Touch Screen Panel Coupling Patterns Static Electricity
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Solution Overview
Problem
Electrostatic capacity type touch screen panels are vulnerable to static electricity and suffer from deteriorated adhesion with insulating films, affecting contact stability and material costs.
Innovation Solution
The touch screen panel features coupling patterns on a transparent substrate with contact holes in an insulating film, allowing first and second sensing patterns to be electrically coupled, using metal patterns with lower specific resistance and indium tin oxide (ITO) for improved strength against static electricity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupling patterns are positioned on the insulating film, then the sensing patterns can be coupled, but the sensing patterns become vulnerable to static electricity and adhesion with the insulating film deteriorates
Solution Approach 1:
The patent inverts the conventional layer arrangement by positioning the coupling patterns on the transparent substrate (bottom layer) and the sensing patterns on the insulating film (top layer). This inversion allows the coupling patterns to serve as a stable foundation that is less vulnerable to static electricity, while the insulating film provides protection for the sensing patterns above.
Solution Approach 2:
The insulating film acts as an intermediary layer between the coupling patterns and the sensing patterns. It provides electrical insulation to prevent static electricity interference while maintaining mechanical adhesion, thus resolving the contradiction between coupling stability and static electricity vulnerability.
2Reliability
If coupling patterns are positioned on the insulating film, then the sensing patterns can be coupled, but adhesion with the insulating film deteriorates
Solution Approach 1:
By inverting the layer arrangement and positioning coupling patterns on the substrate rather than on the insulating film, the patent eliminates the adhesion problem between coupling patterns and insulating film. The sensing patterns maintain necessary adhesion to the insulating film while the coupling patterns form a stable base layer.
3Reliability
If multiple layers and patterns are added to improve coupling stability, then reliability improves, but material costs increase
Solution Approach 1:
The transparent substrate serves multiple functions: it provides mechanical support for the coupling patterns, acts as a base layer for the overall structure, and maintains optical transparency. This multi-functionality reduces the need for additional separate components, thereby controlling material costs while improving coupling stability.
Data Source
AI summary
The touch screen panel according to the embodiment of the present invention includes a plurality of coupling patterns arranged on a transparent substrate in an island shape, an insulating film formed on the coupling patterns and having contact holes arranged corresponding to end portions of the coupling patterns, and first and second sensing patterns formed on the insulating film. The second sensing pattern includes second sensing cells, and each of the second sensing cells are formed in a region of the insulating film having a pair of adjacent contact holes to be electrically coupled to coupling patterns exposed through the contact holes.