Image conversion method and device for rgb signal to rgbw signal
An image conversion and signal technology, applied in the direction of cathode ray tube indicators, instruments, static indicators, etc., can solve the problems of color distortion, color gamut shift, etc.
Active Publication Date: 2016-03-02
BOE TECH GRP CO LTD
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[0004] In view of this, an embodiment of the present invention provides an image conversion method and device from an RGB signal to an RGBW signal to solve the problem of color gamut shift and color distortion caused by the drift of the four colors R, G, B, and W. question
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[0195] The specific implementation manners of the image conversion method and device from RGB signals to RGBW signals provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0196] An image conversion method from an RGB signal to an RGBW signal provided in an embodiment of the present invention, such as figure 1 As shown, it specifically includes the following steps:
[0197] S101. Convert the received RGB input signals into corresponding RGB brightness input values;
[0198] S102, converting the RGB brightness input value into an RGBW brightness output value;
[0199] S103. According to the positional relationship between the RGBW color coordinate values respectively corresponding to the RGBW brightness output values in the chromaticity spectrum and the predetermined actual color coordinate values of the RGBW monochrome color shift, respectively determine the RGBW brightness output values a...
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The invention discloses an image conversion method and device for RGB signals to RGBW signals. After converting RGB brightness input values into RGBW brightness output values; according to the RGBW color coordinate values corresponding to the RGBW brightness output values in the chromaticity spectrum and the preset The determined positional relationship of the actual color coordinate values of the RGBW where the monochromatic color shift occurs is determined, and the RGBW brightness output value after the color shift is eliminated is determined, and then converted into an output signal for output. Through the above method provided by the present invention, the colors that have experienced monochromatic drift in RGBW can be compensated back to the expected RGBW color coordinates and brightness values. Therefore, the color gamut shift and color distortion caused by the RGBW monochromatic color shift can be eliminated. problem to make the color gamut of the display screen more accurate. At the same time, in the process of eliminating color cast, the value of the RGBW brightness output value can be adjusted as needed to improve the overall brightness of the display device and thus improve the picture contrast.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an image conversion method and device from RGB signals to RGBW signals. Background technique [0002] Currently, in image display devices such as liquid crystal panels (LCDs) and organic electroluminescent display panels (OLEDs), red (R) sub-pixel units, green (G) sub-pixel units, and blue (B) sub-pixel The units form a pixel unit, and the color image is displayed by controlling the gray value of each sub-pixel unit to mix the required display color. Due to the low luminous efficiency of RGB three primary colors, it will restrict the product optimization of display devices composed of RGB three primary colors. Based on this, there have been red (R) sub-pixel units, green (G) sub-pixel units, blue (B) A pixel unit composed of a unit and a white (W) sub-pixel unit to improve the luminous efficiency of an RGB display. [0003] At present, during the conversion process from RGB si...
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IPC IPC(8): G09G5/02G09G5/10
CPCG09G5/02G09G2300/0452G09G2320/0666G09G3/2003G09G2340/06
Inventor 张晨杨飞
Owner BOE TECH GRP CO LTD