Electrostatic Discharge Circuit for Display Panels
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Solution Overview
Problem
Existing liquid crystal displays are vulnerable to electrostatic discharge (ESD), which can cause dielectric breakdown, wire meltdown, and accelerated aging due to insufficient ESD protection, highlighting the need for an effective ESD protection circuit.
Innovation Solution
An electrostatic discharge circuit comprising a first discharge unit and an associated discharge unit, where the output terminal of the first discharge unit is coupled to a common terminal, and the associated discharge unit works with the first discharge unit to increase current paths, enhancing discharging speed and capacity, thereby providing better protection against ESD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional single discharge unit is used, then the circuit structure is simple, but the discharging capacity is insufficient
Solution Approach 1:
The electrostatic discharge circuit is divided into multiple independent discharge units (first discharge unit, second discharge unit, third discharge unit, fourth discharge unit), each with its own transistor and capacitor. This segmentation allows each unit to handle discharge independently, significantly increasing the total discharging capacity while maintaining reasonable circuit complexity through modular design.
2Power
If the line width of electroconductive wire is increased, then the discharging current is increased, but the resistance is decreased
Solution Approach 1:
The patent specifies different line width parameters for different electroconductive wires based on their function. The first electroconductive wire (connected to GND) has a first line width optimized for high current discharge, while the second electroconductive wire (connected to VCOM) has a second line width optimized for voltage stability. This parameter optimization ensures adequate discharging current while maintaining protection effectiveness.
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 proposed electrostatic discharge circuit effectively increases discharging speed and capacity, providing enhanced protection against ESD and extending the lifetime of the display panel by ensuring greater current discharge than conventional circuits.
Implementation Method 1
An electrostatic discharge circuit comprising a first discharge unit and an associated discharge unit... the associated discharge unit works with the first discharge unit to increase current paths, enhancing discharging speed and capacity
Data Source
AI summary
An electrostatic discharge circuit and a display panel are provided. The electrostatic discharge circuit comprises a first discharge unit and an associated discharge unit. An output terminal of the first discharge unit is coupled to a common terminal. A control terminal of the first discharge unit is coupled to a high voltage terminal or a low voltage terminal. An input terminal of the first discharge unit is coupled to an electrostatic input terminal. An input terminal of the associated discharge unit is coupled to the electrostatic input terminal, and an output terminal of the associated discharge unit is coupled to the control terminal of the first discharge unit.