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Subpixel rendering method and device for image conversion from RGB to RGBW

A sub-pixel rendering and image conversion technology, applied in the field of display devices, can solve the problems of abnormal color dots and aliasing in images, low accuracy of sub-pixel rendering results, etc., to achieve high accuracy, increase correlation, and reduce the degree of mutation.

Active Publication Date: 2019-03-12
HISENSE VISUAL TECH CO LTD
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Problems solved by technology

[0006] The present invention provides a sub-pixel rendering method and device for RGB to RGBW image conversion, in order to solve the existing RGB to RGBW image conversion, the accuracy of the sub-pixel rendering result is low, using the rendering result, still will Issues that make the final displayed image appear unusually colored dots and jagged

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  • Subpixel rendering method and device for image conversion from RGB to RGBW
  • Subpixel rendering method and device for image conversion from RGB to RGBW
  • Subpixel rendering method and device for image conversion from RGB to RGBW

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Embodiment Construction

[0021]It can be known from the background art that in the prior art, in the process of RGB to RGBW image conversion, by rendering each pixel in the sub-pixel in the RGBW color gamut, the sub-pixel in the RGBW color gamut of each pixel is reduced. After sampling, the degree of abrupt change in color between adjacent pixels. However, in practical applications, it is found that the accuracy of sub-pixel rendering in this method is low, resulting in abnormal color points and aliasing in the final image displayed on the RGBW LCD panel after downsampling. In order to solve this problem, the present invention provides a sub-pixel rendering method and device for RGB to RGBW image conversion.

[0022] The sub-pixel rendering method and device for RGB to RGBW image conversion provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0023] see figure 1 , figure 1 Shown is a schematic flowchart of a sub-pixel rendering method fo...

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Abstract

The invention discloses a subpixel rendering method and device for image conversion from RGB to RGBW. The subpixel rendering method comprises the following steps of generating a color value of each subpixel of each pixel in an RGBW color gamut according to R, G and B values of the pixel in an input image; determining the most similar subpixel value of each subpixel; rendering each subpixel according to the color value of the subpixel, the color value of the most similar subpixel value of the subpixel and the color value of a previous subpixel of the subpixel in order to generate a post-rendering color value of the subpixel. The post-rendering color value of each subpixel generated by the method gives consideration to the color value of the previous subpixel and the color value of the mostsimilar subpixel values in the neighbor gamut of the subpixel, the correlation of the color of each subpixel is increased, the abrupt change degree of the color is reduced, the precision of a rendering result is higher, the post-rendering color values are used for carrying out subsequent down-sampling processing, and the problems of abnormal color points and serrations cannot occur in a finally displayed image.

Description

technical field [0001] The present invention relates to the technical field of display devices, and in particular, to a sub-pixel rendering method and device for RGB to RGBW image conversion. Background technique [0002] In the image display of the RGB type liquid crystal panel, each pixel in the image is composed of red sub-pixels, green sub-pixels and blue sub-pixels, wherein the red sub-pixels, green sub-pixels and blue sub-pixels are respectively driven by a white backlight through a red sub-pixel. Filter film, green filter film and blue filter film. In this way, since only one-third of the white light passes through each sub-pixel unit of the RGB-type liquid crystal panel, and two-thirds of the white light is lost, it is necessary to provide greater power to ensure the RGB-type liquid crystal panel. enough brightness. [0003] In order to reduce power consumption while meeting the sufficient brightness of the RGB type liquid crystal panel, RGBW type liquid crystal pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20
CPCG09G3/2003
Inventor 刘丽丽田广
Owner HISENSE VISUAL TECH CO LTD
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