Touch Sensor Mesh Electrode Layering for Reduced Parasitic Capacitance
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Solution Overview
Problem
Conventional touch sensors face issues with bridge electrode visibility, parasitic capacitance noise, electrode channel resistance, and transmittance due to the formation of driving and sensing electrodes on different layers, leading to reduced visibility and increased thickness of the insulating layer.
Innovation Solution
A touch sensor design featuring a first and second mesh electrode layer with intersecting points on different layers, an insulating layer with contact holes for electrical connection, and a mesh-shaped pattern to minimize parasitic capacitance and channel resistance, while maintaining high transmittance and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If driving electrode and sensing electrode are formed on different layers to minimize parasitic capacitance noise, then parasitic capacitance noise is reduced, but insulating layer thickness is increased
Solution Approach 1:
The patent separates driving and sensing electrodes into different layers (vertical dimension) to reduce parasitic capacitance, while the insulating layer thickness is optimized to the minimum required value to maintain electrical isolation, balancing noise reduction with thickness control
Data Source
AI summary
The present disclosure relates to a touch sensor including: a first mesh electrode layer including: first unit patterns and a first intersecting point; a second mesh electrode layer including: second unit patterns and a second intersecting point; and an insulating layer positioned between the first mesh electrode layer and the second mesh electrode layer and provided with a contact hole, in which at least one of the first unit patterns includes: the second intersecting point in a planar direction, and at least one of the second unit patterns includes: the first intersecting point in the planar direction, and an image display device including the same.