Capacitive Hover Touch Sensor Interdigitated Electrode Design
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Solution Overview
Problem
Current multi hover touch technologies require a large number of capacitive detection channels, increasing manufacturing difficulty and cost due to complex electrode arrangements and high touch recognition accuracy demands.
Innovation Solution
A capacitive hover touch sensor with a touch region divided into sub-regions, featuring interdigitated first and second strip electrodes in one-dimensional arrays, reducing the number of capacitive detection channels needed by using the sum of first and second strip electrodes instead of intersection points, thereby decreasing the number of wires, detection channels, and controller pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional multi hover touch technology uses a large number of capacitive detection channels to achieve high touch recognition accuracy, then touch recognition accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The touch sensor is divided into multiple sub-regions, with each sub-region containing a set of interdigitated strip electrodes. This segmentation allows the touch detection function to be distributed across multiple independent sub-units, reducing the complexity of the overall system while maintaining comprehensive touch coverage and recognition accuracy.
Solution Approach 2:
Multiple first strip electrodes and multiple second strip electrodes are interdigitated within each sub-region to form an integrated electrode structure. This merging of multiple electrodes into a compact interdigitated arrangement reduces the total number of separate detection channels needed while preserving touch detection capabilities across the entire touch region.
2Measurement precision
If traditional multi hover touch technology uses a large number of capacitive detection channels to achieve high touch recognition accuracy, then touch recognition accuracy is improved, but manufacturing difficulty increases
Solution Approach 1:
By dividing the touch region into multiple sub-regions with standardized electrode patterns, the manufacturing process can be simplified through repetition of the same interdigitated electrode structure across different sub-regions, reducing manufacturing difficulty while maintaining comprehensive touch detection coverage.
Solution Approach 2:
The electrode configuration changes from a dense grid of individually addressed electrodes to a simplified interdigitated strip pattern where multiple electrodes share common connection lines. This parameter change in electrode arrangement significantly reduces manufacturing complexity while preserving touch detection accuracy.
3Measurement precision
If traditional multi hover touch technology uses a large number of capacitive detection channels, then touch recognition accuracy is improved, but the number of wires and controller pins increases
Solution Approach 1:
Multiple first strip electrodes are connected together through common connection lines, and multiple second strip electrodes are similarly combined. This merging of multiple electrode signals into shared connection paths dramatically reduces the number of wires and controller pins required while maintaining the ability to detect touches across all sub-regions with high accuracy.
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 maintains high touch recognition accuracy while significantly reducing manufacturing complexity and production costs by minimizing the number of capacitive detection channels and wires, facilitating easier design and fabrication.
Implementation Method 1
capacitive hover touch sensor
Data Source
AI summary
Disclosed is a capacitive hover touch sensor, a touch device adopting the capacitive hover touch sensor and an electronic equipment adopting the touch device. The capacitive hover touch sensor comprises an electrode pattern layer where a touch region is formed; the touch region is divided into P sub-regions, P being a natural number greater than 1; each of the sub-regions is provided with a plurality of first strip electrodes in a one-dimensional array and a plurality of second strip electrodes in a one-dimensional array; the plurality of first strip electrodes are interdigitated with the plurality of second strip electrodes; and the plurality of first strip electrodes and the plurality of second strip electrodes in each of the sub-regions are respectively connected to a touch controller by wires.