Capacitive Touch Screen Insulation Protrusions Prevent Short Circuits
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Solution Overview
Problem
Capacitive touch screen panels face short-circuit issues due to undesired conductive particles accumulating on step differences between electrode patterns, leading to electrical shorts.
Innovation Solution
The design incorporates insulation patterns with protrusion parts between electrode patterns, featuring non-overlapping regions and angled sides to prevent continuous conductive particle paths, thereby ensuring electrical insulation and preventing shorts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulation patterns are formed on bridges at intersections of electrode patterns, then electrical insulation between first and second electrode patterns is achieved, but step differences are created that cause conductive particles to accumulate and create short circuits
Solution Approach 1:
The insulation pattern is extended from a two-dimensional planar structure to a three-dimensional structure by forming a protrusion part that rises from the bridge surface. This vertical extension creates an additional dimensional barrier that prevents conductive particles from bridging between electrode patterns, solving the short circuit problem while maintaining electrical insulation.
Solution Approach 2:
The protrusion part is formed in advance on the bridge before the electrode patterns are deposited. This preliminary structural preparation ensures that when conductive particles are generated during subsequent manufacturing processes, they cannot accumulate in a continuous path between electrodes, preventing short circuits before they can occur.
2Area of stationary object
If the distance between first and second electrode patterns is reduced, then the touch screen panel size is minimized, but the risk of short circuits due to conductive particles increases
Solution Approach 1:
Instead of increasing the horizontal distance between electrode patterns (which would increase panel size), the solution adds vertical dimension through the protrusion part. This creates a three-dimensional insulation barrier that prevents particle accumulation without increasing the planar footprint of the device.
Solution Approach 2:
The protrusion part is localized only at the critical intersection areas where first and second electrode patterns meet on bridges. This localized structural modification provides enhanced insulation precisely where short circuits are most likely to occur, without affecting the overall compact design of the touch screen panel.
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
This configuration effectively increases the path length of step differences, preventing short circuits between first and second electrode patterns and ensuring reliable operation by hindering the continuity of undesired conductive particles.
Implementation Method 1
a plurality of insulation patterns formed at intersections of the first electrode patterns and the second electrode patterns and electrically insulating the first electrode patterns from the second electrode patterns
Data Source
AI summary
A capacitive touch screen panel includes according to an embodiment a substrate, a plurality of first electrode serials arranged in a first direction on the substrate, a plurality of second electrode serials arranged in a second direction to intersect the first electrode serials, and a plurality of insulation patterns formed at intersections of the first electrode serials and the second electrode serials and electrically insulating the first electrode serials from the second electrode serials. Each of the plurality of first electrode serials includes a plurality of first electrode patterns which are separated from each other, and first connection patterns which are formed under the insulation patterns and electrically connect the neighboring first electrode patterns to each other. In addition, each of the plurality of insulation patterns has a protrusion part formed between the first electrode patterns and the second electrode patterns.