Electrostatic Protection Device for Display Panel
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Solution Overview
Problem
Conventional display panels are vulnerable to electrostatic discharge (ESD) from external sources, which can damage internal components without being effectively prevented by existing static electricity-proof units, leading to significant economic losses due to component degradation and increased maintenance costs.
Innovation Solution
An electrostatic protection device comprising a first and second electric discharge circuit, where the first circuit discharges static electricity generated within the display panel to an electrostatic discharge line, and the second circuit, featuring transistors and a voltage delay unit, discharges external static electricity to prevent it from entering the display circuit, thereby protecting the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional static electricity-proof unit is disposed in the display panel, then static electricity generated within the display circuit can be discharged, but external static electricity can still enter and damage the display circuit
Solution Approach 1:
The electrostatic protection function is segmented into two independent circuits: the first electric discharge circuit handles internal static electricity from display circuit elements, while the second electric discharge circuit handles external static electricity from signal input terminals. This segmentation allows each circuit to be optimized for its specific protection task, resolving the contradiction between internal discharge capability and external protection.
Solution Approach 2:
The second electric discharge circuit acts as an intermediary protective layer between external signal sources and the vulnerable display circuit. By providing a dedicated discharge path for external static electricity through the external signal input terminal, it prevents harmful charges from reaching internal components while maintaining normal signal input functionality.
2Device complexity
If the display panel lacks electrostatic protection, then device complexity is reduced, but electrostatic discharge causes component degradation and economic loss
Solution Approach 1:
The electrostatic protection circuits operate autonomously without requiring external control or intervention. The first electric discharge circuit automatically discharges static electricity generated within the display circuit, while the second circuit automatically discharges external static electricity through the external signal input terminal. This self-service mechanism provides reliable protection while maintaining structural simplicity.
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
Effectively discharges static electricity within the display panel and prevents external static electricity from entering, thereby safeguarding the panel from damage and reducing maintenance and economic losses.
Implementation Method 1
the first electric discharge circuit is configured to discharge static electricity to the electrostatic discharge line when the display circuit of the display panel generates static electricity
Implementation Method 2
the second electric discharge circuit discharges static electricity into the electrostatic discharge line when the external signal input terminal generates static electricity to prevent static electricity generated on the external signal input terminal from entering the display circuit
Implementation Method 3
the first transistor is switched on when a voltage difference between the gate electrode of the first transistor and the source electrode of the first transistor exceeds a first predetermined threshold value to discharge to discharge positive charges on the external signal input terminal
Data Source
AI summary
An embodiment of the present invention discloses an electrostatic protection device and a display panel. The electrostatic protection device includes a first electric discharge circuit and a second electric discharge circuit. An input terminal of the first electric discharge circuit is connected to a display circuit of the display panel. An output terminal of the first electric discharge circuit is connected to an electrostatic discharge line. An input terminal of the second electric discharge circuit is connected to an external signal input terminal of the display circuit. An output terminal of the second electric discharge circuit is connected to the electrostatic discharge line. The present invention can prevent damages of the display panel.