Gate Driving Circuit Frequency Division for Variable Refresh Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels face inefficiencies in power consumption due to uniform refresh frequencies across different display areas with varying content switching frequencies, hindering optimal power management.
Innovation Solution
A gate driving unit with a frequency division control line and cascaded gate driving circuits, incorporating stage transmission and frequency division control modules to adjust refresh frequencies based on display area requirements, enabling independent control of sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If uniform refresh frequency is applied across all display areas, then display consistency is maintained, but power consumption increases due to unnecessary high-frequency updates in static display areas
Solution Approach 1:
The display panel is divided into multiple display areas (first display area and second display area) with different refresh frequency requirements. The gate driving circuit is correspondingly segmented into multiple gate driving circuits, each capable of independent frequency control. This segmentation allows static display areas to operate at lower frequencies while dynamic areas maintain higher frequencies, reducing overall power consumption without compromising display quality where needed.
Solution Approach 2:
The system implements dynamic frequency adjustment by introducing a frequency division control signal that can dynamically switch between different refresh frequencies (first refresh frequency and second refresh frequency) for different display areas. This dynamic control allows the display system to adapt to varying content requirements in real-time, optimizing power consumption based on actual display needs rather than maintaining a uniform static frequency across all areas.
2Use of energy by stationary object
If different refresh frequencies are applied to different display areas, then power consumption is reduced, but system complexity increases due to multiple gate driving circuits and frequency division control
Solution Approach 1:
Multiple gate driving circuits are merged into a unified architecture that shares common control resources. The frequency division control line and control signals are distributed to multiple gate driving circuits, allowing them to operate at different frequencies while being managed through a centralized control mechanism. This merging approach reduces the overall system complexity compared to having completely independent control systems for each display area.
Solution Approach 2:
The gate driving circuits are designed with multi-functionality, capable of operating at multiple refresh frequencies (first refresh frequency and second refresh frequency) based on the frequency division control signal. This universal design allows a single gate driving circuit architecture to serve multiple display areas with different frequency requirements, eliminating the need for entirely separate control systems and thereby reducing overall device complexity.
3Illumination intensity
If high refresh frequency is used throughout the display panel, then dynamic display quality is improved, but power consumption increases due to continuous high-frequency updates in all areas
Solution Approach 1:
Different display areas are assigned different quality levels appropriate to their content requirements. The first display area (requiring dynamic display) receives high refresh frequency for superior display quality, while the second display area (requiring static display) operates at lower frequency. This local quality differentiation ensures that high display quality is provided only where necessary, reducing power consumption in areas where high quality is not needed.
Solution Approach 2:
The system implements periodic action by applying high refresh frequency only during periods when dynamic content is displayed in specific areas, while using lower refresh frequencies during periods when static content is displayed. The frequency division control signal enables this periodic switching between different frequency regimes, allowing the display to maintain high quality when needed while conserving energy during static display periods.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The present application provides a gate driving unit and a display device, where the gate driving unit includes a plurality of gate driving circuits and a frequency division control line for transmitting a frequency division control signal to the plurality of gate driving circuits. Each of the gate driving circuits includes a frequency division control module, an output module and a frequency division control module, where the frequency division control module controls signal transmission between the output module and one of a first node and a second node according to a frequency division control signal and a signal from the first node or the second node of the frequency division control module.