Display Panel ESD Circuit Layout for Wiring Line Protection

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Solution Overview

Problem

Display devices using LEDs are susceptible to static electricity, which can cause short circuits and disconnections in wiring lines, and there is a need for effective static electricity discharge mechanisms to protect the display panel and minimize these issues.

Innovation Solution

Incorporation of electrostatic discharge circuits connected to wiring lines, with one pair connected to high potential power lines and another to low potential power lines, to facilitate easy discharge of static electricity entering the display panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If electrostatic discharge circuits are connected to each wiring line, then the wiring lines are protected from static electricity, but the device complexity increases

Engineering Contradiction:

Improveprotection from static electricityVSAvoidnumber of electrostatic discharge circuits

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Multiple electrostatic discharge circuits are merged into a single shared electrostatic discharge circuit. This circuit is configured to discharge static electricity from multiple wiring lines sequentially through switching mechanisms, reducing the total number of electrostatic discharge circuits while maintaining protection functionality across all wiring lines.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shared electrostatic discharge circuit is designed to serve multiple wiring lines simultaneously or sequentially. By implementing a universal electrostatic discharge mechanism that can handle different wiring lines through controlled switching, the system achieves multi-functionality without requiring a dedicated electrostatic discharge circuit for each wiring line.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If electrostatic discharge circuits are added to protect wiring lines, then reliability improves, but the manufacturing complexity increases

Engineering Contradiction:

Improveprotection from static electricityVSAvoidmanufacturing process complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The manufacturing process benefits from merging multiple electrostatic discharge circuits into one shared circuit. This consolidation reduces the number of components that need to be manufactured, assembled, and tested, thereby simplifying the overall manufacturing process while maintaining the essential protection function.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shared electrostatic discharge circuit is designed with universal applicability to multiple wiring lines, allowing for standardized manufacturing processes. This universality enables the use of common manufacturing techniques and assembly procedures across different wiring line configurations, reducing manufacturing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If multiple electrostatic discharge circuits are used, then protection coverage is improved, but the area occupied increases

Engineering Contradiction:

Improveprotection coverageVSAvoidarea occupied by electrostatic discharge circuits

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

Multiple electrostatic discharge circuits are merged into a single shared circuit structure, significantly reducing the total area occupied by electrostatic discharge components. The shared circuit uses switching mechanisms to provide protection across multiple wiring lines without requiring separate dedicated circuits for each line, thereby minimizing space consumption.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The electrostatic discharge protection is implemented by adding a temporal dimension through sequential switching, rather than requiring spatial separation of multiple circuits. The shared electrostatic discharge circuit alternates between serving different wiring lines in different time slots, effectively providing comprehensive protection while occupying minimal area.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 protects the display panel from static electricity, minimizing short circuits and disconnections in wiring lines, thereby enhancing the reliability and stability of the display device.

Implementation Method 1

one pair of electrostatic discharge circuits connected to the plurality of wiring lines, respectively

Methodology Applied

Scientific EffectElectrostatic discharge: Electrostatic Discharge

Data Source

PatentUS12592178B2Display device including an electrostatic discharge circuit for discharging static electricity

Publication Date: 2026.03.31 LG DISPLAY CO LTD

AI summary

A display device is disclosed. The display device includes a first substrate; a plurality of wiring lines that are on the first substrate and are connected to a plurality of data pads and a plurality of gate pads; and one pair of electrostatic discharge circuits connected to the plurality of wiring lines, respectively, one of the one pair of electrostatic discharge circuits is electrically connected to a plurality of high potential power lines and the other is electrically connected to a plurality of low potential power lines. Accordingly, one pair of electrostatic discharge circuits is connected to each of the plurality of wiring lines to easily protect the plurality of wiring lines from the static electricity.