Touch Panel Redundant Signal Lines for Broken Line Yield
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Solution Overview
Problem
Existing touch screens face issues with broken touch signal lines during fabrication, leading to reduced touch accuracy and product yield due to their thinness.
Innovation Solution
Each touch electrode is electrically connected with at least two touch signal lines, and these signal lines are connected via a conductive wire, ensuring that even if one line breaks, the touch can still be detected, thereby increasing reliability and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If touch signal lines are made thin to prevent light shielding and visibility, then light transmission is improved, but the lines become prone to breaking during fabrication
Solution Approach 1:
The patent applies beforehand cushioning by creating redundant signal line connections before fabrication defects can occur. Each touch electrode is connected to multiple signal lines (at least two), and these parallel signal lines are interconnected via conductive wires at multiple points, establishing a backup pathway that cushions against the potential failure of any single line during fabrication or operation.
Solution Approach 2:
The patent changes the connectivity parameter from a single-line connection to a multi-line redundant connection. By modifying the electrical connection topology to include multiple signal lines and conductive wire interconnections per touch electrode, the system maintains thin signal lines for light transmission while achieving higher reliability through parameter-based redundancy.
2Shape
If touch signal lines are made thin to reduce visibility, then aesthetic appearance is improved, but touch accuracy decreases due to line breakage
Solution Approach 1:
The patent establishes redundant signal pathways beforehand to cushion against the risk of touch accuracy degradation. By connecting each touch electrode to multiple signal lines with conductive wire interconnections, the system ensures that if one thin signal line breaks, alternative pathways remain intact to maintain accurate touch detection.
Solution Approach 2:
The patent changes the connection topology parameter from single-line to multi-line redundancy, allowing the system to maintain thin, aesthetically pleasing signal lines while compensating for their fragility through increased connectivity redundancy, thereby preserving touch accuracy.
3Device complexity
If single signal line connection is used to simplify structure, then device complexity is reduced, but product yield decreases due to fabrication breakage
Solution Approach 1:
The patent applies beforehand cushioning by building in redundant signal line connections during the fabrication design phase. Each touch electrode connects to multiple signal lines with conductive wire interconnections, creating a fault-tolerant structure that cushions against fabrication defects and reduces product yield loss from broken signal lines.
Solution Approach 2:
The patent changes the connectivity parameter from 1:1 single-line connection to a many-to-many redundant connection structure, where each touch electrode connects to at least two signal lines that are interconnected via conductive wires. This parameter change increases structural complexity but dramatically improves product yield by preventing failures from propagating.
Data Source
AI summary
A touch panel including: a plurality of touch electrodes; and a plurality of touch signal lines electrically connected with the plurality of touch electrodes; wherein each of the plurality of touch electrodes is electrically connected with at least two of the touch signal lines, and the at least two touch signal lines electrically connected with the same touch electrode are electrically connected with each other via at least one conductive wire.