Gate Driving Circuit Voltage Stabilizing Module
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Solution Overview
Problem
The stability of the potential at pull-down nodes in gate driving circuits is unstable, affecting the reliability of the circuit's operation.
Innovation Solution
A gate driving circuit is designed with a voltage stabilizing module that includes leakage control units and voltage stabilizing units to reduce leakage current and maintain the potential of pull-down nodes, connected to both pull-up and pull-down control modules to control node potentials and output driving signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gate driving circuit is used without voltage stabilizing module, then the circuit structure is simpler, but the potential stability of pull-down node deteriorates due to leakage current
Solution Approach 1:
The patent introduces a voltage stabilizing module as an intermediary component between the pull-down node and ground. This module includes a stabilizing transistor that acts as a mediator to actively counteract leakage current effects by providing a controlled discharge path, thereby stabilizing the pull-down node potential without fundamentally altering the core gate driving circuit architecture
Solution Approach 2:
The voltage stabilizing module operates autonomously to maintain pull-down node stability. The stabilizing transistor automatically activates when the pull-down node potential rises due to leakage current, creating a self-regulating mechanism that continuously compensates for leakage effects without requiring external control signals or additional complex control logic
2Reliability
If voltage stabilizing module is added to reduce leakage current, then the potential stability improves, but the device complexity increases
Solution Approach 1:
The patent merges the voltage stabilizing function with the existing pull-down control structure by sharing control signals and integrating the stabilizing transistor into the existing circuit node framework. The stabilizing module utilizes the same control envelope as the pull-down module, combining multiple functions into a unified structure that reduces overall system complexity despite adding stabilization capability
Solution Approach 2:
The voltage stabilizing module is designed with multi-functionality, serving both as a leakage current compensator and as an additional pull-down mechanism. The stabilizing transistor can operate in different modes depending on circuit conditions, providing both stabilization during idle periods and active pull-down during switching operations, thereby replacing what would otherwise require separate dedicated circuits
3Reliability
If voltage stabilizing module is added to maintain pull-down node level, then the reliability enhances, but the frame space of display panel increases
Solution Approach 1:
The patent implements the voltage stabilizing module using thin-film transistor technology, where the stabilizing transistor is fabricated as a thin-film device integrated into the existing thin-film transistor array. This approach minimizes the vertical profile and lateral footprint of the stabilizing component, allowing it to be accommodated within the existing pixel structure without significantly increasing the overall display panel frame space
Data Source
AI summary
The present application provides a gate driving circuit, a driving method, and a display panel. The gate driving circuit includes a pull-up control module, a pull-up module, a pull-down control module, a pull-down module, and a voltage stabilizing module. The pull-down node and the pull-up control module are connected to the voltage stabilizing module, which is not only reduce a leakage current of the pull-down node in the high potential state to stabilize the high potential of the pull-down node, but also maintain the level of the pull-down node in the low potential state to stabilize the low potential of the pull-down node.