Touch Element Conductive Channel Width Optimization
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Solution Overview
Problem
Current touch screens face challenges in increasing signal transmission speed without aggravating the Moire pattern issue, which is exacerbated by methods to reduce channel impedance, such as increasing metal wire density or thickness, and these approaches also increase manufacturing costs and complexity.
Innovation Solution
A touch element comprising a first conductive pattern layer with a basic and incremental pattern, and a second conductive pattern layer stacked and insulated, where the orthographic projection of the incremental pattern on the second layer coincides with its pattern, effectively increasing the channel width without increasing Moire Pattern, thereby reducing channel impedance and improving electrical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If metal wire density or thickness is increased to reduce channel impedance, then signal transmission speed is improved, but Moire pattern is aggravated
Solution Approach 1:
The patent introduces incremental patterns that extend in the depth dimension (stacked layers) rather than only in the planar dimension. By stacking conductive patterns in multiple layers with incremental positioning, the effective channel width is increased without increasing planar wire density, thus improving signal transmission speed while avoiding Moire pattern generation.
Solution Approach 2:
The patent embeds incremental patterns within the stacked conductive pattern structure. The incremental patterns are positioned within the projection area of the main conductive patterns in overlapping layers, creating a nested configuration that increases effective conductivity without increasing the overall footprint or planar density.
2Speed
If metal wire density or thickness is increased to reduce channel impedance, then signal transmission speed is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent divides the conductive pattern into multiple stacked layers, each containing basic patterns and incremental patterns. This segmentation allows the complex function of high-speed signal transmission to be achieved through multiple simpler layers rather than requiring a single complex high-density layer, thereby reducing manufacturing complexity while improving performance.
3Speed
If metal wire density or thickness is increased to reduce channel impedance, then signal transmission speed is improved, but manufacturing cost increases
Solution Approach 1:
By transitioning from planar wire density increase to vertical stacking with incremental patterns, the patent achieves improved signal transmission speed without proportionally increasing material consumption. The incremental patterns utilize the depth dimension to increase effective channel width while maintaining efficient material utilization.
Data Source
AI summary
A touch element, a touch substrate, a display device, and a method of manufacturing the touch substrate are disclosed. The touch element includes a first conductive pattern layer. The first conductive pattern layer includes a first conductive pattern. The first conductive pattern includes a first basic pattern and a first incremental pattern. The touch element further includes a second conductive pattern layer. The second conductive pattern layer is stacked with and insulated from the first conductive pattern layer. An orthographic projection of the first incremental pattern on the second conductive pattern layer coincides with a pattern of the second conductive pattern layer.