Textile electrode connections
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Solution Overview
Problem
Textile electrodes face high impedance issues when dry, leading to poor physiological signal quality due to inadequate moisture retention, with existing solutions either relying on user sweat or bulky fluid reservoirs, which are unpredictable and prone to bacterial growth.
Innovation Solution
A knitted textile system with a conductive trace region and a moisture reservoir, sealed with an outer patch to maintain moisture and reduce impedance, using a hybrid yarn with insulating and conductive components, and a laser-ablated area for electrical connection, ensuring a stable and bacteria-resistant interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate fluid reservoir and active transport mechanism are used to maintain moisture in textile electrodes, then moisture level can be maintained, but device complexity and bulkiness increase
Solution Approach 1:
The patent extracts the moisture maintenance function from complex active transport systems and separates the conductive trace insulation from the textile structure itself. By integrating the insulating layer directly into the conductive trace construction and using selective ablation to expose conductive material only where needed, the design eliminates bulky fluid reservoirs while maintaining reliable moisture levels through passive capillary action in the hydrophilic textile electrode.
Solution Approach 2:
The patent merges the insulating function with the conductive trace structure by integrating an insulating layer directly onto the conductive material. This combined structure is then selectively ablated to create electrical connections, eliminating the need for separate insulation components and reducing overall device complexity while maintaining moisture retention through the hydrophilic textile matrix.
2Reliability
If semi-permeable membranes are used to maintain moisture in textile electrodes, then moisture retention improves, but ease of manufacture and cleaning deteriorate
Solution Approach 1:
The patent employs a disposable textile electrode design where the entire electrode assembly, including the hydrophilic moisture-retaining textile and integrated conductive traces, can be discarded after use. This eliminates the need for complex semi-permeable membranes that require cleaning and maintenance, while still providing reliable moisture retention during the electrode's service life. The conductive connections are created through selective ablation of insulating material, simplifying the manufacturing process.
3Reliability
If conductive material is exposed at the interface between conductive trace and textile electrode, then electrical connection improves, but bacterial growth risk increases
Solution Approach 1:
The patent applies local quality by creating exposed conductive material only at specific localized interfaces where electrical connection is needed, while the surrounding areas maintain their insulating or moisture-retaining properties. The selective ablation process exposes conductive traces precisely at the junction with the textile electrode, providing reliable electrical connection without creating large exposed surfaces that would promote bacterial growth. The hydrophilic textile matrix surrounding the connection point continues to provide a controlled moisture environment.
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 system provides a stable and efficient electrical connection with improved moisture retention, reducing impedance and enhancing signal quality while preventing bacterial growth and fluid evaporation.
Implementation Method 1
moisture level between the electrode and the user's skin to allow ionic conduction between the two interfaces
Implementation Method 2
conductive material, located at an intersection of an ablated area and the textile electrode region
Implementation Method 3
sealing film, placed around the conductive material, configured to protect the conductive material and seal the conductive material from one or more textile layers
Implementation Method 4
an outer sealing patch surrounding the textile electrode region and configured to provide a moisture barrier between the textile electrode region and the one or more surrounding textile layers
Data Source
AI summary
A knitted textile includes a textile electrode region, a conductive trace region that terminates in a knitted extension, conductive material, located at an intersection of an ablated area and the textile electrode region, configured to provide an electrical connection between the conductive trace region and the textile electrode region, sealing film, placed around the conductive material, configured to protect the conductive material and seal the conductive material from one or more textile layers that surround the electrical connection, and an outer sealing patch surrounding the textile electrode region and configured to provide a moisture barrier between the textile electrode region and the one or more surrounding textile layers. The conductive trace region includes one or more electrical conductors twisted with an insulator. The knitted extension is configured to overlay a portion of the textile electrode region and includes the ablated area where the insulator has been removed.