Stretchable Pixel Array Wiring Layout for Strain Distribution
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Solution Overview
Problem
Stretchable electronic products face structural fractures and open circuits when stretched, due to inadequate stress management, compromising their reliability.
Innovation Solution
A stretchable pixel array substrate design featuring a base with first and second regions, where pixel structures are on the first regions and wiring with curved segments is on the second region, with specific curvature and distance configurations to distribute strain effectively, reducing maximum strain on the wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wiring is stretched directly, then the stretchability is improved, but the wiring may fracture or open circuit due to stress concentration
Solution Approach 1:
The wiring is divided into multiple curved segments connected in series, where each segment can independently deform under stress. This segmentation distributes the strain across multiple locations rather than concentrating it in one place, preventing fracture while maintaining electrical connectivity
Solution Approach 2:
Each wiring segment is designed with a curved geometry comprising three curved portions. The curved structure allows the wiring to elongate through deformation of the curve rather than straight-line stretching, accommodating stress and preventing open circuits while maintaining electrical connection
2Ease of manufacture
If the curved segments have uniform geometry, then the manufacturing is simplified, but the strain distribution is not optimized
Solution Approach 1:
The curved segments have non-uniform geometry where the first curved segment (closest to pixel structures) has a larger distance A between its first and second curved portions compared to distance B in other segments. This local variation optimizes strain distribution by providing greater deformation capacity at critical locations near the pixel structures, while maintaining acceptable resistance levels
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 significantly improves the stretchability and reliability of the pixel array substrate by reducing maximum strain on the wiring, as demonstrated by comparison with conventional designs, maintaining functionality under stretching.
Implementation Method 1
The wiring includes a plurality of curved segments serially connected to each other, each of the curved segments has a first curved portion, a second curved portion, and a third curved portion... significantly reduces the maximum strain on the wiring
Data Source
AI summary
A stretchable pixel array substrate includes a base, pixel structures, and a wiring. The base has first regions and a second region. The pixel structures are respectively disposed on the first regions of the base. The wiring is disposed on the second region of the base. Curved segments of the wiring include a first curved segment and a second curved segment. One of the pixel structures is disposed on one of the first regions. The first curved segment is disposed between the one of the pixel structures and the second curved segment. A distance A exists between a first curved portion and a second curved portion of the first curved segment in a first direction, a distance B exists between a first curved portion and a second curved portion of the second curved segment in the first direction, and A>B.