Rollable Display Panel Inflection Point Stress Distribution
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Solution Overview
Problem
Conventional rollable displays suffer from stress concentration issues due to the lack of stress distribution in flexible display panels, leading to potential cracks and reduced display quality when rolled or stretched.
Innovation Solution
The introduction of a flexible display panel with a point of inflection, which includes concave and convex portions, is accommodated in a housing with a reel core, allowing the panel to be rolled along the reel's outer surface, thereby distributing stress and reducing the likelihood of cracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible display panel is rolled without a point of inflection, then the device can be compactly stored, but stress concentration occurs leading to cracks and reduced display quality
Solution Approach 1:
The flexible display panel incorporates a point of inflection at a specific location to create localized stress distribution characteristics. This point of inflection causes the panel to form a convex shape during rolling, which concentrates stress at a controlled location rather than distributing it uniformly, thereby preventing cracks in the display area while maintaining compact storage capability
Solution Approach 2:
The patent utilizes the convex curvature formed by the point of inflection during the rolling process. This curvature geometry naturally directs stress away from the display panel's flat areas and concentrates it at the convex point, protecting the display quality while enabling compact storage
2Ease of operation
If the flexible display panel is made more flexible to improve rollability, then mobility increases, but the panel becomes more susceptible to cracking
Solution Approach 1:
The flexible display panel has non-uniform flexibility characteristics due to the point of inflection. The panel is designed to be flexible enough for rolling and storage, but the point of inflection creates a localized rigid structure that prevents cracking, thus maintaining both mobility and crack resistance
Data Source
AI summary
A rollable display is disclosed. In one aspect, the rollable display includes a flexible display panel configured to display an image via at least a portion thereof and a housing accommodating at least a portion of the flexible display panel. The flexible display panel has a point of inflection in the portion of the flexible display panel accommodated in the housing.