Patterned Elastic Member for Foldable Substrate Reliability
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Solution Overview
Problem
Flexible or foldable display devices experience reliability issues due to cracks and deformations in the substrate caused by repeated folding and unfolding, necessitating improved control over the size, position, and arrangement of pattern parts to enhance folding reliability.
Innovation Solution
An elastic member with defined unfolding and folding areas, featuring specific patterns and non-patterned areas to manage stress distribution and minimize deformation, ensuring consistent strength and alignment during folding and unfolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pattern parts such as holes or grooves are formed in the elastic member to prevent deformation, then deformation resistance is improved, but strength and supporting force are reduced
Solution Approach 1:
The patent applies different pattern configurations to different regions of the elastic member. The folding area includes pattern parts (holes or grooves) to prevent deformation during folding, while the unfolding area excludes pattern parts to maintain strength and supporting force. This local differentiation resolves the contradiction by optimizing each region for its specific functional requirement.
2Reliability
If pattern parts are formed in both folding and unfolding areas, then folding reliability is improved, but strength is reduced
Solution Approach 1:
The patent differentiates the elastic member into two functional zones: the folding area with pattern parts for reliability and the unfolding area without pattern parts for strength. This spatial separation allows each zone to be optimized independently, resolving the contradiction between folding reliability and overall strength.
3Ease of operation
If the opening ratio is increased to improve folding flexibility, then folding ease is improved, but strength is reduced
Solution Approach 1:
The patent applies pattern parts with specific opening ratios selectively in the folding area to enable flexible folding, while maintaining a solid structure (no pattern parts) in the unfolding area to preserve strength. This localized approach allows high folding flexibility without compromising overall structural strength.
Data Source
AI summary
Proposed is an elastic member capable of ensuring folding reliability and preventing deformation of a substrate, the elastic member comprising: a first surface; and a second surface opposite to the first surface, wherein the elastic member includes a first area and a second area, wherein the first area comprises: a first pattern portion in which a plurality of first patterns are arranged extending in a first direction; and a second pattern portion in which a plurality of second patterns are arranged extending in the first direction and which partially overlaps with the first pattern portion in a second direction different from the first direction, and the second area comprises: a third pattern portion in which a plurality of third patterns are arranged extending in the first direction; and a fourth pattern portion in which a plurality of fourth patterns are arranged extending in the first direction and which partially overlaps with the third pattern portion in the second direction different from the first direction.