WO2017101191A1 - 像素渲染方法、像素渲染装置及显示装置 - Google Patents

像素渲染方法、像素渲染装置及显示装置 Download PDF

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WO2017101191A1
WO2017101191A1 PCT/CN2016/070911 CN2016070911W WO2017101191A1 WO 2017101191 A1 WO2017101191 A1 WO 2017101191A1 CN 2016070911 W CN2016070911 W CN 2016070911W WO 2017101191 A1 WO2017101191 A1 WO 2017101191A1
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primary color
pixel
color components
component
image pixel
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PCT/CN2016/070911
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English (en)
French (fr)
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郭星灵
李曼
邢振周
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武汉华星光电技术有限公司
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Priority to US14/916,991 priority Critical patent/US20180047350A1/en
Publication of WO2017101191A1 publication Critical patent/WO2017101191A1/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
    • G09G3/2003—Display 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • 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
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/04—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using circuits for interfacing with colour displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0457—Improvement of perceived resolution by subpixel rendering
    • 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 relates to the field of display technologies, and in particular, to a pixel rendering method, a pixel rendering device, and a display device.
  • Digital images typically include a number of image pixels, each image pixel having a finite number of discrete color values.
  • these color values are grayscale values of the red, green, and blue components in the red, green, and blue (RGB, Red Green Blue) color space.
  • the digital image can be displayed on the display by driving a plurality of screen pixels arranged in an array on the display according to the digital image.
  • one sub-pixel is used to display the value of one color component in the image pixel.
  • it is necessary to display more image pixels that is, it is necessary to increase the number of sub-pixels on the display screen.
  • a sub-pixel rendering (SPR) method as shown in FIG. 1 is adopted, in which pixel rendering is a method of optimizing screen physics by pixel rendering.
  • SPR sub-pixel rendering
  • the existing pixel rendering processing method is: when three pixels are compressed to one pixel, a sub-pixel of one color class is extracted from each of three pixels, for example, a single sub-pixel is a minimum unit.
  • the SPR method can render the High resolution image to a low resolution image with high degree of reduction, it is easy to see that the pixel compression of the sub-pixel multiplexed rendering is one-third of the original pixel. It will lose more sub-pixels and image details, which will cause serious image gelatinization.
  • the invention relates to a pixel rendering method and a pixel rendering device, which reduce sub-pixels and image details lost during pixel rendering and avoid image pasting.
  • the invention also provides a display device.
  • a pixel rendering method comprising: acquiring grayscale values of three primary color components RGB of an original image pixel RGBW; converting grayscale values of three primary color components of the original image pixel into three primary color components and initial compensation components of the compensated image pixels Grayscale value; sampling the compensated image, each pixel of the compensated image includes a plurality of sets of pixels consisting of two adjacent compensated image pixels, and extracts the first two primary color components of the previous compensated image pixel in each set a third primary color component of the latter image pixel and a grayscale value of the compensation component; the first primary color component of the previous compensated image pixel in each group and the third primary color component of the latter compensated image pixel are extracted
  • the grayscale value of the compensation component is set to a grayscale value of each corresponding subpixel in each row of screen pixels.
  • the compensation component of the compensated image pixel is a white component.
  • the line resolution of the original image is twice the resolution of the display image line.
  • the grayscale value of the three primary color components of the original image pixel is calculated according to the maximum value of the grayscale value of the three primary color components of the original image pixel and the grayscale value of the compensation component.
  • a pixel rendering apparatus comprising: an extracting unit configured to acquire grayscale values of three primary color components of an original image pixel in an RGBW color space; and a converting unit configured to grayscale the three primary color components of the original image pixel The value is converted into a grayscale value that compensates for the three primary color components of the image pixel and the compensation component; a sampling unit configured to sample the compensated image and sample the compensated image, the compensated image includes multiple sets of pixels in each row of pixels Neighbor compensation image pixel composed of pixel groups, extract each The first two primary color components of the previous compensated image pixel and the third primary color component of the latter compensated image pixel and the grayscale value of the compensated component; a multiplexing unit configured to extract the previous one of each of the groups The grayscale values of the first two primary color components of the compensated image pixel and the third primary color component of the latter compensated image pixel and the compensated component are set to the grayscale value of each of the corresponding subpixels in each row of screen pixels.
  • the converting unit is further configured to: determine a grayscale value of the compensation component according to a saturation of the original image pixel and a minimum value of the grayscale value of the three primary color components; and a maximum value of the grayscale value of the three primary color components according to the original image pixel
  • the gray scale value of the component is compensated, and the gray scale value of the three primary color components of the compensated image pixel is calculated.
  • the compensation component of the compensated image pixel is a white component.
  • a display device comprising the pixel rendering device; a display panel provided with a plurality of rows of screen pixels, the screen pixels comprising three primary color sub-pixels and compensation sub-pixels, the three primary colors in each row of screen pixels Sub-pixels and compensation sub-pixels are alternately arranged; a scan driving circuit configured to cyclically drive each row of screen pixels; and a data driving circuit configured to receive grayscale values of respective sub-pixels in each row of screen pixels from the pixel rendering device, And provide the corresponding sub-pixels in the screen pixels.
  • the first two primary color components of the previous compensated image pixel in each group and the third primary color component of the latter compensated image pixel are extracted in the original image pixel. Determining the grayscale value of the component, and in the subsequent multiplexing process, extracting the first two primary color components of the previous compensated image pixel in each group and the third primary color component of the latter compensated image pixel and the compensated component
  • the grayscale value is set to the grayscale value of each corresponding sub-pixel in each row of screen pixels, which is good to avoid losing more sub-pixels and image details, and the data loss amount is from the original three-thirds of the prior art.
  • the second is reduced to one-half, so it is possible to avoid the phenomenon of serious image gelatinization.
  • FIG. 1 is a schematic diagram of a principle of a sub-pixel rendering method in the prior art.
  • FIG. 2 is a flow chart showing the steps of the pixel rendering method of the present invention.
  • FIG. 3 is a schematic diagram of pixel sampling and multiplexing of the present invention.
  • FIG. 4 is a block diagram of a pixel rendering apparatus of the present invention.
  • a preferred embodiment of the present invention provides a pixel rendering method, which is mainly used for sampling and multiplexing row pixels of a high-resolution original image to implement compression of the original image to adapt.
  • the physical resolution of the display screen It includes:
  • step S1 a high-resolution original image is provided, and grayscale values of the three primary color components of the original image pixel RGB are obtained.
  • the grayscale values of the three primary color components refer to the grayscale values of the red component (R), the green component (G), and the blue component (B).
  • the example of Fig. 3 shows four original image pixels M-1, M, M+1 and N-1 successively arranged in each line of the original image, each pixel being represented as a grayscale value of the three primary color components (R , G, B).
  • step S2 the original image is converted into a compensated image.
  • the grayscale values of the three primary color components of the original image pixels (R, G, B) are converted into grayscale values of the three primary color components (R', G', B') of the compensated image pixels and the initial compensation component W.
  • the transmittance and mixing efficiency of the display screen based on the RGB light mixing mode are low, resulting in a darkness of the image actually displayed on the screen, and the compensation component of the compensated image pixels added in this step can improve the brightness of the display screen.
  • the compensation component W can be a white component, a yellow component, a cyan component, or a magenta component.
  • the calculation process of the components in the compensated image in the embodiment is described by taking the compensation component W as a white component as an example.
  • the maximum value of the gray level values of the three primary color components (R, G, B) in the original image pixel is expressed as Max (R, G, B), and the minimum value is expressed as Min (R, G, B).
  • the saturation S of the original image pixel is expressed as:
  • the grayscale value of the compensation component is determined according to the saturation of the original image pixel and the grayscale value of the three primary color components (R, G, B).
  • the initial compensation component in the compensated image pixel is expressed as:
  • the gray scale value of the three primary color components (R, G, B) of the compensated image pixel is then calculated.
  • the three primary color components in the compensated image pixels are represented as:
  • the above processing method of the present embodiment reduces the values of the three primary color components (R', G', B') while reducing the value of the compensation component W. Overall reduce the power consumption of the display panel. Moreover, it is possible to increase the components of the three primary color components of the actual display image, compensate for the decrease in display luminance caused by the reduction of the values of the three primary color components, and maintain the brightness of the display screen.
  • each pixel of the compensated image includes a plurality of sets of pixels consisting of two adjacent compensated image pixels, and the first compensated image pixel in each set is extracted.
  • taking two groups as an example, respectively, M-1, M, M+1, and N-1 extracting the first two primary color components (R', G') of the compensated image pixel M-1, and The latter two primary color components of the compensated image pixel M are extracted, respectively being the primary color B' and the compensation component W.
  • Step S4 setting the grayscale values of the first two primary color components of the previous compensated image pixel and the third primary color component of the latter compensated image pixel and the compensation component in each group to be corresponding to each row of screen pixels.
  • the grayscale value of each subpixel That is, the first two primary color components (R', G') of M-1, the primary color B' of the compensated image pixel M and the compensation component W are multiplexed into the screen pixel C as one RGBW sub-pixel.
  • the first two primary color components (R', G') of the image pixel M+1 are compensated,
  • the primary color B' and the compensation component W of N-1 and N-1 are respectively loaded onto the RGBW sub-pixels of the screen pixel D, thereby obtaining display data of the screen image pixels C and D shown in Fig. 4.
  • the first two primary color components of the previous compensated image pixel and the third primary color component of the latter compensated image pixel in each set are extracted from the original image pixels and said Compensating the grayscale value of the component, and in the subsequent multiplexing process, extracting the first two primary color components of the previous compensated image pixel in each group and the third primary color component of the latter compensated image pixel and the gray of the compensated component
  • the step value is set to the grayscale value of each corresponding sub-pixel in each line of the screen pixel, which not only can complete the sub-pixel multiplexing rendering well, but also can well avoid losing more sub-pixels and image details, and
  • the amount of data loss is reduced from the original two-thirds of the prior art to one-half, so that the phenomenon of causing image gelatinization can be avoided, and the image quality of image processing is greatly improved.
  • the line resolution of the original image is twice the resolution of the display image line.
  • the saturation of the original image pixel and the grayscale value of the three primary color components are further The minimum value determines the grayscale value of the compensation component; the grayscale value of the three primary color components of the compensated image pixel is calculated according to the maximum value of the grayscale value of the three primary color components of the original image pixel and the grayscale value of the compensation component.
  • the present invention also provides a pixel rendering apparatus, comprising:
  • Extraction unit 10 which is arranged to obtain the original image pixels in a three primary color components RGB color space RGBW 1 grayscale values.
  • Conversion unit 20 which is provided to convert the raw image pixel RGBW three primary color components of an RGB image to compensate for the grayscale value of three primary color components of the pixels (R ', G', B ') and a compensating component W grayscale value.
  • a sampling unit 30 configured to sample the compensated image, the pixels of each line of the compensated image comprising a plurality of sets of pixels consisting of two adjacent compensated image pixels, and extracting the first two primary colors of the previous compensated image pixels in each set The (R', G') component and the third primary color component B' of the latter compensated image pixel and the grayscale value of the compensated component W.
  • a multiplexing unit 40 configured to set the grayscale value of the first two primary color components of the previous compensated image pixel and the third primary color component of the latter compensated image pixel and the compensation component to each The grayscale value of the corresponding subpixel in the row screen pixel.
  • the converting unit 20 is further configured to: according to the saturation of the original image pixel and the three bases The minimum value of the gray component value of the color component determines the grayscale value of the compensation component; the grayscale value of the three primary color components of the compensated image pixel is calculated according to the maximum value of the grayscale value of the three primary color components of the original image pixel and the grayscale value of the compensation component.
  • the invention also provides a display device comprising the pixel rendering device, the display panel, the scan driving circuit and the data driving circuit.
  • the display panel is provided with a plurality of rows of screen pixels, the screen pixels including (R, G, B) sub-pixels and compensating sub-pixels W, the (R, G, B) sub-pixels and compensation in each row of screen pixels
  • the sub-pixels W 2 are alternately arranged.
  • the scan drive circuit is arranged to cyclically drive each row of screen pixels.
  • the data driving circuit is configured to receive grayscale values of respective sub-pixels in each row of screen pixels from the pixel rendering device and provide to respective sub-pixels in the screen pixels. Display the rendered image on the display panel.

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Abstract

一种像素渲染方法，包括：获取原始图像像素的三基色分量的灰阶值；将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和初始补偿分量的灰阶值；对补偿图像进行采样，提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值；将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值。该像素渲染方法避免丢掉较多子像素与图像细节，并且其数据丢失量从现有技术中原来的三分之二减少为二分之一，因此能够避免出现造成图像糊化严重的现象。

Description

像素渲染方法、像素渲染装置及显示装置
本发明要求2015年12月18日递交的发明名称为“像素渲染方法、像素渲染装置及显示装置”的申请号201510964317.1的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及显示技术领域，具体地说，涉及一种像素渲染方法、像素渲染装置和显示装置。
背景技术
数字图像通常包括有若干个图像像素，每一图像像素具有有限个离散的颜色数值。例如，这些颜色数值是在红绿蓝(RGB，Red Green Blue)色彩空间的红色分量、绿色分量和蓝色分量的灰阶数值。根据数字图像对显示器上呈阵列式排布的多个屏幕像素进行驱动，即可将数字图像显示在显示器上。
按照传统的子像素驱动方法进行显示时，一个子像素用于显示图像像素中一个颜色分量的数值。为了提高显示器的分辨率，需要显示更多的图像像素，也就是说需要增加显示屏幕上子像素的数量。然而，由于制作工艺的限制，当显示屏幕上的子像素数量达到一定程度之后，难以继续增加。这导致显示器的分辨率难以继续提升。
因此，现有技术中往往需要在低分辨率的显示器上显示高分辨率的数字图像，并且保证显示出来的数字图像的空间分辨率和清晰度。为了在低分辨率的显示器上显示高分辨率的数字图像，采用如图1所示的子像素渲染(Subpixel rendering，简称SPR)的方法，其中，像素渲染是一种通过像素渲染去优化屏幕物理性质、增加液晶显示器(LCD)或有机发光二极管(OLED)的表观分辨率的一种方法。如图1所示，现有的像素渲染处理方法为：由三个像素压缩到一个像素时，是从三个像素中各提取一个色类的子像素，例如：以单个子像素为最小单位，如果是以RGB像素重复方式，以各行3j-1个绿色像素为中心提取，相邻左边的像素提取R红色像素，相邻右边的像素提取B红色像素，这样的 SPR做法虽然可以高还原度的将High resolution image渲染为low resolution image，但我们容易可以看出，其子像素复用渲染后的屏幕像素压缩量为原画素的三分之一，这样的做法是会丢掉较多子像素与图像细节，会造成图像糊化严重的现象。
发明内容
本发明涉及一种像素渲染方法、像素渲染装置，减少像素渲染时丢掉的子像素与图像细节，避免图像糊化。
本发明还提供一种显示装置。
提供一种像素渲染方法，其包括：获取原始图像像素RGBW的三基色分量RGB的灰阶值；将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和初始补偿分量的灰阶值；对补偿图像进行采样，补偿图像的每行像素中包括多组由两个相邻补偿图像像素组成的像素组，提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值；将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值。
其中，所述补偿图像像素的补偿分量为白色分量。
其中，原始图像的行分辨率是显示图像行分辨率的二倍。
其中，在将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和补偿分量的灰阶值的步骤中，根据原始图像像素的饱和度和三基色分量灰阶值的最小值确定补偿分量的灰阶值；根据原始图像像素的三基色分量灰阶值的最大值和补偿分量的灰阶值，计算补偿图像像素三基色分量的灰阶值。
提供一种像素渲染装置，其包括：提取单元，其设置为获取原始图像像素在RGBW色彩空间的三基色分量的灰阶值；转换单元，其设置为将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和补偿分量的灰阶值；采样单元，其设置为对补偿图像进行采样，对补偿图像进行采样，补偿图像的每行像素中包括多组由两个相邻补偿图像像素组成的像素组，提取每 组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值；复用单元，其设置为将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值。
其中，所述转换单元还用于：根据原始图像像素的饱和度和三基色分量灰阶值的最小值确定补偿分量的灰阶值；根据原始图像像素的三基色分量灰阶值的最大值和补偿分量的灰阶值，计算补偿图像像素三基色分量的灰阶值。
其中，所述补偿图像像素的补偿分量为白色分量。
提供一种显示装置，其包括所述的像素渲染装置；显示面板，其设置有若干行屏幕像素，所述屏幕像素包括三基色子像素和补偿子像素，在每行屏幕像素中所述三基色子像素和补偿子像素交替排布；扫描驱动电路，其设置为循环驱动每行屏幕像素；数据驱动电路，其设置从所述像素渲染装置接收每行屏幕像素中各个子像素的灰阶值，并提供至屏幕像素中相应子像素。
本发明的像素渲染方法在对补偿图像进行采样的过程中，是在原始图像像素中提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值，并且在随后的复用过程中，将提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值，很好的避免丢掉较多子像素与图像细节，并且其数据丢失量从现有技术中原来的三分之二减少为二分之一，因此能够避免出现造成图像糊化严重的现象。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中子像素渲染方法的原理示意图。
图2是本发明的像素渲染方法的步骤流程图。
图3是本发明的像素采样和复用的原理图。
图4是本发明的像素渲染装置的模块示意图。
具体实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述。
请参阅图2与图3，本发明的较佳实施例提供了一种像素渲染方法，主要用于对高分辨率原始图像的行像素进行采样和复用，实现对原始图像的压缩，以适应显示器屏幕的物理分辨率。其包括：
步骤S1，提供高分辨率的原始图像，获取原始图像像素RGB的三基色分量的灰阶值。
其中，三基色分量的灰阶值是指红色分量(R)、绿色分量(G)和蓝色分量(B)的灰阶值。图3的示例显示了在原始图像每行中连续排布的四个原始图像像素M-1，M，M+1和N-1，每一像素均表示为三基色分量的灰阶值(R，G，B)。
步骤S2，将原始图像转换为补偿图像。具体为，将原始图像像素(R，G，B)的三基色分量的灰阶值转换为补偿图像像素的三基色分量(R’，G’，B’)和初始补偿分量W的灰阶值。通常情况下，基于RGB混光方式的显示屏幕的穿透率和混合效率较低，导致屏幕上实际显示的图像亮度较暗，而本步骤加入的补偿图像像素的补偿分量可改善显示屏幕的亮度。补偿分量W可以为白色分量、黄色分量、青色分量或者品红色分量。
本实施例中以补偿分量W为白色分量为例，说明本实施例中补偿图像中各个分量的计算过程。
原始图像像素中三基色分量(R，G，B)灰阶值的最大值表示为Max(R，G，B)，最小值表示为Min(R，G，B)。原始图像像素的饱和度S表示为：
S＝[Max(R，G，B)-Min(R，G，B)]/Max(R，G，B)           (1)
先根据原始图像像素的饱和度和三基色分量(R，G，B)的灰阶值确定补偿分量的灰阶值。补偿图像像素中的初始补偿分量表示为：
W＝Min(R，G，B)*(1-S)                 (2)
再计算补偿图像像素的三基色分量(R，G，B)的灰阶值。补偿图像像素中的三基色分量表示为：
R’＝[Max(R，G，B)+W]/Max(R，G，B)*R-W
G’＝[Max(R，G，B)+W]/Max(R，G，B)*G-W                 (3)
B’＝[Max(R，G，B)+W]/Max(R，G，B)*B-W
以红色分量为例：
Figure PCTCN2016070911-appb-000001
由于
Figure PCTCN2016070911-appb-000002
因此，R’＜R。类似地可以得到G’＜G，B’＜B。
所以，与传统的RGB数据到RGBW数据的转换方式相比，本实施例的上述处理方式在降低补偿分量W数值的同时，降低了三基色分量(R’，G’，B’)的数值，总体上降低显示面板的功耗。并且，能够增加实际显示图像的三基色分量的成分，对三基色分量数值减少造成的显示亮度降低进行补偿，可以保持显示屏幕亮度不变。
复参图3与图4，步骤S3中对补偿图像进行采样，补偿图像的每行像素中包括多组由两个相邻补偿图像像素组成的像素组，提取每组中前一个补偿图像像素的前两个基色分量(R’，G’)和后一个补偿图像像素的第三基色分量B’与所述补偿分量W的灰阶值。本实施例中，以两组为例说明，分别为M-1，M，M+1和N-1，提取补偿图像像素M-1的前两个基色分量(R’，G’)，并提取补偿图像像素M的后两个基色分量，分别为基色B’与补偿分量W。
步骤S4，将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值。也就是说，将M-1的前两个基色分量(R’，G’)，补偿图像像素M的基色B’与补偿分量W复用到屏幕像素C中作为一个RGBW子像素。同理，补偿图像像素M+1的前两个基色分量(R’，G’)， 和N-1的基色B’与补偿分量W分别加载到屏幕像素D的RGBW子像素上，从而得到图4所示的屏幕图像像素C和D的显示数据。
在上文所述的对补偿图像进行采样的过程中，是在原始图像像素中提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值，并且在随后的复用过程中，将提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值，不仅能很好的完成子像素复用渲染，且能很好的避免丢掉较多子像素与图像细节，并且其数据丢失量从现有技术中原来的三分之二减少为二分之一，因此能够避免出现造成图像糊化严重的现象，大大提升了图像处理的画质。
本实施例中，原始图像的行分辨率是显示图像行分辨率的二倍。
进一步的，在将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和补偿分量的灰阶值的步骤中，根据原始图像像素的饱和度和三基色分量灰阶值的最小值确定补偿分量的灰阶值；根据原始图像像素的三基色分量灰阶值的最大值和补偿分量的灰阶值，计算补偿图像像素三基色分量的灰阶值。
本发明还提供一种像素渲染装置，其包括：
提取单元10，其设置为获取原始图像像素在RGBW1色彩空间的三基色分量RGB的灰阶值。
转换单元20，其设置为将原始图像像素RGBW1的三基色分量RGB的灰阶值转换为补偿图像像素的三基色分量(R’，G’，B’)和补偿分量W的灰阶值。
采样单元30，其设置为对补偿图像进行采样，补偿图像的每行像素中包括多组由两个相邻补偿图像像素组成的像素组，提取每组中前一个补偿图像像素的前两个基色(R’，G’)分量和后一个补偿图像像素的第三基色分量B’与所述补偿分量W的灰阶值。
复用单元40，其设置为将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的子像素的灰阶值。
进一步的，所述转换单元20还用于：根据原始图像像素的饱和度和三基 色分量灰阶值的最小值确定补偿分量的灰阶值；根据原始图像像素的三基色分量灰阶值的最大值和补偿分量的灰阶值，计算补偿图像像素三基色分量的灰阶值。
本发明还提供一种显示装置，其包括所述的像素渲染装置，显示面板，扫描驱动电路及数据驱动电路。所述显示面板设置有若干行屏幕像素，所述屏幕像素包括(R，G，B)子像素和补偿子像素W，在每行屏幕像素中所述(R，G，B)子像素和补偿子像素W2交替排布。所述扫描驱动电路，其设置为循环驱动每行屏幕像素。所述数据驱动电路，其设置从所述像素渲染装置接收每行屏幕像素中各个子像素的灰阶值，并提供至屏幕像素中相应子像素。将渲染之后的图像显示在显示面板上。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (10)

  1. 一种像素渲染方法，其中，包括：
    获取原始图像像素RGB的三基色分量RGB的灰阶值；
    将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和初始补偿分量的灰阶值；
    对补偿图像进行采样，补偿图像的每行像素中包括多组由两个相邻补偿图像像素组成的像素组，提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值；
    将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值。
  2. 如权利要求1所述的像素渲染方法，其中，所述补偿图像像素的补偿分量为白色分量。
  3. 如权利要求2所述的像素渲染方法，其中，原始图像的行分辨率是显示图像行分辨率的二倍。
  4. 如权利要求3所述的像素渲染方法，其中，在将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和补偿分量的灰阶值的步骤中，根据原始图像像素的饱和度和三基色分量灰阶值的最小值确定补偿分量的灰阶值；根据原始图像像素的三基色分量灰阶值的最大值和补偿分量的灰阶值，计算补偿图像像素三基色分量的灰阶值。
  5. 一种像素渲染装置，其中，包括：
    提取单元，其设置为获取原始图像像素在RGB色彩空间的三基色分量的灰阶值；
    转换单元，其设置为将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和补偿分量的灰阶值；
    采样单元，其设置为对补偿图像进行采样，对补偿图像进行采样，补偿图像的每行像素中包括多组由两个相邻补偿图像像素组成的像素组，提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分 量与所述补偿分量的灰阶值；
    复用单元，其设置为将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值。
  6. 如权利要求5所述的像素渲染装置，其中，所述转换单元还用于：根据原始图像像素的饱和度和三基色分量灰阶值的最小值确定补偿分量的灰阶值；根据原始图像像素的三基色分量灰阶值的最大值和补偿分量的灰阶值，计算补偿图像像素三基色分量的灰阶值。
  7. 如权利要求5所述的像素渲染装置，其中，所述补偿图像像素的补偿分量为白色分量。
  8. 一种显示装置，其中，包括：显示面板，其设置有若干行屏幕像素，所述屏幕像素包括三基色子像素和补偿子像素，在每行屏幕像素中所述三基色子像素和补偿子像素交替排布；
    扫描驱动电路，其设置为循环驱动每行屏幕像素；
    数据驱动电路，其设置从所述像素渲染装置接收每行屏幕像素中各个子像素的灰阶值，并提供至屏幕像素中相应子像素；
    还包括像素渲染装置，所述像素渲染装置包括提取单元，其设置为获取原始图像像素在RGB色彩空间的三基色分量的灰阶值；
    转换单元，其设置为将原始图像像素的三基色分量的灰阶值转换为补偿图像像素的三基色分量和补偿分量的灰阶值；
    采样单元，其设置为对补偿图像进行采样，对补偿图像进行采样，补偿图像的每行像素中包括多组由两个相邻补偿图像像素组成的像素组，提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值；
    复用单元，其设置为将所述提取每组中前一个补偿图像像素的前两个基色分量和后一个补偿图像像素的第三基色分量与所述补偿分量的灰阶值设定为每行屏幕像素中相应的每一子像素的灰阶值。
  9. 如权利要求8所述的显示装置，其中，所述转换单元还用于：根据原始图像像素的饱和度和三基色分量灰阶值的最小值确定补偿分量的灰阶值；根据 原始图像像素的三基色分量灰阶值的最大值和补偿分量的灰阶值，计算补偿图像像素三基色分量的灰阶值。
  10. 如权利要求8所述的显示装置，其中，所述补偿图像像素的补偿分量为白色分量。
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