Shift Register Self-Reset Circuit for Narrow Bezel Displays
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Solution Overview
Problem
Current gate driving circuits in flat panel displays face challenges with increased area and power consumption due to the need for cascaded shift registers, which hinders the realization of narrow bezels and efficient pixel charging.
Innovation Solution
The shift register design incorporates self-reset functionality, reducing the need for external reset signals and minimizing the number of signal lines and transistors, thereby simplifying the circuit structure and layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cascaded shift registers are used in gate driving circuits, then pixel driving capability is improved, but area and power consumption increase
Solution Approach 1:
The patent combines the reset function with the shift register circuit by using the output signal of each stage to automatically reset the next stage. This merging of functions eliminates the need for separate reset signal lines and external reset circuits, thereby reducing the overall circuit area while maintaining the pixel driving capability.
Solution Approach 2:
The output signal of each shift register stage serves dual purposes: it drives the corresponding pixel row and simultaneously acts as the reset signal for the next stage. This multi-functionality reduces the number of dedicated signal lines needed, thereby reducing circuit area and complexity.
2Productivity
If cascaded shift registers are used in gate driving circuits, then pixel driving capability is improved, but power consumption increases
Solution Approach 1:
The patent merges the reset function into the main shift register operation, eliminating the need for separate reset signal generation and transmission. This reduces the number of active circuit elements and signal lines, thereby reducing overall power consumption while maintaining pixel driving capability.
Solution Approach 2:
Each shift register stage automatically resets the next stage using its own output signal, without requiring external reset signals or additional control circuits. This self-service mechanism reduces the power consumption associated with external reset signal generation and transmission.
3Reliability
If external reset signals are used, then shift register operation is controlled, but circuit complexity and signal line count increase
Solution Approach 1:
The patent combines the reset function with the shift register output function, so that the same signal line serves both purposes. This merging eliminates the need for separate reset signal lines and external reset control circuits, thereby simplifying the circuit structure while maintaining reliable operation control.
Solution Approach 2:
The output signal of each shift register stage universally serves as both the pixel drive signal and the reset signal for the next stage. This multi-functionality reduces the number of dedicated signal lines and control circuits needed, simplifying the overall circuit structure.
Data Source
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AI summary
The present application provides a shift register and a method of driving the same, and a gate driving circuit. In the shift register, an input sub-circuit is configured to output an input signal to a pull-up node under control of a first clock signal of a first clock signal terminal, an output sub-circuit is configured to output a second clock signal of a second clock signal terminal to the output terminal under control of a voltage level of the pull-up node, a reset sub-circuit is configured to reset voltage levels of the pull-up node and the output terminal under control of a voltage level of a pull-down node, and a reset control sub-circuit is configured to control the voltage level of the pull-down node such that the voltage levels of the pull-up node and the output terminal are reset to a level signal.