the curved surface of the curved liquid crystal panel is found by the position of the compensation point on the image collected by the camera, and then the corresponding relationship is used to restore the compensation value to the correct position, so that the Mura compensation system can Correct Mura compensation for curved LCD panels in curved state.
  • Step 3 Perform Mura compensation on the curved liquid crystal panel according to the plane Mura compensation data obtained in step 2.
  • the camera photographs the curved liquid crystal panel three times or more, and the gray scale of the curved liquid crystal panel display screen is different each time the image is taken, so that the obtained image Mura compensation data is three or more.
  • the gray scale of the screen displayed by the curved liquid crystal panel is selected from a gray interval including 0 gray scale and maximum gray scale, wherein the maximum gray scale is 255 gray scale.
  • the present invention provides a Mura phenomenon compensation method for a curved liquid crystal panel.
  • image Mura compensation data of the curved liquid crystal panel is obtained according to an image acquired by a camera, and the image Mura compensation data includes: Mura compensation value.
  • a position of the compensation point corresponding to the Mura compensation value where the compensation point position is a position of the compensation point in the image collected by the camera, and then correcting the position of the compensation point in the obtained image Mura compensation data, and obtaining the corrected position
  • the position of the compensation point is the position of the compensation point in the plane development view of the curved liquid crystal panel, and the position of the compensation point in the image Mura compensation data is replaced by the corrected compensation point position to obtain the plane of the curved liquid crystal panel.
  • Mura compensates the data, and finally performs Mura compensation on the curved liquid crystal panel according to the plane Mura compensation data, so that the position of the compensation point in the curved liquid crystal panel can be accurately found, and the correct Mura compensation is performed on the curved liquid crystal panel in the curved state.

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  • Theoretical Computer Science (AREA)
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Abstract

一种曲面液晶面板的Mura现象补偿方法，首先根据相机采集到的图像得到所述曲面液晶面板的图像Mura补偿数据，所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置（A），然后对得到的图像Mura补偿数据中的补偿点位置（A）进行修正，获取修正后的补偿点位置（E），用修正后的补偿点位置（E）替换图像Mura补偿数据中的补偿点位置（A）得到曲面液晶面板的平面Mura补偿数据，最后根据平面Mura补偿数据对所述曲面液晶面板进行Mura补偿，从而能够准确找到曲面液晶面板中的补偿点的位置（E），对在曲面状态下的曲面液晶面板进行正确的Mura补偿，提升了曲面液晶面板的产品品质。

Description

曲面液晶面板的Mura现象补偿方法 技术领域
本发明涉及显示技术领域，尤其涉及一种曲面液晶面板的Mura现象补偿方法。
背景技术
随着液晶显示器(Liquid Crystal Display，LCD)向着更轻、更薄、更大的方向发展，因实际制程上的一些不可控因素，使LCD显示面板各处的物理特性存在差异，导致在大于一个像素点的范围内，显示纯灰度图像时亮度不均匀的现象，即业界所称的Mura现象。
Mura现象已经成为制约LCD发展的瓶颈。通过提高工艺水平或者提高原材料纯度等方法可降低Mura现象的发生概率。对于已经制作完成的LCD显示面板，其物理特性已经定型，为了弥补LCD制程上的瑕疵而产生的Mura现象，此时可以通过灰度补偿的方式来校正像素点的亮度，进而改善Mura现象。
灰度补偿是通过改变像素的灰度值来实现亮度均匀性的改善：即通过相机拍摄出灰度画面的Mura状况，然后确定灰度图像中的正常区域和Mura区域，最后根据正常区域的灰度值反向补偿Mura区域的灰度值，在显示纯灰度图像时，对于显示亮度比较高的像素施加较低的灰度值，对于显示亮度比较低的像素，施加较高的灰度值，使得灰度补偿后各像素的亮度接近一致，实现Mura现象的改善。
目前，曲面液晶电视越来越受大众欢迎，但是面板(panel)由平面状态弯折成曲面状态后，其内的液晶会因为受到玻璃弯折应力挤压而出现其它不可预知的Mura(panel平面状态下没有，但是弯折后新增)，所以不能在panel平面状态下进行Mura修复，然后将panel弯折成曲面，唯一的方法只能在曲面panel状态下进行Mura补偿修复；
业界的Mura补偿修复方法都是基于panel为平面状态，如图1所示，因为相机拍摄到的panel在平面状态与曲面状态下的显示面积存在差异，曲面状态下的平面长度b小于平面状态下的平面长度a，所以不能直接使用现有的平面Mura补偿修复方法来计算panel在曲面状态下各区域位置的Mura补偿值，必须开发适合曲面panel的Mura现象补偿方法。
发明内容
本发明的目的在于提供一种曲面液晶面板的Mura现象补偿方法，能够得到曲面液晶面板在曲面状态下的正确的Mura补偿数据，提升曲面液晶面板的产品品质。
为实现上述目的，本发明提供一种曲面液晶面板的Mura现象补偿方法，包括以下步骤：
步骤1、提供一曲面液晶面板及相机，用相机对显示画面的曲面液晶面板进行拍摄，根据采集到的图像得到所述曲面液晶面板的图像Mura补偿数据；
所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置，所述补偿点位置为补偿点在相机采集到的图像中的位置；
步骤2、对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正，获取修正后的补偿点位置，所述修正后的补偿点位置为补偿点在曲面液晶面板的平面展开图中的位置，用修正后的补偿点位置替换图像Mura补偿数据中的补偿点位置得到曲面液晶面板的平面Mura补偿数据；
步骤3、根据步骤2中得到的平面Mura补偿数据对所述曲面液晶面板进行Mura补偿。
所述步骤1中，相机在一固定位置对所述LCD显示面板进行拍摄。
所述步骤1中，相机采集到的图像为平面图像。
相机在所述曲面液晶显示面板的中心点的上方进行拍摄。
所述步骤2中对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正的公式为：
z＝arctan(y/x)πR/180 (1)，
其中，z为补偿点在曲面液晶面板的平面展开图中的位置到该平面展开图中的竖直中心线的距离，y为补偿点在相机采集到的图像中的位置到该图像的竖直中心线的距离，x＝R×cos{arcsin[b/(2R)]}，R为曲面液晶面板在曲面状态时的曲率半径，b为相机采集到的图像的长度。
所述步骤1中相机对所述曲面液晶面板拍摄三次以上，每次拍摄时所述曲面液晶面板显示画面的灰度不同，从而得到的图像Mura补偿数据为三份以上。
所述步骤1中，所述曲面液晶面板所显示画面的灰度选自于包括0灰度和最大灰度在内的灰度区间。
所述最大灰度为255灰度。
本发明还提供一种曲面液晶面板的Mura现象补偿方法，包括以下步 骤：
步骤1、提供一曲面液晶面板及相机，用相机对显示画面的曲面液晶面板进行拍摄，根据采集到的图像得到所述曲面液晶面板的图像Mura补偿数据；
所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置，所述补偿点位置为补偿点在相机采集到的图像中的位置；
步骤2、对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正，获取修正后的补偿点位置，所述修正后的补偿点位置为补偿点在曲面液晶面板的平面展开图中的位置，用修正后的补偿点位置替换图像Mura补偿数据中的补偿点位置得到曲面液晶面板的平面Mura补偿数据；
步骤3、根据步骤2中得到的平面Mura补偿数据对所述曲面液晶面板进行Mura补偿；
其中，所述步骤1中，相机在一固定位置对所述LCD显示面板进行拍摄；
其中，所述步骤1中相机对所述曲面液晶面板拍摄三次以上，每次拍摄时所述曲面液晶面板显示画面的灰度不同，从而得到的图像Mura补偿数据为三份以上。
本发明的有益效果：本发明提供了一种曲面液晶面板的Mura现象补偿方法，首先根据相机采集到的图像得到所述曲面液晶面板的图像Mura补偿数据，所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置，所述补偿点位置为补偿点在相机采集到的图像中的位置，然后对得到的图像Mura补偿数据中的补偿点位置进行修正，获取修正后的补偿点位置，所述修正后的补偿点位置为补偿点在曲面液晶面板的平面展开图中的位置，用修正后的补偿点位置替换图像Mura补偿数据中的补偿点位置得到曲面液晶面板的平面Mura补偿数据，最后根据平面Mura补偿数据对所述曲面液晶面板进行Mura补偿，从而能够准确找到曲面液晶面板中的补偿点的位置，对在曲面状态下的曲面液晶面板进行正确的Mura补偿，提升了曲面液晶面板的产品品质。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为同一液晶面板在平面状态下与曲面状态下由相机拍摄到的对比 图；
图2为本发明的曲面液晶面板的Mura现象补偿方法的流程图；
图3为本发明的曲面液晶面板的Mura现象补偿方法的步骤2的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图2，本发明提供一种曲面液晶面板的Mura现象补偿方法，包括以下步骤：
步骤1、提供一曲面液晶面板及相机，使相机对显示画面的曲面液晶面板进行拍摄，根据采集到的图像得到所述曲面液晶面板的图像Mura补偿数据，所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置，所述补偿点位置为补偿点在相机采集到的图像中的位置；
具体的，所述步骤1中，相机在一固定位置对所述LCD显示面板进行拍摄。优选的，相机在所述曲面液晶显示面板的中心点的上方进行拍摄。
步骤2、对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正，获取修正后的补偿点位置，所述修正后的补偿点位置为补偿点在曲面液晶面板的平面展开图中的位置，用修正后的补偿点位置替换图像Mura补偿数据中的补偿点位置得到曲面液晶面板的平面Mura补偿数据；
具体的，请参阅图3，由于相机拍摄到的图像始终为一个平面，则对于在曲面状态下的曲面液晶面板，如果仍沿用平面状态下的Mura补偿计算方法，Mura补偿系统会将曲面液晶面板上的E点(相机确认为A点)位置的补偿数据放到F点位置(DF弧长等于直线AB的长度)，造成补偿位置错误，所以需要进行正确的位置参数修正；在图3中，B点为相机采集到的图像的长度上的中点，D点为曲面液晶面板的平面展开图的长度上的中点；
进一步地，所述步骤2中对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正的公式为：
z＝arctan(y/x)πR/180 (1)，
其中，z为补偿点在曲面液晶面板的平面展开图中的位置到该平面展开图中的竖直中心线的距离，y为补偿点在相机采集到的图像中的位置到该图像的竖直中心线的距离，x＝R×cos{arcsin[b/(2R)]}，R为曲面液晶面板在曲面状态时的曲率半径，b为相机采集到的图像的长度。
具体地，在图3所示的俯视状态下，曲面液晶面板为一个圆弧形，相 机采集到的图像为该圆弧的弦，E点为补偿点的实际位置，对应在相机采集到的图像中的位置为A点，设该圆弧的半径为R，弦长为b，那么BC＝b/2，则∠BOC＝θ＝arcsin[b/(2R)]，OB＝x＝R*cosθ＝R*cos{arcsin[b/(2R)]}，设AB＝y，则∠AOB＝α＝arctan(y/x)，所以弧长DE＝z＝απR/180＝arctan(y/x)πR/180，其中y为直线AB的长度即补偿点在相机采集到的图像中的位置到该图像的竖直中心线的距离，x＝R*cos{arcsin[b/(2R)]}，即得到弧长DE和直线AB的对应位置关系(以B或者D位置为中心点)。
这样，通过补偿点在相机采集到的图像上的位置找出补偿点在曲面液晶面板在平面展开图中的位置，然后利用该对应关系从而将补偿值还原到正确的位置，从而Mura补偿系统能够对在曲面状态下的曲面液晶面板进行正确的Mura补偿。
步骤3，根据步骤2中得到的平面Mura补偿数据对所述曲面液晶面板进行Mura补偿。
具体的，所述步骤1中相机对所述曲面液晶面板拍摄三次以上，每次拍摄时所述曲面液晶面板显示画面的灰度不同，从而得到的图像Mura补偿数据为三份以上。
具体的，所述步骤1中，所述曲面液晶面板所显示画面的灰度选自于包括0灰度和最大灰度在内的灰度区间，其中，所述最大灰度为255灰度。
综上所述，本发明提供了一种曲面液晶面板的Mura现象补偿方法，首先根据相机采集到的图像得到所述曲面液晶面板的图像Mura补偿数据，所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置，所述补偿点位置为补偿点在相机采集到的图像中的位置，然后对得到的图像Mura补偿数据中的补偿点位置进行修正，获取修正后的补偿点位置，所述修正后的补偿点位置为补偿点在曲面液晶面板的平面展开图中的位置，用修正后的补偿点位置替换图像Mura补偿数据中的补偿点位置得到曲面液晶面板的平面Mura补偿数据，最后根据平面Mura补偿数据对所述曲面液晶面板进行Mura补偿，从而能够准确找到曲面液晶面板中的补偿点的位置，对在曲面状态下的曲面液晶面板进行正确的Mura补偿，提升了曲面液晶面板的产品品质。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (14)

  1. 一种曲面液晶面板的Mura现象补偿方法，包括以下步骤：
    步骤1、提供一曲面液晶面板及相机，用相机对显示画面的曲面液晶面板进行拍摄，根据采集到的图像得到所述曲面液晶面板的图像Mura补偿数据；
    所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置，所述补偿点位置为补偿点在相机采集到的图像中的位置；
    步骤2、对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正，获取修正后的补偿点位置，所述修正后的补偿点位置为补偿点在曲面液晶面板的平面展开图中的位置，用修正后的补偿点位置替换图像Mura补偿数据中的补偿点位置得到曲面液晶面板的平面Mura补偿数据；
    步骤3、根据步骤2中得到的平面Mura补偿数据对所述曲面液晶面板进行Mura补偿。
  2. 如权利要求1所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤1中，相机在一固定位置对所述LCD显示面板进行拍摄。
  3. 如权利要求2所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤1中，相机采集到的图像为平面图像。
  4. 如权利要求2所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤1中，相机在所述曲面液晶显示面板的中心点的上方进行拍摄。
  5. 如权利要求4所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤2中对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正的公式为：
    z＝arctan(y/x)πR/180，
    其中，z为补偿点在曲面液晶面板的平面展开图中的位置到该平面展开图中的竖直中心线的距离，y为补偿点在相机采集到的图像中的位置到该图像的竖直中心线的距离，x＝R×cos{arcsin[b/(2R)]}，R为曲面液晶面板在曲面状态时的曲率半径，b为相机采集到的图像的长度。
  6. 如权利要求1所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤1中相机对所述曲面液晶面板拍摄三次以上，每次拍摄时所述曲面液晶面板显示画面的灰度不同，从而得到的图像Mura补偿数据为三份以上。
  7. 如权利要6所述的曲面液晶面板的Mura现象补偿方法，其中，所 述步骤1中，所述曲面液晶面板所显示画面的灰度选自于包括0灰度和最大灰度在内的灰度区间。
  8. 如权利要求7所述的曲面液晶面板的Mura现象补偿方法，其中，所述最大灰度为255。
  9. 一种曲面液晶面板的Mura现象补偿方法，包括以下步骤：
    步骤1、提供一曲面液晶面板及相机，用相机对显示画面的曲面液晶面板进行拍摄，根据采集到的图像得到所述曲面液晶面板的图像Mura补偿数据；
    所述图像Mura补偿数据包括：Mura补偿值，及该Mura补偿值对应的补偿点位置，所述补偿点位置为补偿点在相机采集到的图像中的位置；
    步骤2、对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正，获取修正后的补偿点位置，所述修正后的补偿点位置为补偿点在曲面液晶面板的平面展开图中的位置，用修正后的补偿点位置替换图像Mura补偿数据中的补偿点位置得到曲面液晶面板的平面Mura补偿数据；
    步骤3、根据步骤2中得到的平面Mura补偿数据对所述曲面液晶面板进行Mura补偿；
    其中，所述步骤1中，相机在一固定位置对所述LCD显示面板进行拍摄；
    其中，所述步骤1中相机对所述曲面液晶面板拍摄三次以上，每次拍摄时所述曲面液晶面板显示画面的灰度不同，从而得到的图像Mura补偿数据为三份以上。
  10. 如权利要求9所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤1中，相机采集到的图像为平面图像。
  11. 如权利要求9所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤1中，相机在所述曲面液晶显示面板的中心点的上方进行拍摄。
  12. 如权利要求11所述的曲面液晶面板的Mura现象补偿方法，其中，所述步骤2中对步骤1得到的图像Mura补偿数据中的补偿点位置进行修正的公式为：
    z＝arctan(y/x)πR/180，
    其中，z为补偿点在曲面液晶面板的平面展开图中的位置到该平面展开图中的竖直中心线的距离，y为补偿点在相机采集到的图像中的位置到该图像的竖直中心线的距离，x＝R×cos{arcsin[b/(2R)]}，R为曲面液晶面板在曲面状态时的曲率半径，b为相机采集到的图像的长度。
  13. 如权利要9所述的曲面液晶面板的Mura现象补偿方法，其中，所 述步骤1中，所述曲面液晶面板所显示画面的灰度选自于包括0灰度和最大灰度在内的灰度区间。
  14. 如权利要求13所述的曲面液晶面板的Mura现象补偿方法，其中，所述最大灰度为255。
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