Color Filter Substrate Layout Using Blue Resist to Reduce Yellow Shift
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Solution Overview
Problem
Display devices experience a shift in white point due to light color changes caused by layer materials, affecting display quality.
Innovation Solution
A color filter substrate with a specific arrangement of color resists, including a third color resist covering first and second color resists, to adjust light b* values and alleviate yellow shift, while reducing areas of first and second resists to enhance brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the areas of the first color resist and second color resist are reduced, then brightness is improved and yellow shift is alleviated, but color filter coverage is reduced
Solution Approach 1:
The patent merges the first color resist and second color resist into a single third color resist that covers both regions. This consolidation maintains color filter coverage while reducing the total area of color resists, thereby improving brightness and alleviating yellow shift without sacrificing coverage.
Solution Approach 2:
The third color resist serves multiple functions simultaneously: it provides color filtering for both the first and second sub-pixel regions, maintains overall color filter coverage, and reduces the total resist area to improve brightness and reduce yellow shift. This multi-functionality resolves the contradiction between coverage and brightness.
2Manufacturing precision
If the third color resist covers the first and second color resists, then yellow shift is alleviated by adjusting b* value, but device structure becomes more complex
Solution Approach 1:
By merging the first and second color resists into a single third color resist that covers both regions, the patent simplifies the overall structure while achieving the desired color accuracy improvement. The third color resist is positioned to cover both sub-pixel regions, providing a unified solution that reduces structural complexity.
3Manufacturing precision
If color resists are used to adjust light color, then white point yellow shift is caused, but display quality is improved through color filtering
Solution Approach 1:
The patent applies local quality by positioning the third color resist specifically in the first sub-pixel region and second sub-pixel region to provide localized color filtering. This targeted approach allows precise control over color filtering performance in specific areas while minimizing the harmful yellow shift effect through optimized resist placement and area reduction.
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
The solution effectively reduces yellow shift and improves display quality by adjusting light b* values and increasing brightness.
Implementation Method 1
The third color resist is disposed on the substrate and in the first portion and the second portion of the first sub-pixel region, the first portion and the second portion of the second sub-pixel region, and the third sub-pixel region. The first color resist, the second color resist, and the third color resist have different colors, and the color of the third color resist is blue.
Data Source
AI summary
This invention discloses a color filter substrate and a display device. The color filter substrate includes a substrate, a first color resist, a second color resist, and a third color resist. The substrate has a pixel region which includes a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region, and each of the first sub-pixel region and the second sub-pixel region includes a first portion and a second portion. The first color resist is disposed in the first portion of the first sub-pixel region. The second color resist is disposed in the first portion of the second sub-pixel region. The third color resist is disposed in the first sub-pixel region, the second sub-pixel region, and the third sub-pixel region. The first color resist, the second color resist, and the third color resist have different colors, and the color of the third color resist is blue.