Color Filter Substrate Light Hole Filling Patterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transflective liquid crystal displays suffer from color deviation when used outdoors due to poor optical reflection efficiency, which is exacerbated by the need for different-sized light through holes in red, green, and blue color filters, increasing manufacturing costs and complexity.
Innovation Solution
A method for manufacturing a color filter substrate using a single mask plate for all colors with light through holes of the same size, combined with light hole filling patterns on a black matrix layer to regulate the effective light through hole ratios, ensuring no color deviation while reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If different sized light through holes are provided in red, green, blue color filters to prevent color deviation, then color accuracy is improved, but manufacturing complexity and cost increase due to requiring three different mask plates
Solution Approach 1:
The patent combines the functions of multiple mask plates into a single integrated mask plate that contains both the light through hole patterns and light hole filling patterns. This single mask plate simultaneously defines the light through holes for all sub-pixels and the filling patterns for specific colors, eliminating the need for separate mask plates for red, green, and blue color filters while maintaining precise color control through the filling patterns that create different effective light through hole ratios.
2Illumination intensity
If light through holes are provided in all color filters to improve optical reflection efficiency, then outdoor readability is improved, but color deviation occurs due to equal light transmission through all color filters
Solution Approach 1:
The patent applies local quality by providing light hole filling patterns specifically for certain sub-pixels of specific colors (e.g., red sub-pixels) while leaving other sub-pixels without filling patterns. This creates localized differences in effective light through hole ratios for different color channels, allowing each color to have optimized light transmission characteristics. The filling patterns are strategically placed to adjust the effective area of light through holes for specific color filters, thereby preventing color deviation while maintaining high optical reflection efficiency.
3Ease of manufacture
If a single mask plate with same sized light through holes is used for all color filters, then manufacturing cost is reduced, but color deviation occurs due to equal light transmission ratios
Solution Approach 1:
The patent segments the single mask plate into multiple functional regions: light through hole patterns that define the basic aperture structure for all sub-pixels, and light hole filling patterns that selectively fill specific regions for certain color filters. This segmentation allows the mask plate to simultaneously provide uniform light through holes for cost-effective manufacturing while creating differentiated effective light transmission areas for different colors through the filling patterns, thereby preventing color deviation.
Data Source
AI summary
A method for manufacturing a color filter substrate, comprising: preparing a mask plate for black matrix, and providing light hole filling patterns (16), correspondingly for sub-pixels of specific colors, on the mask plate for black matrix; preparing a mask plate (18) for color filter, and providing light through holes (17) of the same size, for sub-pixels of different colors, on the prepared mask plate for color filter, a position of a light through hole (17) corresponding to a position of a light hole filling pattern (16); manufacturing a color filter substrate by using the mask plate for black matrix and the mask plate for color filter.