Shift Register Coupling Module for Fast Reset
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shift register units in display devices face challenges in reducing reset time without increasing the area of the shift register unit, which hinders the enhancement of display resolution and frame narrowness.
Innovation Solution
The proposed shift register unit incorporates a coupling module that utilizes voltage coupling to control the pull-up signal at the pull-up node, allowing for faster reset of the output end by raising and lowering the pull-up voltage through control signals, thereby reducing reset time without enlarging the transistor area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the area of the output reset transistor T4 is enlarged to reduce reset time, then the reset time is reduced, but the display resolution and frame narrowness deteriorate
Solution Approach 1:
The patent applies preliminary action by raising the pull-up node voltage to a higher level (second high voltage) before the reset operation begins. This pre-conditioning of the voltage state enables the output transistor to discharge the output node faster during reset, reducing reset time without requiring a larger transistor area that would compromise display resolution.
Solution Approach 2:
The patent implements dynamics by making the pull-up node voltage variable rather than fixed. The voltage dynamically transitions between a first high voltage level during normal operation and a second higher voltage level during reset preparation. This dynamic voltage adjustment optimizes the reset speed while maintaining compact transistor dimensions suitable for high-resolution displays.
2Loss of time
If the area of the output reset transistor T4 is enlarged to reduce reset time, then the reset time is reduced, but the frame width increases
Solution Approach 1:
By pre-raising the pull-up node voltage to a higher level before reset operation, the patent creates favorable conditions for rapid discharge without requiring additional transistor area. This preliminary voltage preparation enables fast reset within the constrained frame width of modern display devices.
Solution Approach 2:
The patent changes the voltage parameter of the pull-up node dynamically, switching between two distinct voltage levels. This parameter change approach achieves faster reset performance without increasing the physical dimensions of the transistor, thereby maintaining narrow frame width while reducing reset time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables faster reset of the output end, enhancing display resolution and narrowing the frame by efficiently managing the pull-up node voltage, thus addressing the limitations of previous designs.
Implementation Method 1
a coupling module 53, a first end of the coupling module 53 is connected with a second control signal end CON2, a second end of the coupling module 53 is connected with the pull-up node PU, the coupling module 53 is configured to control the pull-up signal at the pull-up node PU according to a second control signal of the second control signal end CON2 by way of voltage coupling
Data Source
Figure 1~2
Figure 3~4
Figure 5~6B
AI summary
Disclosed are a shift register unit, an operation method therefor and a shift register comprising the shift register unit. The shift register unit comprises: an input module configured to transmit a received input signal to a pull-up node; an output module configured to output a first control signal of a first control signal end to an output end when a pull-up signal at the pull-up node is at an effective pull-up level; and a coupling module, wherein the first end thereof is connected to a second control signal end, the second end thereof is connected to the pull-up node, and the coupling module is configured to control the pull-up signal at the pull-up node in a voltage coupling manner according to a second control signal of the second control signal end. By further pulling up the voltage at the pull-up node when an output end is reset, the speed of resetting the output end can be increased.