Fabric Strands with Embedded Circuitry for Wearable Input-Output
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Solution Overview
Problem
Fabric-based items with embedded electrical circuitry often fail to provide desired user input and output features due to bulkiness, heaviness, and unattractiveness, as existing methods do not effectively integrate circuitry into fabric without compromising its properties.
Innovation Solution
The integration of conductive lines and electrical components into strands of material, such as polymers, which are woven or knit to form fabric, allowing for customizable circuit formation using computer-controlled assembly equipment, enabling input gathering and output provision like visual, audio, and tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrical circuitry is incorporated into fabric-based items, then input-output capabilities are improved, but the items become bulky and heavy
Solution Approach 1:
The circuitry is segmented into discrete components embedded within individual strands. Each strand contains specific circuit elements (conductors, resistors, capacitors, sensors, actuators) distributed along its length, allowing the fabric to achieve desired input-output capabilities while minimizing overall weight by only including necessary components in specific locations.
Solution Approach 2:
Electrical circuitry is nested within the fabric structure itself. Conductors and components are embedded inside the polymer strands that form the fabric, with conductors positioned at the center and insulating material surrounding them. This nesting eliminates separate circuit boards and wiring harnesses, dramatically reducing weight.
2Adaptability or versatility
If electrical circuitry is incorporated into fabric-based items, then input-output capabilities are improved, but the items become unattractive
Solution Approach 1:
The functional circuitry and aesthetic fabric structure are merged into a single integrated material. The polymer strands simultaneously provide mechanical strength, flexibility, and electrical functionality, eliminating the visual disparity between separate fabric and circuit components. The fabric maintains its aesthetic properties while embedded circuitry provides desired input-output capabilities.
Solution Approach 2:
The circuitry is embedded within thin polymer strands that maintain fabric flexibility and drape. The insulating material surrounding conductors forms a thin protective shell that allows the fabric to bend and flex naturally while protecting embedded electrical components, preserving aesthetic appearance.
3Adaptability or versatility
If custom circuit functions are implemented in fabric, then functionality is improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into standardized steps: forming polymer strands with embedded conductors, cutting strands to required lengths, and joining segments using thermal or ultrasonic bonding. This segmentation allows custom circuit functions to be achieved through different combinations of standardized components, simplifying manufacturing while maintaining functionality.
Solution Approach 2:
Custom circuit functions are achieved by varying parameters such as conductor material composition, strand diameter, component density, and joining temperature rather than changing the fundamental manufacturing process. This allows diverse circuit configurations to be produced using the same basic equipment and methods.
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
This approach allows for the creation of fabric-based items that can interact with users and environments through embedded circuitry, offering desired input-output capabilities while maintaining the aesthetic and mechanical properties of fabric, thus addressing the limitations of bulkiness and unattractiveness in existing solutions.
Implementation Method 1
Strand segments may include thermoplastic material and may be thermally joined or joined using other joining techniques
Data Source
AI summary
A fabric-based item may include fabric formed from intertwined strands of material with embedded circuitry. The strands of material may be formed from dielectric materials such as polymers. The strands of material may be formed from joined segments of polymer strand material or other material. Each joined segment may contain a potentially distinct circuit. Some joined segments may include one or more conductive lines. The conductive lines may run parallel to each other along the length of the joined segments to form circuit interconnects. Conductive lines may be joined to contact pads on integrated circuits and other embedded components formed from semiconductor dies. Control circuitry formed from the integrated circuits embedded in strands of material in the fabric and other control circuitry may be used to control the circuitry embedded in the fabric.