Touch Screen Panel Conductive Auxiliary Patterns Static Electricity
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Solution Overview
Problem
Conventional capacitive touch screen panels are prone to driving failure due to static electricity, which causes disconnection defects in the connection patterns, leading to malfunction.
Innovation Solution
Incorporating conductive auxiliary patterns on the second connection patterns that intersect an insulating layer, these patterns are positioned at the start and end portions where the second connection patterns cross over the insulating layer, effectively diffusing static electricity and preventing disconnection defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If second connection patterns cross over the insulating layer to connect second sensing cells, then electrical connectivity is achieved, but static electricity causes disconnection defects and driving failure
Solution Approach 1:
A ground electrode layer is introduced as an intermediary between the second connection patterns and the substrate. This ground electrode layer acts as a mediator that receives and dissipates static electricity away from the vulnerable second connection patterns, preventing disconnection defects while maintaining electrical connectivity
2Reliability
If connection patterns are made wider to reduce resistance, then electrical conductivity improves, but the area occupied increases and may interfere with sensing cells
Solution Approach 1:
The ground electrode layer is positioned in a different spatial dimension (below the insulating layer) rather than expanding the connection patterns horizontally. This vertical dimensionality change allows static electricity dissipation without increasing the horizontal area occupied by connection patterns, maintaining both conductivity and sensing cell spacing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The conductive auxiliary patterns successfully prevent disconnection defects caused by static electricity, thereby ensuring the reliability and functionality of the touch screen panel by diffusing induced static electricity and reducing Joule heating.
Implementation Method 1
a plurality of conductive auxiliary patterns on the second connection patterns and electrically connected to the second connection patterns
Implementation Method 2
an insulating layer between the first and second connection patterns, the second connection patterns crossing over the insulating layer
Data Source
AI summary
A touch screen panel includes a transparent substrate, a plurality of first sensing cells on the transparent substrate, the first sensing cells being connected to each other along a first direction, a plurality of second sensing cells between the first sensing cells and insulated from the first sensing cells, the second sensing cells being connected to each other along a second direction, a plurality of first connection patterns connecting the first sensing cells along the first direction, a plurality of second connection patterns connecting the second sensing cells along the second direction, the second connection patterns intersecting the first connection patterns, an insulating layer between the first and second connection patterns, the second connection patterns crossing over the insulating layer, and a plurality of conductive auxiliary patterns on the second connection patterns and electrically connected to the second connection patterns.