Display Panel Electrostatic Discharge Circuit Design
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Solution Overview
Problem
Current liquid crystal display panels lack effective protection against electrostatic discharge (ESD), which can lead to chip puncture, increased leakage current, and accelerated aging, compromising their electrical performance and service life.
Innovation Solution
A display panel incorporating an electrostatic discharge circuit with a first and second discharge circuit, connected to voltage gate terminals and a common voltage terminal, respectively, to enhance the ESD current path and leakage current, thereby providing better protection against ESD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional single discharge circuit is used for ESD protection, then the circuit structure is simple, but the ESD protection effectiveness is insufficient and leakage current is inadequate
Solution Approach 1:
The ESD protection circuit is divided into two separate discharge circuits (first discharge circuit and second discharge circuit) with different configurations. The first discharge circuit connects between voltage gate high terminal and voltage gate low terminal, while the second discharge circuit connects between voltage gate high terminal and common voltage terminal. This segmentation allows each circuit to contribute differently to ESD protection, increasing overall protection effectiveness and leakage current while managing complexity through modular design.
2Object-affected harmful factors
If the ESD protection circuit is enhanced with multiple discharge paths, then the leakage current and protection capability are improved, but the circuit complexity increases
Solution Approach 1:
The voltage gate high terminal serves as a common intermediary node for both discharge circuits. The first discharge circuit uses voltage gate low terminal as the other endpoint, while the second discharge circuit uses common voltage terminal. This intermediary approach allows multiple discharge paths to converge at a common point, providing enhanced ESD protection through increased leakage current while maintaining relatively manageable circuit complexity through shared components.
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 enhanced ESD protection circuit increases the speed and number of leakage currents, effectively prolonging the service life and reliability of the display panel by efficiently managing electrostatic discharge.
Implementation Method 1
for electrostatic discharge (ESD), if the ESD exceeds a certain voltage, then an integrated circuit chip medium is punctured, a chip wire is broken, leakage current is increased to accelerate aging
Data Source
AI summary
The present application disclose a display panel and display device, including a substrate, and an electrostatic discharge circuit disposed on the substrate and including a voltage gate high terminal (VGH terminal), a voltage gate low terminal (VGL terminal), an electrostatic input end and a common voltage terminal (VCOM terminal) coupled with components of the display panel; and a first discharge circuit, where an output end of the first discharge circuit is respectively connected to the voltage gate high terminal and the voltage gate low terminal, and a control end and an input end of the first discharge circuit are connected to the electrostatic input end; and a second discharge circuit, where an input end of the second discharge circuit is connected to the electrostatic input end, and an output end of the second discharge circuit is connected to the common voltage terminal.