Black Matrix Shielding Regions for LCD Support Columns
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Solution Overview
Problem
High-resolution liquid crystal displays (LCDs) face issues such as pressing failure and light leakage due to the small black matrix area around support columns, leading to misalignment and damage of alignment films, which affects display quality.
Innovation Solution
A black matrix design with widened shielding regions around support columns, ensuring the movable area of support columns is fully covered, reducing light leakage and maintaining transmittance by adjusting the intersection region dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the black matrix area around support columns is reduced to increase pixel density, then the resolution is improved, but the alignment film becomes vulnerable to damage and light leakage occurs
Solution Approach 1:
The patent applies local quality by creating a differentiated black matrix structure where the intersection regions have different properties than the standard black matrix areas. Specifically, the intersection regions are designed with larger area and different thickness to provide enhanced protection for support columns while maintaining the overall high-resolution pixel structure. This localized modification allows the alignment film to be protected at critical points without compromising the overall resolution.
Solution Approach 2:
The black matrix is segmented into distinct functional regions: standard black matrix areas for light blocking and enhanced intersection regions for support column protection. This segmentation allows each region to perform its specific function optimally - the standard areas maintain resolution by being minimal, while the intersection regions provide reliability by being enlarged and reinforced.
2Reliability
If the black matrix area is increased to protect support columns, then the alignment film stability is improved, but the light transmittance decreases
Solution Approach 1:
The patent uses local quality by concentrating the black matrix enhancement only at intersection regions where support columns are located, rather than uniformly increasing the black matrix area across the entire display. This localized approach provides necessary protection for the alignment film at critical points while minimizing the impact on overall light transmittance, as the majority of the black matrix area remains optimized for light blocking efficiency.
Solution Approach 2:
The patent applies partial action by selectively enlarging only the intersection regions of the black matrix that directly contact or near support columns, rather than uniformly increasing the entire black matrix. This partial enhancement provides sufficient protection for alignment film stability at the necessary locations without excessively reducing the overall light transmittance of the display.
3Reliability
If the intersection region of the black matrix is widened to cover the movable area of support columns, then the pressing failure is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by modifying only the intersection regions of the black matrix to be larger and different in thickness, while keeping the standard black matrix areas unchanged. This localized modification simplifies manufacturing compared to redesigning the entire black matrix structure, as only specific regions require enhanced dimensions and properties.
Solution Approach 2:
The patent incorporates the enlarged intersection regions directly into the black matrix formation process, performing the protection function in advance during manufacturing. By designing the intersection regions with larger area and different thickness from the outset, the structure is pre-configured to accommodate support column movement and prevent pressing failures without requiring additional manufacturing steps or post-processing adjustments.
Data Source
AI summary
A black matrix, a color filter and a method of preparing the same, a display panel, and a display device are provided, including: a plurality of first walls extending along a first direction; and a plurality of second walls extending along a second direction intersected with the plurality of first walls along the first direction at intersection regions, wherein the plurality of first walls and the plurality of second walls form a mesh-like structure with a plurality of openings. At least one of the intersection regions is to receive a main support column including a top end, and the at least one of the intersection regions to receive the main support column is widened to be larger than a dimension of the top end of the main support column to be received therein.