Touch Sensor Masked Electrode Layout for Sensitivity Consistency
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Solution Overview
Problem
Existing touch sensors vary in sensitivity due to differences in electrode size and trace length, leading to inconsistent performance across sensors.
Innovation Solution
A touch sensor design featuring two electroconductive patterns where one pattern masks a portion of the other, ensuring unmasked portions of electrodes are of approximately equal length, thereby standardizing sensitivity levels across sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different sensor designs are used to meet varying application requirements, then adaptability is improved, but sensitivity consistency deteriorates
Solution Approach 1:
The patent applies parameter changes by systematically varying electrode dimensions (width, length, area) and trace characteristics (length, width, routing) to create different sensor designs that maintain consistent sensitivity. By controlling these geometric parameters during layout generation, the system can adapt sensors to different applications while ensuring uniform sensitivity performance across all variants.
Solution Approach 2:
The patent employs local quality by applying different electroconductive pattern configurations to specific regions of the sensor array. Each sensor region can have customized electrode and trace layouts tailored to local application requirements, while the overall sensitivity is standardized through controlled parameter variations in these local patterns.
2Reliability
If electrode size and trace length are varied to optimize individual sensor performance, then sensitivity is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent systematically manages parameter changes by defining specific ranges and relationships for electrode dimensions and trace characteristics. Rather than arbitrary variations, parameters are changed according to controlled rules that maintain manufacturing feasibility while achieving desired sensitivity levels. This structured approach allows optimization without sacrificing manufacturing precision.
Solution Approach 2:
The patent segments the sensor array into multiple independent sensor elements, each with its own electroconductive patterns. This segmentation allows individual optimization of each sensor's electrode and trace parameters while maintaining overall array consistency. Each segment can be manufactured independently with standard precision requirements, avoiding the need for ultra-precise manufacturing across the entire array.
3Reliability
If complex electroconductive patterns are used to achieve uniform sensitivity, then sensitivity consistency is improved, but device complexity increases
Solution Approach 1:
The patent divides the sensor array into multiple discrete sensor elements with simplified individual patterns. Rather than using one complex pattern for the entire array, each sensor element has its own straightforward electroconductive layout, reducing the complexity of individual manufacturing steps while achieving uniform sensitivity across the complete array through systematic pattern replication.
Solution Approach 2:
The patent employs universal electroconductive pattern designs that can be replicated across multiple sensor elements. By creating a standardized pattern template that works for all sensors in the array, the system achieves uniform sensitivity without requiring complex unique patterns for each sensor. This multi-functional pattern approach simplifies manufacturing while maintaining performance consistency.
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 design reduces variations in sensitivity among capacitive sensors, ensuring that sensors have similar sensitivity levels, improving consistency and performance.
Implementation Method 1
a second electroconductive pattern (512) configured to mask a portion of the first electroconductive pattern (502) when positioned over or under the first electroconductive pattern (502)
Data Source
AI summary
In accordance with at least one embodiment, a touch sensor is disclosed. The touch sensor includes a first electroconductive pattern including at least two electrodes. The touch sensor further includes a second electroconductive pattern configured to mask a portion of the first electroconductive pattern when positioned over or under the first electroconductive pattern. The second electroconductive pattern masks the portion of the first electroconductive pattern such that an unmasked portion of the first electroconductive pattern includes unmasked portions of the at least two electrodes. The unmasked portions are of approximately equal length.