Foldable Cover Window Structure for Flexibility and Impact Resistance
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Solution Overview
Problem
Flexible display devices require a window that maintains high folding characteristics without degrading mechanical properties and provides improved impact resistance.
Innovation Solution
A window design with multiple folding portions, each having different radii of curvature and thicknesses, including non-folding and folding portions with specific thickness and recesses to enhance flexibility and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the window is made thinner to improve folding characteristics, then folding flexibility is improved, but impact resistance deteriorates
Solution Approach 1:
The window applies local quality by having different thicknesses at different locations: the first folding portion has a first thickness while the second folding portion has a second thickness greater than the first thickness. This allows the thinner first folding portion to provide better folding flexibility while the thicker second folding portion provides improved impact resistance, resolving the contradiction between folding flexibility and impact resistance.
2Reliability
If the window structure is made more complex with multiple folding portions of different thicknesses, then folding characteristics and impact resistance are improved, but manufacturing complexity increases
Solution Approach 1:
The window employs parameter changes by varying the thickness parameter across different portions of the window structure. The first folding portion has a first thickness and the second folding portion has a second thickness greater than the first thickness, allowing optimization of both folding characteristics and impact resistance through controlled parameter variation rather than complex structural additions.
Data Source
AI summary
A window, which is a cover window for an electronic device and has an upper surface and a lower surface opposite to each other in a thickness direction, includes a non-folding portion including a first non-folding portion, a second non-folding portion, and a third non-folding portion spaced apart from one another, a first folding portion disposed between the first non-folding portion and the second non-folding portion and foldable to have a first radius of curvature, and a second folding portion disposed between the second non-folding portion and the third non-folding portion and foldable to have a second radius of curvature greater than the first radius of curvature, and the first folding portion is thinner than the second folding portion.