Shift Register With Selective Output For Display Power Reduction
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Solution Overview
Problem
As the resolution of display products increases, the power consumption of liquid crystal display panels also increases, leading to a decrease in standby time, necessitating a solution to reduce power consumption.
Innovation Solution
The addition of an output control unit, a second pull-up unit, a second pull-down unit, and a selection control signal terminal to the shift register, allowing for selective output of scan signals to gate lines, and the incorporation of switch devices and a mode switching circuit in the gate driving circuit to adjust display resolution and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of display products is increased, then the display quality is improved, but the power consumption increases
Solution Approach 1:
The shift register incorporates selectable output units that can dynamically switch between first output units (connected to all gate lines) and second output units (connected to only odd or even gate lines). This dynamic reconfiguration allows the system to adapt between high-resolution mode (all gate lines active) and low-power mode (half gate lines active), resolving the contradiction between display resolution and power consumption.
Solution Approach 2:
The invention changes the operational parameters of the shift register by introducing different output configurations. The first output units operate with all gate lines connected for high resolution, while the second output units operate with only odd or even gate lines connected for reduced power consumption. This parameter change enables flexible adjustment between resolution and power consumption based on actual display needs.
2Measurement precision
If the shift register outputs scan signals to all gate lines, then the display resolution is maintained, but the power consumption increases
Solution Approach 1:
The output units of the shift register are segmented into first output units and second output units. The first output units are responsible for driving all gate lines to maintain full display resolution, while the second output units are responsible for driving only odd or even gate lines to reduce power consumption. This segmentation allows selective activation of different output units based on power requirements.
Solution Approach 2:
The shift register is designed with multi-functional output units that can serve different purposes. The same shift register structure can operate in full-resolution mode using first output units or in power-saving mode using second output units. This universality allows the system to adapt to different operational requirements without requiring separate hardware configurations.
3Measurement precision
If the display panel operates in high resolution mode, then the image quality is improved, but the standby time decreases
Solution Approach 1:
The display system can periodically switch between high-resolution mode (using first output units) and power-saving mode (using second output units) based on actual display requirements. This periodic action between different operational states allows the system to maintain high image quality when needed while extending standby time during normal operation, effectively managing the trade-off between resolution and battery life.
Data Source
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AI summary
A shift register, a gate driving circuit, a display panel, a method for driving the display panel and a display device relate to a field of display technology. By aid of adding an output control unit, a second pull-up unit, a second pull-down unit and a selection control signal terminal on the basis of the shift register in the prior art, it can be controlled whether a scan signal should be outputted at a selection driving output terminal. In the gate driving circuit, through controlling the selection control signals applied on the selection control signal terminals, the scan signals can be outputted to a part of gate lines selectively. In the display panel provided in the embodiments of the present disclosure, besides the gate driving circuit, switch devices each of which is connected between third nodes of two shift registers, switch devices each of which is connected between fourth nodes of two shift registers and a mode switching circuit connected to the driving control circuit are incorporated. As such, the mode switching circuit can make the display panel display in different resolutions according to different mode control signals, such that the power consumption of the display panel can be reduced selectively to prolong standby time.