Display Panel ESD Discharge Circuit for Continuous Overload Protection
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Solution Overview
Problem
Display panel static electricity protection devices, such as those using reverse diodes, are prone to damage from high-energy or continuous electronic static discharge, leading to inadequate protection and reliability issues.
Innovation Solution
A static electricity protection device comprising a detection sub-circuit, a discharge circuit, and a current driving sub-circuit that detects static electricity and temporarily conducts it to a discharge terminal, utilizing a semiconductor field effect transistor with greater overload capacity than a reverse diode, ensuring safe discharge without damaging the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reverse diode is used for static electricity protection, then the device can discharge static electricity, but the protection device is damaged by high-energy or continuous static discharge
Solution Approach 1:
The protection device is divided into multiple functional modules: a detection sub-circuit that monitors static electricity levels, a current driving sub-circuit that controls discharge timing, and a discharge circuit that executes the discharge. This segmentation allows each module to perform its specific function optimally, with the detection circuit identifying when discharge is needed and the current driving circuit controlling the discharge process to prevent damage from excessive current.
Solution Approach 2:
The detection sub-circuit continuously monitors static electricity levels before they reach dangerous levels. By detecting the presence of static electricity in advance, the system can prepare for discharge and execute it at the optimal moment, preventing the accumulation of harmful charge levels while avoiding unnecessary discharge operations that could damage the protection device.
2Reliability
If continuous static electricity discharge is performed, then protection is maintained, but the protection device burns due to energy accumulation
Solution Approach 1:
The discharge operation is performed periodically based on detection results rather than continuously. The detection sub-circuit monitors static electricity levels and triggers discharge only when needed, creating a periodic discharge pattern. This approach maintains protection reliability by ensuring discharge occurs when static electricity accumulates, while avoiding continuous energy dissipation that would burn out the protection device.
Solution Approach 2:
The detection sub-circuit provides feedback about static electricity levels to the current driving sub-circuit, which then controls the discharge circuit accordingly. This feedback mechanism ensures that discharge operations are performed only when static electricity is detected, creating a closed-loop control system that balances protection needs with energy conservation, preventing both under-protection and over-discharge damage.
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 discharges static electricity to a discharge terminal, enhancing protection performance and reliability by preventing damage from high-energy or continuous discharges, thereby improving the overall static electricity protection of display panels.
Implementation Method 1
The detection sub-circuit is configured to detect static electricity
Implementation Method 2
the static electricity is discharged to the discharge terminal through the discharge circuit and the current driving sub-circuit
Data Source
AI summary
The present disclosure provides a display panel static electricity protection device (400), static electricity protection method, and a display device (100), including a detection sub-circuit (401), a detection sub-circuit (401), a discharge circuit (402) connected with the driving chip (301), a current driving sub-circuit (403) connected with the detection sub-circuit (401), the discharge circuit (402), and a discharge terminal (404), and the discharge terminal (404) connected with a grounding wire of the driving circuit board. The detection sub-circuit (401) detects static electricity, the current driving sub-circuit (403) inputs and detects current in the detection sub-circuit (401) to open or close the discharge circuit (402). The static electricity is discharged to the discharge terminal (404) through the discharge circuit (402) and the current driving sub-circuit (403).