Stretchable Panel Electrode Structure for Stress Distribution
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Solution Overview
Problem
Stretchable panels face issues with stress concentration during stretching, leading to structural and functional deformation and damage, which reduces their electrical performance.
Innovation Solution
A stretchable panel design featuring a substrate with a wire electrode composed of a first conductive layer, an elastic layer with an uneven distribution of a second conductor, and a second conductive layer, which helps distribute stress and maintain electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a stretchable panel is designed to be flexible and stretchable, then it can adapt to motions of living body or shapes of object, but stress concentrates in specific region during stretching causing structural and functional deformation and damage
Solution Approach 1:
The wire electrode is divided into multiple layers (first conductive layer, elastic layer, second conductive layer) with different functions. The elastic layer segments the stress path, allowing deformation to be distributed across layers rather than concentrated in a single conductive layer, thus preventing structural damage while maintaining electrical connectivity.
Solution Approach 2:
The wire electrode uses a composite structure combining conductive materials (first and second conductive layers) with elastic material (elastic layer). This composite design allows the electrode to simultaneously provide electrical conductivity and mechanical flexibility, enabling the panel to stretch without causing stress concentration that would damage pure conductive structures.
2Ease of manufacture
If a wire electrode is made with uniform conductor distribution, then manufacturing is simplified, but stress concentration occurs during stretching leading to structural deformation
Solution Approach 1:
The elastic layer is designed with non-uniform thickness, creating local quality variations. The thickness is greater in regions where stress concentration is expected during stretching, providing enhanced structural support and stress distribution in those specific areas, while maintaining simpler construction in other regions.
3Ease of manufacture
If the elastic layer has uniform thickness, then manufacturing is easier, but stress is not effectively distributed during stretching
Solution Approach 1:
The elastic layer features non-uniform thickness with specific regions having greater thickness to correspond to areas of high stress concentration during stretching. This local variation in thickness optimizes stress distribution across the panel, providing enhanced durability in critical regions while maintaining overall manufacturability.
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 or prevents degradation of electrical performance while ensuring flexibility and stretchability, thereby enhancing the durability and functionality of the stretchable panel.
Implementation Method 1
an elastic layer, and a second conductive layer on the elastic layer
Implementation Method 2
the first conductive layer and the second conductive layer may be electrically connected
Data Source
AI summary
Disclosed are a stretchable panel and an electronic device including the same, the stretchable panel including a stretchable substrate, and a wire electrode on the stretchable substrate, wherein the wire electrode includes a first conductive layer including a first conductor, an clastic layer, and a second conductive layer disposed on the clastic layer and including a second conductor.