Gate Driving Circuit Leakage Current Stabilization
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Solution Overview
Problem
Existing gate driving circuits in display devices face challenges in stabilizing voltage levels and efficiently outputting gate signals, leading to instability and potential errors in pixel control.
Innovation Solution
A gate driving circuit with a node controller that includes stabilization transistors and capacitors to control voltage levels between nodes, along with pull-up and pull-down transistors and capacitors to output gate and carry signals, ensuring stable voltage levels and reduced leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gate driving circuits are used, then the circuit structure is simple, but the voltage levels are unstable and leakage currents occur
Solution Approach 1:
The gate driving circuit is divided into multiple stages, with each stage independently controlling voltage levels between nodes. This segmentation allows each stage to stabilize voltages locally, improving overall reliability while keeping individual stage complexity manageable
Solution Approach 2:
Capacitors are introduced as intermediary elements between transistors to maintain voltage levels and reduce leakage currents. These capacitors act as mediators that store charge and stabilize voltages without requiring complex control circuits
2Reliability
If voltage levels are not stabilized, then the circuit operation is fast, but gate signals are unstable and pixel control errors occur
Solution Approach 1:
Capacitors are pre-charged to specific voltage levels before signal transmission. This preliminary action ensures that when gate signals are output, the voltage levels are already stabilized, preventing control errors while maintaining fast signal propagation
Solution Approach 2:
The circuit dynamically adjusts voltage levels at different nodes using controlled transistor switching. By changing voltage parameters at intermediate nodes, the circuit ensures stable gate signal output without sacrificing transmission speed
Data Source
AI summary
A gate driving circuit from which stable gate signals may be output by minimizing a leakage current of turned-off transistors in case that pull-down transistors output a gate signal and a carry signal of a low-level voltage. Some transistors in the gate driving circuit include two transistors in series to reduce leakage current in an off state, and capacitors are further included to reduce leakage current. Therefore voltages at nodes can be better controlled, and so that the output gate and carry voltages can be stably controlled.