Display Panel Mesh Blocking Portion Crack Arrest
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Solution Overview
Problem
Flexible display panels face issues with encapsulation layer cracking during the cutting process, which can lead to reduced encapsulation effectiveness and potential damage to the functional section.
Innovation Solution
A display panel design featuring a substrate with a blocking portion on the cutting section, where the encapsulation layer is formed on the blocking portion with a rugged contact surface, preventing cracks from extending to the functional section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the encapsulation layer is extended to the cutting section to enhance encapsulation coverage, then the encapsulation effect is improved, but the encapsulation layer becomes prone to cracking during the cutting process
Solution Approach 1:
The blocking portion is divided into a plurality of mesh structures, creating multiple small segments instead of a continuous structure. This segmentation allows the encapsulation layer to be divided into smaller sections by the mesh gaps, preventing cracks from propagating across the entire cutting section while maintaining encapsulation coverage.
Solution Approach 2:
The blocking portion with mesh structure serves as an intermediary layer between the substrate and the encapsulation layer. It provides mechanical support and stress distribution at the cutting section, acting as a buffer that prevents direct stress concentration on the encapsulation layer during cutting operations.
2Ease of manufacture
If the encapsulation layer is formed directly on the flat substrate surface, then the manufacturing process is simple, but cracks can easily spread from the cutting edge to the functional section
Solution Approach 1:
The blocking portion is selectively formed only at the cutting section where crack initiation is most likely, rather than across the entire substrate. The mesh structure provides localized crack arrest functionality at the critical cutting area while maintaining a simple flat substrate surface elsewhere, balancing manufacturing simplicity with crack resistance.
3Ease of manufacture
If a flat contact surface is used between the encapsulation layer and substrate, then the encapsulation layer formation is straightforward, but crack extension is facilitated
Solution Approach 1:
The mesh structure of the blocking portion creates natural segmentation points that divide the encapsulation layer into smaller sections. This segmentation interrupts potential crack paths, preventing cracks from extending continuously from the cutting edge to the functional section while maintaining relatively simple encapsulation layer formation processes.
Data Source
AI summary
A display panel is provided and includes at least one cutting section and a functional section. A cross-sectional structure of the display panel includes a substrate, a blocking portion, and an encapsulating layer. The substrate includes a first sub-portion corresponding to a position of the cutting section. The blocking portion is disposed on the first sub-portion. The encapsulating layer is disposed on the blocking portion. A contact surface between the encapsulating layer and the blocking portion is a rugged surface.