Touch Screen Panel Static Electricity Induction Patterns
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Solution Overview
Problem
Capacitive touch screen panels are prone to driving failure due to insulation breakdown or disconnection caused by static electricity at the intersection portions of connection patterns, which compromises their functionality.
Innovation Solution
Incorporating static electricity induction patterns made of low-resistance opaque metallic material, connected to sensing cells and extending towards adjacent cells, to effectively dissipate static electricity and prevent damage to the connection patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection patterns are made narrower to reduce overlap and improve insulation, then insulation performance is improved, but resistance increases making them vulnerable to static electricity damage
Solution Approach 1:
A protective pattern is introduced as an intermediary element between the connection patterns and static electricity. This protective pattern, formed of opaque metallic material with lower resistance than the connection patterns, acts as a mediator that intercepts static charge and redirects it away from the vulnerable intersection portions of the connection patterns, thereby protecting them from insulation breakdown or disconnection.
Solution Approach 2:
The patent converts the harmful effect of static electricity into a beneficial protective mechanism. By forming the protective pattern of opaque metallic material with lower resistance than the connection patterns, the static electricity is naturally guided along the path of least resistance - the protective pattern - which then safely dissipates the charge before it can damage the connection patterns. The harmful static charge becomes a useful indicator that triggers the protective mechanism.
2Strength
If connection patterns are made wider to improve strength and reduce resistance, then resistance to static electricity is improved, but insulation performance deteriorates due to increased overlap
Solution Approach 1:
The patent segments the protective function from the connection function by introducing a separate protective pattern that is distinct from the connection patterns. This segmentation allows the connection patterns to maintain their narrow width for good insulation while the protective pattern provides the additional static electricity protection. The protective pattern is formed in the same layer as the connection patterns but is spatially separated and functionally independent.
Solution Approach 2:
The patent employs composite material properties by combining transparent electrode material (for connection patterns requiring insulation) with opaque metallic material (for protective patterns requiring low resistance). This composite approach allows different regions of the touch panel to have different material properties optimized for their specific functions - connection patterns use transparent materials for visibility and insulation, while the protective pattern uses opaque metallic material for static electricity dissipation.
3Strength
If opaque metallic material is used for connection patterns to improve resistance to static electricity, then strength is improved, but transparency is reduced affecting display quality
Solution Approach 1:
The patent applies local quality by using different material properties in different locations. The connection patterns use transparent electrode material to maintain display quality, while only the protective pattern uses opaque metallic material to provide static electricity protection. This localized application of opaque material ensures that transparency is maintained in the display areas where it is most important, while protection is provided where needed.
Solution Approach 2:
The patent applies partial action by providing protection only where most needed - at the intersection portions of connection patterns that are most vulnerable to static electricity. Rather than making the entire connection pattern structure opaque and resistant to static electricity, the protective pattern is strategically positioned only at these critical intersection areas, providing targeted protection with minimal impact on overall transparency.
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 implementation of static electricity induction patterns enhances the resistance to static electricity-induced failures, ensuring the stability and reliability of the touch screen panel by redirecting static electricity away from critical intersection points, thus preventing driving failures.
Implementation Method 1
the second bridging part is provided with a static discharge tip overlapping a first sensing cell
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A touch screen panel comprises a plurality of first sensing cells (12a) connected along a first direction on a transparent substrate (10), and a plurality of second sensing cells (12b) disposed between respective first sensing cells (12a) and connected along a second direction. A plurality of first connection patterns (13a) connects the first sensing cells (12a) along the first direction and a plurality of second connection patterns (13b) connects the second sensing cells (12b) along the second direction A plurality of static electricity induction patterns (14a, 14a', 14a", 14b, 14b') are connected to the first or second sensing cells (12a, 12b) and extend in a direction toward a sensing cell (12a, 12b) adjacent to a sensing cell (12a, 12b) to which each of the static electricity induction patterns (14a, 14a', 14a", 14b, 14b') is connected so that its end portion overlaps the neighboring sensing cell (12a, 12b). A first insulating layer (30) is interposed between the first and second connection patterns (13a, 13b), and between the static electricity induction patterns (14a, 14a', 14a", 14b, 14b') and the neighboring sensing cell (12a, 12b).