Touch Panel Insulation Layer for Electrostatic Protection
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Solution Overview
Problem
Conventional touch panels with sensor parts on the back face of a substrate are susceptible to electrostatic destruction due to static electricity flowing from the operation face, especially under inappropriate conditions or environments, as the bridge wire has lower resistance compared to the electrodes.
Innovation Solution
A touch panel design featuring a substrate with an operation face and a sensor face, where the sensor part and wires are covered by an insulation layer, and a cutout in the insulation layer exposes a part of the wire for external connection, ensuring the wire and external connection are further covered by an insulation part, preventing static electricity from reaching the sensor part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bridge wire has lower resistance compared to the electrodes to improve electrical connection, then electrical conductivity is improved, but the sensor part becomes more susceptible to electrostatic destruction from static electricity flowing from the operation face
Solution Approach 1:
The patent introduces an insulation layer as an intermediary protective barrier between the operation face and the sensor part. This insulation layer specifically covers the bridge wire and sensor part, preventing direct contact between static electricity from the operation face and the sensitive electrical components, thus resolving the contradiction between maintaining low resistance for good electrical connection and protecting against electrostatic destruction
Solution Approach 2:
The patent employs a thin film insulation layer that conformally covers the sensor part and bridge wire. This thin film structure provides effective electrostatic protection while maintaining the electrical functionality of the underlying components, allowing good electrical connection through the bridge wire while preventing harmful static electricity from reaching sensitive areas
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
Effectively prevents electrostatic destruction of the sensor part by ensuring the sensor part and wires remain insulated, even if static electricity is generated on the operation face, thereby reducing malfunctions caused by noise currents.
Implementation Method 1
an insulation layer that covers the sensor part and the wire
Data Source
AI summary
A touch panel includes a substrate having an operation face, a sensor part provided at a sensor face of the substrate, and a wire led out from the sensor part to the sensor face to be connected to an external connection part. The sensor part and the wire are covered by an insulation layer. A cutout is provided to the insulation layer to expose a part of the wire to which the external connection part is connected. An insulation part is provided to cover the external connection part, the insulation layer and the wire located at the cutout. The touch panel can reliably prevent static electricity generated at the operation face during panel operation from entering the sensor part via the wire and the external connection part and causing electrostatic destruction of a bridge and such of the sensor part.