Touch Sensor Noise Cancellation via Integrated Connection Patterns
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Solution Overview
Problem
Current touch sensors for display devices face challenges in achieving improved sensitivity and reliability due to noise interference and manufacturing complexity, particularly in the design of conductive patterns and connection structures.
Innovation Solution
The touch sensor design incorporates a base layer with first and second touch electrode members, conductive patterns, and connection patterns made from different conductive layers, with specific arrangements and openings to enhance sensitivity and reduce noise interference, while simplifying the manufacturing process by forming components together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive patterns are designed with complex connection structures to improve electrical connection reliability, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the connection pattern and contact electrode into a single integrated structure. The connection pattern is formed in the same conductive layer as the contact electrode, eliminating the need for separate connection structures and reducing overall device complexity while maintaining electrical connection reliability.
Solution Approach 2:
The connection pattern serves multiple functions: it provides electrical connection between conductive patterns, acts as a contact electrode for signal transmission, and provides structural support. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure.
2Object-affected harmful factors
If multiple conductive layers are used to reduce noise interference, then noise resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent converts the potential harm of noise interference into a beneficial shielding effect. By strategically placing conductive patterns and connection patterns in specific conductive layers, they create electromagnetic shielding that protects sensitive sensing areas from noise while maintaining the transparency needed for touch sensing.
Solution Approach 2:
The patent uses vertical layering (adding the dimension of depth) to solve the noise problem. Instead of complicating the in-plane pattern design, it distributes conductive elements across multiple conductive layers at different vertical positions, creating noise cancellation and shielding effects through the third dimension.
3Reliability
If contact electrode area is increased to improve signal strength, then signal strength is improved, but transparency is reduced
Solution Approach 1:
The contact electrode is segmented into multiple smaller conductive patterns arranged in an array. This segmentation allows the total conductive area to be distributed across multiple small elements rather than one large element, maintaining signal strength through cumulative effect while preserving transparency by reducing the continuous opaque area.
Solution Approach 2:
The patent applies different properties to different regions: the conductive patterns have high conductivity for signal transmission, while the spaces between them maintain transparency. The connection pattern is designed with optimal thickness and material composition to provide necessary electrical connection while minimizing optical interference.
Data Source
AI summary
A touch sensor including a base layer, a first touch electrode member including first touch electrodes disposed on the base layer, arranged along a first direction, electrically connected to each other, and each including a first opening, a second touch electrode member including second touch electrodes disposed on the base layer, arranged along a second direction, and electrically connected to each other, a conductive member including conductive patterns electrically connected to each other along the first direction and respectively disposed in the first openings, a contact electrode connected to one end of the first touch electrode member and including lower and upper contact electrodes, and a connection pattern connected to an outermost first conductive pattern, the connection pattern including the same conductive layer as the upper contact electrode, in which the upper contact electrode includes an electrode opening, and a portion of the connection pattern is disposed therein.