Shift Register Unit Reducing Signal Lines and TFTs in Gate Driving Circuits
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Solution Overview
Problem
Existing gate driving circuits for liquid crystal displays (LCDs) have a high number of signal lines and thin-film transistors (TFTs), increasing space occupation and product cost due to the integration of a gate switching circuit on the array substrate.
Innovation Solution
A shift register unit with a pull-up module, control module, and reset module is designed to reduce the number of signal lines and TFTs, featuring a configuration where the present-stage output of each shift register unit is connected to the signal input of the adjacent unit, reducing space and cost while maintaining signal stability through transistor control and capacitor charging/discharging mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a gate switching circuit based thin film transistor (TFT) is integrated on an array substrate of a display panel, then the product cost can be reduced and the display panel may have symmetrical edges and aesthetically narrowed frames, but the space occupied by the gate driving circuit is increased
Solution Approach 1:
The gate driving circuit is divided into multiple shift register units, each handling a portion of the scanning lines. This segmentation allows for more efficient space utilization while maintaining the integrated GOA architecture benefits.
Solution Approach 2:
Multiple functional modules (pull-up module, control module, reset module) are merged into a compact shift register unit structure, reducing the overall space occupation while maintaining all necessary functions for gate driving operation.
2Reliability
If a large number of signal lines and TFTs are integrated in existing shift register unit, then the gate switching circuit can be fully functional, but the space occupied by the gate driving circuit is increased
Solution Approach 1:
The patent extracts and eliminates redundant signal lines and TFTs from the shift register unit while retaining only the essential components needed for proper gate driving functionality. This optimization reduces space without compromising circuit reliability.
Solution Approach 2:
The circuit design optimizes the parameters of remaining TFTs and signal lines to achieve higher efficiency and lower space requirements, while maintaining the necessary functional performance through careful parameter selection and optimization.
Data Source
AI summary
A shift register unit, a gate driving circuit, and a display device are disclosed. The shift register unit comprising: a pull-up module for pulling up level signal at present-stage signal output based on a signal at a pull-up control node and a first clock input; a control module connected to a first voltage terminal and a second voltage terminal for controlling the level at the pull-up control node based on a signal inputted to a first signal input and a second clock input; and a reset module for resetting the level signal outputted from the present-stage signal output based on a signal inputted to a second signal input. Signal lines and TFTs integrated in the shift register unit may be reduced, thereby saving space occupied by the circuit and reducing product cost.