Stretchable Display Line Structure With Floating Connection Lines
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Solution Overview
Problem
Conventional display devices face challenges in maintaining stretching reliability and reducing stress on line units during deformation, as they are prone to interference and structural limitations that hinder their flexibility and durability.
Innovation Solution
A stretchable display device design featuring a lower substrate with a pattern layer and connection lines that include grooves to separate the adhesive layer, allowing the line units to float within a filling layer, thereby reducing interference and enhancing stretchability through various structural configurations such as semicircular and linear portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If line units are directly attached to the adhesive layer, then structural stability is improved, but stretching reliability deteriorates due to interference and stress concentration
Solution Approach 1:
The patent introduces a filling layer as an intermediary substance between the adhesive layer and line units. This filling layer allows the line units to float rather than being directly attached, reducing stress concentration and interference during stretching while maintaining structural stability through the combined support of the adhesive layer and filling layer
2Strength
If line units are directly attached to the adhesive layer, then structural support is improved, but stress on line units increases during stretching
Solution Approach 1:
The filling layer acts as a stress-distributing intermediary that reduces direct stress concentration on the line units during stretching. It provides buoyant support while allowing the line units to move more freely, thereby reducing the stress and interference they experience during deformation
3Reliability
If line units are covered with liquid material, then interference during stretching is reduced, but device complexity increases
Solution Approach 1:
The patent segments the adhesive layer into two functional parts: the adhesive layer itself for bonding, and the filling layer for providing liquid support and reducing interference. This segmentation allows each layer to perform its specific function independently, improving stretching reliability while keeping the overall structure manageable through clear functional division
Data Source
AI summary
A display device according to an exemplary embodiment of the present disclosure may include a lower substrate that is stretchable; a first adhesive layer disposed on the lower substrate; a pattern layer disposed on the first adhesive layer and including a plurality of first line patterns; a plurality of connection lines disposed on each of the plurality of first line patterns; and a filling layer covering the pattern layer and the plurality of connection lines, wherein the plurality of first line patterns include grooves disposed in lower portions thereof, so that the plurality of first line patterns and the plurality of connection lines are separated from the first adhesive layer and easily stretched.