Capacitive Touch Screen Panel with Prominences for Static Discharge
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Solution Overview
Problem
Capacitive touch screen panels are susceptible to damage from static electricity, leading to malfunction due to dielectric breakdown at the intersections of sensing patterns.
Innovation Solution
The touch screen panel design includes sensing cells with prominences extending towards adjacent cells, which facilitate the discharge of static electricity, reducing the risk of dielectric breakdown by maintaining an isoelectric state between adjacent sensing cells, and optionally using dummy patterns and guard rings to enhance static discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first and second connection patterns are made with narrow width to reduce material usage and maintain thin insulator thickness, then the manufacturing process remains feasible and the device structure remains compact, but the resistance of the connection patterns becomes large and the intersections become susceptible to static electricity damage
Solution Approach 1:
The patent applies preliminary action by forming prominences at the intersections of connection patterns before final assembly. These prominences pre-establish discharge paths for static electricity, preventing dielectric breakdown before it can occur. The prominences are created as protruding structures that extend beyond the insulator thickness, providing a preferential path for static charge dissipation.
Solution Approach 2:
The patent converts the harmful effect of static electricity into a beneficial discharge mechanism. Instead of trying to completely prevent static charge accumulation, the design allows controlled discharge through the prominences, which act as intentional weak points that safely dissipate static energy before it can damage the thin insulator layers or cause dielectric breakdown.
2Volume of moving object
If the insulator thickness is reduced to maintain compact device structure and follow manufacturing limits, then the device becomes more compact and manufacturing remains feasible, but the intersection between first and second connection patterns becomes easily damaged by static electricity
Solution Approach 1:
The prominences are formed in advance at critical intersection points, creating a protective feature before the device is put into service. This preliminary structuring ensures that when static electricity occurs, the discharge path is already established through the prominences rather than through the thin insulator layers.
Solution Approach 2:
The patent applies local quality by adding prominences only at specific intersection points where static electricity damage is most likely to occur, rather than uniformly thickening the insulator throughout the entire device. This localized approach maintains overall device compactness while providing enhanced protection at critical vulnerability points.
3Productivity
If the connection patterns are designed with standard geometry to simplify manufacturing, then the manufacturing process is simpler and production is faster, but the intersections are more susceptible to dielectric breakdown from static electricity
Solution Approach 1:
The prominences are incorporated into the manufacturing process as a preliminary step, formed during the patterning stage before final assembly. This approach integrates the protective feature into the existing manufacturing workflow without requiring separate complex processing steps, thereby maintaining high productivity while enhancing reliability.
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 design effectively prevents damage from static electricity, ensuring the capacitive touch screen panel operates reliably by inducing static electricity discharge through the prominences and dummy patterns, thereby preventing dielectric breakdown and malfunctions.
Implementation Method 1
the sensing cells include prominences extending toward adjacent ones of the sensing cells of the sensing cells... facilitate the discharge of static electricity... inducing static electricity discharge through the prominences
Data Source
AI summary
A touch screen panel that that is less susceptible to malfunction by static electricity. The touch screen panel includes: a transparent substrate; sensing cells formed on the transparent substrate, comprising: first sensing cells connected in a first direction; and second sensing cells connected in a second direction intersecting with the first direction; and connecting patterns formed on the transparent substrate, comprising: first connecting patterns connecting the first sensing cells in the first direction, and second connecting patterns connecting the second sensing cells in the second direction; wherein the sensing cells include prominences extending toward adjacent ones of the sensing cells.