Stretchable Display Buffer Area Stress Distribution
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Solution Overview
Problem
Stretchable display devices face damage and cracking when stretched due to concentrated stress at clamp contact areas, leading to potential breakage and reduced durability.
Innovation Solution
A stretchable display device design featuring a buffer area with high extension rupture rate adjacent to grip areas, where clamps are applied, and ductile connection lines to distribute stress and protect connections from external forces, along with rigid substrates and layers to enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a clamp is applied to stretch the display device, then the display device can be stretched and changed in various forms, but stress concentration at the clamp contact area causes damage and cracking to the display panel
Solution Approach 1:
The patent applies local quality by creating a buffer area with different mechanical properties (higher extension rupture rate) specifically at the clamp contact region, while maintaining different material properties in the display area. This localized differentiation allows the clamp contact area to withstand stretching stresses without transmitting damaging concentrated forces to the display panel, thereby resolving the contradiction between stretchability and damage resistance.
Solution Approach 2:
The buffer area acts as an intermediary element between the clamp and the display panel. It absorbs and distributes the stretching stress, preventing direct transmission of concentrated forces to the display panel. This intermediary structure enables the display device to be stretched reliably while protecting the display panel from damage.
2Adaptability or versatility
If the display device is stretched using a clamp, then flexibility and form change are achieved, but cracks and breakage occur at the clamp contact area
Solution Approach 1:
The buffer area is designed with locally differentiated material properties (higher extension rupture rate) specifically where the clamp contacts the display device. This local quality enhancement allows the clamp contact area to withstand stretching forces without cracking, while the rest of the display maintains its structural integrity and functionality.
Solution Approach 2:
The buffer area serves as a pre-configured cushioning zone that absorbs stretching stresses before they can propagate to critical areas. By placing this high-extension-rupture-rate area beforehand at the clamp contact region, the patent prevents cracks and breakage from occurring during stretching operations.
3Strength
If connection lines are made rigid to maintain structural integrity, then strength is improved, but ductility and ability to withstand stretching forces are reduced
Solution Approach 1:
The patent applies local quality by positioning connection lines with higher ductile breaking rates specifically in the buffer area, while maintaining appropriate material properties in the display area. This localized differentiation allows connection lines to withstand stretching forces in the buffer zone without compromising the overall structural integrity of the display device.
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 design effectively reduces stress concentration, minimizes damage, and enhances the durability of the display device by distributing stress and protecting connections, allowing for reliable stretching and flexibility without breakage.
Implementation Method 1
a plurality of third connection lines which is disposed in the buffer area, connects the plurality of first connection lines and the plurality of second connection lines, and has a ductile breaking rate higher than that of the plurality of first connection lines
Implementation Method 2
configures a buffer area having a high extension rupture rate in the vicinity of an area in which a clamp is contacted to suppress cracks or breakage generated when the stretchable display device is stretched using a clamp
Implementation Method 3
at least one base substrate which is disposed in each of the plurality of grip areas; at least one rigid layer which overlaps at least one rigid substrate
Data Source
AI summary
A stretchable display device includes a plurality of grip areas in which a clamp is disposed, and a buffer area adjacent to the plurality of grip areas are defined; a plurality of pixel substrates which is disposed in the display area to be spaced apart from each other; at least one base substrate which is disposed in each of the plurality of grip areas; a plurality of first connection lines which is disposed in the display area and connects the plurality of pixels formed on the plurality of pixel substrates; a plurality of second connection lines disposed in the grip area; and a plurality of third connection lines which is disposed in the buffer area, connects the plurality of first connection lines and the plurality of second connection lines, and has a ductile breaking rate higher than that of the plurality of first connection lines.