Touch Electrode Matrix Design for Position Detection
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Solution Overview
Problem
Existing touch panels and display devices have limitations in detecting touch position precision, as the detection accuracy is not sufficiently high.
Innovation Solution
A touch panel configuration with a matrix arrangement of touch electrodes, where each touch electrode has a length 1.5 times or longer than the distance to adjacent electrodes, enhancing detection precision by increasing the number of electrodes within a given area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of touch electrodes is increased to improve detection precision, then the detection precision of touch position is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The touch electrode is divided into multiple independent sensing regions (first sensing region, second sensing region, third sensing region, fourth sensing region) arranged in a matrix pattern. Each sensing region functions as an independent detection unit, allowing the system to achieve high detection precision through multiple discrete measurement points rather than a single complex electrode structure.
Solution Approach 2:
Multiple sensing regions are combined within a single touch electrode structure, where each sensing region detects touch events in its specific area. The signals from all sensing regions are integrated to provide comprehensive touch position detection across the entire electrode, merging multiple simple detection functions into one composite sensing element.
2Measurement precision
If the touch electrode length is increased to 1.5 times the distance between adjacent electrodes, then the detection precision is improved, but the area occupied by each electrode increases
Solution Approach 1:
The touch electrode utilizes a two-dimensional matrix arrangement with sensing regions distributed across both horizontal and vertical dimensions. By extending the electrode length to 1.5 times the inter-electrode distance in both directions, the design creates overlapping sensing zones that enhance detection precision through multi-dimensional coverage rather than simply increasing linear dimensions in one direction.
Solution Approach 2:
Multiple sensing regions are nested within the extended electrode structure, with each sensing region positioned to detect specific portions of the touch surface. The nested arrangement of four sensing regions within one electrode allows comprehensive coverage while maintaining efficient space utilization through hierarchical organization of sensing elements.
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 proposed configuration significantly improves touch position detection accuracy by increasing the number of touch electrodes within a specific area, reducing errors between actual and detected touch positions.
Implementation Method 1
a touch panel that detects a touch position by a user by detecting a change in capacitance
Data Source
AI summary
A touch panel includes a plurality of touch electrodes arranged in a matrix shape in a first direction and a second direction intersecting the first direction, wherein the touch electrode has a length 1.5 times or longer than a distance between the touch electrode and another touch electrode adjacent to the touch electrode in the first direction or the second direction, and wherein the length is a length of the touch electrode in a direction intersecting the first direction and the second direction.