Shift Register Unit Circuit for Narrow Bezel Displays
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Solution Overview
Problem
Conventional gate drive circuits require a large number of shift register unit circuits to generate gate drive signals for high-resolution display panels, which occupies valuable space in thinner and lighter display devices, such as mobile phones and tablets, making it difficult to achieve a narrow screen bezel.
Innovation Solution
A shift register unit circuit design that includes a first node control circuit, a second node control circuit, and N output circuits, each connected to internal nodes, clock terminals, and output terminals, allowing for the generation of multiple gate drive signals from a single unit circuit, with specific transistor and capacitor configurations to manage potentials and clock signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional gate drive circuit uses one shift register unit circuit per row to generate gate drive signals, then each row can be driven reliably, but the number of shift register unit circuits increases with display resolution, occupying excessive bezel area
Solution Approach 1:
The shift register unit circuit is divided into multiple independent output circuits (first output circuit, second output circuit, etc.), each capable of generating gate drive signals for different rows. This segmentation allows a single unit circuit to serve multiple rows simultaneously, reducing the total number of unit circuits needed and thereby decreasing bezel area occupation.
Solution Approach 2:
Each shift register unit circuit is designed to perform multiple functions by generating gate drive signals for multiple rows through its multiple output circuits. The unit circuit responds to clock signals and control signals to produce multiple independent gate drive outputs, making it a multi-functional component that replaces what would traditionally require multiple separate unit circuits.
2Area of stationary object
If multiple output circuits are integrated into a single shift register unit circuit, then the number of unit circuits is reduced and bezel area is minimized, but the circuit complexity within each unit increases
Solution Approach 1:
The internal circuitry of the shift register unit is segmented into distinct output circuits, each with its own set of transistors and capacitors. This modular segmentation organizes the complexity into manageable, repeatable units rather than a monolithic complex circuit, making the design more systematic and easier to implement despite the increased functionality.
Solution Approach 2:
Multiple output circuits are merged within a single shift register unit circuit structure, sharing common control inputs and clock signals while maintaining independent output capabilities. This merging reduces the overall number of separate components needed in the gate drive system, consolidating functionality into fewer physical locations and reducing bezel area.
Data Source
AI summary
A shift register unit circuit is disclosed that includes a first node control circuit, a second node control circuit, and a plurality of output circuits. Each of the plurality of output circuits is connected to a respective output terminal and provides a gate drive signal to the respective output terminal. Also disclosed are a method of driving the shift register unit circuit, a gate drive circuit, and a display apparatus.