Reflective Display Color Compensation Layer for Strip Pattern Reduction
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Solution Overview
Problem
Reflective displays face issues with strip patterns caused by reflectance deviations between color resists and regularity in color resist arrangements, which affect color performance and white balance, especially when the pixel fill factor of the color resist is reduced.
Innovation Solution
Incorporating a color compensation layer with a first blue ink layer that overlaps specific sub-pixel regions, reducing the overall reflectance of those regions and maintaining the area balance of blue, green, and red color resists to avoid strip patterns and maintain white balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the pixel fill factor of color resist is reduced, then the strip patterns caused by reflectance deviation can be minimized, but the color performance and white balance of the reflective display are affected
Solution Approach 1:
The patent applies local quality by introducing a color compensation layer with specific ink layers (blue, green, red) positioned at different locations to locally adjust the reflectance characteristics. The first blue ink layer is positioned to overlap with the green color resist region, while the second blue ink layer overlaps with the blue color resist region, creating localized compensation effects that address strip patterns without compromising overall color performance
Solution Approach 2:
The patent employs asymmetry by using different ink layer configurations for different color resist regions. The color compensation layer contains selectively positioned ink layers that create asymmetric reflectance compensation - the first blue ink layer compensates the green region while the second blue ink layer compensates the blue region, allowing asymmetric correction of reflectance deviations across different sub-pixel regions
2Object-affected harmful factors
If the area of blue color resist is reduced to avoid strip patterns, then reflectance deviation is minimized, but the white balance and color performance degradation occurs
Solution Approach 1:
The patent applies parameter changes by modifying the optical parameters (reflectance characteristics) of different regions through the color compensation layer. By introducing ink layers with specific optical properties at strategic positions, the patent changes the effective reflectance parameters of the green and blue color resist regions, thereby compensating for reflectance deviations and maintaining white balance without requiring changes to the base color resist areas
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces reflectance deviations and maintains color performance and white balance by using a portion of the blue color resist as the first blue ink layer, minimizing the area of the blue color resist and enhancing contrast while avoiding color performance degradation.
Implementation Method 1
The color filter array includes a red color resist, a green color resist, and a blue color resist
Implementation Method 2
forms colorful figures by printing color filter layer to filter a light reflected by a display medium layer
Data Source
AI summary
A reflective display with a color compensation layer includes a driving substrate, a display medium layer located on the driving substrate, a color filter array, an adhesive layer located on the display medium layer, and a color compensation layer. The driving substrate includes a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region. The color filter array includes a red color resist, a green color resist, and a blue color resist. The color filter array and the color compensation layer are located at opposite two sides of the adhesive layer. The color compensation layer includes a first blue ink layer. A vertical projection of the green color resist on the driving substrate overlaps the second sub-pixel region. A vertical projection of the first blue ink layer on the driving substrate at least partially overlaps the second sub-pixel region.