Touch Device Conducting Lines ESD Protection
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Solution Overview
Problem
Conventional touch devices suffer from electrostatic discharge (ESD) issues due to the accumulation of static charges, which can damage the device and degrade its performance.
Innovation Solution
The design features conducting lines with varying widths and spacings in different regions, including a curve region with increased width and spacing, and arc-shaped terminals to reduce charge density and prevent ESD. The conducting lines in the curve region have a greater width and spacing compared to non-curve regions, and the terminals are arc-shaped rather than rectangular to minimize charge accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conducting lines have uniform width and fixed spacing in all regions, then manufacturing is simple and device complexity is low, but static charge accumulates leading to ESD damage
Solution Approach 1:
The patent applies local quality by varying the width and spacing of conducting lines in different regions. Specifically, the conducting lines have different widths in the first region (narrower width) compared to the second region (wider width), and similarly different spacings. This localized variation in geometric parameters reduces charge density in critical areas while maintaining simpler structures in other areas, thereby preventing ESD without requiring complete redesign of all conducting lines.
Solution Approach 2:
The patent segments the conducting line structure into multiple regions with different geometric characteristics. The first region has conducting lines with a first width and first spacing, while the second region has conducting lines with a second width and second spacing. This segmentation allows each region to be optimized independently for its specific function, balancing ESD protection with manufacturing simplicity.
2Reliability
If conducting lines have uniform width, then manufacturing precision requirements are low, but charge density increases causing ESD
Solution Approach 1:
The patent implements local quality by assigning different width specifications to different regions. The first region has a first width that is different from the second width of the second region. This allows the patent to balance manufacturing precision requirements with charge dissipation needs, making ESD protection achievable without uniformly high precision requirements across the entire structure.
3Reliability
If adjacent conducting lines have fixed space, then device layout is simple, but electrostatic discharge risk increases
Solution Approach 1:
The patent applies local quality to spacing by defining a first spacing between adjacent conducting lines in the first region and a second spacing in the second region, where the spacings are different. This localized spacing variation prevents charge accumulation and reduces ESD risk in critical areas while maintaining simpler, more uniform spacing in other regions, thus balancing ESD prevention with layout simplicity.
Data Source
AI summary
A touch device including a substrate and a touch-sensing electrode layer thereon is provided. The touch-sensing electrode layer includes a sensing electrode in a touch-sensing region, a first conducting line in a non-touch-sensing region and a second conducting line in the non-touch-sensing region, wherein the second conducting line is disposed between the touch-sensing region and the first conducting line. The first conducting line and the second conducting line are respectively electrically connected to the sensing electrodes. The non-touch-sensing region is located outside of the touch-sensing region, and the non-touch-sensing region includes a third region connecting a first region and a second region. The first conducting line has a first width in the third region, the second conducting line has a second width in the third region, and the first width is greater than the second width.