Shift Register Pulse Output for Batch Scan Signal Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current driver circuits for display devices face challenges in reducing flicker on screens, decreasing data writing periods, and minimizing power consumption, particularly due to the sequential output of scan signals to multiple scan lines.
Innovation Solution
A pulse output circuit is designed with a specific configuration of transistors and control portions that allows for the simultaneous output of scan signals to multiple scan lines, utilizing high-potential and low-potential drive voltages to reduce data writing periods and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If scan signals are output sequentially to multiple scan lines, then the circuit operation is simple, but the data writing period becomes long and flicker occurs
Solution Approach 1:
The patent divides the scan signal output into multiple channels (first output terminal and second output terminal) that can operate simultaneously. The shift register is segmented to drive multiple scan lines in parallel, reducing the overall data writing period while maintaining manageable circuit complexity through modular design.
Solution Approach 2:
The patent combines multiple scan signal outputs into a single shift register structure that can simultaneously drive multiple scan lines. By merging the output functions and using shared control logic, the system achieves batch output without proportionally increasing circuit complexity.
2Device complexity
If scan signals are output sequentially to multiple scan lines, then the circuit design is simple, but power consumption increases
Solution Approach 1:
The patent segments the output stage into multiple independent output terminals, each capable of driving scan lines simultaneously. This segmentation allows for more efficient power utilization by activating only the necessary output channels, reducing overall power consumption while maintaining simple circuit design through modular architecture.
Solution Approach 2:
The patent implements batch output operation where scan signals are output in periodic batches to multiple scan lines simultaneously. This periodic batch operation reduces the duty cycle of active transistors compared to continuous sequential operation, thereby reducing power consumption while keeping the circuit design relatively simple.
3Device complexity
If sequential output of scan signals is used, then the circuit structure is simple, but flicker occurs on the screen
Solution Approach 1:
The patent segments the scan signal distribution into multiple parallel output paths, allowing simultaneous updating of multiple scan lines. This segmentation enables faster overall refresh rates that eliminate flicker, while the modular structure keeps the circuit design manageable and not excessively complex.
Solution Approach 2:
The patent implements continuous batch output of scan signals to multiple lines simultaneously, ensuring that the display is continuously refreshed without the gaps that cause flicker in sequential systems. This continuous operation maintains smooth display performance while the circuit structure remains relatively simple through efficient use of shared resources.
Data Source
AI summary
In a pulse output circuit in a shift register, a power source line which is connected to a transistor in an output portion connected to a pulse output circuit at the next stage is set to a low-potential drive voltage, and a power source line which is connected to a transistor in an output portion connected to a scan signal line is set to a variable potential drive voltage. The variable potential drive voltage is the low-potential drive voltage in a normal mode, and can be either a high-potential drive voltage or the low-potential drive voltage in a bath mode. In the batch mode, display scan signals can be output to a plurality of scan signal lines at the same timing in a batch.