Light Emission Control Shift Register for OLED Gate Driving
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Solution Overview
Problem
Current display technologies face challenges in efficiently integrating gate driving circuits on array substrates, leading to increased production costs and manufacturing complexity, particularly in achieving precise control over light emission in display devices like OLEDs.
Innovation Solution
A light emission control shift register is designed with multiple control circuits and transistors, connected through specific voltage and clock signal terminals, allowing for precise control over voltage transmission and signal output, enabling efficient light emission control in display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If gate driving circuits are integrated on array substrate using GOA technology, then production cost and manufacturing difficulty are reduced, but control precision over light emission deteriorates
Solution Approach 1:
The shift register circuit is divided into multiple stages, with each stage containing independent control circuits (first control circuit 51, second control circuit 61, third control circuit 71, fourth control circuit 81). Each control circuit can independently control voltage transmission to different nodes (N2, N3, N4, output terminal), enabling precise control over light emission timing and duration for each pixel row while maintaining integrated circuit architecture.
2Manufacturing precision
If multiple control circuits are added for precise light emission control, then control precision improves, but device complexity increases
Solution Approach 1:
Multiple control circuits (first control circuit 51, second control circuit 61, third control circuit 71, fourth control circuit 81) are merged into a single shift register stage, sharing common input node N1 and clock signal terminals (CK1, CK2, CK3). This integration achieves precise multi-stage control over light emission while avoiding the complexity of separate circuits for each control function.
Solution Approach 2:
The control circuits perform multiple functions: the first control circuit controls voltage transmission to node N2, the second to node N3, the third to node N4, and the fourth to the output terminal. Each control circuit can also respond to different clock signals (CK1, CK2, CK3) and voltage terminals (VGH, VGL), enabling universal control over different aspects of pixel operation from a single stage.
3Manufacturing precision
If more wiring is used for precise control signals, then control precision improves, but wiring space increases
Solution Approach 1:
The patent utilizes multiple voltage terminals (VGH, VGL) and multiple clock signal terminals (CK1, CK2, CK3) as additional control dimensions. Instead of using more wiring connections, the invention controls the same physical wires to transmit different voltages and signals at different time stages, achieving precise control without increasing wiring space.
Data Source
AI summary
Embodiments of the present disclosure provide a light emission control shift register and method thereof, a gate driving circuit, and a display device. An input circuit outputs a signal of a signal input terminal to a first node. A first control circuit outputs a voltage of a first voltage terminal to a second node. A second control circuit transmits the voltage of the first voltage terminal to a third node. A third control circuit transmits the voltage of the first voltage terminal to a fourth node, and the third control circuit can further transmit the voltage of the second voltage terminal to the fourth node. A fourth control circuit transmits the voltage of the first voltage terminal to a signal output terminal, and the fourth control circuit can further transmit the voltage of the second voltage terminal to the signal output terminal.