Stretchable Display Module Islands Bridges Stress Distribution
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Solution Overview
Problem
Current flexible display modules break due to local stress concentration caused by uneven forces during stretching, leading to the failure of stretchable units.
Innovation Solution
A stretchable display module design featuring islands and bridges with specific structural elements, including bending parts and straight parts, that distribute forces uniformly across the module, preventing local stress concentration and allowing for simultaneous deformation of islands and balanced forces on bridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional flexible display module structures are used during stretching, then the display module can be stretched, but local stress concentration occurs causing stretchable units to break
Solution Approach 1:
The display module is divided into multiple independent islands connected by bridges, where each island contains pixel units and bridges contain wirings. This segmentation allows each component to deform independently during stretching, distributing stress uniformly and preventing local stress concentration that would cause breakage.
Solution Approach 2:
The bridges are designed with bending parts that can dynamically change shape during stretching. The bending parts include first and second bending directions with different curvature radii, allowing the bridge structure to adapt its geometry in real-time to distribute mechanical stress uniformly across the display module during deformation.
2Ease of operation
If the bending parts protrude from the connecting line, then the bridge structure has more flexibility, but stress distribution becomes uneven causing local stress concentration
Solution Approach 1:
The bending parts are designed with asymmetric protrusion characteristics: bending parts in the first bending direction do not protrude from the connecting line, while bending parts in the second bending direction protrude from the connecting line. This asymmetric design optimizes both flexibility and stress distribution by allowing controlled deformation in specific directions while maintaining structural balance.
Solution Approach 2:
Different regions of the bridge structure have different geometric properties - the bending parts have specific curvature radii and protrusion characteristics tailored to their local stress requirements. This local quality optimization ensures that each part of the bridge deforms appropriately under stress while maintaining overall stress distribution uniformity.
Data Source
AI summary
A stretchable display module is disclosed. The stretchable display module includes a plurality of islands and a plurality of bridges. Each of the bridges includes a first connection part, a second connection part, and a plurality of bending parts, the first connection part is connected to a first side of one of the islands, and the second connection part is connected to a second side of another adjacent island. The first side includes a first endpoint and a second endpoint, and the second side includes a third endpoint on a same side as the first endpoint and a fourth endpoint on a same side as the second endpoint. The bending parts do not protrude from a connecting line between the first endpoint and the third endpoint.