LCD Panel Spacer Dams to Prevent Alignment Layer Scratching
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Solution Overview
Problem
Existing liquid crystal display panels face issues with spacers sliding and scratching the alignment layer, leading to display problems like light leakage and red and blue spots when subjected to mechanical stress.
Innovation Solution
The implementation of dams around the ends of spacers on the array substrate, which are composed of buffer blocks and inorganic insulation layers, prevents spacer sliding and protects the alignment layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spacers are provided on the opposite substrate to maintain gap thickness, then the liquid crystal layer is protected from squeezing and deformation, but the spacers slide when the display panel is squeezed or dropped, causing the alignment layer to be scratched
Solution Approach 1:
The patent introduces dams as an intermediary structure between the spacers and the alignment layer. These dams are formed on the array substrate and extend to partially surround the spacers, acting as a mediator that prevents direct contact between the sliding spacers and the alignment layer, thereby eliminating the harmful scratching effect while maintaining the gap-maintaining function of the spacers.
Solution Approach 2:
The dams are formed in advance during the manufacturing process, before the spacers are assembled into their final positions. This preliminary action ensures that the protective barriers are already in place to prevent alignment layer scratching from the outset, rather than attempting to repair damage after it occurs.
2Object-affected harmful factors
If dams are formed to prevent spacer sliding, then alignment layer scratching is prevented, but the device structure becomes more complex
Solution Approach 1:
The dams are merged with the array substrate structure, being formed as an integral part of the substrate during the same manufacturing process. This combining approach eliminates the need for separate spacer protection components, reducing overall device complexity while still providing the necessary protection against alignment layer scratching.
Solution Approach 2:
The dams serve multiple functions: they act as protective barriers against alignment layer scratching, provide structural support during assembly, and help define the precise positioning of spacers. This multi-functionality reduces the need for additional dedicated components, thereby simplifying the overall device structure.
Data Source
AI summary
A display panel and a display device are provided. the display panel includes an array substrate and an opposite substrate arranged opposite to each other. A plurality of spacers are provided on a side of the opposite substrate adjacent to the array substrate, and a plurality of dams are provided on a side of the array substrate adjacent to the opposite substrate to prevent ends of the spacers adjacent to the array substrate from sliding, thereby preventing the spacers from scratching an alignment layer on a surface of the array substrate.