Display Panel Light Shielding Layer Segmentation for Cutting Yield
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Solution Overview
Problem
Existing display panel manufacturing processes lead to liquid crystal leakage during cutting due to weak adhesion of black photoresist to the substrate, resulting in reduced yield.
Innovation Solution
A display panel design with patterned light shielding layers in the protection and cutting areas, discontinuously disposed with the color film layer, preventing the transmission of cutting force and maintaining the sealing property of the liquid crystal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a continuous light shielding layer is used in the cutting area, then light shielding effectiveness is improved, but cutting force transmission causes separation of the light shielding layer from the substrate
Solution Approach 1:
The light shielding layer is divided into multiple discrete light shielding regions instead of a continuous layer. Each light shielding region corresponds to a pixel or sub-pixel area and is separated from adjacent light shielding regions by gaps. This segmentation prevents the continuous transmission of cutting forces across the entire light shielding layer, eliminating the separation problem while maintaining light shielding effectiveness in each discrete region.
2Reliability
If the light shielding layer is made discontinuous, then cutting force transmission is reduced, but light shielding coverage is decreased
Solution Approach 1:
The light shielding structure implements local quality by providing full light shielding coverage in the display area through discrete light shielding regions, while in the cutting area, the light shielding is provided only at the edges of the display area. The discontinuous light shielding regions in the cutting area are positioned to prevent light leakage from adjacent panels while allowing cutting forces to be isolated. This local differentiation optimizes both light shielding performance and resistance to cutting separation.
Data Source
AI summary
The present disclosure provides a display panel and a display module, including a display area, a protection area surrounding the display area, a cutting area located at the periphery of the protection area; a first substrate and a second substrate disposed in the display area; a first light shielding layer patterned and disposed in the protection area and a second light shielding layer patterned and disposed in the cutting area, and at least one of the first light shielding layer, the second light shielding layer, and a color film layer of the first substrate or the second substrate are in a same layer.