Display Panel ESD Discharge Circuit for Driving Chip 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 ineffective protection and reliability issues.
Innovation Solution
A static electricity protection device comprising a detection circuit connected to a driving chip, a discharge circuit, and a discharge terminal, where the detection circuit opens the discharge circuit to safely discharge static electricity to the terminal, utilizing a semiconductor field effect transistor with greater overload capacity than reverse diodes, ensuring continuous protection.
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 patent segments the static electricity protection function into two independent parts: a detection circuit that monitors static electricity levels and a discharge circuit that executes discharge only when needed. This segmentation allows the discharge circuit to remain inactive during normal operation, avoiding damage from continuous high-energy discharge, while still providing protection when static electricity exceeds thresholds.
Solution Approach 2:
The patent implements a dynamic discharge mechanism where the discharge circuit is activated only when the detection circuit identifies excessive static electricity. The semiconductor field effect transistor dynamically switches between conducting and non-conducting states based on real-time static electricity levels, allowing the system to adapt to varying conditions and avoid unnecessary discharge that could damage components.
2Reliability
If the discharge circuit is continuously active, then static electricity can be discharged, but energy is wasted and the device may be damaged
Solution Approach 1:
The patent implements periodic monitoring through the detection circuit that continuously checks for static electricity buildup, and periodic discharge only when necessary. The discharge circuit operates in discrete intervals triggered by detection events rather than continuously, reducing energy consumption while maintaining protection effectiveness through on-demand discharge actions.
Solution Approach 2:
The detection circuit provides feedback to the discharge circuit about static electricity levels. This feedback mechanism ensures the discharge circuit activates only when static electricity exceeds safe thresholds, preventing unnecessary energy consumption from continuous discharge while maintaining continuous protection through monitored, condition-based discharge actions.
3Device complexity
If reverse diode is used, then the structure is simple, but the overload capacity is insufficient for high-energy static discharge
Solution Approach 1:
The semiconductor field effect transistor serves multiple functions: it acts as a switch for the discharge circuit, provides overload protection through its inherent current-limiting characteristics, and enables controlled discharge timing. This multi-functionality replaces the simple but insufficient reverse diode with a component that handles both switching and protection tasks, increasing overload capacity without proportionally increasing complexity.
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 high-energy or continuous static electricity without damaging the protection device, enhancing protection performance and reliability by separating detection and discharge circuits and using a semiconductor field effect transistor for efficient energy management.
Implementation Method 1
the static electricity is discharged to the discharge terminal through the discharge circuit
Data Source
AI summary
The present disclosure provides a display panel static electricity protection device (400), a display panel static electricity protection method, and a display device (100), including a detection circuit (401), a discharge circuit (409), and a discharge terminal (411). The detection circuit (401) is connected with a driving chip (301) of a display panel. The discharge circuit (409) is connected with the detection circuit (401) and the driving chip (301). The discharge terminal (411) is connected with the discharge circuit (409) and the detection circuit (401).