Grooved Folding Window Structure for Flexible Display Durability
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Solution Overview
Problem
Flexible display devices face issues with window deformation and damage due to folding or bending operations and external impacts.
Innovation Solution
A window design featuring recessed grooves in folding portions and peripheral areas, allowing for improved flexibility and mechanical strength, with grooves aligned to reduce stress and enhance durability during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the window is made flexible to enable folding operations, then the adaptability is improved, but the strength and reliability deteriorate due to deformation and damage from folding and external impacts
Solution Approach 1:
The window is divided into multiple folding portions with grooves created at specific regions. These grooves segment the continuous structure into zones that can flex independently, allowing the window to fold while maintaining overall structural integrity. The grooves act as predetermined weak points that control deformation locations, preventing random cracking across the entire window surface.
Solution Approach 2:
Different regions of the window have different structural properties. The folding portions contain grooves to enable flexibility, while the peripheral portions maintain solid structure for strength. This local differentiation allows the window to have both flexible folding areas and strong support areas, resolving the contradiction between adaptability and strength.
2Ease of operation
If grooves are added to the folding portions to improve flexibility, then the ease of operation is improved, but the manufacturing precision requirements increase due to the need for precise groove positioning and dimensions
Solution Approach 1:
The grooves are pre-formed in the window structure before final assembly. This preliminary action of creating controlled weak points allows the folding operation to proceed smoothly without requiring high precision during the actual folding operation. The grooves are positioned and sized in advance to ensure proper flexing behavior.
Solution Approach 2:
The groove dimensions and positioning are carefully controlled within specific parameter ranges. By optimizing groove depth, width, and spacing, the design achieves adequate flexibility without requiring extremely tight manufacturing tolerances. The parameter optimization balances manufacturing feasibility with operational performance.
Data Source
AI summary
A window includes a first folding portion foldable about a first folding axis extended in a first direction, and including upper and lower surfaces facing each other, and a second folding portion foldable about a second folding axis extended in a second direction crossing the first direction, including the upper and lower surfaces, and including a portion of the first folding portion. First upper grooves extended in the first direction and recessed from the upper surface and first lower grooves extended in the first direction and recessed from the lower surface are defined in the first folding portion, and second upper grooves extended in the second direction and recessed from the upper surface and second lower grooves extended in the second direction and recessed from the lower surface are defined in the second folding portion. The portion is defined as a crossing portion in which the grooves are defined.