Display Driving Circuit With Cascade Control for Regional Refresh Rates
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Solution Overview
Problem
Existing display driving circuits in display panels cannot support partitioned multi-frequency display, limiting the ability to switch between multiple refresh frequencies across different regions within a single screen, failing to meet diverse user demands.
Innovation Solution
A display driving circuit with a first scan driving circuit containing cascade control modules and signal transfer units that control the connection and transmission of scan signals between shift registers, allowing for partitioned multi-frequency display by adjusting the refresh frequency in different regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If full-screen switching frequency technology is used, then the display can switch refresh frequencies across the entire screen, but it cannot support partitioned multi-frequency display for different regions
Solution Approach 1:
The patent divides the scan driving circuit into multiple independent cascade control modules, each capable of controlling a specific region of the display. This segmentation allows different regions to operate at different refresh frequencies independently, enabling partitioned multi-frequency display while maintaining manageable circuit complexity through modular design
Solution Approach 2:
The patent introduces dynamic cascade control modules that can adjust the connection states between shift registers in real-time. This dynamic control enables the system to switch between different frequency modes for different regions based on real-time needs, providing adaptability without requiring a completely redesigned circuit for each mode
2Adaptability or versatility
If partitioned multi-frequency display is implemented, then real-time switching between frequencies across different regions is enabled, but the scan driving circuit becomes more complex
Solution Approach 1:
The cascade control module is designed as a universal building block that can function in multiple ways: it can enable or disable signal transmission between shift registers, it can control the timing of scan signals for different regions, and it can operate in different frequency modes. This multi-functionality reduces the need for separate dedicated circuits for each function, thereby managing complexity while achieving partitioned multi-frequency display
Solution Approach 2:
The cascade control module acts as an intermediary between the shift registers and the display regions. It mediates the scan signal transmission, controlling when and where signals are passed along the cascade chain. This intermediary function allows complex partitioned frequency control to be achieved through a single standardized module type rather than requiring multiple specialized circuits
Data Source
AI summary
The present application discloses a display driving circuit and a display device. The display driving circuit includes: a first scan driving circuit, including: a plurality of first shift registers arranged in cascade, and at least one first cascade control module. The first shift register includes a first register input terminal and a first register output terminal. The first cascade control module includes a first cascade control unit and a signal transfer unit, where the first cascade control unit is configured to control a connection state between a current-stage first register output terminal and a next-stage first register input terminal. An output terminal of the signal transfer unit is electrically connected to a next-stage first register input terminal; and the signal transfer unit is configured to transmit a start control signal to the next-stage first register input terminal in response to a transfer control signal.