Gate Driving Circuit Set-Reset Control for Abnormal Switching
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Solution Overview
Problem
Gate driving circuits in display devices can malfunction due to unstable node voltages during abnormal on/off situations, leading to performance issues.
Innovation Solution
A gate driving circuit with a first controller to control the voltage of a set node and a second controller to control the voltage of a reset node, along with first and second output transistors connected to these nodes, is implemented to stabilize node voltages and prevent malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gate driving circuit operates without additional control mechanisms, then the device complexity is reduced, but the reliability deteriorates due to unstable node voltages during abnormal on/off situations
Solution Approach 1:
The gate driving circuit is divided into multiple independent stages, each with its own set node and reset node controlled by dedicated controllers. This segmentation allows each stage to be independently stabilized, preventing malfunction propagation and improving overall reliability without requiring complex global control mechanisms.
Solution Approach 2:
The set node and reset node are proactively controlled by dedicated controllers before abnormal conditions occur. The set controller maintains the set node at a appropriate voltage level, and the reset controller manages the reset node voltage, preparing the circuit for potential abnormal on/off situations and preventing instability before it occurs.
2Stability of the object's composition
If dedicated controllers for set and reset nodes are added, then the stability of node voltages is improved, but the device complexity increases
Solution Approach 1:
The voltage control function is segmented into dedicated set controllers and reset controllers, each responsible for a specific node. This segmentation simplifies the control logic for each controller while achieving comprehensive voltage stability across all nodes, as each controller focuses on a single function rather than managing multiple nodes simultaneously.
Solution Approach 2:
The set controller and reset controller act as intermediary components between the power supply and the gate driving circuit nodes. These intermediaries regulate and stabilize the voltages before they reach the sensitive circuit nodes, protecting the main circuit from voltage fluctuations while maintaining a relatively simple overall structure.
Data Source
AI summary
Disclosed are a gate driving circuit and a display device including the same. The gate driving circuit includes a first controller configured to control the voltage of a set node, a second controller configured to control the voltage of a reset node, a first output transistor connected to the set node, and a second output transistor connected to the reset node.