WO2019041397A1 - 显示装置图像处理方法、图像处理结构及显示装置 - Google Patents

显示装置图像处理方法、图像处理结构及显示装置 Download PDF

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WO2019041397A1
WO2019041397A1 PCT/CN2017/102229 CN2017102229W WO2019041397A1 WO 2019041397 A1 WO2019041397 A1 WO 2019041397A1 CN 2017102229 W CN2017102229 W CN 2017102229W WO 2019041397 A1 WO2019041397 A1 WO 2019041397A1
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display device
lookup table
gray value
color saturation
module
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PCT/CN2017/102229
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English (en)
French (fr)
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赵文勤
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惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Priority to US15/580,306 priority Critical patent/US10446095B2/en
Publication of WO2019041397A1 publication Critical patent/WO2019041397A1/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
    • G09G3/34—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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by 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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • G09G2300/0447—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
    • 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
    • G09G2320/028—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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display, and in particular, to a display device image processing method, an image processing structure, and a display device.
  • the current image processing technology divides the display area on the liquid crystal panel into a plurality of pixels (Pixel), and each pixel has three primary colors of red, green, and blue. Since all visible light colors can be produced by mixing red (R), green (G), and blue (B) light, the brightness of the red (R), green (G), and blue (B) sub-pixels is controlled.
  • CIE International Commission on Illumination
  • CIE XYZ Color Space CIE 1931 XYZ Color Space
  • the color space uses three colors of red, green and blue as the three primary colors, all other colors can be formed by mixing three primary colors, and all the colors are stimulated by X, Y and Z, with three primary colors. Different proportions show various colors.
  • a liquid crystal display is a flat ultra-thin display device composed of a certain number of color or black-and-white pixels placed in front of a light source or a reflector.
  • LCD monitors have low power consumption and are characterized by high image quality, small size, and light weight. Therefore, they are favored by everyone and become the mainstream of displays.
  • Liquid crystal displays have been widely used in various electronic products, for example, computer devices with display screens, mobile phones, or digital photo frames, and the wide viewing angle technology is one of the development priorities of current liquid crystal displays. However, when the viewing angle of the side view or the squint is too large, a wide-angle liquid crystal display often undergoes a color shift phenomenon.
  • the viewing angle characteristic of the display is an important indicator of the color of the display.
  • the visual directional difference of the VA (Vertical Alignment liquid crystal) type liquid crystal display (color difference) because the birefringence effect of the liquid crystal crystal is different, the deviation of the apparent degree of the IPS (In-Plane Switching) type liquid crystal display is large, causing the VT curve drift of the VA type liquid crystal display in the case of off-axis. The picture is lowered (color wash-out), and a white phenomenon occurs.
  • the usual way to solve the problem of the big-view character bias is to split the pixel into two parts to improve the purpose of the big-view character bias.
  • the pixels are divided into a main pixel and a sub pixel, and the main pixel is provided with a voltage larger than that required for normal display, and is provided to the sub pixel. Less than the voltage required for normal display.
  • This uses the main pixel and the sub pixel to achieve the purpose of improving the chromaticity of the viewing angle.
  • the above method is based on a pixel unit, and it is easy to form a mesh between a main pixel and a sub pixel.
  • the present application provides an image processing method for a display, which can optimize the chromaticity of the display.
  • the viewing angles of users at different positions are different. Even in a certain position, their viewing angles with respect to the screen have covered more than one angle.
  • the algorithm technology using the angle of view compensation will compensate the color for a certain angle of view.
  • the angle of view of other angles is relatively different. Therefore, the present application proposes an optimized display image processing that can compensate for multiple angles.
  • the viewing angle characteristics, regardless of the size of the display, can be optimally compensated for viewing angles by this application.
  • a technique for using an algorithm to compensate for a chromaticity view angle including the following steps:
  • the main pixel block and the sub-pixel block are arranged one-to-one.
  • the color saturation calculation module calculates a color saturation of the display device screen, and further includes a color gain module that processes the color saturation with a gain.
  • the second selection module adjusts a chromaticity value of a viewable angle in the display device according to the white point coordinate, the high voltage gradation value lookup table, and the low voltage gradation value.
  • One of the lookup tables and the color saturation related parameter are brought into the following formula to calculate the chromaticity value of the viewable angle in the display device:
  • S_gain is the color saturation after gain
  • outB is a number of white point coordinates that adjust the picture of the display device through a gamma module.
  • An image processing structure includes an input module, a gamma module, a high voltage gamma module (H_gamma), and a low voltage A gamma module (L_gamma), a first selection module, a color saturation calculation module, and a second selection module.
  • H_gamma high voltage gamma module
  • L_gamma low voltage A gamma module
  • the input module is configured to obtain a plurality of main pixels and a plurality of sub-pixels of a screen of the display device; the gamma module is used to adjust a plurality of screens of the display device White point coordinate (outB); high voltage gamma module (H_gamma) obtains a high voltage gray value lookup table (H_LUT); low voltage gamma module (L_gamma) obtains a low voltage gray value lookup table (L_LUT); a selection module selectively outputs the high voltage gray value lookup table (H_LUT) and the low voltage gray value according to an arrangement manner of the main pixel and the sub pixel.
  • H_gamma high voltage gray value lookup table
  • L_gamma low voltage gamma module
  • a selection module selectively outputs the high voltage gray value lookup table (H_LUT) and the low voltage gray value according to an arrangement manner of the main pixel and the sub pixel.
  • L_LUT lookup tables
  • S color saturation
  • the second selection module according to the white point coordinates (outB), the high One of the voltage gray value lookup table and the low voltage gray value lookup table (outA) and the color saturation (S) adjust a visual character value in the display device.
  • a color gain module is further included to process the color saturation (S) output gain color saturation (S_gain).
  • the visual role value is:
  • S_gain is the color saturation after gain
  • outB is a number of white point coordinates that adjust the picture of the display device through a gamma module.
  • a display device includes a display panel, and the display panel includes a plurality of pixels for displaying images, including the image processing structure.
  • An optimized image processing technique is proposed by the present application to compensate for multi-angle viewing angle characteristics, and the optimal visual character value can be obtained by the present application regardless of the size of the display.
  • FIG. 1 is a schematic diagram of a screen pixel of a display device divided into a plurality of main pixel blocks and a plurality of sub-pixel blocks according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram of an image processing structure provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a lookup table of color saturation (S)-gain color saturation (S_gain) provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another image processing structure of an embodiment of the present application.
  • FIG. 5 is a flow chart illustrating an image processing method of a display device according to an embodiment of the present application.
  • the word “comprising” is to be understood to include the component, but does not exclude any other component.
  • “on” means located above or below the target component, and does not mean that it must be on the top based on the direction of gravity.
  • FIG. 1 is a schematic diagram of a screen pixel of a display device divided into a plurality of main pixel blocks and a plurality of sub-pixel blocks according to an embodiment of the present disclosure.
  • FIG. 1 lists the basic idea of the present application, which divides a pixel into a main pixel and a sub pixel, and supplies a main pixel with a voltage greater than that required for normal display. Subpixels provide a voltage that is less than what is required for normal display. This uses the main pixel and the sub pixel to achieve the purpose of improving the chromaticity of the viewing angle. However, the above method is based on the pixel unit, and it is easy to form a mesh between the main pixel and the sub pixel. This application mainly solves the grid problem by optimization.
  • the tristimulus value is proposed by the International Commission on illumination (CIE) CIE 1931 XYZ color space (CIE XYZ Color Space), which will be red (R), green (G ), blue (B) three colors as the three primary colors, and all other colors can be formed by mixing the three red (R), green (G), blue (B) primary colors.
  • CIE 1931 XYZ color space is often represented by the CIE 1931 Chromaticity Diagram, which has three parameters in the CIE 1931 chromaticity diagram, where the stimulus value Y represents the brightness.
  • FIG. 2 is a schematic diagram of an image processing structure provided by an embodiment of the present application.
  • the image processing structure includes an input module 110, a gamma module 120, a low voltage gamma module (L_gamma) 130, a high voltage gamma module (H_gamma) 140, and a first
  • the selection module 150, a color saturation calculation module 160, and a second selection module 170 are selected.
  • the input module 110 is configured to obtain a plurality of main pixels and a plurality of sub-pixels of a screen of the display device, and a gamma module 120 for adjusting a screen of the display device.
  • the voltage gamma module (L_gamma) 130 obtains a low voltage gray value lookup table (L_LUT);
  • the high voltage gamma module (H_gamma) 140 obtains a high voltage gray value lookup table (H_LUT);
  • the first selection module 150 Arranging the main pixel and the sub pixel to output the high voltage gray value lookup table (H_LUT) and the low voltage gray value lookup table (L_LUT)
  • color saturation calculation module 160 calculates a color saturation (S) of the display device screen;
  • the second selection module 170 according to the white point coordinates (outB), the high voltage gray value One of the lookup table and the low voltage gray value lookup table (outA) and the color saturation (
  • a color gain module is further included to process the color saturation (S) output gain color saturation (S_gain).
  • the visual role value is:
  • S_gain is the color saturation after gain
  • outB is a number of white point coordinates that adjust the picture of the display device through a gamma module.
  • FIG. 3 is a schematic diagram of a lookup table of color saturation (S)-gain color saturation (S_gain) provided by an embodiment of the present application. As shown in FIG. 3, a corresponding S-S_gain curve of color saturation (S) and gain color saturation (S_gain) is listed. Of course, the inside of the chip is generally used as an editable look-up table (LUT). The curve can be arbitrarily edited based on actual needs.
  • S color saturation
  • S_gain gain color saturation
  • the second selection module 170 selects a gamma module to adjust a plurality of screens of the display device.
  • the gain color saturation (S_gain) is close to 1, and the second selection module 170 selects one of the high voltage gray value lookup table and the low voltage gray value lookup table. (outA), that is, the data is output after the high voltage gamma module (H_gamma) 140 and the low voltage gamma module (L_gamma) 130 to increase the chromaticity angle of view.
  • the chromaticity can be improved by the high voltage gamma module (H_gamma) 140 and the low voltage gamma module (L_gamma) 130 when the chromaticity is high, and the gamma is directly output when the chromaticity is 0.
  • the module (gamma) 120 data ensures that the pure grayscale image is meshless.
  • FIG. 4 is a schematic diagram of another image processing structure of an embodiment of the present application.
  • the image processing structure includes an input module 110, a gamma module 120, a low voltage gamma module (L_gamma) 130, and a high voltage gamma module (H_gamma) 140.
  • the input module 110 is configured to obtain a plurality of main pixels and a plurality of sub-pixels of a screen of the display device, and a gamma module 120 for adjusting a screen of the display device.
  • a number of white point coordinates (outB); a low voltage gamma module (L_gamma) 130 obtains a low voltage gray value lookup table (L_LUT); a high voltage gamma module (H_gamma) 140 obtains a high voltage gray value lookup table ( H_LUT); the first selection module 150 selects and outputs the high voltage gray value lookup table (H_LUT) according to the arrangement manner of the main pixel and the sub pixel.
  • the difference from the structure of FIG. 2 is that in FIG. 2, the gamma module 120 is a plurality of white point coordinates (outB) directly processing the screen of the display device, and the gamma module is shown in FIG. (gamma) 120 is an adjustment second selection module 170 according to the unprocessed original picture white point coordinates (outB), the high voltage gray value lookup table and the low voltage gray value lookup table (outA) and the color saturation (S) adjust a visual character value in the display device.
  • the gamma module 120 is a plurality of white point coordinates (outB) directly processing the screen of the display device
  • the gamma module is shown in FIG. (gamma) 120 is an adjustment second selection module 170 according to the unprocessed original picture white point coordinates (outB), the high voltage gray value lookup table and the low voltage gray value lookup table (outA) and the color saturation (S) adjust a visual character value in the display device.
  • FIG. 5 is a flowchart illustrating an image processing method of a display device according to an embodiment of the present application, with reference to the following description.
  • Step S510 dividing a picture pixel of a display device into a plurality of main pixels and a plurality of sub-pixels.
  • the main pixel and the sub pixel are arranged one-to-one.
  • Step S520 Adjusting a plurality of white point coordinates of the screen of the display device by a gamma module (gamma).
  • Step S530 Obtain a high voltage gray value lookup table (H_LUT) through a high voltage gamma module (H_gamma) and obtain a low voltage gray value lookup table (L_LUT) through a low voltage gamma module (L_gamma).
  • Step S540 Selecting, by using a first selection module, the high voltage gray value lookup table and the low voltage gray value lookup table according to the arrangement manner of the main pixel block and the sub pixel block.
  • the high voltage gray value lookup table (H_LUT) or the low voltage gray value lookup table (L_LUT) is selected according to the arrangement of the main pixel and the sub pixel. If the main pixel block selects the high voltage gray value lookup table (H_LUT), otherwise, if it is a sub pixel block, select the low voltage gray value lookup table (L_LUT).
  • Step S550 Calculating a color saturation of the display device screen through a color saturation calculation module.
  • a color gain module is further included to process the color saturation (S) output gain color saturation (S_gain).
  • Step S560 The second selection module adjusts the display device by using one of the white point coordinates, the high voltage gray value lookup table, and the low voltage gray value lookup table and the color saturation. A visual role value in .
  • S_gain is the color saturation after gain
  • outB is a number of white point coordinates that adjust the picture of the display device through a gamma module.
  • the embodiment of the present application further provides a display device, the display device includes a display panel, and the display panel includes a plurality of pixels for displaying images, including the image processing structure described above.
  • the present application provides a viewing angle compensation algorithm for a display that optimizes the viewing angle characteristics of the display.
  • the viewing angles of users at different positions are different. Even in a certain position, their viewing angles with respect to the screen have covered more than one angle.
  • the algorithm technology using the angle of view compensation will compensate the color for a certain angle of view.
  • the angle of view of other angles is relatively different. Therefore, this application proposes an optimized angle compensation technology that can compensate for multiple angles.
  • the viewing angle characteristics regardless of the size of the display, can be achieved by the present application for the best visual character value.

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Abstract

本申请关于一种显示装置图像处理方法、图像处理结构及显示装置，将显示装置画面分为数个主像素区块及数个子像素区块，通过伽马模块调整显示装置画面的白色点坐标，通过高电压伽马模块及低电压伽马模块分别取得高电压灰度值查找表及低电压灰度值查找表，透过第一选择模块依据主像素区块及子像素区块的排列选择输出高电压灰度值查找表或低电压灰度值查找表透过色彩饱和度计算模块计算显示装置画面的色彩饱和度，第二选择模块依据白色点坐标、高电压灰度值查找表或低电压灰度值查找表及色彩饱和度，调整所述显示装置中的可视角色度值。

Description

显示装置图像处理方法、图像处理结构及显示装置 技术领域
本申请涉及显示领域，尤其涉及一种显示装置图像处理方法、图像处理结构及显示装置。
背景技术
目前的图像处理技术是将液晶面板上的显示区域划分为许多的像素(Pixel)，而每个像素上均具有红、绿、蓝等三原色。由于所有可见光的颜色均可由红(R)、绿(G)、蓝(B)三色光线混合产生，因此通过控制该些红(R)、绿(G)、蓝(B)子像素的明暗，即可建构出一个像素所要表现的色彩，为了更适当地描述色彩，国际照明委员会(International Commission on Illumination，简称CIE)提出了CIE 1931 XYZ色彩空间(CIE XYZ Color Space)。而色彩空间将红、绿和蓝三种颜色作为三种原色，所有其他颜色都可以由三种原色混合形成，而所有的颜色都是以X、Y以及Z三色刺激值，以三种原色不同的比例显示出各种颜色。
液晶显示器(Liquid Crystal Display，LCD)，为平面超薄的显示装置，它由一定数量的彩色或黑白像素组成，放置于光源或者反射板前方。液晶显示器功耗很低，并且具有高画质、体积小、重量轻的特点，因此倍受大家青睐，成为显示器的主流。液晶显示器已广泛使用于各种电子产品中，例如，具显示屏幕的计算机装置、移动电话、或数字相框等，而广视角技术为目前液晶显示器的发展重点之一。然而，当侧看或斜视的视角过大时，广视角液晶显示器常会发生色偏(color shift)现象。
随着显示器的屏幕越来越大的趋势下，显示器的视角特性是显示器颜色优劣的一项重要指标，一般而言，VA(Vertical Alignment liquid crystal)型液晶显示器的视角色度偏差(color difference)，因为液晶晶体的双折射效应不同，会较IPS(In-Plane Switching)型液晶显示器的视角色度偏差大，造成VA型液晶显示器在大视角(off-axis)的情况下V-T曲线漂移导致画面对比降低(color wash-out)，出现偏白的现象的情况发生，
一般而言，通常情况下要解决大视角色偏的方法为将像素拆分为两部分，来改善大视角色偏的目的，但是在分辨率提高的情况下这样对像素分区会导致穿透率降低。此外，将像素分为主像素区块(main pixel)和子像素区块(sub pixel)，给主像素区块(main pixel)提供大于正常显示需要的电压，给子像素区块(sub pixel)提供小于正常显示需要的电压。这样利用主像素区块(main pixel)和子像素区块(sub pixel)混合达到提升色度可视角的目的。但是以上方法基于像素为单位，容易在主像素区块(main pixel)和子像素区块(sub pixel)之间容易形成网格。
发明内容
为了解决上述技术问题，本申请提供一个显示器的图像处理法，可以优化显示器的色度可视角。在液晶显示器越来越大的趋势下，用户在不同位置的观测角度有所不同，即使在某一个位置下，其相对于屏幕的视角，已经涵盖了不只一个角度。一般而言，利用视角补偿的算法技术，会针对某一个视角做颜色的补偿，其他角度的视角相对而言就有所误差，因此，本申请提出一个优化的显示器图像处理，可以补偿多角度的视角特性，不论显示器的尺寸大小为何，都可以藉由本申请进行最佳的色度可视角补偿，
本申请的目的及解决其技术问题采用以下技术方案来实现的，依据本申请的提出一种利用算法来补偿色度可视角的技术，包括以下步骤：
首先，将一显示装置的画面像素分为数个主像素区块及数个子像素区块；通过一伽马模块调整所述显示装置的画面的数个白色点坐标；通过一高电压伽马模块取得一高电压灰度值查找表及通过一低电压伽马模块取得一低电压灰度值查找表；透过一第一选择模块依据所述主像素区块及所述子像素区块的排列方式选择输出所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；透过一色彩饱和度计算模块计算所述显示装置画面的一色彩饱和度；以及，通过所述白色点坐标、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一及所述色彩饱和度，使一第二选择模块调整所述显示装置中的一可视角色度值。
在本申请的实施例中，所述主像素区块及所述子像素区块是一对一间隔排列。
在本申请的实施例中，所述色彩饱和度计算值依据像素为单位，带入下列公式：色彩饱和度S＝max(R、G、B)-min(R、G、B)/max(R、G、B)。
在本申请的实施例中，所述透过一色彩饱和度计算模块计算所述显示装置画面的一色彩饱和度，其中，更包括一色彩增益模块以增益处理所述色彩饱和度。
在本申请的实施例中，所述第二选择模块调整所述显示装置中可视角的色度值依据所述白色点坐标、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一及所述色彩饱和度相关参数带入下列公式，计算出所述调整所述显示装置中可视角的色度值：
data out＝outA*S_gain+outB*(1-S_gain)；
其中，outA为所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
S_gain为增益后的色彩饱和度；
outB为通过一伽马模块调整所述显示装置的画面的数个白色点坐标。
本申请的目的及解决其技术问题还可采用以下技术措施进一步实现。依据本申请提出的一种图像处理结构，包括一输入模块、一伽马模块(gamma)、一高电压伽马模块(H_gamma)、一低电压 伽马模块(L_gamma)、一第一选择模块、一色彩饱和度计算模块以及一第二选择模块。输入模块用以取得一显示装置的画面的数个主像素区块(main pixel)及数个子像素区块(sub pixel)；伽马模块(gamma)用以调整所述显示装置的画面的数个白色点坐标(outB)；高电压伽马模块(H_gamma)取得一高电压灰度值查找表(H_LUT)；低电压伽马模块(L_gamma)取得一低电压灰度值查找表(L_LUT)；第一选择模块依据所述主像素区块(main pixel)及所述子像素区块(sub pixel)的排列方式选择输出所述高电压灰度值查找表(H_LUT)及所述低电压灰度值查找表(L_LUT)其中之一(outA)；色彩饱和度计算模块，计算所述显示装置画面的一色彩饱和度(S)；第二选择模块依据所述白色点坐标(outB)、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一(outA)及所述色彩饱和度(S)调整所述显示装置中的一可视角色度值。
在本申请的实施例中，所述色彩饱和度计算值依据像素为单位，带入下列公式：色彩饱和度S＝max(R、G、B)-min(R、G、B)/max(R、G、B)。
在本申请的实施例中，更包括一色彩增益模块以处理所述色彩饱和度(S)输出增益色彩饱和度(S_gain)。
在本申请的实施例中，所述可视角色度值：
data out＝outA*S_gain+outB*(1-S_gain)；
其中，outA为所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
S_gain为增益后的色彩饱和度；
outB为通过一伽马模块调整所述显示装置的画面的数个白色点坐标。
本申请的目的及解决其技术问题更可采用以下技术措施进一步实现。依据本申请提出的一种显示装置，所述显示装置包括一显示面板，所述显示面板包含多个像素，用以显示影像，包括上述图像处理结构。
透过本申请提出一个优化的图像处理技术，可以补偿多角度的视角特性，不论显示器的尺寸大小为何，都可以藉由本申请取得最佳的可视角色度值。
附图说明
图1是本申请实施例提供的显示装置画面像素分为数个主像素区块及数个子像素区块示意图。
图2是本申请实施例提供的图像处理结构示意图。
图3是本申请实施例提供的色彩饱和度(S)-增益色彩饱和度(S_gain)的查找表示意图。
图4是本申请实施例的另一图像处理结构示意图。
图5是本申请提供的一实施例说明一种显示装置图像处理方法的流程图。
具体实施方式
以下各实施例的说明是参考附加的图式，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。
附图和说明被认为在本质上是示出性的，而不是限制性的。在图中，结构相似的单元是以相同标号表示。另外，为了理解和便于描述，附图中示出的每个组件的尺寸和厚度是任意示出的，但是本申请不限于此。
另外，在说明书中，除非明确地描述为相反的，否则词语“包括”将被理解为意指包括所述组件，但是不排除任何其它组件。此外，在说明书中，“在......上”意指位于目标组件上方或者下方，而不意指必须位于基于重力方向的顶部上。
为更进一步阐述本申请为达成预定申请目的所采取的技术手段及功效，以下结合附图及实施例，对依据本申请提出的显示装置图像处理方法、图像处理结构及显示装置，其具体实施方式、结构、特征及其功效，详细说明如后。
图1是本申请实施例提供的显示装置画面像素分为数个主像素区块及数个子像素区块示意图。图1列出了本申请的基本思路,将像素分为主像素区块(main pixel)和子像素区块(sub pixel)，给主像素区块(main pixel)提供大于正常显示需要的电压，给子像素区块(sub pixel)提供小于正常显示需要的电压。这样利用主像素区块(main pixel)和子像素区块(sub pixel)混合达到提升色度可视角的目的。但是以上方法基于像素为单位，容易在主像素区块(main pixel)和子像素区块(sub pixel)之间容易形成网格，本申请主要通过优化解决网格问题。
在本实施例中，三色刺激值透过由国际照明委员会(International Commission on illumination，CIE)提出了CIE 1931 XYZ色彩空间(CIE XYZ Color Space)，该色彩空间将红(R)、绿(G)、蓝(B)三种颜色作为三种原色，而所有其他颜色都可以由这三种红(R)、绿(G)、蓝(B)原色混合形成。CIE 1931 XYZ色彩空间常以CIE 1931色度图(CIE 1931 Chromaticity Diagram)来表示，CIE 1931色度图中具有三个参数，其中刺激值Y表示明度。
图2是本申请实施例提供的图像处理结构示意图。如图2所示，图像处理结构，包括一输入模块110、一伽马模块(gamma)120、一低电压伽马模块(L_gamma)130、一高电压伽马模块(H_gamma)140、一第一选择模块150、一色彩饱和度计算模块160以及一第二选择模块170。
输入模块110用以取得一显示装置的画面的数个主像素区块(main pixel)及数个子像素区块(sub pixel)；伽马模块(gamma)120用以调整所述显示装置的画面的数个白色点坐标(outB)；低 电压伽马模块(L_gamma)130取得一低电压灰度值查找表(L_LUT)；高电压伽马模块(H_gamma)140取得一高电压灰度值查找表(H_LUT)；第一选择模块150依据所述主像素区块(main pixel)及所述子像素区块(sub pixel)的排列方式选择输出所述高电压灰度值查找表(H_LUT)及所述低电压灰度值查找表(L_LUT)其中之一(outA)；色彩饱和度计算模块160计算所述显示装置画面的一色彩饱和度(S)；第二选择模块170依据所述白色点坐标(outB)、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一(outA)及所述色彩饱和度(S)调整所述显示装置中的一可视角色度值。
在本实施例中，色彩饱和度计算值依据像素为单位，带入下列公式：色彩饱和度S＝max(R、G、B)-min(R、G、B)/max(R、G、B)。
在本实施例中，更包括一色彩增益模块以处理所述色彩饱和度(S)输出增益色彩饱和度(S_gain)。
在本实施例中，所述可视角色度值：
其中，outA所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
S_gain为增益后的色彩饱和度；
outB为通过一伽马模块调整所述显示装置的画面的数个白色点坐标。
图3是本申请实施例提供的色彩饱和度(S)-增益色彩饱和度(S_gain)的查找表示意图。如图3所示，列举了一种色彩饱和度(S)和增益色彩饱和度(S_gain)的对应关系S-S_gain曲线，当然芯片内部一般作为可编辑的查找表(Look-Up Table，LUT),曲线可以根基实际需求任意编辑。
通过图2及图3的处理方式，具有下列的优点：
1.当所输入图像色彩饱和度(S)很低时，增益色彩饱和度(S_gain)接近与0，第二选择模块170选择伽马模块(gamma)用以调整所述显示装置的画面的数个白色点坐标(outB)，也就是数据经过伽马模块(gamma)后直接输出，数据不经过高电压伽马模块(H_gamma)140和低电压伽马模块(L_gamma)130不会形成网格。
2.当输入图像饱和度很高时，增益色彩饱和度(S_gain)接近与1，第二选择模块170选择所述高电压灰度值查找表及所述低电压灰度值查找表其中之一(outA)，也就是数据经过高电压伽马模块(H_gamma)140和低电压伽马模块(L_gamma)130后输出，以提高色度可视角。
基于以上方法可以实现：当色度很高时可以通过高电压伽马模块(H_gamma)140和低电压伽马模块(L_gamma)130提升色度可视角，当色度为0时，直接输出伽马模块(gamma)120数据，保证纯灰度图像无网格。
图4是本申请实施例的另一图像处理结构示意图。如图4所示，图像处理结构，包括一输入模块110、一伽马模块(gamma)120、一低电压伽马模块(L_gamma)130、一高电压伽马模块(H_gamma)140、 一第一选择模块150、一色彩饱和度计算模块160以及一第二选择模块170。输入模块110用以取得一显示装置的画面的数个主像素区块(main pixel)及数个子像素区块(sub pixel)；伽马模块(gamma)120用以调整所述显示装置的画面的数个白色点坐标(outB)；低电压伽马模块(L_gamma)130取得一低电压灰度值查找表(L_LUT)；高电压伽马模块(H_gamma)140取得一高电压灰度值查找表(H_LUT)；第一选择模块150依据所述主像素区块(main pixel)及所述子像素区块(sub pixel)的排列方式选择输出所述高电压灰度值查找表(H_LUT)及所述低电压灰度值查找表(L_LUT)其中之一(outA)；色彩饱和度计算模块160计算所述显示装置画面的一色彩饱和度(S)；第二选择模块170依据所述白色点坐标(outB)、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一(outA)及所述色彩饱和度(S)调整所述显示装置中的一可视角色度值。
在本实施例中，与图2结构差异在于，在图2中伽马模块(gamma)120是直接处理所述显示装置的画面的数个白色点坐标(outB)，在图4中伽马模块(gamma)120则是调整第二选择模块170依据所述未经处理的原始画面白色点坐标(outB)、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一(outA)及所述色彩饱和度(S)调整所述显示装置中的一可视角色度值。
图5是本申请提供的一实施例说明一种显示装置图像处理方法的流程图，参考如下说明。
步骤S510：将一显示装置的画面像素分为数个主像素区块(main pixel)及数个子像素区块(sub pixel)。
在本实施例中，所述主像素区块(main pixel)及所述子像素区块(sub pixel)是一对一间隔排列。
步骤S520：通过一伽马模块(gamma)调整所述显示装置的画面的数个白色点坐标。
步骤S530：通过一高电压伽马模块(H_gamma)取得一高电压灰度值查找表(H_LUT)及通过一低电压伽马模块(L_gamma)取得一低电压灰度值查找表(L_LUT)。
步骤S540：透过一第一选择模块依据所述主像素区块及所述子像素区块的排列方式选择输出所述高电压灰度值查找表及所述低电压灰度值查找表其中之一。
在本实施例中，依照主像素区块(main pixel)及子像素区块(sub pixel)的排列方式选择高电压灰度值查找表(H_LUT)或低电压灰度值查找表(L_LUT)，若是主像素区块(main pixel)选择高电压灰度值查找表(H_LUT)，反之，若是子像素区块(sub pixel)则选择低电压灰度值查找表(L_LUT)。
步骤S550：透过一色彩饱和度计算模块计算所述显示装置画面的一色彩饱和度。
在本实施例中，色彩饱和度计算值依据像素为单位，带入下列公式：色彩饱和度S＝max(R、G、B)-min(R、G、B)/max(R、G、B)。
本申请的实施例中，更包括一色彩增益模块以处理所述色彩饱和度(S)输出增益色彩饱和度(S_gain)。
步骤S560：通过所述白色点坐标、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一及所述色彩饱和度，使一第二选择模块调整所述显示装置中的一可视角色度值。
所述可视角色度值：
data out＝outA*S_gain+outB*(1-S_gain)。
其中，outA所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
S_gain为增益后的色彩饱和度；
outB为通过一伽马模块调整所述显示装置的画面的数个白色点坐标。
本申请实施例还提供一种显示装置，所述显示装置包括一显示面板，所述显示面板包含多个像素，用以显示影像，包括上述的图像处理结构。
综上所述，本申请提供一个显示器的视角补偿算法，可以优化显示器的视角特性。在液晶显示器越来越大的趋势下，用户在不同位置的观测角度有所不同，即使在某一个位置下，其相对于屏幕的视角，已经涵盖了不只一个角度。一般而言，利用视角补偿的算法技术，会针对某一个视角做颜色的补偿，其他角度的视角相对而言就有所误差，因此，本申请提出一个优化的视角补偿技术，可以补偿多角度的视角特性，不论显示器的尺寸大小为何，都可以藉由本申请取得最佳的可视角色度值。
“在本申请一实施例中”与“在各种实施例中”等用语被重复地使用。所述用语通常不是指相同的实施例；但它亦可以是指相同的实施例。“包含”、“具有”及“包括”等用词是同义词，除非其前后文意显示出其它意思。
以上所述，仅是本申请的实施例而已，并非对本申请作任何形式上的限制，虽然本申请已以实施例揭露如上，然而幷非用以限定本申请，任何熟悉本专业的技术人员，在不脱离本申请技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本申请技术方案的内容，依据本申请的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属本申请技术方案的范围内。

Claims (15)

  1. 一种显示装置图像处理方法，包括以下步骤：
    将一显示装置的画面像素分为数个主像素区块及数个子像素区块；
    通过一伽马模块调整所述显示装置的画面的数个白色点坐标；
    通过一高电压伽马模块取得一高电压灰度值查找表及通过一低电压伽马模块取得一低电压灰度值查找表；
    透过一第一选择模块依据所述主像素区块及所述子像素区块的排列方式选择输出所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
    透过一色彩饱和度计算模块计算所述显示装置画面的一色彩饱和度；以及
    通过所述白色点坐标、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一及所述色彩饱和度，使一第二选择模块调整所述显示装置中的一可视角色度值。
  2. 如权利要求1所述的显示装置图像处理方法，其中，所述主像素区块及所述子像素区块是一对一间隔排列。
  3. 如权利要求1所述的显示装置图像处理方法，其中，所述色彩饱和度计算值依据像素为单位，带入下列公式：
    色彩饱和度S＝max(R、G、B)-min(R、G、B)/max(R、G、B)。
  4. 如权利要求1所述的显示装置图像处理方法，更包括一色彩增益模块，以增益处理所述色彩饱和度。
  5. 如权利要求1所述的显示装置图像处理方法，其中，所述第二选择模块调整所述显示装置中可视角的色度值依据所述白色点坐标、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一及所述色彩饱和度相关参数带入下列公式，计算出所述调整所述显示装置中可视角的色度值：
    data out＝outA*S_gain+outB*(1-S_gain)；
    其中，outA为所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
    S_gain为增益后的色彩饱和度；
    outB为通过一伽马模块调整所述显示装置的画面的数个白色点坐标。
  6. 一种图像处理结构，包含：
    一输入模块，用以取得一显示装置的画面的数个主像素区块及数个子像素区块；
    一伽马模块，用以调整所述显示装置的画面的数个白色点坐标；
    一高电压伽马模块，用以取得一高电压灰度值查找表；
    一低电压伽马模块，用以取得一低电压灰度值查找表；
    一第一选择模块，依据所述主像素区块及所述子像素区块的排列方式选择输出所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
    一色彩饱和度计算模块，计算所述显示装置画面的一色彩饱和度；以及
    一第二选择模块，依据所述白色点坐标、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一及所述色彩饱和度调整所述显示装置中的一可视角色度值。
  7. 如权利要求6所述的图像处理结构，其中，所述色彩饱和度计算值依据像素为单位，带入下列公式：
    色彩饱和度S＝max(R、G、B)-min(R、G、B)/max(R、G、B)。
  8. 如权利要求6所述的图像处理结构，更包括一色彩增益模块以增益处理所述色彩饱和度。
  9. 如权利要求6所述的图像处理结构，其中，所述可视角色度值：
    data out＝outA*S_gain+outB*(1-S_gain)；
    其中，outA为所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
    S_gain为增益后的色彩饱和度；
    outB为通过一伽马模块调整所述显示装置的画面的数个白色点坐标。
  10. 如权利要求6所述的图像处理结构，其中，所述主像素区块及所述子像素区块是一对一间隔排列。
  11. 一种显示装置，所述显示装置包括一显示面板，所述显示面板包含多个像素，用以显示影像，包括一图像处理结构，所述图像处理结构包括：
    一输入模块，用以取得一显示装置的画面的数个主像素区块及数个子像素区块；
    一伽马模块，用以调整所述显示装置的画面的数个白色点坐标；
    一高电压伽马模块，用以取得一高电压灰度值查找表；
    一低电压伽马模块，用以取得一低电压灰度值查找表；
    一第一选择模块，依据所述主像素区块及所述子像素区块的排列方式选择输出所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
    一色彩饱和度计算模块，计算所述显示装置画面的一色彩饱和度；以及
    一第二选择模块，依据所述白色点坐标、所述高电压灰度值查找表及所述低电压灰度值查找表其中之一及所述色彩饱和度调整所述显示装置中的一可视角色度值。
  12. 如权利要求11所述的显示装置，其中，所述主像素区块及所述子像素区块是一对一间隔排列。
  13. 如权利要求11所述的显示装置，其中，所述色彩饱和度计算值依据像素为单位，带入下列公式：
    色彩饱和度S＝max(R、G、B)-min(R、G、B)/max(R、G、B)。
  14. 如权利要求11所述的显示装置，更包括一色彩增益模块，以增益处理所述色彩饱和度。
  15. 如权利要求11所述的显示装置，其中，所述可视角色度值：
    data out＝outA*S_gain+outB*(1-S_gain)；
    其中，outA为所述高电压灰度值查找表及所述低电压灰度值查找表其中之一；
    S_gain为增益后的色彩饱和度；
    outB为通过一伽马模块调整所述显示装置的画面的数个白色点坐标。
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