Method and device for image conversion from RGB signal to RGBW signal

Abstract

Provided are an image conversion method and apparatus from an RGB signal to an RGBW signal. The method comprises the following steps: converting each received RGB input signal into a corresponding RGB brightness input value (S101); determining RGBW brightness output values according to a relationship between a corresponding point of each RGB brightness input value in the chromatogram and a position of each RGBW divided area (S102); and converting each determined RGBW brightness output value into a corresponding RGBW output signal and outputting the signals (S103). By determining a corresponding point of each RGB brightness input value in the chromatogram, the RGB brightness input values are converted into RGBW brightness output values, which can ensure color distortionless during conversion from the RGB signal to the RBGW signal. Moreover, when the RGBW brightness output values are determined according to the corresponding point of each RGB brightness input value in the chromatogram, the RGBW brightness output values can be adjusted as required, so as to improve the brightness of the display device in whole and improve the image 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 (LCD) and organic electroluminescent display panels (OLED), 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 are red (R) sub-pixel units, green (G) sub-pixel units, blue (B) sub-pixels 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, signal transmission interfaces such as...

AI Technical Summary

Problems solved by technology

[0003] At present, the signal transmission interfaces such as VGA interface and DVI interface generally transmit RGB signals. If the RGB signals are directly applied to the RGBW display, the image will be distorted. Therefore, it is necessary to convert the RGB signals connected to the RGBW display.

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