WO2016173008A1 - 设定液晶面板成像时的像素的灰阶值的方法 - Google Patents

设定液晶面板成像时的像素的灰阶值的方法 Download PDF

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WO2016173008A1
WO2016173008A1 PCT/CN2015/079225 CN2015079225W WO2016173008A1 WO 2016173008 A1 WO2016173008 A1 WO 2016173008A1 CN 2015079225 W CN2015079225 W CN 2015079225W WO 2016173008 A1 WO2016173008 A1 WO 2016173008A1
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sub
pixel
value
region
grayscale
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French (fr)
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陈黎暄
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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 KR1020177023733A priority Critical patent/KR102026002B1/ko
Priority to JP2017556720A priority patent/JP6518792B2/ja
Priority to RU2017134892A priority patent/RU2670252C1/ru
Priority to GB1707596.1A priority patent/GB2546705B/en
Priority to DE112015006498.2T priority patent/DE112015006498T5/de
Priority to US14/787,824 priority patent/US9734750B2/en
Publication of WO2016173008A1 publication Critical patent/WO2016173008A1/zh
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • 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
    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • 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
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • 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
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation

Definitions

  • the present invention generally relates to the field of liquid crystal display technology, and more particularly to a method of setting a grayscale value of a pixel when a liquid crystal panel is imaged.
  • liquid crystal displays have gradually replaced conventional cathode ray tube (CRT) displays with their small size, light weight, and high display quality.
  • the liquid crystal panel of a liquid crystal display is composed of a plurality of arrays of pixels, each of which is usually composed of sub-pixels capable of respectively displaying various colors (for example, R sub-pixels, G sub-pixels, and B sub-pixels), and each sub-pixel is displayed.
  • the brightness is determined by the brightness of the backlight module of the liquid crystal display and the gray scale of the sub-pixels of the liquid crystal panel.
  • the most commonly used method is to keep the brightness of the backlight module at a fixed brightness, and drive each of the liquid crystal panels with different gray scale voltages according to the input image data.
  • the liquid crystal molecules in the pixel are rotated, thereby determining the light transmittance (ie, brightness) of each sub-pixel by the rotation angle of the liquid crystal molecules, so as to achieve the purpose of gray scale display and development.
  • FIG. 1 is a schematic structural diagram of a pixel of a liquid crystal panel using a 2D1G technology. As shown in FIG. 1, a pixel includes an R sub-pixel, a G sub-pixel, and a B sub-pixel, and each sub-pixel includes a main sub-pixel region and a sub-pixel, respectively. Sub-pixel area. Taking FIG. 1,
  • the 2D1G technology is generally used to enable the pixels to display corresponding brightness by applying corresponding gray scale voltages to the main sub-pixel region and the sub-sub-pixel region of each sub-pixel.
  • the white balance technique is then used to enable the pixels to appear white under the corresponding gray level by applying a corresponding gray scale voltage to each sub-pixel of the pixel.
  • the effect of the previous 2D1G processing is affected, and the gamma curve of each sub-pixel often no longer coincides exactly with the gamma curve with a gamma value of 2.2, making the displayed wide-angle image easy. Color shift, light leakage, etc. occur.
  • An exemplary embodiment of the present invention provides a method for setting a grayscale value of a pixel when a liquid crystal panel is imaged to overcome the problem that the wide viewing angle image is prone to color shift, light leakage, and the like in the prior art.
  • a method of setting a grayscale value of a pixel when imaging a liquid crystal panel each pixel of the liquid crystal panel including an R sub-pixel, a G sub-pixel, and a B sub-pixel, each The sub-pixel includes a main sub-pixel region and a sub-sub-pixel region, and the method includes: acquiring, in the case of the front view and the squint, respectively, the main sub-pixel region of each sub-pixel of the pixel at each grayscale value The stimulus value data and the tristimulus value data of the sub-subpixel region at each grayscale value; respectively obtaining the theoretical luminance value of the pixel in the grayscale i in the case of the front view and the squint, wherein i ⁇ [m,n], m is the minimum gray level of the pixel, and n is the maximum gray level of the pixel; according to the obtained tristimulus value data and the theoretical brightness value, it is determined that each pixel can
  • the step of the actual gray scale value includes: gray scale value RM i of the main sub-pixel region of the R sub-pixel that makes ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4, ⁇ 5, and ⁇ 6 satisfy the preset condition, and gray of the sub-sub-pixel region of the R sub-pixel.
  • the gray scale value BS i of the sub-sub-pixel region of the pixel is determined as an actual gray scale value of the main sub-pixel
  • ⁇ 2 y i -(RM i (Y)+GM i (Y)+BM i (Y)+RS i (Y)+GS i (Y)+BS i (Y))/S,
  • RM i (X), RM i (Y), RM i (Z), and RM i (X)', RM i (Y)', and RM i (Z)' respectively indicate in the case of elevation and strabismus
  • Tristimulus values of the main sub-pixel region of the R sub-pixel at RM i , RS i (X), RS i (Y), RS i (Z), and RS i (X)', RS i (Y)', RS i (Z)' indicates the tristimulus values of the sub-subpixel regions of the R sub-pixels at RS i in the case of front view and squint, respectively, GM i (X), GM i (Y), GM i (Z), and GM i (X)', GM i (Y)', GM i (Z)' respectively indicate the tristimulus value of the main sub-pixel region of the G sub-pixel at GM i in
  • the step of respectively acquiring the theoretical brightness value that enables the pixel to present white in the gray level i in the case of the front view and the squint includes: obtaining the situation in the case of the front view and the strabismus by the following formula
  • the pixel can present white theoretical luminance values Lv i and Lv i ' at gray level i:
  • Lv(n) and Lv(n)' respectively indicate an actual luminance value that enables the pixel to appear white at gray scale n in the case of front view and squint, and ⁇ is a predetermined gamma value.
  • ⁇ is 2.2.
  • n is 255.
  • the front view is such that the liquid crystal panel is viewed at a viewing angle of 0° with respect to the vertical direction of the liquid crystal panel, and the squint case is to observe the liquid crystal panel at a viewing angle at a predetermined angle from the vertical direction of the liquid crystal panel.
  • the predetermined angle is 60°.
  • 2D1G processing and white balance processing can be efficiently performed simultaneously, thereby effectively and accurately setting the pixel at the time of imaging of the liquid crystal panel
  • the gray scale value improves the problem that the wide viewing angle image is prone to color shift and light leakage.
  • FIG. 1 is a schematic structural view of a pixel of a conventional liquid crystal panel using 2D1G technology
  • FIG. 2 illustrates a flow chart of a method of setting a grayscale value of a pixel when a liquid crystal panel is imaged, according to an exemplary embodiment of the present invention.
  • Each pixel of the liquid crystal panel includes an R sub-pixel, a G sub-pixel, and a B sub-pixel, and each sub-pixel includes a main sub-pixel region and a sub-sub-pixel region.
  • step S10 the tristimulus value data and the sub-subpixel region at each grayscale value of the main sub-pixel region of each sub-pixel of each pixel in the case of the front view and the squint are respectively acquired.
  • Tristimulus value data That is, the main sub-pixel region and the sub-sub-pixel region of the R sub-pixel of the pixel, the main sub-pixel region and the sub-sub-pixel region of the G sub-pixel, and the main sub-pixel region of the B sub-pixel and the second sub-pixel region are respectively acquired in the case of the front view and the squint.
  • the tristimulus value data of each sub-pixel region at each grayscale value are respectively acquired.
  • the front view may be such that the liquid crystal panel is viewed at a viewing angle of 0° with respect to the vertical direction of the liquid crystal panel, and the squint may be viewed from a viewing angle at a predetermined angle from the vertical direction of the liquid crystal panel.
  • the predetermined angle may be any angle greater than 30° and less than 80°, and preferably, the predetermined angle may be 60°.
  • the tristimulus value data of the main sub-pixel region of each sub-pixel of the pixel at each grayscale value and the tristimulus value data of the sub-subpixel region at each grayscale value can be obtained by various existing methods.
  • step S20 a theoretical luminance value that enables the pixel to appear white in grayscale i in the case of front view and squint, respectively, is obtained, where i ⁇ [m, n], m is the minimum gray scale of the pixel, n The maximum gray level of the pixel.
  • the number of gray levels of the pixels varies with the liquid crystal panel.
  • the gray scale number is 256, and the gray scales may be sequentially represented as 0, 1, 2, ..., 255.
  • the minimum gray level is 0, and the maximum gray level m is 255.
  • the tristimulus value data obtained at each grayscale value in step S10 is the tristimulus value data obtained when the grayscale values are 0, 1, 2, ..., 255, respectively.
  • the liquid crystal panel is a 10-bit liquid crystal panel
  • the number of gray levels is 1024
  • the gray scales can be sequentially expressed as 0, 1, 2, ..., 1023.
  • the minimum gray level is 0, and the maximum gray level m is 1023.
  • the tristimulus value data obtained at each grayscale value in step S10 is the tristimulus value data obtained when the grayscale values are 0, 1, 2, ..., 1023, respectively.
  • the theoretical luminance values Lv i and Lv i ' that enable the pixel to appear white at gray level i in the case of a front view and a squint can be obtained by:
  • Lv(n) and Lv(n)' respectively indicate an actual luminance value that enables the pixel to appear white at gray scale n in the case of front view and squint
  • ⁇ is a predetermined gamma value.
  • ⁇ can be 2.2.
  • Lv(n) and Lv(n)' can be obtained using various existing methods.
  • the pixel actually measured in the case of the front view may be the Lv(n) as the brightness value of the pixel when the gray scale n is white, and the pixel actually measured in the case of squint may be grayed out.
  • the luminance value of the pixel when the order n is white is taken as Lv(n)'.
  • step S30 based on the acquired tristimulus value data and the theoretical luminance value, determining an actual grayscale value of the main sub-pixel region of each sub-pixel that enables the pixel to appear white in grayscale i and an actual grayscale of the sub-subpixel region. Order value.
  • the actual gray scale value of the main sub-pixel region of the R sub-pixel that enables the pixel to be white at the gray level i the actual gray scale value of the sub-sub-pixel region of the R sub-pixel, and the main sub-g pixel of the G sub-pixel may be used.
  • ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4, ⁇ 5, and ⁇ 6 satisfy the grayscale value RM i of the main sub-pixel region of the R sub-pixel of the preset condition, the grayscale value RS i of the sub-sub-pixel region of the R sub-pixel, Gray scale value GM i of the main sub-pixel region of the G sub-pixel, gray scale value GS i of the sub-sub-pixel region of the G sub-pixel, gray scale value BM i of the main sub-pixel region of the B sub-pixel, and sub-subpixel of the B sub-pixel
  • the grayscale value BS i of the region is determined as an actual grayscale value of the main subpixel region of the R subpixel that enables the pixel to appear white in grayscale i, an actual grayscale value of the subsubpixel region of the R subpixel, G sub The actual grayscale value of the main sub-pixel region of the pixel, the actual grayscale value of the sub-subpixel region of the G sub-pixel, the actual grayscale value of
  • RM i (X), RM i (Y), RM i (Z), and RM i (X)', RM i (Y)', and RM i (Z)' respectively indicate in the case of elevation and strabismus
  • Tristimulus values of the main sub-pixel region of the R sub-pixel at RM i , RS i (X), RS i (Y), RS i (Z), and RS i (X)', RS i (Y)', RS i (Z)' indicates the tristimulus values of the sub-subpixel regions of the R sub-pixels at RS i in the case of front view and squint, respectively, GM i (X), GM i (Y), GM i (Z), and GM i (X)', GM i (Y)', GM i (Z)' respectively indicate the tristimulus value of the main sub-pixel region of the G sub-pixel at GM i in
  • x n , x n+1 ..., x m may be the same value (for example, when n is 0, m is 255, x 0 , x 1 ..., x 255 may be the same value), or Different values with small differences, for example, the difference is less than 0.015 or less than 0.02.
  • y n , y n+1 ??, y m can be the same value (for example, when n is 0, m is 255, y 0 , y 1 ..., y 255 can be the same value),
  • the difference is less than 0.015 or less than 0.02.
  • preset conditions to be satisfied by ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4, ⁇ 5, and ⁇ 6 may be set according to experience and specific conditions.
  • the above method according to an exemplary embodiment of the present invention may be implemented as a computer program such that when the program is run, the above method is implemented.
  • a lookup table for realizing the gray scale values of the main sub-pixel region and the sub-sub-pixel region of each sub-pixel of the pixel for enabling the pixel to be white at each gray scale may be obtained according to the above method, so that the liquid crystal display is actually When displayed, the lookup table can be used to determine the corresponding gray scale voltage to be applied to the main sub-pixel region and the sub-sub-pixel region of each sub-pixel.
  • the 2D1G processing and the white balance processing can be efficiently performed at the same time, thereby avoiding the sequential 2D1G processing and the white balance processing to affect the 2D1G.
  • the problem of processing effect can effectively and accurately set the liquid crystal
  • the grayscale value of the pixel when the panel is imaged improves the problem that the wide viewing angle image is prone to color shift and light leakage.

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Abstract

提供一种设定液晶面板成像时的像素的灰阶值的方法。所述方法包括：分别获取在正视情况下和斜视情况下，像素的每一子像素的主子像素区域在各灰阶值时的三刺激值数据和次子像素区域在各灰阶值时的三刺激值数据；分别获取在正视情况下和斜视情况下，使所述像素能够在灰阶i呈现白色的理论亮度值，其中，i∈[m，n]，m为像素的最小灰阶，n为像素的最大灰阶；根据获取的三刺激值数据和理论亮度值，确定使所述像素能够在灰阶i呈现白色的每一子像素的主子像素区域的实际灰阶值和次子像素区域的实际灰阶值。根据所述方法，能够有效、准确地设定液晶面板成像时的像素的灰阶值。

Description

设定液晶面板成像时的像素的灰阶值的方法 技术领域
本发明总体说来涉及液晶显示器技术领域，更具体地讲，涉及一种设定液晶面板成像时的像素的灰阶值的方法。
背景技术
近年来，液晶显示器(LCD)以其体积小、重量轻、显示质量高等优点逐渐替代了以往的阴极射线显像管(CRT)显示器。液晶显示器的液晶面板由许多阵列排列的像素构成，每一个像素通常由能够分别显示各种颜色的子像素(例如，R子像素、G子像素和B子像素)组成，每一个子像素所显示的亮度由液晶显示器的背光模组的亮度和该液晶面板的子像素的灰阶共同决定。现有的液晶显示器的驱动方法中，最常使用的方法是使背光模组的亮度保持在一个固定亮度，根据输入的影像资料，分别以不同大小的灰阶电压驱动该液晶面板的每一个子像素内的液晶分子进行旋转，从而通过液晶分子的旋转角度来决定各个子像素的透光率(即，亮度)，以达到灰阶显示和显像的目的。
随着液晶显示器的不断应用，人们对液晶显示器的视角的要求也逐渐提高，由此，开发出了可视角度比较大的广视角液晶显示器，例如，MVALCD等。这种广视角液晶显示器可通过2D1G技术、白平衡技术等技术来进行广视角图像的显示。图1示出现有的采用2D1G技术的液晶面板的像素的结构示意图，如图1所示，像素包括R子像素、G子像素以及B子像素，每一子像素又分别包括主子像素区域和次子像素区域。以图1为例，接收到影像资料后，一般先采用2D1G技术通过向各子像素的主子像素区域和次子像素区域施加相应的灰阶电压来使像素能够呈现相应的亮度。然后采用白平衡技术通过向像素的各子像素施加相应的灰阶电压来使像素能够呈现在相应灰阶下的白色。但往往在进行白平衡处理之后，会影响之前进行的2D1G处理的效果，各子像素的伽马曲线往往不再准确地与伽马值为2.2的伽马曲线重合，使得显示的广视角图像容易出现色偏、漏光等现象。
发明内容
本发明的示例性实施例在于提供一种设定液晶面板成像时的像素的灰阶值的方法，以克服现有技术显示广视角图像容易出现色偏、漏光等现象的问题。
根据本发明的示例性实施例，提供一种设定液晶面板成像时的像素的灰阶值的方法，所述液晶面板的每一像素包括R子像素、G子像素以及B子像素，每一子像素包括主子像素区域和次子像素区域，其特征在于，所述方法包括：分别获取在正视情况下和斜视情况下，像素的每一子像素的主子像素区域在各灰阶值时的三刺激值数据和次子像素区域在各灰阶值时的三刺激值数据；分别获取在正视情况下和斜视情况下，使所述像素能够在灰阶i呈现白色的理论亮度值，其中，i∈[m，n]，m为像素的最小灰阶，n为像素的最大灰阶；根据获取的三刺激值数据和理论亮度值，确定使所述像素能够在灰阶i呈现白色的每一子像素的主子像素区域的实际灰阶值和次子像素区域的实际灰阶值。
可选地，所述根据获取的三刺激值数据和理论亮度值，确定使所述像素能够在灰阶i呈现白色的每一子像素的主子像素区域的实际灰阶值和次子像素区域的实际灰阶值的步骤包括：将使Δ1、Δ2、Δ3、Δ4、Δ5和Δ6满足预设条件的R子像素的主子像素区域的灰阶值RMi、R子像素的次子像素区域的灰阶值RSi、G子像素的主子像素区域的灰阶值GMi、G子像素的次子像素区域的灰阶值GSi、B子像素的主子像素区域的灰阶值BMi和B子像素的次子像素区域的灰阶值BSi确定为使所述像素能够在灰阶i呈现白色的R子像素的主子像素区域的实际灰阶值、R子像素的次子像素区域的实际灰阶值、G子像素的主子像素区域的实际灰阶值、G子像素的次子像素区域的实际灰阶值、B子像素的主子像素区域的实际灰阶值和B子像素的次子像素区域的实际灰阶值，其中，
Δ1＝xi-(RMi(X)+GMi(X)+BMi(X)+RSi(X)+GSi(X)+BSi(X))/S，
Δ2＝yi-(RMi(Y)+GMi(Y)+BMi(Y)+RSi(Y)+GSi(Y)+BSi(Y))/S，
Δ3＝RMi(Y)+GMi(Y)+BMi(Y)+RSi(Y)+GSi(Y)+BSi(Y)-Lvi，
Δ4＝xi-(RMi(X)′+GMi(X)′+BMi(X)′+RSi(X)′+GSi(X)′+BSi(X)′)/S′，
Δ5＝yi-(RMi(Y)′+GMi(Y)′+BMi(Y)′+RSi(Y)′+GSi(Y)′+BSi(Y)′)/S′，
Δ6＝RMi(Y)′+GMi(Y)′+BMi(Y)′+RSi(Y)′+GSi(Y)′+BSi(Y)′-Lvi′，
其中，(xi,yi)指示在CIE1931色彩空间下在灰阶i呈现的白色对应的坐标，S＝RMi(X)+RMi(Y)+RMi(Z)+GMi(X)+GMi(Y)+GMi(Z)+BMi(X)+BMi(Y)+BMi(Z)+RSi(X)+RSi(Y)+RSi(Z)+GSi(X)+GSi(Y)+GSi(Z)+BSi(X)+BSi(Y)+BSi(Z)，
S′＝RMi(X)′+RMi(Y)′+RMi(Z)′+GMi(X)′+GMi(Y)′+GMi(Z)′+BMi(X)′+BMi(Y)′+BMi(Z)′+RSi(X)′+RSi(Y)′+RSi(Z)′+GSi(X)′+GSi(Y)′+GSi(Z)′+BSi(X)′+BSi(Y)′+BSi(Z)′，
其中，RMi(X)、RMi(Y)、RMi(Z)和RMi(X)′、RMi(Y)′、RMi(Z)′分别指示在正视情况下和斜视情况下R子像素的主子像素区域在RMi时的三刺激值，RSi(X)、RSi(Y)、RSi(Z)和RSi(X)′、RSi(Y)′、RSi(Z)′分别指示在正视情况下和斜视情况下R子像素的次子像素区域在RSi时的三刺激值，GMi(X)、GMi(Y)、GMi(Z)和GMi(X)′、GMi(Y)′、GMi(Z)′分别指示在正视情况下和斜视情况下G子像素的主子像素区域在GMi时的三刺激值，GSi(X)、GSi(Y)、GSi(Z)和GSi(X)′、GSi(Y)′、GSi(Z)′分别指示在正视情况下和斜视情况下G子像素的次子像素区域在GSi时的三刺激值，BMi(X)、BMi(Y)、BMi(Z)和BMi(X)′、BMi(Y)′、BMi(Z)′分别指示在正视情况和斜视情况下B子像素的主子像素区域在BMi时的三刺激值，BSi(X)、BSi(Y)、BSi(Z)和BSi(X)'、BSi(Y)'、BSi(Z)'分别指示在正视情况下和斜视情况下B子像素的次子像素区域在BSi时的三刺激值，Lvi和Lvi′分别指示在正视情况下和斜视情况下使所述像素能够在灰阶i呈现白色的理论亮度值。
可选地，Δ1、Δ2、Δ3、Δ4、Δ5和Δ6满足的预设条件为以下项中的一项：Δ＝Δ1+Δ2+Δ3+Δ4+Δ5+Δ6达到最小值、Δ＝Δ12+Δ22+Δ32+Δ42+Δ52+Δ62达到最小值、Δ＝aΔ12+bΔ22+cΔ32+dΔ42+eΔ52+fΔ62达到最小值，其中，a、b、c、d、e和f为加权系数。
可选地，所述分别获取在正视情况下和斜视情况下，使所述像素能够在灰阶i呈现白色的理论亮度值的步骤包括：通过下式获取在正视情况下和斜视情 况下使所述像素能够在灰阶i呈现白色的理论亮度值Lvi和Lvi′：
Lvi＝Lv(n)*(i/n)γ，
Lvi′＝Lv(n)′*(i/n)γ，
其中，Lv(n)和Lv(n)′分别指示在正视情况下和斜视情况下使所述像素能够在灰阶n呈现白色的实际亮度值，γ为预定伽马值。
可选地，γ为2.2。
可选地，m为0，n为255。
可选地，所述正视情况为以与液晶面板的垂直方向呈0°的视角观察液晶面板，所述斜视情况为以与液晶面板的垂直方向呈预定角度的视角观察液晶面板。
可选地，所述预定角度为60°。
在根据本发明示例性实施例的设定液晶面板成像时的像素的灰阶值的方法中，能够同时有效地进行2D1G处理和白平衡处理，从而有效、准确地设定液晶面板成像时的像素的灰阶值，改善显示广视角图像容易出现色偏、漏光等现象的问题。
将在接下来的描述中部分阐述本发明总体构思另外的方面和/或优点，还有一部分通过描述将是清楚的，或者可以经过本发明总体构思的实施而得知。
附图说明
图1示出现有的采用2D1G技术的液晶面板的像素的结构示意图；
图2示出根据本发明示例性实施例的设定液晶面板成像时的像素的灰阶值的方法的流程图。
具体实施方式
现将详细参照本发明的实施例，所述实施例的示例在附图中示出，其中，相同的标号始终指的是相同的部件。以下将通过参照附图来说明所述实施例，以便解释本发明。
图2示出根据本发明示例性实施例的设定液晶面板成像时的像素的灰阶值的方法的流程图。所述液晶面板的每一像素包括R子像素、G子像素以及B子像素，每一子像素包括主子像素区域和次子像素区域。
参照图2，在步骤S10，分别获取在正视情况下和斜视情况下，像素的每一子像素的主子像素区域在各灰阶值时的三刺激值数据和次子像素区域在各灰阶值时的三刺激值数据。即，分别获取在正视情况下和斜视情况下，像素的R子像素的主子像素区域和次子像素区域、G子像素的主子像素区域和次子像素区域以及B子像素的主子像素区域和次子像素区域分别在各灰阶值时的三刺激值数据。
这里，所述正视情况可为以与液晶面板的垂直方向呈0°的视角观察液晶面板，所述斜视情况可为以与液晶面板的垂直方向呈预定角度的视角观察液晶面板。所述预定角度可为大于30°小于80°的任意角度，优选地，所述预定角度可为60°。
应该理解，可通过现有的各种方法获取像素的每一子像素的主子像素区域在各灰阶值时的三刺激值数据和次子像素区域在各灰阶值时的三刺激值数据。
在步骤S20，分别获取在正视情况下和斜视情况下，使所述像素能够在灰阶i呈现白色的理论亮度值，其中，i∈[m，n]，m为像素的最小灰阶，n为像素的最大灰阶。
应该理解，像素的灰阶数随液晶面板的不同而不同，例如，当液晶面板为8比特液晶面板时，灰阶数为256，灰阶可依次表示为0,1,2……,255。此时，最小灰阶为0，最大灰阶m为255。相应的，在步骤S10获取在各灰阶值时的三刺激值数据即为分别获取在灰阶值0,1,2……,255时的三刺激值数据。
例如，当液晶面板为10比特液晶面板时，灰阶数为1024，灰阶可依次表示为0,1,2……,1023。此时，最小灰阶为0，最大灰阶m为1023。相应的，在步骤S10获取在各灰阶值时的三刺激值数据即为分别获取在灰阶值0,1,2……,1023时的三刺激值数据。
应该理解，可通过现有的各种方法获取在正视情况下和斜视情况下，使所述像素能够在灰阶i呈现白色的理论亮度值。
作为示例，可通过下式获取在正视情况下和斜视情况下使所述像素能够在灰阶i呈现白色的理论亮度值Lvi和Lvi′：
Lvi＝Lv(n)*(i/n)γ    (1)，
Lvi′＝Lv(n)′*(i/n)γ   (2)，
其中，Lv(n)和Lv(n)′分别指示在正视情况下和斜视情况下使所述像素能够在灰阶n呈现白色的实际亮度值，γ为预定伽马值。优选地，γ可为2.2。
这里，可使用现有的各种方法获取Lv(n)和Lv(n)′。例如，可将在正视情况下实际测量得到的所述像素在灰阶n呈现白色时的所述像素的亮度值作为Lv(n)，可将在斜视情况下实际测量得到的所述像素在灰阶n呈现白色时的所述像素的亮度值作为Lv(n)′。
在步骤S30，根据获取的三刺激值数据和理论亮度值，确定使所述像素能够在灰阶i呈现白色的每一子像素的主子像素区域的实际灰阶值和次子像素区域的实际灰阶值。
具体说来，可根据使所述像素能够在灰阶i呈现白色的R子像素的主子像素区域的实际灰阶值、R子像素的次子像素区域的实际灰阶值、G子像素的主子像素区域的实际灰阶值、G子像素的次子像素区域的实际灰阶值、B子像素的主子像素区域的实际灰阶值和B子像素的次子像素区域的实际灰阶值所分别对应的三刺激值数据，与在CIE1931色彩空间下在灰阶i呈现的白色对应的坐标以及在正视情况下和斜视情况下使所述像素能够在灰阶i呈现白色的理论亮度值之间的关系，确定上述各实际灰阶值。
作为示例，将使Δ1、Δ2、Δ3、Δ4、Δ5和Δ6满足预设条件的R子像素的主子像素区域的灰阶值RMi、R子像素的次子像素区域的灰阶值RSi、G子像素的主子像素区域的灰阶值GMi、G子像素的次子像素区域的灰阶值GSi、B子像素的主子像素区域的灰阶值BMi和B子像素的次子像素区域的灰阶值BSi确 定为使所述像素能够在灰阶i呈现白色的R子像素的主子像素区域的实际灰阶值、R子像素的次子像素区域的实际灰阶值、G子像素的主子像素区域的实际灰阶值、G子像素的次子像素区域的实际灰阶值、B子像素的主子像素区域的实际灰阶值和B子像素的次子像素区域的实际灰阶值，其中，
Δ1＝xi-(RMi(X)+GMi(X)+BMi(X)+RSi(X)+GSi(X)+BSi(X))/S    (3)，
Δ2＝yi-(RMi(Y)+GMi(Y)+BMi(Y)+RSi(Y)+GSi(Y)+BSi(Y))/S    (4)，
Δ3＝RMi(Y)+GMi(Y)+BMi(Y)+RSi(Y)+GSi(Y)+BSi(Y)-Lvi    (5)，
Δ4＝xi-(RMi(X)′+GMi(X)′+BMi(X)′+RSi(X)′+GSi(X)′+BSi(X)′)/S′    (6)，
Δ5＝yi-(RMi(Y)′+GMi(Y)′+BMi(Y)′+RSi(Y)′+GSi(Y)′+BSi(Y)′)/S′    (7)，
Δ6＝RMi(Y)′+GMi(Y)′+BMi(Y)′+RSi(Y)′+GSi(Y)′+BSi(Y)′-Lvi′    (8)，
其中，(xi,yi)指示在CIE1931色彩空间下在灰阶i呈现的白色对应的坐标，S＝RMi(X)+RMi(Y)+RMi(Z)+GMi(X)+GMi(Y)+GMi(Z)+BMi(X)+BMi(Y)+BMi(Z)+RSi(X)+RSi(Y)+RSi(Z)+GSi(X)+GSi(Y)+GSi(Z)+BSi(X)+BSi(Y)+BSi(Z),S′＝RMi(X)′+RMi(Y)′+RMi(Z)′+GMi(X)′+GMi(Y)′+GMi(Z)′+BMi(X)′+BMi(Y)′+BMi(Z)′+RSi(X)′+RSi(Y)′+RSi(Z)′+GSi(X)′+GSi(Y)′+GSi(Z)′+BSi(X)′+BSi(Y)′+BSi(Z)′,
其中，RMi(X)、RMi(Y)、RMi(Z)和RMi(X)′、RMi(Y)′、RMi(Z)′分别指示在正视情况下和斜视情况下R子像素的主子像素区域在RMi时的三刺激值，RSi(X)、RSi(Y)、RSi(Z)和RSi(X)′、RSi(Y)′、RSi(Z)′分别指示在正视情况下和斜视情况下R子像素的次子像素区域在RSi时的三刺激值，GMi(X)、GMi(Y)、GMi(Z)和GMi(X)′、GMi(Y)′、GMi(Z)′分别指示在正视情况下和斜视情况下G子像素的主子像素区域在GMi时的三刺激值，GSi(X)、GSi(Y)、GSi(Z)和GSi(X)′、GSi(Y)′、GSi(Z)′分别指示在正视情况下和 斜视情况下G子像素的次子像素区域在GSi时的三刺激值，BMi(X)、BMi(Y)、BMi(Z)和BMi(X)′、BMi(Y)′、BMi(Z)′分别指示在正视情况和斜视情况下B子像素的主子像素区域在BMi时的三刺激值，BSi(X)、BSi(Y)、BSi(Z)和BSi(X)'、BSi(Y)'、BSi(Z)'分别指示在正视情况下和斜视情况下B子像素的次子像素区域在BSi时的三刺激值，Lvi和Lvi′分别指示在正视情况下和斜视情况下使所述像素能够在灰阶i呈现白色的理论亮度值。
这里，xn,xn+1……,xm可为同一值(例如，当n为0，m为255时，x0,x1……,x255可为同一值)，也可为差异较小的不同值，例如，差异小于0.015或小于0.02。相应的，yn,yn+1……,ym可为同一值(例如，当n为0，m为255时，y0,y1……,y255可为同一值)，也可为差异较小的不同值，例如，差异小于0.015或小于0.02。
作为示例，可根据经验和具体情况设置Δ1、Δ2、Δ3、Δ4、Δ5和Δ6需满足的预设条件。例如，Δ1、Δ2、Δ3、Δ4、Δ5和Δ6满足的预设条件可为以下项中的一项：Δ＝Δ1+Δ2+Δ3+Δ4+Δ5+Δ6达到最小值、Δ＝Δ12+Δ22+Δ32+Δ42+Δ52+Δ62达到最小值、Δ＝aΔ12+bΔ22+cΔ32+dΔ42+eΔ52+fΔ62达到最小值，其中，a、b、c、d、e和f为加权系数，可根据经验和具体情况设置a、b、c、d、e和f的值。
此外，根据本发明的示例性实施例的上述方法可以被实现为计算机程序，从而当运行该程序时，实现上述方法。或者，也可根据上述方法来获取用于使像素能够在各灰阶呈现白色的关于像素的各子像素的主子像素区域和次子像素区域的实际灰阶值的查找表，使得液晶显示器在实际显示时，可通过此查找表确定需要向各子像素的主子像素区域和次子像素区域施加的相应的灰阶电压。
根据本发明示例性实施例的设定液晶面板成像时的像素的灰阶值的方法，能够同时有效地进行2D1G处理和白平衡处理，从而可避免先后进行2D1G处理和白平衡处理而影响2D1G的处理效果的问题，能够有效、准确地设定液晶 面板成像时的像素的灰阶值，改善显示广视角图像容易出现色偏、漏光等现象的问题。
虽然已表示和描述了本发明的一些示例性实施例，但本领域技术人员应该理解，在不脱离由权利要求及其等同物限定其范围的本发明的原理和精神的情况下，可以对这些实施例进行修改。

Claims (8)

  1. 一种设定液晶面板成像时的像素的灰阶值的方法，所述液晶面板的每一像素包括R子像素、G子像素以及B子像素，每一子像素包括主子像素区域和次子像素区域，其中，所述方法包括：
    分别获取在正视情况下和斜视情况下，像素的每一子像素的主子像素区域在各灰阶值时的三刺激值数据和次子像素区域在各灰阶值时的三刺激值数据；
    分别获取在正视情况下和斜视情况下，使所述像素能够在灰阶i呈现白色的理论亮度值，其中，i∈[m，n]，m为像素的最小灰阶，n为像素的最大灰阶；
    根据获取的三刺激值数据和理论亮度值，确定使所述像素能够在灰阶i呈现白色的每一子像素的主子像素区域的实际灰阶值和次子像素区域的实际灰阶值。
  2. 根据权利要求1所述的方法，其中，所述根据获取的三刺激值数据和理论亮度值，确定使所述像素能够在灰阶i呈现白色的每一子像素的主子像素区域的实际灰阶值和次子像素区域的实际灰阶值的步骤包括：
    将使Δ1、Δ2、Δ3、Δ4、Δ5和Δ6满足预设条件的R子像素的主子像素区域的灰阶值RMi、R子像素的次子像素区域的灰阶值RSi、G子像素的主子像素区域的灰阶值GMi、G子像素的次子像素区域的灰阶值GSi、B子像素的主子像素区域的灰阶值BMi和B子像素的次子像素区域的灰阶值BSi确定为使所述像素能够在灰阶i呈现白色的R子像素的主子像素区域的实际灰阶值、R子像素的次子像素区域的实际灰阶值、G子像素的主子像素区域的实际灰阶值、G子像素的次子像素区域的实际灰阶值、B子像素的主子像素区域的实际灰阶值和B子像素的次子像素区域的实际灰阶值，其中，
    Δ1＝xi-(RMi(X)+GMi(X)+BMi(X)+RSi(X)+GSi(X)+BSi(X))/S，
    Δ2＝yi-(RMi(Y)+GMi(Y)+BMi(Y)+RSi(Y)+GSi(Y)+BSi(Y))/S，
    Δ3＝RMi(Y)+GMi(Y)+BMi(Y)+RSi(Y)+GSi(Y)+BSi(Y)-Lvi，
    Δ4＝xi-(RMi(X)′+GMi(X)′+BMi(X)′+RSi(X)′+GSi(X)′+BSi(X)′)/S′，
    Δ5＝yi-(RMi(Y)′+GMi(Y)′+BMi(Y)′+RSi(Y)′+GSi(Y)′+BSi(Y)′)/S′，
    Δ6＝RMi(Y)′+GMi(Y)′+BMi(Y)′+RSi(Y)′+GSi(Y)′+BSi(Y)′-Lvi′，
    其中，(xi,yi)指示在CIE1931色彩空间下在灰阶i呈现的白色对应的坐标，S＝RMi(X)+RMi(Y)+RMi(Z)+GMi(X)+GMi(Y)+GMi(Z)+BMi(X)+BMi(Y)+BMi(Z)+RSi(X)+RSi(Y)+RSi(Z)+GSi(X)+GSi(Y)+GSi(Z)+BSi(X)+BSi(Y)+BSi(Z),S′＝RMi(X)′+RMi(Y)′+RMi(Z)′+GMi(X)′+GMi(Y)′+GMi(Z)′+BMi(X)′+BMi(Y)′+BMi(Z)′+RSi(X)′+RSi(Y)′+RSi(Z)′+GSi(X)′+GSi(Y)′+GSi(Z)′+BSi(X)′+BSi(Y)′+BSi(Z)′,
    其中，RMi(X)、RMi(Y)、RMi(Z)和RMi(X)′、RMi(Y)′、RMi(Z)′分别指示在正视情况下和斜视情况下R子像素的主子像素区域在RMi时的三刺激值，RSi(X)、RSi(Y)、RSi(Z)和RSi(X)′、RSi(Y)′、RSi(Z)′分别指示在正视情况下和斜视情况下R子像素的次子像素区域在RSi时的三刺激值，GMi(X)、GMi(Y)、GMi(Z)和GMi(X)′、GMi(Y)′、GMi(Z)′分别指示在正视情况下和斜视情况下G子像素的主子像素区域在GMi时的三刺激值，GSi(X)、GSi(Y)、GSi(Z)和GSi(X)′、GSi(Y)′、GSi(Z)′分别指示在正视情况下和斜视情况下G子像素的次子像素区域在GSi时的三刺激值，BMi(X)、BMi(Y)、BMi(Z)和BMi(X)′、BMi(Y)′、BMi(Z)′分别指示在正视情况和斜视情况下B子像素的主子像素区域在BMi时的三刺激值，BSi(X)、BSi(Y)、BSi(Z)和BSi(X)'、BSi(Y)'、BSi(Z)'分别指示在正视情况下和斜视情况下B子像素的次子像素区域在BSi时的三刺激值，Lvi和Lvi′分别指示在正视情况下和斜视情况下使所述像素能够在灰阶i呈现白色的理论亮度值。
  3. 根据权利要求2所述的方法，其中，Δ1、Δ2、Δ3、Δ4、Δ5和Δ6满足的预设条件为以下项中的一项：Δ＝Δ1+Δ2+Δ3+Δ4+Δ5+Δ6达到最小值、Δ＝Δ12+Δ22+Δ32+Δ42+Δ52+Δ62达到最小值、Δ＝aΔ12+bΔ22+cΔ32+dΔ42+eΔ52+fΔ62达到最小值，其中，a、b、c、d、e和f为加权系数。
  4. 根据权利要求1所述的方法，其中，所述分别获取在正视情况下和斜视情况下，使所述像素能够在灰阶i呈现白色的理论亮度值的步骤包括：
    通过下式获取在正视情况下和斜视情况下使所述像素能够在灰阶i呈现白色的理论亮度值Lvi和Lvi′：
    Lvi＝Lv(n)*(i/n)γ，
    Lvi′＝Lv(n)′*(i/n)γ，
    其中，Lv(n)和Lv(n)′分别指示在正视情况下和斜视情况下使所述像素能够在灰阶n呈现白色的实际亮度值，γ为预定伽马值。
  5. 根据权利要求4所述的方法，其中，γ为2.2。
  6. 根据权利要求1所述的方法，其中，m为0，n为255。
  7. 根据权利要求1所述的方法，其中，所述正视情况为以与液晶面板的垂直方向呈0°的视角观察液晶面板，所述斜视情况为以与液晶面板的垂直方向呈预定角度的视角观察液晶面板。
  8. 根据权利要求7所述的方法，其中，所述预定角度为60°。
PCT/CN2015/079225 2015-04-29 2015-05-18 设定液晶面板成像时的像素的灰阶值的方法 Ceased WO2016173008A1 (zh)

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