Self-adaptive RGB to RGBW Image Conversion Method
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Solution Overview
Problem
RGBW display panels suffer from reduced display color gamut and deviated color saturation compared to RGB panels, affecting image quality due to improved luminance and energy efficiency.
Innovation Solution
A self-adaptive image conversion method that extracts original grey values, applies inverse gamma correction, calculates color saturation, and adjusts gain values to enhance luminance, ensuring improved color accuracy and display quality by converting RGB images to RGBW images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If RGBW panels use W sub-pixels to improve luminance and lower energy consumption, then luminance and energy efficiency are improved, but display color gamut is reduced and color saturation is deviated
Solution Approach 1:
The patent applies different gain values to different color components (R, G, B, W) based on their individual characteristics and the desired output color. Each color component is adjusted locally through specific gain factors rather than uniform adjustment, allowing luminance enhancement while maintaining color accuracy.
Solution Approach 2:
The conversion process dynamically adjusts the grey values of R, G, B, and W sub-pixels based on the input RGB values and calculated gain values. The gain values are determined through gamma correction and color space transformation, enabling adaptive luminance enhancement while preserving color saturation across different image content.
2Illumination intensity
If RGBW panels use W sub-pixels to improve luminance, then luminance is improved, but display color gamut is reduced
Solution Approach 1:
The patent transforms the color space from RGB to RGBW by changing the parameters (grey values) of the four color components. Through gamma correction and calculating appropriate gain values, the conversion adjusts the intensity parameters of each sub-pixel type to expand luminance while maintaining color gamut coverage.
3Ease of operation
If current technology treats minimum RGB value as W value for conversion, then conversion simplicity is maintained, but color saturation deviation occurs and display quality is affected
Solution Approach 1:
The patent introduces intermediate calculation steps including gamma correction and gain value computation as mediators between the simple minimum-value approach and the final RGBW output. These intermediary processes ensure accurate color transformation while maintaining systematic and implementable conversion procedures.
Data Source
AI summary
A method of self-adaptive conversion for images includes: calculating the degree of color saturation of each pixel of an RGB image and original grey value of each primary color component, and calculating a global gain value; calculating a total gain value of each pixel based on the global gain value and the partial gain value of each pixel; enhancing luminance of the white color component of each primary color component of each pixel based on the total gain value of each pixel, so to output an RGBW image. The present invention improves deviated color saturation to ensure display quality while elevating the display luminance when a conversion from an RGB image into an RGBW image.