Gate Driver AC Clear-Signal Initialization for Stable Display Driving
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Solution Overview
Problem
Existing display devices face issues with driving reliability, stability, and lifespan due to residual charges and leakage current in signal generation circuits, which are not effectively addressed by current technologies.
Innovation Solution
A gate driving circuit incorporating a clear signal line that delivers alternating current with positive and negative voltages to initialize nodes of the scan and light-emitting signal generation circuits, ensuring simultaneous initialization and reducing leakage current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gate driving circuit operates without a clear signal initialization mechanism, then the circuit structure remains simple, but residual charges accumulate in signal generation circuits causing degraded driving reliability and stability
Solution Approach 1:
The clear signal line delivers a clear signal to initialize nodes of the scan signal generation circuit and light-emitting signal generation circuit before normal operation begins. This preliminary initialization action removes residual charges from capacitors and transistors, ensuring reliable driving performance from the start of operation without requiring complex continuous monitoring systems.
Solution Approach 2:
A clear signal line is introduced as an intermediary element between the power supply and the signal generation circuits. This clear signal line carries initialization signals that temporarily connect to various nodes (such as node Q and node Qb) to remove residual charges, acting as a mediator that enables reliable operation without permanently complicating the circuit structure.
2Duration of action of moving object
If residual charges are not removed from signal generation circuits, then the circuit operation continues without interruption, but leakage current increases reducing device lifespan
Solution Approach 1:
The clear signal is applied periodically to initialize nodes during operation. The clear signal line delivers initialization pulses at appropriate intervals to remove accumulated residual charges from capacitors and transistors, preventing leakage current buildup while maintaining continuous operation. This periodic initialization extends device lifespan without requiring permanent circuit modifications.
3Stability of the object's composition
If nodes in signal generation circuits are not initialized, then the circuit operates continuously, but driving stability deteriorates due to charge accumulation
Solution Approach 1:
The clear signal line delivers rapid initialization pulses that quickly remove residual charges from critical nodes (node Q, node Qb) in the signal generation circuits. These brief skipping actions occur during natural circuit idle periods or transition phases, restoring driving stability without causing significant time loss to the overall operation.
Data Source
AI summary
Provided are a gate driver and a display device including the same. The display device may include a display panel configured to display an image, a data driver configured to supply a data voltage to the display panel, a gate driver including a scan signal generation circuit configured to supply a scan signal to the display panel and a light-emitting signal generation circuit configured to supply a light-emitting signal to the display panel, and a clear signal line connected to the gate driver to deliver a clear signal in an alternating current form including a positive voltage and a negative voltage, wherein the gate driver initializes at least one of nodes of the scan signal generation circuit and nodes of the light-emitting signal generation circuit based on the clear signal.