GOA Circuit Voltage Stabilization for TP Suspension Leakage
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Solution Overview
Problem
The Gate Driver On Array (GOA) circuit experiences leakage issues during the touch panel suspension stage in liquid crystal display technology, leading to transmission failures due to potential fluctuations and stress on thin-film transistors.
Innovation Solution
A GOA circuit design with a voltage stabilizer module that regulates node potentials using forward and backward scanning control, potential regulation, and node control modules to maintain stable voltages, preventing conduction anomalies during suspension stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the GOA circuit operates during touch panel suspension, then the scanning function is maintained, but leakage occurs due to potential fluctuations and transistor stress
Solution Approach 1:
The patent applies preliminary action by pre-regulating the potentials at the first node and output terminal before the suspension stage begins. The potential regulation module adjusts these potentials in advance based on the suspension signal, ensuring that when suspension occurs, the circuit is already in a stable state that prevents leakage current. This proactive adjustment eliminates the harmful leakage effect before it can manifest.
2Duration of action of stationary object
If the GOA circuit maintains scanning during suspension, then display continuity is preserved, but potential fluctuations cause transmission failures
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the electrical potential parameters at critical nodes (first node and output terminal) based on the operational stage. During suspension, the potential regulation module changes the potential values to specific regulated levels that prevent fluctuations. This parameter adjustment allows the scanning to continue while eliminating the potential fluctuations that would otherwise cause transmission failures.
3Device complexity
If the GOA circuit operates without potential regulation, then the circuit structure is simpler, but leakage and stress on thin-film transistors increase
Solution Approach 1:
The patent introduces a potential regulation module as an intermediary component between the signal input and the thin-film transistors. This module acts as a mediator that regulates and stabilizes the potentials before they reach the transistors, thereby reducing stress on the transistor gates. While this adds some circuit complexity, it significantly reduces the harmful transistor stress and leakage effects.
4Speed
If the potential at nodes is not regulated, then the circuit operation is faster, but leakage and operational anomalies occur during suspension
Solution Approach 1:
The potential regulation module performs preliminary action by pre-adjusting the node potentials to optimal values before the suspension stage begins. This ensures that when suspension occurs, the circuit operates from a pre-stabilized state, preventing leakage and operational anomalies. The regulation happens in advance, so it does not significantly impact the overall operation speed while ensuring reliable operation throughout the suspension period.
Data Source
AI summary
The present embodiment provides a GOA circuit and a display panel, in which the GOA circuit comprises a forward/backward scanning control module, an output module, a potential regulation module, a node control module, and a voltage stabilizer module. A first node and a third node are not conducted when a second node is at a second potential; the first node and the third node are conducted and have a second potential when the second node is at a third potential, wherein the second potential is opposite to the third potential. Thus, GOA circuit's leakage issue existing in the TP suspension stage can be improved.