Pixel Signal Conversion for WRGB Display Color Cast Reduction
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Solution Overview
Problem
High-resolution liquid crystal displays with four-color subpixels face issues of light leakage and color cast at large viewing angles due to differing optical properties at front and large view angles, affecting picture quality.
Innovation Solution
A pixel signal conversion method that processes initial subpixel signals for R, G, and B to derive converted signals by calculating differences with a minimum stimulus value, and uses these to drive subpixels in a hybrid-color display with W, R, G, and B, improving color representation and reducing color cast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a white subpixel is added to improve penetration rate and optical efficiency, then optical efficiency is improved, but color cast occurs at large viewing angles
Solution Approach 1:
The patent applies parameter changes by converting the driving signals of the R, G, and B subpixels through mathematical operations (calculating minimum values and differences) to generate converted signals that compensate for optical property variations at different viewing angles, thereby reducing color cast while maintaining the optical efficiency benefits of the white subpixel
Solution Approach 2:
The patent implements feedback by using the converted subpixel signals to drive the R, G, and B subpixels in a way that compensates for the optical discrepancies introduced by the white subpixel, creating a closed-loop correction system that maintains color accuracy across viewing angles
2Measurement precision
If resolution is increased to improve display quality, then display quality is improved, but penetration rate decreases
Solution Approach 1:
The patent introduces asymmetry by adding a white subpixel to the symmetric R-G-B structure, creating a four-color subpixel arrangement that asymmetrically addresses the penetration rate issue while maintaining overall display quality through signal conversion
Data Source
AI summary
A pixel signal conversion method and device, and a computer device, said method comprising: according to a first initial sub-pixel signal, a second initial sub-pixel signal and a third initial sub-pixel signal in the pixel signals, obtaining first stimulus value signals, second stimulus value signals and third stimulus value signals correspondingly. When the converted pixel signals are applied to a mixed color display composed of four sub-pixels of W, R, G, and B, the display effect is closer to the actual performance of the original R, G, and B mixed color, and the color cast defect of the large viewing angle is reduced.