Flexible Display Corner Structure for Crack-Resistant Bending
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display products face stress issues at corner positions, leading to cracks and encapsulating failures, which affect product quality and reliability, especially when bent or subjected to external forces.
Innovation Solution
A flexible display device design with a polarizer and optical adhesive layer extending beyond the display substrate's contour at corner areas, combined with anti-crack structures like anti-crack blocks and retaining walls, to mitigate stress and prevent crack propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display device is bent or subjected to external force, then the display can achieve flexible shaping, but stress concentrates at corner positions causing cracks and encapsulating failure
Solution Approach 1:
The patent applies local quality by providing anti-crack structures (anti-crack blocks and anti-crack retaining walls) specifically at corner positions where stress concentrates during bending. These localized reinforcements have different properties from the rest of the display substrate, addressing the specific vulnerability at corners while maintaining overall flexibility.
Solution Approach 2:
The patent implements beforehand cushioning by pre-installing anti-crack blocks and anti-crack retaining walls at corner positions before the display device is bent or subjected to external forces. These structures are positioned in advance to prevent crack initiation and propagation, cushioning against the anticipated stress during flexing operations.
2Device complexity
If the polarizer and optical adhesive layer are confined within the display substrate contour, then the structure is compact, but corner areas are vulnerable to cracking under stress
Solution Approach 1:
The patent extends the polarizer and optical adhesive layer beyond the display substrate contour in the lateral dimension, creating an overlapping region at the corners. This dimensional extension allows the polarizer and adhesive layer to bridge across the corner areas, providing additional structural support and crack resistance without significantly increasing overall device complexity.
Data Source
AI summary
A flexible display device and an electronic device are provided. The flexible display device includes a display substrate, a polarizer and a first optical adhesive layer that are sequentially stacked, and is provided with a display area and a first corner area. In the first corner area, an outer contour of the polarizer and/or an outer contour of the first optical adhesive layer extend(s) beyond an outer contour of the display substrate. The display substrate includes an anti-crack base, an anti-crack retaining wall, and a plurality of anti-crack blocks that are at least located in the first corner area. The anti-crack retaining wall is formed on the anti-crack base and located outside of the display area, and the plurality of anti-crack blocks are formed on the anti-crack base and located on the side of the anti-crack retaining wall away from the display area.