Display Panel Shading Strip Segmentation for Alignment Film Coverage
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Solution Overview
Problem
In display technologies, the thickness of the black matrix (BM) creates a concave structure that restricts the flow of the alignment film, leading to areas within the primary frame body not being covered during spraying, especially when the primary frame body size is small and the nozzle array gap is larger, resulting in incomplete alignment.
Innovation Solution
The display panel incorporates a BM layer with first, second, and third shading strips, where the third shading strip is positioned between primary and sub-pixel regions, forming sub-frame bodies and channels that allow communication between them, ensuring the alignment film covers all areas by flowing from one sub-frame body to another during spraying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the BM layer is made thick to improve shading performance, then the contrast is improved, but the terrain formed causes restrictions on flow of the alignment film leading to incomplete coverage
Solution Approach 1:
The patent divides the primary frame body into multiple sub-frame bodies by introducing partitioned structures (third shading strips) within the BM layer. This segmentation creates multiple smaller enclosed spaces that are easier to fill with alignment film, preventing the film from being blocked by the thick BM terrain while maintaining the overall shading performance of the thick BM layer.
2Productivity
If the primary frame body size is reduced to improve pixel density, then the productivity is improved, but the gap of the nozzle array becomes relatively larger causing some regions to be not sprayed with alignment film material
Solution Approach 1:
By partitioning the primary frame body into multiple sub-frame bodies, the patent creates multiple smaller enclosed spaces. Each sub-frame body can be independently and completely covered by the alignment film spraying process, ensuring that even when the overall frame body is small, all regions receive proper alignment film coverage.
Solution Approach 2:
The patent introduces channels or openings in the third shading strip before the alignment film spraying process. These pre-formed channels serve as pathways that guide the alignment film material into all sub-frame bodies, ensuring complete coverage before the actual spraying occurs.
3Illumination intensity
If the BM layer is made thick to improve shading performance, then the contrast is improved, but the flow of the alignment film is restricted causing incomplete alignment in some regions
Solution Approach 1:
The patent segments the thick BM layer into multiple sub-frame bodies with partitioned structures. This segmentation reduces the distance the alignment film must travel across the BM terrain, making it easier for the film to flow and cover all regions completely while preserving the thick BM layer's superior shading and contrast performance.
Solution Approach 2:
The patent introduces channels or openings as intermediary pathways through the third shading strip. These channels act as mediators that facilitate the flow of alignment film material across the BM layer terrain, allowing the film to reach all sub-frame bodies without being blocked by the thick BM structures.
Data Source
AI summary
Embodiments of this application disclose a display panel. A primary pixel electrode is disposed inside a primary pixel region, and a sub-pixel electrode is disposed inside a sub-pixel region. First shading strips and second shading strips are intersected to form a plurality of primary frame bodies. One primary frame body correspondingly encloses a circumferential side of one pixel region. A third shading strip is disposed inside the primary frame body and correspondingly disposed between the primary pixel region and the sub-pixel region. The third shading strip and the primary frame body define two sub-frame bodies, and a channel for making the two sub-frame bodies communicate is disposed on the third shading strip.