Stretchable Display Structure for Reduced Soft-Part Strain
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Solution Overview
Problem
Stretchable display devices face issues with strain concentration in soft parts due to mismatched stretch rates between rigid and soft components, leading to potential damage and reduced reliability.
Innovation Solution
The solution involves connecting horizontal and vertical lines between adjacent rigid parts to two sides of the rigid parts, reducing strain on the soft parts by classifying rigid parts into groups and disposing light emitting diodes at the corners, and using a damage preventing layer to stabilize connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the rigid part is not stretched to maintain its structure, then the pixel arrangement and resolution are maintained, but a higher strain is applied to the soft part
Solution Approach 1:
The display device is segmented into multiple rigid parts (first rigid part, second rigid part, etc.) separated by soft parts. This segmentation allows each rigid part to maintain its structural integrity and pixel arrangement independently, while the soft parts between them can accommodate strain during stretching without transmitting excessive force to the rigid structures.
Solution Approach 2:
The soft part acts as an intermediary element between adjacent rigid parts. It receives the stretching force and dissipates it through its own deformation, preventing direct transmission of high strain to the rigid parts while maintaining the overall display structure during stretching operations.
2Manufacturing precision
If the area of the soft part is decreased and the area of the rigid part is increased for higher resolution, then the display resolution is improved, but the strain applied to the soft part increases
Solution Approach 1:
Different regions of the display device are assigned different mechanical properties: rigid parts have high rigidity to maintain pixel structures and resolution, while soft parts have low rigidity to accommodate strain. This local differentiation of material properties allows the system to achieve high resolution without concentrating excessive strain on the soft parts.
3Stability of the object's composition
If connection lines are connected to multiple sides of rigid parts, then the structural stability is improved, but the strain concentration on soft parts increases
Solution Approach 1:
The connection structure is segmented into vertical connection lines and horizontal connection lines that connect to specific sides of rigid parts. This segmentation allows strategic placement of connections to maintain structural stability while avoiding concentration of strain on the soft parts, as each connection line operates independently in its designated direction.
Data Source
AI summary
A display device includes: first and second substrates facing and spaced apart from each other; a plurality of third substrates on an inner surface of the first substrate; a plurality of vertical lines between two of the plurality of third substrates adjacent to each other along a first direction; a plurality of horizontal lines between two of the plurality of third substrates adjacent to each other along a second direction crossing the first direction; a plurality of vertical connection lines connecting a first side of one of the plurality of third substrates and the plurality of vertical lines; a plurality of horizontal connection lines connecting a second side adjacent to the first side of the one of the plurality of third substrates and the plurality of horizontal lines; and a plurality of light emitting diodes on the plurality of third substrates, respectively.