Shift Register Unit Wiring Simplification in AMOLED Scanning Drive Circuits
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Solution Overview
Problem
The existing shift register units in AMOLED display apparatuses face issues with troublesome wiring, which complicates the operation of scanning drive circuits and affects the efficiency of light emission control signals.
Innovation Solution
A shift register unit is designed with an output end, node control end, first and second output node control circuits, and an output circuit, where the second node control circuit is connected to a clock signal line to control node signals and potentials, and the output circuit manages light-emitting control signals using voltage signals from multiple lines, simplifying wiring and improving signal control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a typical pixel compensation circuit is used in AMOLED display, then light emission control can be achieved, but the wiring becomes troublesome and complex
Solution Approach 1:
The shift register unit is divided into multiple functional modules: node control circuit, first output node control circuit, second output node control circuit, and output circuit. Each module handles specific control tasks independently, reducing overall wiring complexity while maintaining reliable light emission control.
Solution Approach 2:
The node control circuit receives clock signals and controls multiple nodes (first output node and second output node) through a unified control mechanism. The circuit structure serves multiple functions including signal buffering, level shifting, and coordinated control of multiple output nodes, thereby reducing the need for separate control lines.
2Ease of operation
If multiple control circuits are added to simplify wiring, then ease of operation improves, but device complexity increases
Solution Approach 1:
The first output node control circuit and second output node control circuit are merged into a coordinated control system where the node control circuit centrally manages both output nodes. This merging approach simplifies the control interface while the internal circuitry handles the complexity of coordinating multiple outputs.
Solution Approach 2:
The node control circuit acts as an intermediary between the clock signal input and the multiple output nodes. It receives the clock signal and mediates the distribution and coordination of control signals to both the first and second output nodes, simplifying the overall control architecture.
Data Source
AI summary
A shift register unit, a scanning drive circuit, a display substrate and a display device. The shift register unit includes an output end, a node control end, a first output node control circuit, a second node control circuit, a second output node control circuit and an output circuit, the second node control circuit is electrically connected to a first clock signal line, the node control end, the first output node and the second node; the first output node control circuit is electrically connected to the second node and the first output node and is configured to control a potential of the first output node; the second output node control circuit is electrically connected to the second node and the second output node; the output circuit is electrically connected to a first output node, a second output node, a first voltage line, a second voltage line and an output end.