Flexible Display Encapsulation Notches for Bending Stress
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Solution Overview
Problem
The edge of the encapsulation layer in flexible display panels tends to warp when bent, creating a path for water and oxygen intrusion and reducing the panel's reliability due to the hardness of inorganic film layers.
Innovation Solution
A flexible display panel design featuring an encapsulation layer with alternating inorganic and organic layers, where notches on the edge near the bending area are filled with a flexible material, and protrusions with gradually reducing thickness, dispersing bending stress and preventing warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the encapsulation layer uses inorganic film layers to prevent water and oxygen intrusion, then the protection effect is improved, but the edge of the encapsulation layer is prone to warping due to bending stress
Solution Approach 1:
The edge of the encapsulation layer is divided into multiple segments by forming notches, which分散 the bending stress that would otherwise concentrate at the continuous edge. This segmentation allows the rigid inorganic film to better withstand bending without warping.
Solution Approach 2:
The encapsulation layer has different structures at different locations: the display area has a complete encapsulation for protection, while the bending area edge has notches to reduce stress. This local differentiation allows the structure to optimize both protection and flexibility.
2Reliability
If the encapsulation layer completely covers the display area and exceeds the boundary for better protection, then the protection function is improved, but the bending stress at the edge near the bending area increases
Solution Approach 1:
The encapsulation layer edge is segmented with notches to reduce stress concentration while maintaining complete coverage of the display area. The notches create a stepped structure that reduces bending stress without compromising the protective coverage.
Solution Approach 2:
The encapsulation layer maintains full coverage over the display area for protection, but the edge structure is locally modified with notches in the bending area to reduce stress. This creates different structural qualities in different regions to balance protection and stress reduction.
Data Source
AI summary
The disclosure provides a flexible display panel and a flexible display, by disposing a plurality of notches at intervals on an edge of the encapsulation layer of the flexible display panel near the bending area of the flexible display panel, so that when the flexible display panel is bent in the bending area, the bending stress applied to the edge of the encapsulation layer can be dispersed through the notches, so as to avoid the problem that warping of the edge of the encapsulation layer may be caused by the bending stress, thereby increasing the reliability of the flexible display panel.