Gate Driver Unit Node Segmentation to Reduce Signal Voltage Drop
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Solution Overview
Problem
In gate driver circuits, significant voltage drops occur in gate control signals due to excessive coupling and load, leading to issues like horizontal crosstalk, display unevenness, and deterioration in variable refresh frequency mode.
Innovation Solution
The gate driver unit includes a first node control module, an output control module, and a second output module, which are electrically connected to specific nodes of preceding stages, reducing the load on the gate driver circuits and minimizing the number of circuits controlled by a single gate control signal, thereby reducing voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the gate driver circuit uses CMOS design technology to output high level signals and low level signals, then the gate driver circuit can drive the display panel, but serious coupling occurs and the voltage drop of the gate control signal becomes large
Solution Approach 1:
The invention segments the gate driver circuit into multiple independent control modules (first node control module, output control module, second output module) that separately control different nodes. This segmentation reduces the coupling between nodes and allows independent optimization of each module's output, thereby reducing voltage drops while maintaining driving capability.
Solution Approach 2:
The invention implements dynamic control of node potentials through clock signals. The control modules dynamically adjust the potentials of first and second nodes based on timing requirements, enabling the circuit to adaptively manage signal levels and reduce voltage drops during different operation phases while maintaining adequate driving power.
2Adaptability or versatility
If the gate driver circuit outputs gate control signals to multiple circuits, then the coverage is comprehensive, but the load on the gate driver circuit increases and voltage drops occur
Solution Approach 1:
The invention divides the gate control signal output into multiple independent output modules (first output module, second output module), where each module drives a specific subset of circuits. This segmentation reduces the total load on each individual output module while maintaining comprehensive coverage across all required circuits.
Solution Approach 2:
The invention introduces intermediate control nodes (first node, second node, third node) that act as mediators between the power supply and the final output terminals. These intermediate nodes buffer the signal transmission, reducing direct loading effects and minimizing voltage drops while enabling signals to reach multiple destinations.
3Ease of operation
If the gate driver circuit connects control modules to multiple output terminals, then the control capability is enhanced, but the load on the control modules increases
Solution Approach 1:
The invention segments the control function across multiple specialized modules (first node control module for controlling first node, output control module for controlling output connections, second output module for second output terminal). Each module has a dedicated function and controls a limited set of outputs, reducing the complexity and load on individual control modules while maintaining overall control capability.
Data Source
AI summary
The present application provides a gate driver unit and a display panel, in which at least one of a first node control module and an output control module in a gate driver circuit at present stage is electrically connected to a second node of a gate drive circuit at a preceding stage, so as to ameliorate a problem that a voltage drop of a first gate control signal output by the gate drive circuit is large.