Touch Electrode Mesh Pattern Capacitance Reduction
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Solution Overview
Problem
Touch apparatuses with high capacitance values between interlacing touch electrodes hinder operation in stylus mode due to high electrical resistance and visual inconduciveness of transparent sensing patterns.
Innovation Solution
Designing touch electrodes with specific mesh patterns and openings that form interlacing points and openings within a defined range, reducing capacitance while maintaining appropriate electrical resistance, allowing for effective stylus mode operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent sensing patterns are used for touch electrodes, then visual effects are improved, but electrical resistance increases making operation inconducive
Solution Approach 1:
The touch electrodes are divided into mesh patterns with discrete conductive lines and openings, allowing light to pass through while maintaining electrical conductivity through the distributed conductive network
Solution Approach 2:
Different regions of the touch electrode have different properties: solid portions provide electrical conductivity while opening portions allow light transmission, creating local variations that resolve the contradiction between visual effects and electrical properties
2Reliability
If mesh patterns with low electrical resistance material are used, then electrical properties are improved, but capacitance value in interlacing region increases hindering stylus mode operation
Solution Approach 1:
The continuous mesh pattern is segmented by introducing openings that break up the conductive lines, reducing the capacitance value in interlacing regions while maintaining overall electrical connectivity through the distributed network
Solution Approach 2:
The touch electrode structure incorporates openings creating a porous-like configuration that reduces capacitance between interlacing electrodes while preserving electrical conductivity through the remaining conductive material
3Ease of operation
If openings are added to reduce capacitance, then stylus mode operation is improved, but electrical resistance may increase
Solution Approach 1:
Openings are strategically placed at specific densities rather than uniformly distributed, providing sufficient capacitance reduction for stylus mode while maintaining adequate electrical conductivity through the remaining conductive network
Solution Approach 2:
The size, shape, and distribution of openings are optimized to achieve the right balance between capacitance reduction and electrical resistance maintenance, with parameters tuned to specific ranges
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 reduces capacitance and maintains suitable electrical resistance, enabling smooth operation in stylus mode and enhancing visual aesthetics by optimizing the arrangement of conductive lines and openings.
Implementation Method 1
a capacitance value between the first and second touch electrodes is high
Data Source
AI summary
A touch apparatus including a first touch electrode and a second touch electrode is provided. The first touch electrode has first conductive lines constituting a mesh pattern. The second touch electrode has second conductive lines constituting a mesh pattern. The first touch electrode crosses over the second touch electrode to form an interlacing region of the first touch electrode and the second touch electrode. The first conductive lines of the first touch electrode and the second conductive lines of the second touch electrode form M interlacing points within the interlacing region. The first conductive lines of the first touch electrode have N openings within the interlacing region. M and N are positive integers and satisfy:5%≤(NM+N)×100%≤50%.