Gate Drive Frequency-Division Control for Variable-Refresh Displays
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Solution Overview
Problem
In display panels with variable refresh rates, regions displaying static and dynamic content are driven using the same refresh rate, leading to resource waste.
Innovation Solution
A gate drive unit with frequency-division control modules and cascaded gate drive circuits that control signal transmission based on frequency-division control signals, allowing for region-partition frequency-division driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the same refresh rate is used to drive all display regions, then the display panel can maintain consistent performance across all regions, but resource waste occurs because static and dynamic regions are driven with the same refresh rate
Solution Approach 1:
The gate drive circuit is divided into multiple independent gate drive units, each capable of being controlled at different refresh rates. The display panel is segmented into multiple regions (first region and second region) that can be driven independently. This segmentation allows different refresh rates to be applied to different regions based on their content requirements, reducing overall power consumption while maintaining the ability to drive the entire panel when needed.
Solution Approach 2:
The gate drive circuit incorporates dynamic control capabilities through frequency-division control modules that can adjust refresh rates in real-time based on display content requirements. The circuit can dynamically switch between driving the first region at a first refresh rate and the second region at a second refresh rate, adapting to varying display needs without requiring a complete redesign of the drive architecture.
2Loss of energy
If frequency-division control modules are added to enable region-partition driving, then power consumption can be optimized by driving different regions at different refresh rates, but the gate drive circuit complexity increases
Solution Approach 1:
Multiple gate drive units are merged into a single integrated gate drive circuit that shares common functional modules including frequency-division control, clock signal generation, and power supply. This merging approach allows the system to achieve region-partition driving capabilities without proportionally increasing overall circuit complexity, as the shared modules serve multiple regions simultaneously.
Solution Approach 2:
The gate drive circuit is designed with universal frequency-division control modules that can control multiple gate drive units with a single control signal. The clock signal generation module and power supply module serve all gate drive units, making these components multi-functional. This universality reduces the need for separate control circuits for each region, thereby optimizing power consumption without excessive increases in circuit complexity.
Data Source
AI summary
A gate drive unit and a display device in which a plurality of cascaded gate drive circuits are electrically connected to a frequency-division control line configured to transmit a frequency-division control signal, so that a frequency-division control module in each gate drive circuit controls signal transmission between a first power supply terminal and a first node or a second node according to the frequency-division control signal, thereby controlling level states of gate control signals outputted by a first output module and a second output module.