Stretchable Display Fastening Structure
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Solution Overview
Problem
Existing stretchable display devices face challenges in maintaining a secure fastening structure when stretched, as conventional fastening methods like pins or adhesives can damage the panel and lead to easy separation under stress.
Innovation Solution
A stretchable display device with a fastening structure featuring a poly dimethyl siloxane (PDMS) substrate and a hardening fixing part made of the same material, where the fixing part is integrally connected to both edges of the substrate within a fastening structure with a larger inner region cross-sectional area, providing increased hardness and secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fastening methods (pins or adhesives) are used, then the fastening structure can be assembled, but the panel is damaged and separation occurs easily under stress
Solution Approach 1:
The fastening fixing part is integrally connected to both the display panel and the fastening structure, merging three components (panel, fastening part, and fastening structure) into a unified structure. This integration eliminates the weakness of separate fastening methods where pins or adhesives create stress concentration points, allowing the entire assembly to withstand stretching forces without separation or damage.
2Reliability
If the fastening fixing part is made of the same stretchable material as the substrate, then stress is minimized during stretching, but the hardness and fastening force are reduced
Solution Approach 1:
The fastening fixing part is designed with locally differentiated properties: it uses the same stretchable material as the substrate to minimize stress during stretching, but incorporates a hardened surface layer specifically at the fastening interface. This local hardening provides the necessary friction and mechanical interlocking for strong attachment, while the bulk material remains stretchable to prevent stress concentration during device deformation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the fastening force and minimizes stress on the display panel during stretching, preventing easy separation and ensuring durability and reliability of the display device.
Implementation Method 1
injecting a liquefied stretchable material into a mold and hardening the liquefied stretchable material such that a stretchable substrate is formed by injection molding
Implementation Method 2
the mold may be heated at a predetermined temperature to harden the stretchable material
Implementation Method 3
injecting a liquefied stretchable material into the inner region of the fastening structure, inserting an edge portion of the stretchable substrate into the inner region through the inlet, and hardening the liquefied stretchable material and molding a fastening fixing part
Implementation Method 4
the fastening structure is heated at a temperature higher than a heating temperature of the mold in forming the stretchable substrate
Data Source
AI summary
A stretchable display device includes a display panel made of a stretchable material, a fastening structure fastened to an edge of the display panel, and a fastening fixing part fixed to the fastening structure and integrally connected to the edge of the display panel.