Shift Register Unit With Control Module For Bezel Narrowing
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Solution Overview
Problem
Existing gate driving circuits in display devices face challenges in maintaining operation stability of shift register units, which affects the display quality and bezel narrowing in high-resolution displays.
Innovation Solution
A shift register unit comprising an input module, output module, reset module, and control module, connected through various transistors and capacitors, is designed to control node levels and generate reset trigger signals based on clock signal relationships, enhancing stability and enabling bezel narrowing by cascading these units in a gate driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If GOA technology is employed to integrate gate driving circuit on array substrate, then bezel narrowing is realized, but operation stability of shift register unit deteriorates
Solution Approach 1:
The patent applies preliminary action by introducing a reset module that proactively resets the first node to a second level before potential instability occurs. The control module generates reset trigger signals in advance based on clock signal relationships, ensuring the shift register unit is in a known stable state before each operation cycle, thereby preventing operational instability without compromising the integrated GOA design
Solution Approach 2:
The patent implements feedback through the control module that monitors clock signal relationships and generates reset trigger signals based on the relative level relations among clock signals. This feedback mechanism dynamically adjusts the reset timing to maintain stable operation of the shift register unit while preserving the bezel narrowing benefit of GOA integration
2Measurement precision
If shift register unit operates in GOA integrated circuit, then display resolution is maintained, but operation stability deteriorates
Solution Approach 1:
The reset module performs preliminary resetting of the first node before each scan pulse output cycle, ensuring the shift register unit starts from a known stable state. This preliminary action prevents operational instability that would otherwise compromise display quality, while maintaining the high resolution capability enabled by GOA integration
Solution Approach 2:
The control module uses feedback from clock signal relationships to generate precise reset trigger signals. This feedback mechanism ensures stable operation of the shift register unit during high-resolution display operations, preventing errors that would degrade display quality while preserving the resolution benefits of integrated gate driving
Data Source
AI summary
The present disclosure relates to a shift register unit and driving method thereof, a gate driving circuit and a display device. The shift register unit comprises: an input module for controlling a level of a first node based on a scan pulse, an output module for controlling a scan pulse output based on the level of the first node, a reset module for resetting the first node and the scan pulse output, and a control module for generating a reset trigger signal, wherein the reset module further resets the first node based on the reset trigger signal. The shift register units can be cascaded to form a gate driving circuit to realize output of multiple scan pulses. By integrating such a gate driving circuit on the array substrate, area of the bezel region of the array substrate can be reduced, thereby facilitating bezel narrowing of a display device. At the same time, due to presence of the control module, the reset module is enabled to reset the first node more stably while normal output of the scan pulse is maintained.