AMOLED Shift Register Driving Circuit With Independent Voltage Terminals
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Solution Overview
Problem
Existing AMOLED display devices face challenges in flexibly setting the potential of each node in shift register units, which limits their performance and efficiency.
Innovation Solution
The proposed driving circuit includes a first node control circuit, a second node control circuit, and a first output circuit, which are electrically connected to different low and high voltage input terminals. These circuits control the connection of nodes and voltage terminals under the control of low voltage signals, clock signals, and node potentials, allowing for flexible voltage settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the same voltage input terminal is used in shift register units, then the circuit structure is simple, but the potential of each node cannot be flexibly set
Solution Approach 1:
The voltage input terminal is divided into multiple independent voltage input terminals (first voltage input terminal, second voltage input terminal, third voltage input terminal, fourth voltage input terminal), each capable of providing different voltage levels. This segmentation allows each node in the shift register unit to be independently controlled with different potentials, resolving the contradiction between structural simplicity and node potential flexibility.
2Ease of operation
If multiple independent voltage input terminals are used, then node potential control is flexible, but the circuit structure becomes complex
Solution Approach 1:
Different voltage input terminals are assigned to control different nodes based on their specific functional requirements. The first voltage input terminal controls the first node, the second voltage input terminal controls the second node, and so on. This localized voltage control approach enables precise potential setting for each node while maintaining a systematic and organized circuit structure, balancing operational flexibility with structural complexity.
Data Source
AI summary
A driving circuit includes a first node control circuit, a second node control circuit and a first output circuit; the second node control circuit is configured to control to connect the first node and the second node under the control of a low voltage signal provided by the first low voltage input terminal; the first node control circuit is configured to control to connect the first node and the second low voltage input terminal under the control of a first clock signal provided by the first clock signal line; the first output circuit is configured to control to connect the driving signal output terminal and the third low voltage input terminal under the control of a potential of the pull-down node; at least two of the first low voltage input terminal, the second low voltage input terminal and the third low voltage input terminal are different from each other.