Layered Fabric Touch Panel for Simple Resistance-Based Sensing
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Solution Overview
Problem
Existing fabric touch panels require complex processing to achieve varying resistances at different positions, making them difficult to manufacture.
Innovation Solution
A fabric touch panel with a uniform middle conductor layer and separate upper and lower conductor layers that form conductive paths upon external force, allowing for simple processing and accurate coordinate determination based on conductive resistance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the middle conductor layer uses varying resistances at different positions to identify pressure coordinates, then the coordinate identification accuracy is improved, but the processing complexity and manufacturing difficulty increase
Solution Approach 1:
The conductor layer is segmented into multiple independent conductive paths, each with a unique resistance value. Instead of requiring the entire middle conductor layer to have spatially varying resistance, the system divides it into discrete segments (R1, R2, R3, etc.) that can be independently controlled and measured, simplifying the manufacturing process while maintaining coordinate identification accuracy
Solution Approach 2:
The invention changes the resistance parameter distribution from a continuous spatial gradient to discrete resistance values along specific conductive paths. By measuring resistance changes in segmented paths rather than requiring spatially varying resistance across the entire layer, the system achieves accurate coordinate identification with simpler processing
2Measurement precision
If special yarn or repeated printings are used to create varying resistance in the middle conductor layer, then the coordinate measurement capability is improved, but the device complexity and processing steps increase
Solution Approach 1:
The conductor layer is divided into multiple independent conductive paths with distinct resistance values, eliminating the need for complex spatial resistance patterns. This segmentation allows for simpler material selection and processing while maintaining the ability to accurately measure pressure positions through resistance measurements
Solution Approach 2:
Instead of making the middle conductor layer itself have varying resistance across space, the invention inverts the approach by creating multiple separate conductive paths with different resistance values. This reversal simplifies the middle layer structure while achieving the same measurement functionality
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 solution enables easy processing and high accuracy in identifying pressed coordinates with a simple structure, utilizing textile materials for flexibility and comfort.
Implementation Method 1
a voltage is applied to the first semiconductor and the second semiconductor, electrostatic forces are generated, and the upper conductor layer and the lower conductor layer move towards the middle conductor layer
Implementation Method 2
the first good conductor is in contact with the middle conductor layer, such that the first semiconductor and the middle conductor layer form a first conductive path, and a first conductive resistance value obtained by conduction of the first conductive path uniquely corresponds to a coordinate
Data Source
AI summary
A fabric touch panel, includes an upper conductor layer, a middle conductor layer, and a lower conductor layer, the middle conductor layer being a good conductor layer. When the fabric touch panel is subjected to an external force, a first good conductor is in contact with the middle conductor layer, such that a first semiconductor and the middle conductor layer form a first conductive path, and a first conductive resistance value obtained by conduction of the first conductive path uniquely corresponds to a coordinate in a first direction of a plane; and a second good conductor is in contact with the middle conductor layer, such that a second semiconductor and the middle conductor layer form a second conductive path, and a second conductive resistance value obtained by conduction of the second conductive path uniquely corresponds to a coordinate in a second direction of the plane.