GOA Circuit Leakage Suppression via Node Potential Control
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Solution Overview
Problem
The GOA circuit is prone to electrical leakage when operated in high temperature and high humidity environments for a long time, leading to malfunction.
Innovation Solution
The GOA circuit is designed with a node control module, pull-up module, pull-down module, pull-down maintaining module, and stop control module, which includes transistors and capacitors to manage node potentials and suppress electrical leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the GOA circuit is operated in high temperature and high humidity environment for a long time, then the circuit continues to function, but electrical leakage occurs causing malfunction
Solution Approach 1:
The pull-down maintaining module is activated before the touch stop stage to pre-suppress electrical leakage at the first node. By proactively maintaining the first node at low potential and suppressing leakage currents in advance, the circuit prevents accumulation of electrical leakage that would otherwise occur during extended operation in high temperature and humidity environments.
Solution Approach 2:
The pull-down maintaining module acts as an intermediary component between the node control module and the output stage. It introduces an additional control layer that specifically targets and suppresses electrical leakage at the first node, isolating the leakage problem from affecting the overall circuit functionality during long-term operation.
2Productivity
If the GOA circuit operates continuously, then scan signals are maintained, but negative drift and off-state current increase
Solution Approach 1:
The stop control module implements periodic stopping of scan signal output during touch stop stages. By periodically halting the scan signal transmission and activating the pull-down maintaining module, the circuit reduces off-state current accumulation and negative drift effects while still maintaining overall productivity through resumption of normal operation cycles.
Data Source
AI summary
The present disclosure provides a gate driver on array (GOA) circuit including a plurality of GOA units disposed in N-stage cascade, and an nth-stage GOA unit includes a node control module, a pull-up module, a pull-down module, a pull-down maintaining module, and a stop control module, wherein 1<n<N−1, and both the n and the N are positive integers.