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WO2017152457A1 - Mura phenomenon compensation method - Google Patents

Mura phenomenon compensation method Download PDF

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Publication number
WO2017152457A1
WO2017152457A1 PCT/CN2016/078883 CN2016078883W WO2017152457A1 WO 2017152457 A1 WO2017152457 A1 WO 2017152457A1 CN 2016078883 W CN2016078883 W CN 2016078883W WO 2017152457 A1 WO2017152457 A1 WO 2017152457A1
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WIPO (PCT)
Prior art keywords
display panel
lcd display
brightness
data
mura
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Ceased
Application number
PCT/CN2016/078883
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French (fr)
Chinese (zh)
Inventor
张华�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to KR1020187029201A priority Critical patent/KR102118613B1/en
Priority to JP2018547404A priority patent/JP6719579B2/en
Publication of WO2017152457A1 publication Critical patent/WO2017152457A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/34—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
    • G09G3/20—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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • 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
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a Mura phenomenon compensation method.
  • LCD liquid crystal display
  • some physical factors on the LCD display panel are different due to some uncontrollable factors in the actual process, resulting in greater than In the range of one pixel, 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 camera since the camera is shooting at the center of the LCD panel, the camera forms a viewing angle with the area around the panel, and the panel is made by the liquid crystal molecules deflecting the light transmission principle. From the perspective, the brightness of the surrounding area of the panel is different. Under low gray level, the brightness under the side view angle is higher than the brightness under the front view angle, which results in the brightness of the panel obtained when the camera is shot is higher than the actual positive angle. Brightness, then Mura compensation according to the Mura compensation algorithm, as shown in Figure 3, will make the positive viewing angle of the area around the panel low; in high gray, as shown in Figure 4, the situation is just the opposite; thus affecting The product quality of the LCD display panel.
  • the object of the present invention is to provide a Mura phenomenon compensation method, which can correct the influence of the camera angle of view on the Mura compensation effect and improve the product quality of the LCD display panel.
  • the present invention provides a Mura phenomenon compensation method, comprising the following steps:
  • Step 1 Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data;
  • Step 2 The center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system.
  • the length and the width direction of the LCD display panel are respectively an X axis and a Y axis, and a direction perpendicular to the LCD display panel is a Z axis.
  • Step 3 using the brightness correction coefficient formula combined with the coordinate values of the positions on the LCD display panel in the Cartesian coordinate system, and calculating the brightness correction coefficient of each position on the LCD display panel;
  • Step 4 correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data
  • Step 5 obtaining Mura compensation data according to the corrected brightness data
  • Step 6 Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5.
  • the formula of the brightness correction coefficient obtained in the step 2 is the following formula (1):
  • Z is the brightness correction coefficient
  • x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system
  • y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system
  • a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed;
  • the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
  • the camera in the step 1 captures the LCD display panel three times, and the gray scales of the display screen of the LCD display panel are different when the three shots are taken, respectively, the first, second, and third gray scales, thereby obtaining the obtained
  • the luminance data is three copies, which are first, second, and third luminance data, respectively, and respectively correspond to the display screens of the first, second, and third gray scales.
  • the first, second, and third brightness data are respectively corrected, respectively Obtaining the first, second, and third corrected brightness data, and respectively obtaining the first, second, and third Mura compensation data, wherein the first, second, and third brightness data are corrected and respectively
  • the values of b in equation (1) include positive and negative numbers.
  • the Mura compensation under the first, second, and third gray levels is performed on the LCD display panel by using the first, second, and third Mura compensation data.
  • the camera captures the LCD display panel three times or more, and the gray scale of the display screen of the LCD display panel is different each time, so that the obtained brightness data is three or more.
  • M is the Mura compensation data for the specific position
  • d is the normal brightness of the LCD display panel
  • e is the conversion factor between the brightness and the gray level of the LCD display panel.
  • the normal brightness of the LCD display panel is the brightness of the center point of the LCD display panel collected in step 1.
  • the invention also provides a Mura phenomenon compensation method, comprising the following steps:
  • Step 1 Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data;
  • Step 2 The center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system.
  • the length and the width direction of the LCD display panel are respectively an X axis and a Y axis, and a direction perpendicular to the LCD display panel is a Z axis.
  • Step 3 using the brightness correction coefficient formula combined with the coordinate values of the positions on the LCD display panel in the Cartesian coordinate system, and calculating the brightness correction coefficient of each position on the LCD display panel;
  • Step 4 correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data
  • Step 5 obtaining Mura compensation data according to the corrected brightness data
  • Step 6 Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5;
  • the formula of the brightness correction coefficient obtained in the step 2 is:
  • Z is the brightness correction coefficient
  • x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system
  • y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system
  • a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed;
  • the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
  • the brightness correction coefficient, C1 is the brightness value of the specific position after correction.
  • the invention provides a Mura phenomenon compensation method, which uses the brightness correction coefficient formula to calculate the brightness correction coefficient of each position on the LCD display panel, thereby shooting according to the calculated brightness correction coefficient pair through the camera.
  • the obtained LCD display panel is corrected for the brightness data under different gray levels to obtain the corrected brightness data, and then the Mura compensation data is obtained according to the corrected brightness data, and finally the Mura compensation is performed on the LCD display panel by using the Mura compensation data. , thereby correcting the adverse effect on the Mura compensation effect due to the camera viewing angle, and improving the product quality of the LCD display panel.
  • FIG. 1 is a schematic diagram of a camera photographing an LCD display panel at different positions
  • FIG. 2 is a schematic diagram showing the relationship between brightness and gray scale of an LCD display panel under different viewing angles
  • FIG. 3 is a comparison diagram of luminances captured by a camera in a low gray level and before and after Mura compensation in the prior art
  • FIG. 4 is a comparison diagram of luminances captured by a camera and a brightness before and after Mura compensation in a high-gradation LCD display panel of the prior art
  • FIG. 5 is a flow chart of a method for compensating for a Mura phenomenon according to the present invention.
  • FIG. 6 is a schematic diagram showing a curve of a brightness correction coefficient obtained in step 2 of the Mura phenomenon compensation method of the present invention.
  • the present invention provides a Mura phenomenon compensation method, which includes the following steps:
  • Step 1 Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data.
  • the brightness data of the LCD display panel collected at this time may be deviated from the actual display brightness of the LCD display panel due to different angles of view of the camera on the LCD display panel, and the LCD display panel may be different for different display gray levels. The deviation at the same position is also different.
  • the brightness of the LCD display panel collected by the lower grayscale image is greater than the actual display brightness of the LCD display panel.
  • the brightness data of the collected LCD display panel will be smaller than the actual display brightness of the LCD display panel.
  • Step 2 referring to FIG. 6, the center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system.
  • the length and width directions of the LCD display panel are respectively an X-axis and a Y-axis, which are perpendicular to the LCD display panel.
  • the direction is the Z axis, and a brightness correction coefficient formula is obtained in combination with the Cartesian coordinate system.
  • the formula of the brightness correction coefficient obtained in the step 2 is the following formula (1):
  • Z is the brightness correction coefficient
  • x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system
  • y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system
  • a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed;
  • the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
  • Step 3 Using the brightness correction coefficient formula, the brightness correction coefficient of each position on the LCD display panel is calculated.
  • Step 4 Correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data.
  • the brightness correction coefficient, C1 is the brightness value of the specific position after correction.
  • Step 5 Obtain the Mura compensation data according to the corrected brightness data.
  • M is the Mura compensation data for the specific position
  • d is the normal brightness of the LCD display panel
  • e is the conversion factor between the brightness and the gray level of the LCD display panel.
  • the normal brightness of the LCD display panel is the brightness of the center point of the LCD display panel collected in step 1.
  • a suitable coefficient b can be selected according to the viewing angle characteristics of each gray level of the LCD display panel. For example, the gray scale of the screen displayed by the LCD display panel is low. Under the low gray level, the LCD display panel is The brightness under the side viewing angle is higher than the brightness in the positive viewing angle (ie, the brightness data of the LCD display panel collected under the side viewing angle is greater than the real display brightness of the LCD display panel), then the coefficient b ranges from As shown in FIG. 6, since b is greater than or equal to 0, the luminance correction coefficient Z obtained by the formula (1) is less than 1, for example, the selection b is 0.2, and b is 0.2 into the luminance coefficient compensation formula, which can be obtained.
  • the value of the brightness C1 corrected by the left and right ends of the LCD display panel is 0.8c, and the conversion coefficient e between the brightness and the gray level of the LCD display panel and the normal brightness d of the LCD display panel are combined.
  • Obtaining the Mura compensation value at the left and right end points of the LCD display panel is (0.8*cd)/e. Since the Mura compensation value is obtained according to the corrected brightness C1, the corrected brightness value 0.8c is higher than the corrected brightness.
  • the value c is reduced by 0.2c, thereby solving the problem that the conventional Mura compensation data algorithm causes the gray value of the surrounding area to be excessively lowered to cause the brightness of the surrounding area of the LCD display panel to be low.
  • the brightness of the LCD display panel under the side view angle is lower than the brightness under the positive viewing angle (ie, the LCD display panel collected under the side view angle)
  • the brightness data is smaller than the real display brightness of the LCD display panel.
  • the above formula of the brightness coefficient (1) is also applicable.
  • the value of the coefficient b is in the range of The obtained brightness compensation coefficient is greater than 1, to solve the problem that the conventional Mura compensation data algorithm excessively increases the gray value of the surrounding area and causes the brightness of the surrounding area of the LCD display panel to be high.
  • Step 6 Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5.
  • the camera in the step 1 can capture the LCD display panel three times, and the gray scales of the display screen of the LCD display panel are different when the three shots are taken, respectively, the first, second, and third gray scales.
  • the obtained brightness data is three, which are first, second, and third, respectively.
  • the brightness data is respectively corresponding to the display screens of the first, second, and third gray levels; in the step 2 to step 5, the first, second, and third brightness data are respectively corrected, respectively First, second, and third corrected luminance data, and respectively obtaining first, second, and third Mura compensation data; then, in step 3, using first, second, and third Mura compensation Data performing Mura compensation on the first, second, and third gray levels on the LCD display panel; wherein, for the first, second, and third gray levels, the first and second In the three calculations performed separately with the correction of the third luminance data, it is preferable that the value of b in the formula (1) includes a positive number and a negative number, that is, the first, second, and third gray levels are included. Grayscale and low grayscale.
  • the camera in the step 1 may also capture the LCD display panel three times or more, and the gray scale of the display screen of the LCD display panel is different each time, so that the obtained brightness data is three or more.
  • the Mura phenomenon compensation method of the present invention calculates the brightness correction coefficient of each position on the LCD display panel by using the brightness correction coefficient formula, thereby displaying the brightness of the LCD image obtained by the camera according to the calculated brightness correction coefficient.
  • the brightness data of the panel is corrected under different gray levels to obtain the corrected brightness data, and then the Mura compensation data is obtained according to the corrected brightness data, and finally the Mura compensation is performed on the LCD display panel by using the Mura compensation data, thereby correcting
  • the effect of the camera's viewing angle on the Mura compensation effect improves the product quality of the LCD display panel.

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Abstract

A Mura phenomenon compensation method. The method comprises: calculating a brightness correction coefficient of each position on an LCD display panel using a brightness correction coefficient formula, thereby correcting brightness data, photographed by a camera, of the LDC display panel at different grey scales according to the calculated brightness correction coefficient, so as to obtain the corrected brightness data; then, obtaining Mura compensation data according to the corrected brightness data; and finally performing Mura compensation on the LCD display panel using the Mura compensation data. Therefore, an adverse effect on the Mura compensation effect caused by a photographing angle of the camera is prevented, and the product quality of the LCD display panel is improved.

Description

Mura现象补偿方法Mura phenomenon compensation method 技术领域Technical field

本发明涉及显示技术领域，尤其涉及一种Mura现象补偿方法。The present invention relates to the field of display technologies, and in particular, to a Mura phenomenon compensation method.

背景技术Background technique

随着液晶显示器(Liquid Crystal Display，LCD)显示器向着更轻、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。As liquid crystal display (LCD) displays are moving toward lighter, thinner, and larger directions, some physical factors on the LCD display panel are different due to some uncontrollable factors in the actual process, resulting in greater than In the range of one pixel, the phenomenon of uneven brightness when displaying a pure gray image is known as the Mura phenomenon in the industry.

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。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. For the LCD display panel that has been completed, the physical characteristics have been finalized. In order to compensate for the Mura phenomenon generated by the flaw in the LCD process, the brightness of the pixel can be corrected by the gray compensation method, thereby improving the Mura phenomenon.

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。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.

如图1-2所示，由于相机正对着LCD显示面板(panel)中心位置进行拍摄，相机与panel四周区域形成一个视角，而panel是由液晶分子偏转透光原理而制成，在不同的视角下，panel周边区域呈现的亮度不同，在低灰度下，侧视角度下的亮度要高于正视角度下的亮度，这样导致相机拍摄时得到的panel周边亮度要高于实际正视角时的亮度，那么根据Mura补偿算法进行Mura补偿后，如图3所示，会使得panel四周区域的正视角亮度偏低；在高灰度下，如图4所示，则情况刚好相反；从而影响了LCD显示面板的产品品质。As shown in Figure 1-2, since the camera is shooting at the center of the LCD panel, the camera forms a viewing angle with the area around the panel, and the panel is made by the liquid crystal molecules deflecting the light transmission principle. From the perspective, the brightness of the surrounding area of the panel is different. Under low gray level, the brightness under the side view angle is higher than the brightness under the front view angle, which results in the brightness of the panel obtained when the camera is shot is higher than the actual positive angle. Brightness, then Mura compensation according to the Mura compensation algorithm, as shown in Figure 3, will make the positive viewing angle of the area around the panel low; in high gray, as shown in Figure 4, the situation is just the opposite; thus affecting The product quality of the LCD display panel.

发明内容Summary of the invention

本发明的目的在于提供一种Mura现象补偿方法，修正相机视角对Mura补偿效果产生的影响，提高LCD显示面板的产品品质。 The object of the present invention is to provide a Mura phenomenon compensation method, which can correct the influence of the camera angle of view on the Mura compensation effect and improve the product quality of the LCD display panel.

为实现上述目的，本发明提供一种Mura现象补偿方法，包括以下步骤：To achieve the above object, the present invention provides a Mura phenomenon compensation method, comprising the following steps:

步骤1、提供一LCD显示面板和相机，在LCD显示面板的中心点的正上方用所述相机对显示一定灰度画面的LCD显示面板拍照，通过采集到的图像得到所述LCD显示面板的亮度数据；Step 1. Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data;

步骤2、将LCD显示面板的中心点作为坐标原点建立一个直角坐标系，所述LCD显示面板的长度、宽度方向分别为X轴、Y轴，垂直于所述LCD显示面板的方向为Z轴，结合直角坐标系得到一亮度校正系数公式；Step 2: The center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system. The length and the width direction of the LCD display panel are respectively an X axis and a Y axis, and a direction perpendicular to the LCD display panel is a Z axis. Combining a Cartesian coordinate system to obtain a brightness correction coefficient formula;

步骤3、利用该亮度校正系数公式结合LCD显示面板上各位置在直角坐标系中的坐标值，计算得出LCD显示面板上各位置的亮度校正系数；Step 3, using the brightness correction coefficient formula combined with the coordinate values of the positions on the LCD display panel in the Cartesian coordinate system, and calculating the brightness correction coefficient of each position on the LCD display panel;

步骤4、根据计算得出的亮度校正系数对亮度数据进行校正，得到校正后的亮度数据；Step 4: correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data;

步骤5、根据校正后的亮度数据得到Mura补偿数据；Step 5: obtaining Mura compensation data according to the corrected brightness data;

步骤6、利用步骤5中获得的Mura补偿数据对所述LCD显示面板进行Mura补偿。Step 6. Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5.

所述步骤2中得到的亮度校正系数公式为以下公式(1)：The formula of the brightness correction coefficient obtained in the step 2 is the following formula (1):

Figure PCTCN2016078883-appb-000001
Figure PCTCN2016078883-appb-000001

其中，Z为亮度校正系数，x为所述LCD显示面板上某一位置在直角坐标系中的X轴坐标值，y为所述LCD显示面板上某一位置在直角坐标系中的Y轴坐标值，b为一个与所述相机拍摄时所述LCD显示面板显示的画面灰度有关的系数；Where Z is the brightness correction coefficient, x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system, and y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed;

在所述直角坐标系中，X轴和Y轴均以所述LCD显示面板的长度的一半为1个单位，x的取值范围为[-1，1]，y的取值范围为[-a，a]，a为LCD显示面板的宽度与长度的比值，b的取值范围为

Figure PCTCN2016078883-appb-000002
In the Cartesian coordinate system, the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
Figure PCTCN2016078883-appb-000002

所述步骤4中对亮度数据进行校正所采用的公式为：C1＝C2×Z；其中，C2步骤1中采集到的LCD显示面板上一特定位置的亮度值，Z为该特定位置的亮度校正系数，C1为校正后该特定位置的亮度值。The formula for correcting the brightness data in the step 4 is: C1=C2×Z; wherein, the brightness value of a specific position on the LCD display panel collected in step C2 of C2, and Z is the brightness correction of the specific position. Coefficient, C1 is the brightness value of the specific position after correction.

所述步骤1中所述相机对所述LCD显示面板拍摄三次，三次拍摄时所述LCD显示面板显示画面的灰度不同，分别为第一、第二、和第三灰度，从而所得到的亮度数据为三份，分别为第一、第二、和第三亮度数据，并分别对应所述第一、第二、和第三灰度的显示画面。The camera in the step 1 captures the LCD display panel three times, and the gray scales of the display screen of the LCD display panel are different when the three shots are taken, respectively, the first, second, and third gray scales, thereby obtaining the obtained The luminance data is three copies, which are first, second, and third luminance data, respectively, and respectively correspond to the display screens of the first, second, and third gray scales.

所述步骤2-5中，对第一、第二、和第三亮度数据分别进行校正，分别 得到第一、第二、和第三校正后的亮度数据，并分别得到第一、第二、和第三Mura补偿数据，其中，对第一、第二、和第三亮度数据进行校正而分别进行的三次计算过程中，对公式(1)中b的取值包括正数和负数。In the step 2-5, the first, second, and third brightness data are respectively corrected, respectively Obtaining the first, second, and third corrected brightness data, and respectively obtaining the first, second, and third Mura compensation data, wherein the first, second, and third brightness data are corrected and respectively In the three calculations performed, the values of b in equation (1) include positive and negative numbers.

所述步骤6中，利用第一、第二、第三Mura补偿数据对所述LCD显示面板分别进行在第一、第二、第三灰度下的Mura补偿。In the step 6, the Mura compensation under the first, second, and third gray levels is performed on the LCD display panel by using the first, second, and third Mura compensation data.

所述步骤1中所述相机对所述LCD显示面板拍摄三次以上，每次拍摄时所述LCD显示面板显示画面的灰度不同，从而得到的亮度数据为三份以上。In the step 1, the camera captures the LCD display panel three times or more, and the gray scale of the display screen of the LCD display panel is different each time, so that the obtained brightness data is three or more.

所述步骤5中计算Mura补偿数据的公式为：M＝(C1-d)/e；The formula for calculating the Mura compensation data in the step 5 is: M=(C1-d)/e;

其中，M为该特定位置的Mura补偿数据，d为所述LCD显示面板的正常亮度，e为LCD显示面板的亮度与灰度之间的换算系数。Where M is the Mura compensation data for the specific position, d is the normal brightness of the LCD display panel, and e is the conversion factor between the brightness and the gray level of the LCD display panel.

所述LCD显示面板的正常亮度为步骤1中采集到的LCD显示面板的中心点的亮度。The normal brightness of the LCD display panel is the brightness of the center point of the LCD display panel collected in step 1.

本发明还提供一种Mura现象补偿方法，包括以下步骤：The invention also provides a Mura phenomenon compensation method, comprising the following steps:

步骤1、提供一LCD显示面板和相机，在LCD显示面板的中心点的正上方用所述相机对显示一定灰度画面的LCD显示面板拍照，通过采集到的图像得到所述LCD显示面板的亮度数据；Step 1. Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data;

步骤2、将LCD显示面板的中心点作为坐标原点建立一个直角坐标系，所述LCD显示面板的长度、宽度方向分别为X轴、Y轴，垂直于所述LCD显示面板的方向为Z轴，结合直角坐标系得到一亮度校正系数公式；Step 2: The center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system. The length and the width direction of the LCD display panel are respectively an X axis and a Y axis, and a direction perpendicular to the LCD display panel is a Z axis. Combining a Cartesian coordinate system to obtain a brightness correction coefficient formula;

步骤3、利用该亮度校正系数公式结合LCD显示面板上各位置在直角坐标系中的坐标值，计算得出LCD显示面板上各位置的亮度校正系数；Step 3, using the brightness correction coefficient formula combined with the coordinate values of the positions on the LCD display panel in the Cartesian coordinate system, and calculating the brightness correction coefficient of each position on the LCD display panel;

步骤4、根据计算得出的亮度校正系数对亮度数据进行校正，得到校正后的亮度数据；Step 4: correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data;

步骤5、根据校正后的亮度数据得到Mura补偿数据；Step 5: obtaining Mura compensation data according to the corrected brightness data;

步骤6、利用步骤5中获得的Mura补偿数据对所述LCD显示面板进行Mura补偿；Step 6. Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5;

其中，所述步骤2中得到的亮度校正系数公式为：Wherein, the formula of the brightness correction coefficient obtained in the step 2 is:

Figure PCTCN2016078883-appb-000003
Figure PCTCN2016078883-appb-000003

其中，Z为亮度校正系数，x为所述LCD显示面板上某一位置在直角坐标系中的X轴坐标值，y为所述LCD显示面板上某一位置在直角坐标系中的Y轴坐标值，b为一个与所述相机拍摄时所述LCD显示面板显示的画面灰度有关的系数； Where Z is the brightness correction coefficient, x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system, and y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed;

在所述直角坐标系中，X轴和Y轴均以所述LCD显示面板的长度的一半为1个单位，x的取值范围为[-1，1]，y的取值范围为[-a，a]，a为LCD显示面板的宽度与长度的比值，b的取值范围为

Figure PCTCN2016078883-appb-000004
In the Cartesian coordinate system, the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
Figure PCTCN2016078883-appb-000004

其中，所述步骤4中对亮度数据进行校正所采用的公式为：C1＝C2×Z；其中，C2步骤1中采集到的LCD显示面板上一特定位置的亮度值，Z为该特定位置的亮度校正系数，C1为校正后该特定位置的亮度值。The formula used for correcting the brightness data in the step 4 is: C1=C2×Z; wherein, the brightness value of a specific position on the LCD display panel collected in step C1 of C2, Z is the specific position The brightness correction coefficient, C1 is the brightness value of the specific position after correction.

本发明的有益效果：本发明提供了一种Mura现象补偿方法，利用亮度校正系数公式，计算得出LCD显示面板上各位置的亮度校正系数，从而根据计算得出的亮度校正系数对通过相机拍摄得到的LCD显示面板在不同灰度下的亮度数据进行校正，从而得到校正后的亮度数据，进而根据校正后的亮度数据得到Mura补偿数据，最后利用Mura补偿数据对所述LCD显示面板进行Mura补偿，从而修正了因相机拍摄视角而对Mura补偿效果产生的不良影响，提高了LCD显示面板的产品品质。The invention provides a Mura phenomenon compensation method, which uses the brightness correction coefficient formula to calculate the brightness correction coefficient of each position on the LCD display panel, thereby shooting according to the calculated brightness correction coefficient pair through the camera. The obtained LCD display panel is corrected for the brightness data under different gray levels to obtain the corrected brightness data, and then the Mura compensation data is obtained according to the corrected brightness data, and finally the Mura compensation is performed on the LCD display panel by using the Mura compensation data. , thereby correcting the adverse effect on the Mura compensation effect due to the camera viewing angle, and improving the product quality of the LCD display panel.

附图说明DRAWINGS

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。The technical solutions and other advantageous effects of the present invention will be apparent from the following detailed description of the embodiments of the invention.

附图中，In the drawings,

图1为相机在不同位置对LCD显示面板进行拍摄的示意图；1 is a schematic diagram of a camera photographing an LCD display panel at different positions;

图2为不同视角下LCD显示面板的亮度与灰度的关系示意图；2 is a schematic diagram showing the relationship between brightness and gray scale of an LCD display panel under different viewing angles;

图3为现有技术中LCD显示面板在低灰度下相机拍摄到的亮度与Mura补偿前后的亮度对比图；3 is a comparison diagram of luminances captured by a camera in a low gray level and before and after Mura compensation in the prior art;

图4为现有技术中LCD显示面板在高灰度下相机拍摄到的亮度与Mura补偿前后的亮度对比图；4 is a comparison diagram of luminances captured by a camera and a brightness before and after Mura compensation in a high-gradation LCD display panel of the prior art;

图5为本发明的Mura现象补偿方法的流程图；5 is a flow chart of a method for compensating for a Mura phenomenon according to the present invention;

图6为本发明的Mura现象补偿方法的步骤2中所得到的一亮度校正系数公式的曲线示意图。FIG. 6 is a schematic diagram showing a curve of a brightness correction coefficient obtained in step 2 of the Mura phenomenon compensation method of the present invention.

具体实施方式detailed description

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。In order to further clarify the technical means and effects of the present invention, the following detailed description will be made in conjunction with the preferred embodiments of the invention and the accompanying drawings.

请参阅图5，本发明提供一种Mura现象补偿方法，包括以下步骤： Referring to FIG. 5, the present invention provides a Mura phenomenon compensation method, which includes the following steps:

步骤1、提供一LCD显示面板和相机，在LCD显示面板的中心点的正上方用所述相机对显示一定灰度画面的LCD显示面板拍照，通过采集到的图像得到所述LCD显示面板的亮度数据。Step 1. Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data.

具体的，此时采集到的LCD显示面板的亮度数据，会因相机对LCD显示面板上各位置拍摄视角的不同与LCD显示面板的真实显示亮度产生偏差，对于不同的显示灰度，LCD显示面板上同一位置处的偏差也不相同，通常灰度较低的画面采集到的LCD显示面板的亮度数据大于LCD显示面板的真实显示亮度，随着灰度的不断提升，在达到一临界值时，采集到的LCD显示面板的亮度数据又会小于LCD显示面板的真实显示亮度。Specifically, the brightness data of the LCD display panel collected at this time may be deviated from the actual display brightness of the LCD display panel due to different angles of view of the camera on the LCD display panel, and the LCD display panel may be different for different display gray levels. The deviation at the same position is also different. Generally, the brightness of the LCD display panel collected by the lower grayscale image is greater than the actual display brightness of the LCD display panel. As the grayscale continues to increase, when a critical value is reached, The brightness data of the collected LCD display panel will be smaller than the actual display brightness of the LCD display panel.

步骤2、请参阅图6，将LCD显示面板的中心点作为坐标原点建立一个直角坐标系，所述LCD显示面板的长度、宽度方向分别为X轴、Y轴，垂直于所述LCD显示面板的方向为Z轴，结合直角坐标系得到一亮度校正系数公式。Step 2, referring to FIG. 6, the center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system. The length and width directions of the LCD display panel are respectively an X-axis and a Y-axis, which are perpendicular to the LCD display panel. The direction is the Z axis, and a brightness correction coefficient formula is obtained in combination with the Cartesian coordinate system.

具体地，所述步骤2中得到的亮度校正系数公式为以下公式(1)：Specifically, the formula of the brightness correction coefficient obtained in the step 2 is the following formula (1):

Figure PCTCN2016078883-appb-000005
Figure PCTCN2016078883-appb-000005

其中，Z为亮度校正系数，x为所述LCD显示面板上某一位置在直角坐标系中的X轴坐标值，y为所述LCD显示面板上某一位置在直角坐标系中的Y轴坐标值，b为一个与所述相机拍摄时所述LCD显示面板显示的画面灰度有关的系数；Where Z is the brightness correction coefficient, x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system, and y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed;

在所述直角坐标系中，X轴和Y轴均以所述LCD显示面板的长度的一半为1个单位，x的取值范围为[-1，1]，y的取值范围为[-a，a]，a为LCD显示面板的宽度与长度的比值，b的取值范围为

Figure PCTCN2016078883-appb-000006
In the Cartesian coordinate system, the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
Figure PCTCN2016078883-appb-000006

步骤3、利用该亮度校正系数公式，计算得出LCD显示面板上各位置的亮度校正系数。Step 3: Using the brightness correction coefficient formula, the brightness correction coefficient of each position on the LCD display panel is calculated.

步骤4、根据计算得出的亮度校正系数对亮度数据进行校正，得到校正后的亮度数据。Step 4: Correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data.

具体地，所述步骤4中对亮度数据进行校正所采用的公式为：C1＝C2×Z；其中，C2步骤1中采集到的LCD显示面板上一特定位置的亮度值，Z为该特定位置的亮度校正系数，C1为校正后该特定位置的亮度值。Specifically, the formula for correcting the brightness data in the step 4 is: C1=C2×Z; wherein, the brightness value of a specific position on the LCD display panel collected in step C2 of C2, Z is the specific position. The brightness correction coefficient, C1 is the brightness value of the specific position after correction.

步骤5、根据校正后的亮度数据得到Mura补偿数据。Step 5. Obtain the Mura compensation data according to the corrected brightness data.

具体地，所述步骤5中计算Mura补偿数据的公式为：M＝(C1-d)/e； Specifically, the formula for calculating the Mura compensation data in the step 5 is: M=(C1-d)/e;

其中，M为该特定位置的Mura补偿数据，d为所述LCD显示面板的正常亮度，e为LCD显示面板的亮度与灰度之间的换算系数。Where M is the Mura compensation data for the specific position, d is the normal brightness of the LCD display panel, and e is the conversion factor between the brightness and the gray level of the LCD display panel.

所述LCD显示面板的正常亮度为步骤1中采集到的LCD显示面板的中心点的亮度。The normal brightness of the LCD display panel is the brightness of the center point of the LCD display panel collected in step 1.

具体的，计算过程中，可根据LCD显示面板各灰度下的视角特性，选择适合的系数b，例如，LCD显示面板显示的画面灰度较低，在该低灰度下，LCD显示面板在侧视角下的亮度高于正视角下的亮度(即在侧视角下采集到的LCD显示面板的亮度数据大于LCD显示面板的真实显示亮度)，那么此时，系数b取值范围为

Figure PCTCN2016078883-appb-000007
如图6所示，由于b大于等于0，由公式(1)得到的亮度校正系数Z均小于1，例如：选择b为0.2，此时将b为0.2带入亮度系数补偿公式中，可以得出LCD显示面板左、右两端点(x＝±1，y＝0)的补偿系数为0.8，再将采集到的LCD显示面板左、右两端点的亮度C2的值c乘以补偿系数0.8，即可获得LCD显示面板左、右两端点校正后的亮度C1的值为0.8c，再结合所述LCD显示面板的亮度与灰度之间换算系数e和所述LCD显示面板的正常亮度d，得到LCD显示面板左、右两端点处的Mura补偿值为(0.8*c-d)/e，由于该Mura补偿值是根据校正后的亮度C1得到，校正后的亮度的值0.8c较校正前的亮度的值c减小了0.2c，从而解决了传统的Mura补偿数据算法使四周区域的灰度值过度降低而导致LCD显示面板的四周区域的亮度偏低的问题。Specifically, in the calculation process, a suitable coefficient b can be selected according to the viewing angle characteristics of each gray level of the LCD display panel. For example, the gray scale of the screen displayed by the LCD display panel is low. Under the low gray level, the LCD display panel is The brightness under the side viewing angle is higher than the brightness in the positive viewing angle (ie, the brightness data of the LCD display panel collected under the side viewing angle is greater than the real display brightness of the LCD display panel), then the coefficient b ranges from
Figure PCTCN2016078883-appb-000007
As shown in FIG. 6, since b is greater than or equal to 0, the luminance correction coefficient Z obtained by the formula (1) is less than 1, for example, the selection b is 0.2, and b is 0.2 into the luminance coefficient compensation formula, which can be obtained. The compensation coefficient of the left and right end points of the LCD display panel (x=±1, y=0) is 0.8, and the value c of the brightness C2 of the left and right end points of the collected LCD display panel is multiplied by a compensation coefficient of 0.8. The value of the brightness C1 corrected by the left and right ends of the LCD display panel is 0.8c, and the conversion coefficient e between the brightness and the gray level of the LCD display panel and the normal brightness d of the LCD display panel are combined. Obtaining the Mura compensation value at the left and right end points of the LCD display panel is (0.8*cd)/e. Since the Mura compensation value is obtained according to the corrected brightness C1, the corrected brightness value 0.8c is higher than the corrected brightness. The value c is reduced by 0.2c, thereby solving the problem that the conventional Mura compensation data algorithm causes the gray value of the surrounding area to be excessively lowered to cause the brightness of the surrounding area of the LCD display panel to be low.

同理，当LCD显示面板显示的画面灰度较高，在该高灰度下，LCD显示面板在侧视角下的亮度低于正视角下的亮度(即侧视角下采集到的LCD显示面板的亮度数据小于LCD显示面板的真实显示亮度)，上述亮度系数公式(1)同样适用，此时，系数b的取值范围为

Figure PCTCN2016078883-appb-000008
得到的亮度补偿系数大于1，以解决传统的Mura补偿数据算法使四周区域的灰度值过度增加而导致LCD显示面板的四周区域的亮度偏高的问题。Similarly, when the gray scale of the screen displayed by the LCD display panel is high, the brightness of the LCD display panel under the side view angle is lower than the brightness under the positive viewing angle (ie, the LCD display panel collected under the side view angle) The brightness data is smaller than the real display brightness of the LCD display panel. The above formula of the brightness coefficient (1) is also applicable. At this time, the value of the coefficient b is in the range of
Figure PCTCN2016078883-appb-000008
The obtained brightness compensation coefficient is greater than 1, to solve the problem that the conventional Mura compensation data algorithm excessively increases the gray value of the surrounding area and causes the brightness of the surrounding area of the LCD display panel to be high.

步骤6、利用步骤5中得到的Mura补偿数据对所述LCD显示面板进行Mura补偿。Step 6. Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5.

具体的，所述步骤1中所述相机对所述LCD显示面板可以拍摄三次，三次拍摄时所述LCD显示面板显示画面的灰度不同，分别为第一、第二、和第三灰度，从而所得到的亮度数据为三份，分别为第一、第二、和第三 亮度数据，并分别对应所述第一、第二、和第三灰度的显示画面；所述步骤2-步骤5中，对第一、第二、和第三亮度数据分别进行校正，分别得到第一、第二、和第三校正后的亮度数据，并分别得到第一、第二、和第三Mura补偿数据；则所述步骤3中，利用第一、第二、和第三Mura补偿数据对所述LCD显示面板分别进行在第一、第二、和第三灰度下的Mura补偿；其中，对于第一、第二、和第三灰度的选择，以对第一、第二、和第三亮度数据进行校正而分别进行的三次计算过程中，对公式(1)中b的取值包括正数和负数为优选，即第一、第二、和第三灰度中包括高灰度和低灰度。Specifically, the camera in the step 1 can capture the LCD display panel three times, and the gray scales of the display screen of the LCD display panel are different when the three shots are taken, respectively, the first, second, and third gray scales. Thus, the obtained brightness data is three, which are first, second, and third, respectively. The brightness data is respectively corresponding to the display screens of the first, second, and third gray levels; in the step 2 to step 5, the first, second, and third brightness data are respectively corrected, respectively First, second, and third corrected luminance data, and respectively obtaining first, second, and third Mura compensation data; then, in step 3, using first, second, and third Mura compensation Data performing Mura compensation on the first, second, and third gray levels on the LCD display panel; wherein, for the first, second, and third gray levels, the first and second In the three calculations performed separately with the correction of the third luminance data, it is preferable that the value of b in the formula (1) includes a positive number and a negative number, that is, the first, second, and third gray levels are included. Grayscale and low grayscale.

具体的，所述步骤1中所述相机对所述LCD显示面板拍摄也可以为三次以上，每次拍摄时所述LCD显示面板显示画面的灰度不同，从而得到的亮度数据为三份以上。Specifically, the camera in the step 1 may also capture the LCD display panel three times or more, and the gray scale of the display screen of the LCD display panel is different each time, so that the obtained brightness data is three or more.

综上所述，本发明的Mura现象补偿方法，利用亮度校正系数公式，计算得出LCD显示面板上各位置的亮度校正系数，从而根据计算得出的亮度校正系数对通过相机拍摄得到的LCD显示面板在不同灰度下的亮度数据进行校正，从而得到校正后的亮度数据，进而根据校正后的亮度数据得到Mura补偿数据，最后利用Mura补偿数据对所述LCD显示面板进行Mura补偿，从而修正了因相机拍摄视角而对Mura补偿效果产生的影响，提高了LCD显示面板的产品品质。In summary, the Mura phenomenon compensation method of the present invention calculates the brightness correction coefficient of each position on the LCD display panel by using the brightness correction coefficient formula, thereby displaying the brightness of the LCD image obtained by the camera according to the calculated brightness correction coefficient. The brightness data of the panel is corrected under different gray levels to obtain the corrected brightness data, and then the Mura compensation data is obtained according to the corrected brightness data, and finally the Mura compensation is performed on the LCD display panel by using the Mura compensation data, thereby correcting The effect of the camera's viewing angle on the Mura compensation effect improves the product quality of the LCD display panel.

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。 In the above, various other changes and modifications can be made in accordance with the technical solutions and technical concept of the present invention, and all such changes and modifications are within the scope of the claims of the present invention. .

Claims (15)

一种Mura现象补偿方法，包括以下步骤：A method for compensating the Mura phenomenon, comprising the following steps: 步骤1、提供一LCD显示面板和相机，在LCD显示面板的中心点的正上方用所述相机对显示一定灰度画面的LCD显示面板拍照，通过采集到的图像得到所述LCD显示面板的亮度数据；Step 1. Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data; 步骤2、将LCD显示面板的中心点作为坐标原点建立一个直角坐标系，所述LCD显示面板的长度、宽度方向分别为X轴、Y轴，垂直于所述LCD显示面板的方向为Z轴，结合直角坐标系得到一亮度校正系数公式；Step 2: The center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system. The length and the width direction of the LCD display panel are respectively an X axis and a Y axis, and a direction perpendicular to the LCD display panel is a Z axis. Combining a Cartesian coordinate system to obtain a brightness correction coefficient formula; 步骤3、利用该亮度校正系数公式结合LCD显示面板上各位置在直角坐标系中的坐标值，计算得出LCD显示面板上各位置的亮度校正系数；Step 3, using the brightness correction coefficient formula combined with the coordinate values of the positions on the LCD display panel in the Cartesian coordinate system, and calculating the brightness correction coefficient of each position on the LCD display panel; 步骤4、根据计算得出的亮度校正系数对亮度数据进行校正，得到校正后的亮度数据；Step 4: correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data; 步骤5、根据校正后的亮度数据得到Mura补偿数据；Step 5: obtaining Mura compensation data according to the corrected brightness data; 步骤6、利用步骤5中获得的Mura补偿数据对所述LCD显示面板进行Mura补偿。Step 6. Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5. 如权利要求1所述的Mura现象补偿方法，其中，所述步骤2中得到的亮度校正系数公式为：The Mura phenomenon compensation method according to claim 1, wherein the brightness correction coefficient formula obtained in the step 2 is:
Figure PCTCN2016078883-appb-100001
Figure PCTCN2016078883-appb-100001
 其中，Z为亮度校正系数，x为所述LCD显示面板上某一位置在直角坐标系中的X轴坐标值，y为所述LCD显示面板上某一位置在直角坐标系中的Y轴坐标值，b为一个与所述相机拍摄时所述LCD显示面板显示的画面灰度有关的系数；Where Z is the brightness correction coefficient, x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system, and y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed; 在所述直角坐标系中，X轴和Y轴均以所述LCD显示面板的长度的一半为1个单位，x的取值范围为[-1，1]，y的取值范围为[-a，a]，a为LCD显示面板的宽度与长度的比值，b的取值范围为
Figure PCTCN2016078883-appb-100002
In the Cartesian coordinate system, the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
Figure PCTCN2016078883-appb-100002
 如权利要求2所述的Mura现象补偿方法，其中，所述步骤4中对亮度数据进行校正所采用的公式为：C1＝C2×Z；其中，C2步骤1中采集到的LCD显示面板上一特定位置的亮度值，Z为该特定位置的亮度校正系数，C1为校正后该特定位置的亮度值。 The Mura phenomenon compensation method according to claim 2, wherein the formula for correcting the luminance data in the step 4 is: C1=C2×Z; wherein, the LCD display panel collected in the step C1 of the C2 is The brightness value of the specific position, Z is the brightness correction coefficient of the specific position, and C1 is the brightness value of the specific position after the correction. 如权利要求2所述的Mura现象补偿方法，其中，所述步骤1中所述相机对所述LCD显示面板拍摄三次，三次拍摄时所述LCD显示面板显示画面的灰度不同，分别为第一、第二、和第三灰度，从而所得到的亮度数据为三份，分别为第一、第二、和第三亮度数据，分别对应所述第一、第二、和第三灰度的显示画面。The Mura phenomenon compensation method according to claim 2, wherein the camera in the step 1 captures the LCD display panel three times, and the gray scales of the display screen of the LCD display panel are different when the three shots are taken, respectively. And second, and third gradation, so that the obtained luminance data is three, which are first, second, and third luminance data respectively corresponding to the first, second, and third gradations Display the screen. 如权利要求4所述的Mura现象补偿方法，其中，所述步骤2-步骤5中，对第一、第二、和第三亮度数据分别进行校正，分别得到第一、第二、和第三校正后的亮度数据，并分别得到第一、第二、和第三Mura补偿数据，其中，对第一、第二、和第三亮度数据进行校正而分别进行的三次计算过程中，对公式中b的取值包括正数和负数。The Mura phenomenon compensation method according to claim 4, wherein in the step 2 - step 5, the first, second, and third luminance data are respectively corrected to obtain first, second, and third, respectively. Corrected luminance data, and respectively obtaining first, second, and third Mura compensation data, wherein the first, second, and third luminance data are corrected and respectively performed in three calculations, in the formula The values of b include positive and negative numbers. 如权利要求5所述的Mura现象补偿方法，其中，所述步骤6中，利用第一、第二、第三Mura补偿数据对所述LCD显示面板分别进行在第一、第二、第三灰度下的Mura补偿。The Mura phenomenon compensation method according to claim 5, wherein in the step 6, the first, second, and third Mashi are respectively performed on the LCD display panel by using the first, second, and third Mura compensation data. Mura compensation under the degree. 如权利要求2所述的Mura现象补偿方法，其中，所述步骤1中所述相机对所述LCD显示面板拍摄三次以上，每次拍摄时所述LCD显示面板显示画面的灰度不同，从而得到的亮度数据为三份以上。The Mura phenomenon compensation method according to claim 2, wherein the camera in the step 1 captures the LCD display panel three times or more, and the gray scale of the LCD display panel display screen is different each time the image is taken, thereby obtaining The brightness data is more than three. 如权利要求3所述的Mura现象补偿方法，其中，所述步骤5中计算Mura补偿数据的公式为：M＝(C1-d)/e；The Mura phenomenon compensation method according to claim 3, wherein the formula for calculating the Mura compensation data in the step 5 is: M = (C1 - d) / e; 其中，M为该特定位置的Mura补偿数据，d为所述LCD显示面板的正常亮度，e为LCD显示面板的亮度与灰度之间的换算系数。Where M is the Mura compensation data for the specific position, d is the normal brightness of the LCD display panel, and e is the conversion factor between the brightness and the gray level of the LCD display panel. 如权利要求8所述的Mura现象补偿方法，其中，所述LCD显示面板的正常亮度为步骤1中采集到的LCD显示面板的中心点的亮度。The Mura phenomenon compensation method according to claim 8, wherein the normal brightness of the LCD display panel is the brightness of the center point of the LCD display panel collected in step 1. 一种Mura现象补偿方法，包括以下步骤：A method for compensating the Mura phenomenon, comprising the following steps: 步骤1、提供一LCD显示面板和相机，在LCD显示面板的中心点的正上方用所述相机对显示一定灰度画面的LCD显示面板拍照，通过采集到的图像得到所述LCD显示面板的亮度数据；Step 1. Providing an LCD display panel and a camera, and photographing the LCD display panel displaying a certain grayscale image with the camera directly above the center point of the LCD display panel, and obtaining the brightness of the LCD display panel by the acquired image. data; 步骤2、将LCD显示面板的中心点作为坐标原点建立一个直角坐标系，所述LCD显示面板的长度、宽度方向分别为X轴、Y轴，垂直于所述LCD显示面板的方向为Z轴，结合直角坐标系得到一亮度校正系数公式；Step 2: The center point of the LCD display panel is used as a coordinate origin to establish a rectangular coordinate system. The length and the width direction of the LCD display panel are respectively an X axis and a Y axis, and a direction perpendicular to the LCD display panel is a Z axis. Combining a Cartesian coordinate system to obtain a brightness correction coefficient formula; 步骤3、利用该亮度校正系数公式结合LCD显示面板上各位置在直角坐标系中的坐标值，计算得出LCD显示面板上各位置的亮度校正系数；Step 3, using the brightness correction coefficient formula combined with the coordinate values of the positions on the LCD display panel in the Cartesian coordinate system, and calculating the brightness correction coefficient of each position on the LCD display panel; 步骤4、根据计算得出的亮度校正系数对亮度数据进行校正，得到校正后的亮度数据；Step 4: correcting the brightness data according to the calculated brightness correction coefficient to obtain corrected brightness data; 步骤5、根据校正后的亮度数据得到Mura补偿数据； Step 5: obtaining Mura compensation data according to the corrected brightness data; 步骤6、利用步骤5中获得的Mura补偿数据对所述LCD显示面板进行Mura补偿；Step 6. Perform Mura compensation on the LCD display panel by using the Mura compensation data obtained in step 5; 其中，所述步骤2中得到的亮度校正系数公式为：Wherein, the formula of the brightness correction coefficient obtained in the step 2 is:
Figure PCTCN2016078883-appb-100003
Figure PCTCN2016078883-appb-100003
 其中，Z为亮度校正系数，x为所述LCD显示面板上某一位置在直角坐标系中的X轴坐标值，y为所述LCD显示面板上某一位置在直角坐标系中的Y轴坐标值，b为一个与所述相机拍摄时所述LCD显示面板显示的画面灰度有关的系数；Where Z is the brightness correction coefficient, x is the X-axis coordinate value of a position on the LCD display panel in the Cartesian coordinate system, and y is the Y-axis coordinate of a position on the LCD display panel in the Cartesian coordinate system a value b is a coefficient related to the gradation of the screen displayed by the LCD display panel when the camera is photographed; 在所述直角坐标系中，X轴和Y轴均以所述LCD显示面板的长度的一半为1个单位，x的取值范围为[-1，1]，y的取值范围为[-a，a]，a为LCD显示面板的宽度与长度的比值，b的取值范围为
Figure PCTCN2016078883-appb-100004
In the Cartesian coordinate system, the X-axis and the Y-axis are both one-half of the length of the LCD display panel, x ranges from [-1, 1], and y ranges from [- a, a], a is the ratio of the width to the length of the LCD display panel, and the value range of b is
Figure PCTCN2016078883-appb-100004
 其中，所述步骤4中对亮度数据进行校正所采用的公式为：C1＝C2×Z；其中，C2步骤1中采集到的LCD显示面板上一特定位置的亮度值，Z为该特定位置的亮度校正系数，C1为校正后该特定位置的亮度值。The formula used for correcting the brightness data in the step 4 is: C1=C2×Z; wherein, the brightness value of a specific position on the LCD display panel collected in step C1 of C2, Z is the specific position The brightness correction coefficient, C1 is the brightness value of the specific position after correction. 如权利要求10所述的Mura现象补偿方法，其中，所述步骤1中所述相机对所述LCD显示面板拍摄三次，三次拍摄时所述LCD显示面板显示画面的灰度不同，分别为第一、第二、和第三灰度，从而所得到的亮度数据为三份，分别为第一、第二、和第三亮度数据，分别对应所述第一、第二、和第三灰度的显示画面。The Mura phenomenon compensation method according to claim 10, wherein the camera in the step 1 captures the LCD display panel three times, and the gray scales of the display screen of the LCD display panel are different when the three shots are taken, respectively. And second, and third gradation, so that the obtained luminance data is three, which are first, second, and third luminance data respectively corresponding to the first, second, and third gradations Display the screen. 如权利要求11所述的Mura现象补偿方法，其中，所述步骤2-步骤5中，对第一、第二、和第三亮度数据分别进行校正，分别得到第一、第二、和第三校正后的亮度数据，并分别得到第一、第二、和第三Mura补偿数据，其中，对第一、第二、和第三亮度数据进行校正而分别进行的三次计算过程中，对公式中b的取值包括正数和负数。The Mura phenomenon compensation method according to claim 11, wherein in the step 2 - step 5, the first, second, and third brightness data are respectively corrected to obtain first, second, and third, respectively. Corrected luminance data, and respectively obtaining first, second, and third Mura compensation data, wherein the first, second, and third luminance data are corrected and respectively performed in three calculations, in the formula The values of b include positive and negative numbers. 如权利要求12所述的Mura现象补偿方法，其中，所述步骤6中，利用第一、第二、第三Mura补偿数据对所述LCD显示面板分别进行在第一、第二、第三灰度下的Mura补偿。The Mura phenomenon compensation method according to claim 12, wherein in the step 6, the first, second, and third Mura compensation data are used to respectively perform the first, second, and third grays on the LCD display panel. Mura compensation under the degree. 如权利要求10所述的Mura现象补偿方法，其中，所述步骤5中计算Mura补偿数据的公式为：M＝(C1-d)/e；The Mura phenomenon compensation method according to claim 10, wherein the formula for calculating the Mura compensation data in the step 5 is: M = (C1 - d) / e; 其中，M为该特定位置的Mura补偿数据，d为所述LCD显示面板的正常亮度，e为LCD显示面板的亮度与灰度之间的换算系数。 Where M is the Mura compensation data for the specific position, d is the normal brightness of the LCD display panel, and e is the conversion factor between the brightness and the gray level of the LCD display panel. 如权利要求14所述的Mura现象补偿方法，其中，所述LCD显示面板的正常亮度为步骤1中采集到的LCD显示面板的中心点的亮度。 The Mura phenomenon compensation method according to claim 14, wherein the normal brightness of the LCD display panel is the brightness of the center point of the LCD display panel collected in the step 1.
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