Touch Electrode Static Discharge Management via Segmented Wires
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Solution Overview
Problem
Existing touch electrode structures are prone to electrostatic discharge, leading to static charge accumulation at bridging portions with high curvature, which can cause fusion and result in open circuits due to excessive current flow.
Innovation Solution
The touch electrode design incorporates a second conductive portion comprising multiple wires, where at least one wire has a width smaller than a preset value, allowing for effective static electricity release and ensuring continuous conduction even if the finer wire fuses, using a combination of main and sub-wires with varying widths and configurations to manage electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bridging portion is located at the thinnest location with high surface curvature, then the electrode structure is compact and connected, but static charges accumulate at the bridging portion causing electrostatic discharge and potential open circuits
Solution Approach 1:
The second conductive portion is segmented into multiple parallel wires instead of being a single continuous structure. This segmentation allows static charges to be distributed across multiple wires, reducing charge accumulation at any single point and preventing electrostatic discharge from causing open circuits.
Solution Approach 2:
Different wires within the second conductive portion have different width specifications. At least one wire has a width smaller than a first preset value to serve as a static electricity release path, while other wires maintain normal width for signal transmission. This local differentiation allows the structure to simultaneously handle static discharge and maintain reliable electrode connections.
2Object-affected harmful factors
If a wire with small width is used for static electricity release, then electrostatic discharge is effectively managed, but the wire may fuse due to large current flow
Solution Approach 1:
The second conductive portion is divided into multiple wires with different functions. Thin wires (width < first preset value) are dedicated to static electricity release, while thicker wires maintain signal transmission capability. This functional segmentation allows thin wires to safely handle electrostatic discharge currents without risking fusion, as they are designed specifically for this purpose and isolated from high-voltage signal paths.
Solution Approach 2:
The thin wire acts as an intermediary or sacrificial element that safely channels static electricity away from the main electrode structure. By providing this dedicated static discharge path, the thin wire protects the overall electrode system from electrostatic damage while its specialized design (small width) optimizes it for static charge dissipation rather than high-current signal transmission.
3Object-affected harmful factors
If the second conductive portion uses multiple wires with varying widths, then static electricity release is improved, but the device structure becomes more complex
Solution Approach 1:
The second conductive portion is segmented into multiple wires that can be manufactured using standard multi-wire fabrication processes. While the wires have different width specifications, they follow the same basic structural pattern and can be created in a single manufacturing step, minimizing the increase in device complexity. The segmentation is functional rather than structural, allowing efficient static discharge management without proportionally increasing manufacturing complexity.
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 open circuits during electrostatic discharge by directing static charges to finer wires, ensuring continuous signal transmission and reducing the risk of electrode fusion, while maintaining low resistance and favorable signal transmission.
Implementation Method 1
the wire having the width smaller than the first preset value is configured for release of static electricity
Data Source
AI summary
A touch electrode, a display panel and a display device are provided. The touch electrode includes a plurality of first electrodes provided along a first direction, a plurality of second electrodes provided along a second direction, a first conductive portion, an insulation layer and a second conductive portion. Adjacent ones of the first electrodes are connected through the first conductive portion, on which the insulation layer is arranged; adjacent ones of the second electrodes are connected through the second conductive portion which is provided on the insulation layer; and the second conductive portion includes a plurality of wires, at least one wire has a width smaller than a first preset value, and the wire having the width smaller than the first preset value is configured for the release of static electricity.