Scan Driving Circuit for Region-Specific Display Refresh Control
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Solution Overview
Problem
Existing display panels in electronic devices have high power consumption due to uniform picture refresh rates across all image regions, which hinders endurance and user experience.
Innovation Solution
A display panel with a scan driving circuit comprising cascaded scan driving units, including shifting, gating logic, and output modules, allows for non-overlapping signal arrangements and selective control of pixel refresh rates across different regions, reducing signal terminals and facilitating a narrow bezel design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If uniform picture refresh rate is applied to all image regions, then display consistency is maintained, but power consumption increases
Solution Approach 1:
The display panel is divided into multiple image regions (first image region and second image region), each with independent refresh rate control. The scan driving circuit is segmented into multiple scan driving units that can operate at different frequencies, allowing region-specific power optimization without compromising overall display consistency.
Solution Approach 2:
Different refresh rates are assigned to different image regions based on their specific display requirements. The first image region operates at a first refresh rate while the second image region operates at a second refresh rate, enabling local optimization of power consumption according to actual display needs in each region.
2Use of energy by stationary object
If different refresh rates are implemented for different image regions, then power consumption is reduced, but signal synchronization becomes complex
Solution Approach 1:
The scan driving circuit uses periodic clock signals with different frequencies to control different image regions. The first clock signal drives the first image region at its refresh rate, while the second clock signal drives the second image region at its refresh rate, providing a systematic approach to managing multi-rate operation.
Solution Approach 2:
The scan driving units act as intermediary components between the clock signals and the display regions. Each scan driving unit receives clock signals and generates corresponding scan signals for its associated image region, mediating the complex synchronization requirements and simplifying the overall control architecture.
3Adaptability or versatility
If scan driving units are cascaded to control multiple regions, then refresh rate control is improved, but the number of signal terminals increases
Solution Approach 1:
Multiple scan driving units are cascaded together to form an integrated scan driving circuit. The output of one scan driving unit is connected to the input of the next, merging their functions into a unified system that can control multiple image regions with different refresh rates without requiring separate independent circuits for each region.
Solution Approach 2:
Each scan driving unit is designed with universal functionality to handle different clock frequencies and control different image regions. The scan driving units can operate independently or in cascade, and each unit can adapt to different refresh rate requirements, reducing the need for specialized components for each region.
Data Source
AI summary
A display panel and an electronic device. The display panel includes cascaded scan driving units. Each scan driving unit includes: a shifting module, configured to control a signal of a first node in response to a first level signal, a first clock signal, and a second clock signal; a gating logic module, configured to receive the first level signal and a second level signal, and control a signal of a second node in response to the signal of the first node and a region gating signal received by a region gating control terminal; and an output module, configured to receive the first level signal or the second level signal, and control a signal outputted by a driving signal output terminal in response to the signal of the second node.