Touch Sensor Electrode Layout for Higher Sensitivity and Lower Noise
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Solution Overview
Problem
Touch sensors experience issues with touch sensing sensitivity and noise generation during operation, particularly when not held by hands, leading to signal loss or split detection at multiple points.
Innovation Solution
A touch sensor design featuring driving electrodes with openings and reception electrodes with alternating patterns and connection patterns on different layers, allowing for improved signal processing to enhance sensitivity and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If driving electrode and reception electrode are implemented as single layer or double layer, then device complexity is reduced, but touch sensing sensitivity deteriorates and noise is generated
Solution Approach 1:
The reception electrode is segmented into multiple reception electrode patterns arranged in different directions (first direction and second direction). This segmentation allows the touch sensor to detect touch inputs more accurately by capturing signal variations from multiple orientations, thereby improving touch sensing sensitivity while maintaining a relatively simple layered structure.
Solution Approach 2:
The invention introduces directional dimensionality by arranging reception electrode patterns in multiple directions (first direction and second direction). This multi-directional arrangement enables the sensor to detect touch inputs from various angles and improves sensitivity without significantly increasing structural complexity, as the patterns are integrated within the existing electrode layers.
2Ease of manufacture
If driving electrode and reception electrode are implemented as single layer or double layer, then manufacturing is simplified, but noise generation increases during touch sensing
Solution Approach 1:
The reception electrode is divided into multiple reception electrode patterns with different orientations. This segmentation enables the system to differentiate between actual touch signals and noise by analyzing signal consistency across different directional patterns, thereby reducing noise generation while maintaining ease of manufacture through standard electrode fabrication processes.
Solution Approach 2:
Different reception electrode patterns are arranged in different directions to have specialized detection capabilities. The first direction patterns detect signals along one axis while the second direction patterns detect signals along another axis, allowing the system to identify and filter out noise that does not conform to expected directional signal patterns.
3Measurement precision
If reception electrode patterns are arranged in multiple directions, then touch sensing sensitivity is improved, but device complexity increases
Solution Approach 1:
The reception electrode is segmented into discrete patterns arranged in two primary directions. This segmentation achieves improved touch sensing sensitivity by capturing multi-directional signal variations while controlling device complexity through a systematic and regular arrangement of patterns that can be manufactured using standard processes.
Solution Approach 2:
The reception electrode patterns serve multiple functions: they detect touch inputs in the first direction, detect touch inputs in the second direction, and collectively provide noise filtering capability. This multi-functionality improves touch sensing sensitivity without proportionally increasing device complexity, as the same structural elements perform multiple detection roles.
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 design improves touch sensing sensitivity and effectively removes noise, such as low ground mass and display noise, enhancing the overall performance of touch input devices.
Implementation Method 1
A user may input information by pressing or touching the touch sensor while seeing an image displayed on a screen of the display device
Implementation Method 2
a plurality of driving electrodes each having a shape extending in a first direction and having a plurality of openings arranged along the first direction; and a plurality of reception electrodes including a plurality of reception electrode patterns arranged in the plurality of openings of the plurality of driving electrodes
Data Source
AI summary
An embodiment of the present invention relates to a touch sensor and a touch input device comprising same. The touch sensor according to the embodiment of the present invention comprises: a plurality of driving electrodes each having a shape extending in a first direction and having a plurality of openings arranged along the first direction; and a plurality of reception electrodes comprising a plurality of reception electrode patterns arranged in the plurality of openings of the plurality of driving electrodes, and a plurality of connection patterns which are arranged along a second direction different from the first direction and electrically connect the plurality of reception electrode patterns.