Multi-Color Sub-Pixel Arrangement for False Color Suppression
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Solution Overview
Problem
Multi-primary color image display devices with additional sub-pixels beyond the traditional RGB often generate false colors or artifacts, especially when displaying high-frequency signals.
Innovation Solution
An image display device with a pixel arrangement where m sub-pixels (m ≥ 4) include all colors in both vertical and horizontal directions, allowing for the suppression of false colors and artifacts by optimizing sub-pixel placement and using an image processing unit for sub-pixel rendering, which includes high-pass and low-pass filters to maintain resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of sub-pixel colors is increased beyond RGB to expand color reproduction range, then color reproduction capability is improved, but false colors and artifacts are generated when displaying high frequency signals
Solution Approach 1:
The patent divides the pixel into multiple sub-pixels with specific color assignments (R1, G1, B1, R2, G2, B2) and uses selective rendering for different frequency components. High frequency signals are rendered only on primary color sub-pixels (R1, G1, B1) while low frequency signals use all sub-pixels, segmenting the rendering process to prevent false color generation while maintaining color reproduction capability
Solution Approach 2:
The patent applies different rendering strategies to different spatial frequencies locally. High frequency components are handled differently from low frequency components, with high frequency rendering restricted to specific sub-pixels to avoid artifacts, while low frequency rendering utilizes all sub-pixels for full color reproduction
Data Source
AI summary
There is provided an image display device, in which a pixel includes sub-pixels of four or more colors that include a color in addition to the three primary colors, and which can display a high-quality image in which false colors or artifacts are suppressed. The image display device includes a pixel area in which a plurality of pixels P are arranged in a matrix shape, and each of the pixels P includes m (m is an integer which is equal to or greater than 4) sub-pixels SP. When it is assumed that the colors of the m sub-pixels SP included in one pixel are C1, C2, . . . , and Cm, the m sub-pixels SP which are sequentially arrayed from an arbitrary position include all of the colors of C1, C2, . . . , and Cm in both the vertical direction and the horizontal direction in the pixel area.