Stretchable Device Wiring Noise Reduction
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Solution Overview
Problem
Conventional stretchable devices experience noise interference and discomfort when their wiring comes into contact with the skin during biological signal detection, as the wiring directly contacts the body.
Innovation Solution
A stretchable device design featuring a substrate with a main body and projecting pieces, where the wiring is placed on one surface and the bioelectrode on another, minimizing direct contact with the skin, and an adhesive layer for secure attachment, allowing the bioelectrode to detect signals while reducing noise and discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the stretchable wiring is arranged on the first main surface and the device is attached to a living body, then the bioelectrode can detect biological signals, but the stretchable wiring comes into contact with the living body causing noise and discomfort
Solution Approach 1:
The patent introduces a projecting piece portion that extends from the first main surface toward the second main surface, creating a three-dimensional structure. The bioelectrode is arranged on the third main surface of the projecting piece portion, which is continuous with the first main surface, while the fourth main surface faces the second main surface. This dimensional arrangement allows the bioelectrode to contact the living body for signal detection while the stretchable wiring on the first main surface remains separated from the living body, thus resolving the contradiction between signal detection capability and noise reduction.
2Device complexity
If the stretchable wiring comes into contact with the skin, then the device structure is simplified, but discomfort is given to the subject
Solution Approach 1:
The patent segments the device into distinct functional portions: the main body portion with the stretchable wiring on the first main surface, and the projecting piece portion with the bioelectrode on the third main surface. This segmentation allows the wiring and bioelectrode to be spatially separated, enabling the wiring to remain away from the skin while the bioelectrode contacts the living body for signal detection, thus reducing discomfort without significantly increasing device complexity.
Data Source
AI summary
A stretchable device that includes: a stretchable substrate that includes: a main body portion having a first main surface and a second main surface facing the first main surface, and a projecting piece portion connected to the main body portion, the projecting piece portion having a third main surface continuous with the first main surface and a fourth main surface continuous with the second main surface and facing the third main surface; a stretchable wiring, wherein at least a part of the stretchable wiring is arranged on the first main surface of the main body portion of the stretchable substrate; and a bioelectrode arranged on the third main surface of the projecting piece portion of the stretchable substrate and electrically connected to the stretchable wiring.