Touch Panel Electrode Segmentation for Stylus Detection Accuracy
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Solution Overview
Problem
Current touch panels have insufficient detection accuracy due to the limited number of touch wires leading from the touch electrodes, which restricts the precision and linearity required for active styluses.
Innovation Solution
A touch panel design featuring a substrate with intersecting touch electrodes, multiple touch wires connecting each electrode to detection channels, and auxiliary electrodes around main electrodes to enhance detection accuracy and linearity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only one horizontal touch wire and one vertical touch wire are led from the plurality of touch electrodes in each unit area, then the device complexity is reduced, but the detection accuracy is insufficient
Solution Approach 1:
The touch electrode array is segmented into multiple groups, with each group connected to separate touch wires. Instead of collecting all electrode signals through a single wire, the patent divides the electrodes into first and second groups, connecting them through different touch wires that eventually merge at the detection channel. This segmentation allows individual electrode detection while managing wire complexity through systematic grouping and merging strategies.
2Measurement precision
If multiple touch wires are led from each touch electrode to enable individual detection, then the detection accuracy is improved, but the device complexity increases
Solution Approach 1:
Multiple touch wires from different electrode groups are merged into shared detection channels. The patent describes how first and second touch wires, each carrying signals from different electrode groups, are connected to the same detection channel. This merging reduces the total number of detection channels needed while still enabling individual electrode detection through time-division or signal separation techniques.
Solution Approach 2:
Detection channels are designed to handle multiple touch wire inputs universally. The same detection channel can process signals from multiple different touch wires and electrode groups, making the detection system multi-functional. This universality allows the system to detect individual electrodes through shared channels rather than requiring dedicated channels for each electrode.
3Manufacturing precision
If only overall detection is conducted to the plurality of touch electrodes in each unit area, then the device complexity is reduced, but the linearity is insufficient
Solution Approach 1:
The touch electrode array is segmented into multiple groups, with each group connected to separate touch wires. Instead of collecting all electrode signals through a single wire, the patent divides the electrodes into first and second groups, connecting them through different touch wires that eventually merge at the detection channel. This segmentation allows individual electrode detection while managing wire complexity through systematic grouping and merging strategies.
Data Source
AI summary
A touch panel and a touch device with the touch panel are provided. Each of plurality of touch electrodes of a substrate of the touch panel is led by a corresponding one of plurality of touch wires, and each row and each column of the plurality of touch electrodes share one detection channel through a corresponding one of the plurality of touch wires, and can detect a touch signal sensed by each of the plurality of touch electrodes, thereby increasing an area of the touch panel that can detect the touch signal, and enhancing a detection accuracy and a linearity of the touch panel.