Touch Panel Electrostatic Protection Circuit Border Size Reduction
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Solution Overview
Problem
Conventional touch panels with electrostatic protection circuits located at the outermost periphery increase the border size, contradicting the goal of reducing electronic product sizes.
Innovation Solution
The electrostatic protection circuit is integrated into a light-shielding layer or embedded within the substrate's peripheral region, reducing the border size by overlapping projections and using a double-layer protection design with shared materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrostatic protection circuit is arranged at the outermost periphery of the peripheral region, then the electrostatic protection function is improved, but the border size of the touch panel increases
Solution Approach 1:
The patent merges the electrostatic protection circuit with the light-shielding layer structure. The circuit is embedded within the light-shielding layer or positioned to overlap with it, combining two functional elements (protection and light shielding) into a unified structure that reduces overall border size while maintaining both functions.
Solution Approach 2:
The patent utilizes vertical layering (z-dimension) by embedding the electrostatic protection circuit within the light-shielding layer structure. This multi-layer configuration allows the circuit to occupy space in the vertical dimension rather than extending the horizontal border, effectively reducing the border size while maintaining protection functionality.
2Length of stationary object
If the border size of the touch panel is reduced, then the overall product size is decreased, but the electrostatic protection function may be compromised
Solution Approach 1:
By integrating the electrostatic protection circuit with the light-shielding layer, the patent achieves space efficiency without sacrificing protection. The merged structure ensures that the circuit remains functional while occupying less horizontal space, thus reducing border size while maintaining reliability.
Solution Approach 2:
The patent employs a composite structure combining the electrostatic protection circuit with the light-shielding layer material. This composite approach allows the circuit to be embedded within or alongside the light-shielding material, creating a multifunctional element that provides both electrostatic protection and light shielding in a compact configuration.
Data Source
AI summary
A touch panel is provided, including a substrate, a touch sensing array, a first electrostatic protection circuit, a first insulating layer and a plurality of first connecting lines. The substrate has an active region and a peripheral region surrounding the active region. The touch sensing array is disposed on the substrate and located in the active region. The first electrostatic protection circuit is disposed on the substrate and located in the peripheral region. The first insulating layer is disposed on the substrate and located in the peripheral region, wherein the first insulating layer covers the first electrostatic protection circuit. The plurality of first connecting lines is disposed on the first insulating layer and coupled to the touch sensing array respectively.