Flexible Display Module Cover Stiffness via Composite Plates
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Solution Overview
Problem
Flexible display panels face issues with stiffness and deformation due to slipping between the display panel and the module cover during winding or unwinding from a roller, leading to potential damage.
Innovation Solution
A display device design featuring a roller with a flexible display panel wound or unwound therefrom, and a module cover with elongated plates arranged in a crossing direction, a film layer between the panel and plates, and a coating layer covering the plates to enhance stiffness and prevent slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display panel is made thinner and more flexible, then the display device can be wound around a roller, but the panel loses stiffness and becomes prone to deformation and damage during winding/unwinding
Solution Approach 1:
The module cover is constructed as a composite structure combining multiple plates (first plate, second plate, third plate) with different orientations and a film layer, creating a multi-layer composite that provides both flexibility for winding and sufficient stiffness to prevent deformation during the winding/unwinding process
Solution Approach 2:
The module cover is divided into multiple segmented plates (first plate extending in first direction, second plate extending in second direction, third plate extending in third direction) arranged in a grid-like pattern, where each segment can independently flex while collectively providing structural support and preventing panel deformation
2Length of moving object
If the module cover is made thinner to maintain flexibility, then the display device can be wound around a roller, but the cover becomes insufficient to prevent slipping between the display panel and cover
Solution Approach 1:
The multi-plate composite structure with film layer creates a mechanically interlocked system that prevents slipping between the display panel and module cover even when the overall cover thickness is minimized, as the distributed plate network provides multiple contact points and friction surfaces
Solution Approach 2:
The solution transitions from a single-plane thin cover to a three-dimensional multi-plate structure with plates extending in multiple directions (first, second, and third directions), creating a spatial network that prevents slipping while maintaining overall thinness
3Device complexity
If a simple single-plate module cover is used, then the structure is simple and easy to manufacture, but it cannot prevent deformation or damage during winding and unwinding processes
Solution Approach 1:
The module cover is segmented into multiple plates (first plate, second plate, third plate, and film layer) arranged in a systematic grid pattern, where each segment contributes to preventing deformation while the overall segmented structure remains relatively simple to manufacture through standardized plate components
Solution Approach 2:
Different regions of the module cover have different local structures - the first plate extends in the first direction to prevent deformation in that orientation, the second plate extends in the second direction for perpendicular protection, and the third plate extends in the third direction, with each local area optimized for its specific protective function
Data Source
AI summary
A display device is disclosed. The display device of the present disclosure comprises: a roller that extends to be long; a flexible display panel that is wound around the roller or is unwound therefrom; and a module cover which is coupled to the rear of the display panel, and in which a plurality of plates extending long in the longitudinal direction of the roller are sequentially arranged in the direction crossing the longitudinal direction, and which is wound around the roller or unwound therefrom together with the display panel, wherein the module cover comprises: the plurality of plates; a film layer positioned between the display panel and the plurality of plates; and a coating layer which covers the plurality of plates and which is in contact with the film layer.