GOA Circuit Electrostatic Protection via Level Conversion
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Solution Overview
Problem
The Gate Driver on Array (GOA) technique is susceptible to electrostatic interference, which causes screen sweeping phenomena and abnormal displays in liquid crystal panels, necessitating an effective electrostatic protection method.
Innovation Solution
An electrostatic protection method and apparatus that monitor interface signals of timing control and level conversion circuits for interference, adjusting timing control signals to the gate driving circuit of the array substrate, including level conversion and detection circuits to mitigate interference effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If GOA technique is used to directly manufacture gate driving circuits on array substrate, then production processes are reduced and integration is improved, but the circuit becomes susceptible to electrostatic interference causing screen abnormalities
Solution Approach 1:
A level conversion circuit is introduced as an intermediary component between the timing control circuit and the GOA circuit. This level conversion circuit not only performs level conversion but also provides electrostatic protection, thereby resolving the contradiction between manufacturing integration and electrostatic reliability
Solution Approach 2:
The protection function is segmented from the main GOA circuit and implemented through a dedicated detection circuit and level conversion circuit. This segmentation allows the protection mechanism to operate independently while maintaining the simplicity of the GOA structure
2Reliability
If external silicon chips are used for gate driving circuits, then electrostatic protection is more reliable, but production processes are more complex and production cost increases
Solution Approach 1:
The level conversion function and electrostatic protection function are merged into a single level conversion circuit integrated on the array substrate. This eliminates the need for external silicon chips while maintaining protection reliability and simplifying manufacturing
Solution Approach 2:
The level conversion circuit is designed to perform multiple functions: level conversion and electrostatic protection. This multi-functionality replaces what would traditionally require separate external components, reducing manufacturing complexity while maintaining reliability
3Reliability
If detection circuit is added to monitor interface signals for electrostatic interference, then protection effectiveness is improved, but device complexity increases
Solution Approach 1:
The detection circuit monitors interface signals using the existing circuit resources and signal paths. The level conversion circuit itself participates in the detection process, and the protection is triggered automatically based on detection results, minimizing the need for additional independent components
Data Source
AI summary
The present disclosure discloses an electrostatic protection method, an electrostatic protection apparatus and a liquid crystal display. The electrostatic protection method includes: monitoring an interface signal of a timing control circuit and/or a level conversion circuit to determine whether the monitored signal is subjected to electrostatic interference; and when the electrostatic interference is detected, adjusting a timing control signal output by the timing control circuit to a gate driving circuit of an array substrate, wherein the level conversion circuit connects the timing control circuit to the gate driving circuit of the array substrate, and is configured to perform level conversion on an output signal output by the timing control circuit to the gate driving circuit of the array substrate.