Touch Sensor Peripheral Traces for Narrow Bezel Signal Stability
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Solution Overview
Problem
The challenge is to design a touch sensor with a narrow bezel that meets both electrical specifications and aesthetic requirements, as existing touch panels struggle with signal stability due to the size of the bezel, which is influenced by the line width and spacing of peripheral circuits.
Innovation Solution
The touch sensor incorporates a substrate with a touch electrode layer and peripheral traces made of metal nanowires, where the line width and line spacing of the peripheral traces are specifically designed to be between 6 μm and 12 μm, allowing for a narrow bezel design while maintaining electrical functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the line width and line spacing of peripheral circuits are reduced to achieve narrow bezel, then the bezel size is reduced, but the signal transmission stability deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the line width and line spacing of peripheral traces within specific ranges (line width: 6-12 μm, line spacing: 6-12 μm) to achieve an optimal balance between bezel size reduction and signal transmission stability. This quantitative parameter optimization resolves the contradiction by finding the precise dimensional values that satisfy both narrow bezel requirements and electrical performance standards.
2Length of stationary object
If the peripheral circuit lines are made thinner to reduce bezel size, then the bezel width is reduced, but the risk of open or short circuits increases
Solution Approach 1:
The patent establishes specific parameter ranges for peripheral trace line width (6-12 μm) and line spacing (6-12 μm) that balance manufacturing feasibility with electrical reliability. These parameters are optimized to avoid both open circuits (from lines that are too thin) and short circuits (from lines that are too close), thereby resolving the manufacturing precision contradiction while achieving narrow bezel design.
Data Source
AI summary
A touch sensor having a visible area and a peripheral area at least on one side of the visible area includes a substrate, a touch electrode layer, and peripheral traces. The touch electrode layer is disposed on a surface of the substrate and includes touch electrodes corresponding to the visible area. The peripheral traces are disposed on the surface of the substrate and corresponding to the peripheral area. The peripheral traces are respectively electrically connected to the touch electrodes. Each of the peripheral traces includes a matrix and metal nanowires distributed in the matrix. A line width of each of the peripheral traces is more than or equal to 6 μm and less than or equal to 12 μm, and a line spacing of any adjacent peripheral traces of the peripheral traces is more than or equal to 6 μm and less than or equal to 12 μm.