Gate Driver Circuit for Multi-Frequency Display Region Driving
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Solution Overview
Problem
Existing gate drivers in display devices are unable to drive different regions of the panel at different frequencies, limiting multitasking capabilities and efficiency in displaying multiple content videos or applications on a single screen.
Innovation Solution
A gate driver with a plurality of signal transmission circuits connected via carry lines, each including an output circuit and a selection circuit, allows for independent control of gate signals to different regions, enabling different frequency driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a typical gate driver outputs gate signals sequentially without separate blocking structures, then the device complexity is reduced, but the adaptability to drive different regions at different frequencies is lost
Solution Approach 1:
The gate driver is divided into multiple independent signal transmission circuits, each capable of independently controlling gate signals for different regions. This segmentation allows each circuit to operate at different frequencies, enabling regional adaptability while maintaining manageable complexity through modular design
Solution Approach 2:
The gate driver incorporates dynamic control capabilities through selection circuits that can selectively activate or block signal transmission to different regions. This dynamic switching mechanism enables the system to adapt frequencies for different regions on demand, transforming a static sequential output structure into a dynamically configurable system
2Productivity
If all pixels are driven at a single frame frequency, then the device complexity is reduced, but the productivity for multitasking and displaying multiple content videos is limited
Solution Approach 1:
The display panel is divided into multiple regions, each with its own signal transmission circuit that can operate independently at different frequencies. This allows different content to be displayed at different refresh rates simultaneously, improving productivity for multitasking without requiring a monolithic control structure
Solution Approach 2:
Different regions of the display panel can have different driving frequencies tailored to their specific content requirements. High-frequency regions can display fast-moving content while low-frequency regions display static content, optimizing overall display efficiency and productivity without uniformly increasing complexity across the entire system
3Adaptability or versatility
If gate signals are output sequentially without selection circuits, then the ease of manufacture is improved, but the ability to selectively charge control nodes for regional control is lost
Solution Approach 1:
The gate driver is segmented into modular signal transmission circuits with standardized selection circuits. This modular approach enables selective regional control through repetitive, manufacturable units, reducing the impact of added complexity on ease of manufacture
Solution Approach 2:
The selection circuits are designed as universal components that can be replicated across multiple signal transmission circuits. This multi-functionality allows the same circuit design to provide selective control across different regions, improving adaptability while maintaining ease of manufacture through component standardization and reuse
Data Source
AI summary
In one or more examples, a gate driver includes signal transmission circuits dependently connected via carry lines. Each signal transmission circuit (i) is connected to a respective carry line to which a respective carry signal is applied from a respective previous signal transmission circuit and (ii) outputs a respective gate signal in response to a respective clock signal. An (n)th signal transmission circuit includes an output circuit for receiving an (n−1)th carry signal from a previous signal transmission circuit, an (n+1)th carry signal from a next signal transmission circuit, and a clock signal, and to charge or discharge a first control node and a second control node to output a gate signal, and a selection circuit for selectively charging the first control node so that the gate signal is output from the output circuit connected to a predetermined gate line. A display device including the gate driver is also disclosed.