Color Filter Array Layout for Electrophoretic Display Color Mixing
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Solution Overview
Problem
Existing color electrophoretic displays face issues with color mixing due to high or low pixel fill factors of color resists, affecting color performance.
Innovation Solution
Implementing a color filter array with color resists having varying pixel fill factors, specifically less than 60%, and arranging them such that those with smaller fill factors are positioned between those with larger fill factors to avoid color mixing and maintain color performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the pixel fill factor of the color resists is increased to improve color performance, then the color saturation is improved, but color mixing problem occurs between adjacent color resists
Solution Approach 1:
The patent applies local quality by differentiating the pixel fill factors of different color resists. Specifically, the first color resist has a first pixel fill factor while the second color resist has a second pixel fill factor that is smaller than the first. This local differentiation prevents color mixing at boundaries while maintaining adequate color performance in each sub-pixel region.
Solution Approach 2:
The patent employs asymmetry by intentionally creating unequal pixel fill factors between adjacent color resists. The first color resist and second color resist have deliberately different fill factors, breaking the symmetry that would otherwise cause uniform color mixing problems across all color boundaries.
2Object-generated harmful factors
If the pixel fill factor of the color resists is decreased to prevent color mixing, then color mixing is reduced, but the color performance of the display is affected
Solution Approach 1:
The patent applies local quality by differentiating the pixel fill factors of different color resists. Specifically, the first color resist has a first pixel fill factor while the second color resist has a second pixel fill factor that is smaller than the first. This local differentiation prevents color mixing at boundaries while maintaining adequate color performance in each sub-pixel region.
3Ease of manufacture
If a uniform pixel fill factor is used for all color resists to simplify manufacturing, then manufacturing complexity is reduced, but color mixing or poor color performance occurs
Solution Approach 1:
The patent applies local quality by differentiating the pixel fill factors of different color resists. Specifically, the first color resist has a first pixel fill factor while the second color resist has a second pixel fill factor that is smaller than the first. This local differentiation prevents color mixing at boundaries while maintaining adequate color performance in each sub-pixel region.
Data Source
AI summary
The color electrophoretic display includes a display region, a pixel array, a display medium layer, and a color filter array. The display region includes multiple sub-pixel regions. The pixel array corresponds to the display region in position. The display medium layer is located on the pixel array. The color filter array is located on the display medium layer. The color filter array includes multiple color resists. A portion of the color resists include a first pixel fill factor, another portion of the color resists include a second pixel fill factor, the second pixel fill factor is smaller than the first pixel fill factor, and the first pixel fill factor and the second pixel fill factor are smaller than 60%.