Curved Winder Fixing Portions for Rollable Display Panel Stress Reduction
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Solution Overview
Problem
Foldable and rollable display devices face challenges in minimizing stress on their panels, which can lead to reduced lifetime and potential damage.
Innovation Solution
A display device with a winder system featuring curved fixing portions that interpose the display panel's peripheral area, allowing for convex and concave curvature to reduce stress, and a fastening mechanism to securely fix the panel, utilizing materials like stainless steel or acryl for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display panel is fixed using a conventional flat winder, then the fixing structure is simple, but stress concentrates on the panel causing reduced lifetime
Solution Approach 1:
The winder structure employs curved surfaces (first and second curved surfaces) instead of flat surfaces to contact the display panel. This curvature distribution allows stress to be dispersed across a larger area of the panel when wound, preventing stress concentration at specific points and thereby extending the panel's lifetime.
2Strength
If the display panel is wound tightly on the winder, then the panel is securely fixed, but stress and compression forces increase on the panel
Solution Approach 1:
The curved surfaces of the winder create a more gradual transition when the panel is wound around it, distributing the compressive forces across a broader area. This reduces peak stress values while maintaining adequate fixing strength, unlike sharp edges or flat surfaces that would concentrate forces.
3Stress or pressure
If the winder uses a single curved surface, then the structure is simple, but stress distribution on the panel is insufficient
Solution Approach 1:
By implementing both a first curved surface and a second curved surface on the winder, the patent creates a more effective stress distribution system. The panel contacts both curved surfaces when wound, allowing stress to be dispersed across multiple contact zones rather than a single area, enhancing protection without excessive complexity.
Data Source
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AI summary
A display device, comprising: a display panel (100) configured to display an image; and a winder (300, 500) configured to fix a first end portion of the display panel thereinto, wherein the winder includes: a first fixing portion (310) including a first external surface which is curved, and a second fixing portion (330) including a second external surface which is curved and that faces the first external surface. The first end portion of the display panel is interposed between the first external surface and the second external surface and the first external surface includes a first curved surface and a second curved surface adjacent to each other, wherein the first curved surface is convexly curved and the second curved surface is concavely curved.