Electromagnetic Touch Coil Wiring With Parallel Conductors
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Solution Overview
Problem
Existing touch technologies face challenges in achieving high sensitivity and cost-effectiveness while maintaining a compact size, particularly in electromagnetic touch devices.
Innovation Solution
The electromagnetic touch device employs sensor coils with parallel conductor wires forming low-impedance coil wiring, allowing for increased sensing signals and reduced resistance, which enhances touch sensitivity without the need for a high-density layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-density coil layout is used to improve touch sensitivity, then touch sensitivity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the electrical parameters of the coil wiring by using parallel conductor wires to reduce impedance to 4 ohms or less. This parameter change allows the coil to generate sufficient sensing signals without requiring high-density arrangement, thus resolving the contradiction between touch sensitivity and device complexity
Solution Approach 2:
The patent transitions from considering only the spatial density of coil arrangement to incorporating the electrical dimension (impedance) as a key parameter. By optimizing the electrical characteristics through parallel wiring, the system achieves good touch sensitivity without being constrained by spatial density requirements
2Measurement precision
If low-impedance coil wiring is implemented to increase sensing signals, then touch sensitivity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the coil wiring into multiple parallel conductor wires, each contributing to the overall low-impedance pathway. This segmentation approach makes the low-impedance target more achievable through standard manufacturing processes compared to requiring a single ultra-low-resistance wire
Solution Approach 2:
The patent combines multiple conductor wires in parallel to achieve the target impedance of 4 ohms or less. By merging multiple standard-resistance wires in parallel, the system achieves low overall impedance without requiring each individual wire to meet extremely stringent resistance specifications
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 provides good touch sensitivity with reduced impedance, enabling effective touch sensing capabilities while minimizing the need for dense coil arrangements, thus improving efficiency and reducing potential defects.
Implementation Method 1
The electromagnetic touch device uses the parallel conductor wires to form the coil wiring of the sensor coil, which may provide a low-impedance coil wiring, thereby increasing the amount of sensing signals
Data Source
AI summary
An electromagnetic touch device including a sensor panel and a driving circuit is provided. The sensor panel includes multiple sensor coils independently driven. Each of the sensor coils includes a first connecting terminal, a second connecting terminal, and a coil wiring connected between the first connecting terminal and the second connecting terminal. The coil wiring includes multiple conductor wires that are connected in parallel. The driving circuit is electrically connected to the sensor coils.