Auxiliary Protection Circuit for Electrostatic Discharge in Narrow Display Frames
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Solution Overview
Problem
Conventional electronic devices with narrow border frames face inadequate electrostatic discharge protection, leading to signal interference and malfunctions due to close proximity of touch-sensitive display and ground circuits, which fail to effectively dissipate electrostatic charges.
Innovation Solution
A panel device with an auxiliary protection circuit positioned between the signal and ground protection circuits in the frame area, forming a conduction path for electrostatic charges, and adjusting the width relationship between these circuits to enhance electrostatic discharge dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the border frame area is shrunk to increase the touch-sensitive display surface area, then the product surface area is optimized, but the electrostatic discharge protection capability deteriorates due to tight parallel disposition of signal and ground circuits
Solution Approach 1:
The protection circuit is segmented into multiple independent components: ground protection circuit, auxiliary protection circuit, and signal circuit. Each segment performs a specific function in the electrostatic discharge protection chain, allowing optimized spacing and function allocation within the narrow frame area.
Solution Approach 2:
The auxiliary protection circuit acts as an intermediary element positioned between the ground protection circuit and the signal circuit. It provides an intermediate conduction path that mediates electrostatic charge dissipation, preventing direct coupling between ground and signal circuits while maintaining protection effectiveness.
2Reliability
If ground circuits are installed beside the touch-sensitive display circuit to provide conduction path for electrostatic charges, then electrostatic tolerance is increased, but the circuit density increases and space for signal routing is reduced
Solution Approach 1:
The protection function is segmented into multiple specialized circuits rather than using a single ground circuit. This segmentation allows each circuit component to be optimized for its specific function while sharing the frame area efficiently.
Solution Approach 2:
The frame area serves multiple functions: it houses the signal circuit, ground protection circuit, and auxiliary protection circuit, all working together for electrostatic discharge protection. The frame structure is utilized as a multi-functional zone rather than merely a border.
3Reliability
If electrostatic charges are conducted to the ground circuit, then electrostatic discharge path is provided, but electrostatic sparks are generated that can reach the touch-sensitive display signal circuit causing abnormal performance
Solution Approach 1:
The auxiliary protection circuit serves as an intermediary barrier between the ground protection circuit and signal circuit. It provides a controlled conduction path for electrostatic charges while preventing uncontrolled spark generation that could reach the signal circuit.
Solution Approach 2:
The auxiliary protection circuit is positioned in advance between the ground and signal circuits to cushion or absorb potential electrostatic sparks before they can reach the signal circuit, preventing harmful effects.
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 auxiliary protection circuit effectively channels electrostatic discharges away from the signal circuit, increasing electrostatic tolerance by providing an additional dissipation path and preventing signal interference, thereby enhancing the overall electrostatic discharge protection.
Implementation Method 1
the auxiliary protection circuit is disposed between the signal circuit and the ground protection circuit to act as a conduction path for electrostatic charges and thereby prevent the signal circuit from electrostatic discharges
Data Source
AI summary
A display device includes a substrate, at least one signal circuit, a ground protection circuit, and an auxiliary protection circuit. The substrate has a first surface, wherein the first surface includes an active area and a frame area surrounding the active area. The at least one signal circuit is disposed and extending along the frame area and electrically coupled to the active area. The ground protection circuit is disposed and extending along the frame area, wherein the ground protection circuit is positioned at a side of the signal circuit facing an edge of the substrate. The auxiliary protection circuit is disposed and extending along the frame area. The auxiliary protection circuit is disposed between the signal circuit and the ground protection circuit, wherein the auxiliary protection circuit respectively has a gap with the signal circuit and the ground protection circuit, and is electrically conductive.