Shift Register Circuit for Narrow Bezel Displays
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Solution Overview
Problem
The increasing demand for high-definition and narrow bezel display apparatuses requires a shift register that can efficiently scan a larger number of pixels within a fixed screen size, necessitating a more compact and high-resolution gate driving circuit design.
Innovation Solution
A shift register comprising an input circuit, an output circuit, and a control circuit, connected to a control node, with specific transistor and capacitor configurations that reduce the number of signal lines and transistors, allowing for a simple structure that facilitates high-resolution and narrow bezel displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of pixels to be scanned is increased for high-definition displays, then the scanning capability is improved, but the area occupied by the gate driving circuit increases
Solution Approach 1:
The patent combines multiple functions into the shift register circuit by integrating the input circuit, output circuit, and control circuit into a single unified structure. This merging of functions reduces the overall area occupied by the gate driving circuit while maintaining the capability to scan a larger number of pixels for high-definition displays.
Solution Approach 2:
The shift register is designed with multi-functionality, where the same circuit structure performs multiple operations including signal input, signal output, and control operations. This universal design allows the gate driving circuit to handle increased pixel scanning requirements without proportionally increasing the circuit area.
2Area of stationary object
If the number of transistors and signal lines is reduced for compact layout, then the area occupied by the shift register is reduced, but the control precision and noise reduction may be compromised
Solution Approach 1:
The patent extracts and separates the control function into a dedicated control circuit that operates independently but integrates with the input and output circuits. This extraction allows for simplified overall layout reducing area, while the dedicated control circuit maintains precise control signals and reduces noise through proper signal separation and timing control.
Data Source
AI summary
Provided is a shift register, comprising an input circuit, an output circuit, and a control circuit, which are electrically connected to a control node. The input circuit is electrically connected with a signal input terminal of the shift register, and is configured to input an input signal provided by the signal input terminal to the control node. The control circuit is electrically connected with a working power supply terminal, and is configured to input an operation voltage provided by the working power supply terminal to the control node. The output circuit is electrically connected with a signal output terminal of the shift register and a clock signal line, and is configured to input one of a voltage of the control node and the first clock signal provided by the clock signal line to the signal output terminal.