Touch Screen Substrate Ground Loop Segmentation
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Solution Overview
Problem
Existing One Glass Solution (OGS) touch screens face reduced anti-static ability due to interference currents generated by the antenna effect, which necessitates interrupting the ground wire conduction loop to prevent interference, thereby compromising the screen's performance.
Innovation Solution
A substrate design featuring a first and second wiring with multiple cross points, insulated from each other, forming a ground wire conduction loop that reduces interference currents without interrupting the loop, maintaining the anti-static ability of the touch screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the ground wire conduction loop is interrupted to prevent antenna effect interference, then the interference current is reduced, but the anti-static ability is greatly reduced
Solution Approach 1:
The ground wire conduction loop is segmented into multiple sections by introducing cross points where insulating layers are placed. This divides the continuous loop into multiple insulated segments that still maintain electrical connection through the substrate, reducing antenna effect interference while preserving the overall grounding function and anti-static ability.
Solution Approach 2:
Insulating layers are introduced as intermediary elements at the cross points between the first and second wirings. These insulating layers prevent direct electrical contact between the two ground wires while allowing them to maintain spatial proximity and form the conduction loop, thereby reducing interference current without compromising the grounding path.
2Reliability
If the first wiring and second wiring are arranged close to form a ground wire conduction loop, then the anti-static ability is improved, but interference current is generated due to antenna effect
Solution Approach 1:
The ground wire conduction loop is segmented into multiple sections by introducing cross points where insulating layers are placed. This divides the continuous loop into multiple insulated segments that still maintain electrical connection through the substrate, reducing antenna effect interference while preserving the overall grounding function and anti-static ability.
Solution Approach 2:
The solution moves from a two-dimensional planar arrangement to a three-dimensional structure by stacking the first and second wirings at different levels with insulating layers in between. This vertical arrangement allows the wirings to be close for effective grounding while preventing direct electrical contact that causes interference current.
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 substrate effectively reduces interference currents in the ground wire conduction loop while preserving the anti-static ability of the touch screen by utilizing cross points and insulating layers to prevent short-circuits and maintain the integrity of the ground wire loop.
Implementation Method 1
insulating layers for insulating the first wiring from the second wiring are provided at the cross points of the first wiring and the second wiring
Data Source
AI summary
A substrate, a touch screen and a touch display device to enhance the anti-interference and anti-static ability of the touch screen are disclosed. The substrate comprises a functional area and a peripheral area, wherein a first wiring and a second wiring insulating from each other are arranged in the peripheral area, the first wiring and second wiring are grounded respectively and are connected to a circuit board respectively to form a ground wire conduction loop; and the first wiring and the second wiring have a plurality of cross points. The touch screen comprises said substrate. The substrate provided in the present disclosure can be used in the touch display device.