Foldable Display Reinforcing Board for Central Crease Prevention
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Solution Overview
Problem
Existing foldable display apparatuses suffer from creasing issues due to repeated folding, particularly in the central portion where pressure-sensitive adhesives and films are prone to deformation.
Innovation Solution
A reinforcing board with a central portion having a reduced thickness and reinforcement members arranged such that their height decreases linearly away from the center, with the centermost member having the greatest height, and featuring stripe patterns with alternating openings and blocking portions to enhance folding performance while preventing creasing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reinforcing layer has uniform thickness, then the manufacturing process is simple, but the central portion cannot effectively prevent creasing of the pressure sensitive adhesive and film during folding
Solution Approach 1:
The reinforcing layer is designed with non-uniform thickness, where the central portion has a first thickness and the edge portion has a second thickness greater than the first thickness. This local variation in thickness provides enhanced support exactly where creasing occurs during folding, while maintaining simplicity in other areas.
Solution Approach 2:
The reinforcing layer is divided into distinct regions: a central portion and an edge portion with different thicknesses. This segmentation allows each region to serve its specific function - the central portion prevents creasing while the edge portion provides structural support.
2Reliability
If reinforcement members are added to prevent creasing, then the structural support is improved, but the weight and complexity of the reinforcing board increases
Solution Approach 1:
The reinforcement members have a plate-like structure with relatively small thickness compared to their lateral dimensions. This thin-film approach provides the necessary structural support while minimizing the addition of weight to the foldable display apparatus.
3Adaptability or versatility
If the central portion of the reinforcing layer is made thinner, then the flexibility during folding is improved, but the overall strength is reduced
Solution Approach 1:
The reinforcing layer has different thicknesses in different regions: the central portion is thinner to allow flexibility during folding, while the edge portion is thicker to maintain overall structural strength. This local differentiation resolves the contradiction between flexibility and strength.
Solution Approach 2:
The reinforcing layer is segmented into a central portion and an edge portion with different thickness characteristics. This segmentation enables the central area to be more flexible while the edge area provides structural reinforcement.
Data Source
AI summary
A reinforcing board includes a reinforcing layer that includes a central portion that is thinner than an edge portion, and a plurality of reinforcement members disposed on the central portion. A height of a reinforcement member disposed in a center of the central portion is greater than a height of a reinforcement member disposed in an outer side of the central portion.