Shift Register Multi-Pulse Output for Multi-Area Display Panels
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Solution Overview
Problem
Current shift register units cannot support the output of multiple pulses required for multi-area multi-frequency display technology, leading to issues such as flickering and image sticking, which affect the display effect.
Innovation Solution
A display panel with N cascaded shift register units, each comprising a driving unit, an output unit, a first control unit, and a second control unit, is designed to output n valid pulses, where n≥2, allowing for the shift register unit to support multi-pulse output and meet the requirements of multi-area multi-frequency display technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the refresh frequency is increased to improve display quality, then the display effect is improved, but the power consumption increases
Solution Approach 1:
The patent divides the display screen into multiple areas (first display area and second display area) with different refresh rates. The first shift register outputs multiple pulses to drive the first display area at a higher refresh rate, while the second shift register drives the second display area at a lower refresh rate. This local differentiation allows each area to have optimized display quality and power consumption according to its specific requirements, resolving the contradiction between overall display effect and power consumption.
2Adaptability or versatility
If the shift register unit is designed to output multiple pulses to support multi-area multi-frequency display, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent divides the shift register into multiple independent shift register units (first shift register and second shift register), where each unit can independently output pulses. The first shift register unit is configured to output multiple pulses for high-refresh-rate areas, while the second shift register unit outputs single pulses for low-refresh-rate areas. This segmentation allows each unit to be optimized for its specific function, achieving multi-pulse output capability without requiring complete redesign of the entire shift register system.
Solution Approach 2:
The shift register units are designed with universal functionality to support both single-pulse and multi-pulse output modes. By configuring the first shift register to output multiple pulses and the second shift register to output single pulses, the system achieves adaptability to different display areas with different refresh rate requirements, making the shift register structure versatile for various display scenarios.
Data Source
AI summary
A display panel includes a plurality of cascaded shift register units, where a shift register unit includes a driving unit, an output unit, a first control unit and a second control unit. The driving unit has a signal shifting function. The output unit is connected to an output of the driving unit, an output of the first control unit and an output of the second control unit respectively. A first output signal includes n valid pulses. In a first working mode of the shift register unit, the output unit is configured to receive at least the first output signal, a first control signal output by the first control unit and a second control signal output by the second control unit, and output a second output signal. The second output signal includes n valid pulses, where n is a positive integer not less than 2.