Shift Register Unit for Dual Gate Driving Signals
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Solution Overview
Problem
The redundancy in circuit structure and signal wirings within gate driving circuits for OLED displays leads to unnecessary expansion of layout space and increased manufacturing costs.
Innovation Solution
A shift register unit is designed with a shift register module, first and second input modules, and an output module, utilizing opposite phase clock signals to simplify the circuit structure, allowing two gate driving signals to be outputted from a single shift register unit, thereby reducing layout space and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one shift register unit is used to output one gate driving signal, then the gate driving signal can be provided as required, but the circuit structure and signal wiring become redundant, resulting in expansion of layout space and increase of manufacturing cost
Solution Approach 1:
The shift register unit is designed to perform multiple functions: it can output both a first gate driving signal (EN) and a second gate driving signal (EM_OUT) simultaneously. The unit includes a shift register module for signal delay, a first input module for setting node voltage levels, and an output module for generating both output signals, enabling one unit to replace what would traditionally require two separate units
Solution Approach 2:
The patent combines the functionality of two separate shift register units into a single integrated unit. The circuit merges the signal processing paths by using shared components (such as the shift register module and common wiring) while maintaining distinct output paths for the two gate driving signals, thereby reducing overall circuit redundancy and layout space
2Productivity
If one shift register unit is used to output one gate driving signal, then the gate driving signal can be provided as required, but the layout space expands and manufacturing cost increases
Solution Approach 1:
The shift register unit is designed to perform multiple functions: it can output both a first gate driving signal (EN) and a second gate driving signal (EM_OUT) simultaneously. The unit includes a shift register module for signal delay, a first input module for setting node voltage levels, and an output module for generating both output signals, enabling one unit to replace what would traditionally require two separate units
Solution Approach 2:
The patent combines the functionality of two separate shift register units into a single integrated unit. The circuit merges the signal processing paths by using shared components (such as the shift register module and common wiring) while maintaining distinct output paths for the two gate driving signals, thereby reducing overall circuit redundancy and layout space
Data Source
AI summary
There is disclosed a shift register unit, a gate driving circuit and a display device. The shift register unit includes a shift register module configured to delay a phase of a signal from the input terminal, and output the delayed signal at the first output terminal; a first input module configured to set the first node to be at a second voltage level; a second input module configured to set the first node to be at the first voltage level, and apply the signal from the input terminal to the first node; and an output module configured to set the second output terminal to be at the second voltage level when the first output terminal is at the first voltage level, and set the second output terminal to be at the first voltage level when the first node is at the first voltage level.