Regional Gate Driver Layout for Variable Frame Rate Displays
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Solution Overview
Problem
Existing display devices face challenges in managing larger displays with multiple applications or content, requiring independent control of gate driving circuits for different screen regions, which leads to increased complexity and size of the control circuit.
Innovation Solution
The display device incorporates multiple gate drivers and level shifters connected to a timing controller, allowing for independent control of frame frequencies and pulse widths in different display regions, with source drive ICs and multiplexers to manage pixel data distribution efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple gate drivers are used to independently control different screen regions, then adaptability and control flexibility are improved, but device complexity increases
Solution Approach 1:
The display device divides the screen into multiple display regions (first display region, second display region, third display region) with different frame frequencies. Multiple gate drivers (first gate driver, second gate driver, third gate driver) are separately assigned to different regions, enabling independent control of each region's frame frequency. This segmentation allows the system to optimize power consumption and performance for different content types displayed in different regions.
Solution Approach 2:
The level shifters serve multiple functions: they convert clock signals from the timing controller to appropriate frequencies for different gate drivers, and they can be selectively connected to different gate drivers through multiplexers. The multiplexers themselves provide universal connectivity, allowing any level shifter to connect to any gate driver, providing flexible routing that reduces the need for dedicated control circuits for each region.
2Adaptability or versatility
If multiple gate drivers and level shifters are implemented, then control flexibility for different frame frequencies is improved, but the size of the control circuit increases
Solution Approach 1:
Multiple gate drivers are integrated directly into the display panel, merging the gate driving function with the display structure. Level shifters are positioned between the timing controller and gate drivers to share clock signal processing resources. Multiplexers combine multiple signal paths into fewer connections, reducing the overall circuit footprint while maintaining the capability to drive multiple regions at different frame frequencies.
Solution Approach 2:
Level shifters act as intermediary components between the timing controller and multiple gate drivers. They receive a single clock signal from the timing controller and generate appropriate clock signals for different gate drivers, mediating the control signals and reducing the need for separate control circuits for each region. This intermediary function allows efficient resource sharing while maintaining independent region control.
Data Source
AI summary
A display device includes a display panel including a plurality of gate drivers and a plurality of pixels disposed in a matrix form, a plurality of level shifters connected to the plurality of gate drivers, and a timing controller connected to the plurality of level shifters, wherein the plurality of gate drivers may be disposed between the plurality of pixels. The display device adjusts a frame frequency according to each divided driving region.