Light-Shielding Layer Enlarged Portions for Display Leakage
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Solution Overview
Problem
Liquid-crystal display devices face issues with light leakage and mura (multi-domain random alignment) problems, which affect the aperture ratio and view angle, leading to suboptimal display quality.
Innovation Solution
A display device with a light-shielding layer featuring a matrix portion and an enlarged portion, where the enlarged portion is strategically placed at the intersection of adjacent sub-pixels, effectively reducing light leakage and improving contrast by shielding the regions prone to light leakage and mura issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional liquid-crystal display device structure is used, then the device can be manufactured with standard processes, but light leakage and mura issues occur that deteriorate display quality
Solution Approach 1:
The light-shielding layer is designed with different structures in different regions: a matrix portion for general light shielding and an enlarged portion specifically at the intersection of adjacent sub-pixels. This local enhancement targets the specific area where light leakage and mura issues occur most severely, improving display quality without unnecessarily reducing the overall aperture ratio.
Solution Approach 2:
The light-shielding layer is segmented into two distinct portions: the matrix portion that defines the sub-pixels and the enlarged portion at the intersections. This segmentation allows independent optimization of each region's function, with the enlarged portion specifically addressing light leakage at pixel boundaries while the matrix portion maintains overall pixel structure.
2Object-affected harmful factors
If the light-shielding layer is enlarged to reduce light leakage, then light leakage and mura issues are reduced, but the aperture ratio decreases
Solution Approach 1:
Instead of uniformly enlarging the light-shielding layer across the entire display, the invention applies the enlarged portion only at the critical intersection regions of adjacent sub-pixels. This localized approach minimizes the total area occupied by light-shielding structures, thereby reducing the impact on aperture ratio while still effectively addressing light leakage at the most problematic areas.
Solution Approach 2:
The invention applies partial action by enlarging the light-shielding layer only where absolutely necessary (at the intersections of adjacent sub-pixels) rather than uniformly across all regions. The ratio of the enlarged portion area to the total sub-pixel area is controlled at about 1.5% to 6%, providing just enough shielding to eliminate light leakage without excessive area consumption that would significantly reduce aperture ratio.
3Reliability
If the light-shielding layer is enlarged to reduce light leakage, then display contrast is improved, but the device structure becomes more complex
Solution Approach 1:
The invention merges the light-shielding function with the existing pixel structure by integrating the enlarged portion into the intersection regions where sub-pixels meet. This combination allows the light-shielding layer to serve dual purposes: defining pixel boundaries through the matrix portion and preventing light leakage at intersections through the enlarged portion, without requiring completely separate structural elements.
Data Source
AI summary
A display device is provided. The display device includes a pixel-displaying region, including: at least two pixels including a plurality of sub-pixels; and a light-shielding layer including a matrix portion and an enlarged portion, wherein the enlarged portion is disposed at an intersection of two of the adjacent sub-pixels and is adjacent to the matrix portion; wherein the matrix portion defines the sub-pixels, and a total area of the sub-pixels is defined as a first area and a ratio of an area of the enlarged portion to the first area is about 1.5% to 6%.