Non-Transparent Conductive Layer Shielding Touch Panel Routings
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Solution Overview
Problem
Electronic devices with double-sided touch panels face signal interference from other circuit elements, compromising the stability and touch sensing effects due to noise reception.
Innovation Solution
The electronic device incorporates a non-transparent conductive layer on the second surface, which covers the first routings and blocks electromagnetic interference from adjacent circuits, thereby reducing noise and enhancing signal processing stability and touch effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a double-sided touch panel is used to reduce routing area, then the area occupied by routings is reduced, but the touch circuit receives significant noise from other circuit elements
Solution Approach 1:
A non-transparent conductive layer is introduced as an intermediary element between the touch circuit and other circuit elements. This layer acts as a shield that blocks electromagnetic noise from reaching the touch circuit while allowing the touch panel to maintain its double-sided configuration and routing efficiency.
Solution Approach 2:
The harmful electromagnetic interference is extracted and isolated from the touch circuit by positioning the non-transparent conductive layer between them. This separation allows the touch circuit to operate independently from noise generated by adjacent circuit elements.
2Area of stationary object
If the touch circuit is disposed on the top and bottom layers of the double-sided touch panel, then the routing area is reduced, but the signal processing stability is compromised
Solution Approach 1:
The non-transparent conductive layer serves as a protective intermediary that shields the touch circuit signals from electromagnetic interference. This ensures that signal processing remains stable even when the touch circuit is integrated into the double-sided panel structure with reduced routing area.
Solution Approach 2:
The potential harm of electromagnetic interference is converted into a benefit by using the non-transparent conductive layer as a shielding mechanism. This layer transforms the problematic noise environment into a protected signal environment, maintaining stability while achieving compact routing.
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 solution effectively reduces noise interference, improving the stability and touch sensing performance of the electronic device by isolating signal interference from other circuit elements, allowing for more reliable touch operations.
Implementation Method 1
the non-transparent conductive layer is disposed in the second peripheral region on the second surface. A projection range of the non-transparent conductive layer in the first surface covers the first routings
Data Source
AI summary
An electronic device is provided. A touch panel of the electronic device includes a substrate, a plurality of sensing electrodes, a plurality of driving electrodes, a plurality of first routings, a plurality of second routings, and a non-transparent conductive layer. The sensing electrodes are disposed on a first surface of the substrate. The driving electrodes are disposed on a second surface of the substrate. The first routings are coupled to the sensing electrodes and disposed in a first peripheral region on the first surface. The second routings are coupled to the driving electrodes and disposed in a second peripheral region on the second surface. The non-transparent conductive layer is disposed in the second peripheral region. A projection range of the non-transparent conductive layer in the first surface covers the first routings.