Touch Screen Panel Island Bridge Patterns Reduce Resistance
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Solution Overview
Problem
Existing touch screen panels face challenges in reducing resistance and visibility while maintaining transparency, particularly in capacitive type panels where bridge patterns can be visible and affect pixel coverage.
Innovation Solution
The implementation of first and second sensing patterns formed on a substrate or display panel with island and bridge patterns made of transparent and metal materials respectively, where the island patterns are separated and the bridge patterns are designed to reduce resistance and visibility by being positioned on the same layer and configured to connect sensing cells in different directions, with twisted bridge patterns to minimize visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bridge patterns are used to connect sensing cells, then electrical connection is improved, but visibility of patterns increases and transparency decreases
Solution Approach 1:
The bridge patterns are segmented into multiple separate patterns rather than continuous lines. This segmentation reduces the total area of opaque material while maintaining electrical connectivity through multiple discrete connection points, thereby improving transparency without sacrificing electrical connection reliability.
Solution Approach 2:
The bridge patterns are positioned at intersections of first and second sensing patterns, utilizing the dimensional arrangement of crossed patterns. This strategic positioning allows the bridge patterns to connect sensing cells while minimizing their visual impact by distributing them across the intersection points rather than creating continuous visible lines.
2Reliability
If bridge patterns are made of metal material, then electrical conductivity is improved, but visibility and resistance to static electricity worsen
Solution Approach 1:
The metal bridge patterns are divided into multiple separate segments rather than continuous structures. This segmentation reduces the total metal area exposed to static electricity while maintaining adequate electrical conductivity through multiple connection paths, thereby mitigating static electricity damage risk.
Solution Approach 2:
The metal bridge patterns are designed with partial metal coverage rather than complete continuous coverage. This partial action approach provides sufficient electrical conductivity for normal operation while reducing the overall metal content that could attract or accumulate static electricity charges.
3Illumination intensity
If island patterns are separated in second sensing patterns, then transparency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The island patterns are formed simultaneously with the second sensing patterns in the same patterning process, merging two patterning operations into one. This merging approach ensures precise relative positioning between island patterns and second sensing patterns while maintaining the transparency benefits of separated island structures.
Data Source
AI summary
A touch screen panel includes a substrate, first sensing patterns formed in a first direction on the substrate, and second sensing patterns formed in a second direction intersected with the first direction on the substrate. The first sensing patterns include first sensing cells formed in an independent shape, respectively, between the second sensing patterns, and first connection patterns, the first connection patterns including a plurality of island patterns and a plurality of bridge patterns, the island patterns being separated and patterned in island shape in the second sensing patterns, the plurality of bridge patterns connecting between the first sensing cells and the island patterns or connecting between two adjacent island patterns, the first connection patterns connecting to the first sensing cells in the first direction.