GOA Circuit Pull-Down Holding Sharing for Narrow Frame LCD
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Solution Overview
Problem
Conventional gate driver on array (GOA) circuits require multiple pull-down maintaining circuits, leading to increased layout width and difficulty in designing narrow-frame liquid crystal displays due to the complexity and space occupation of these circuits.
Innovation Solution
The GOA circuit is configured such that each pull-down maintaining circuit corresponds to multiple GOA units, outputting second-level signals during a non-operation period, reducing the number of pull-down circuits and minimizing the layout width by sharing transistors across units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pull-down maintaining circuits are used in the GOA circuit, then the reliability of signal maintenance is improved, but the layout width increases and device complexity increases
Solution Approach 1:
The patent merges multiple pull-down maintaining circuits into a single shared circuit that serves multiple GOA units. Instead of having separate pull-down circuits for each GOA unit, one pull-down maintaining circuit is designed to maintain signals across multiple units simultaneously, reducing the overall layout width while maintaining signal reliability.
Solution Approach 2:
The pull-down maintaining circuit is designed with multi-functionality to serve multiple GOA units. The circuit can maintain pull-down signals for different GOA units during non-operation periods, making a single circuit perform the function of multiple separate circuits, thereby reducing layout width and device complexity.
2Reliability
If multiple pull-down maintaining circuits are used in the GOA circuit, then the signal maintenance capability is improved, but the device complexity increases
Solution Approach 1:
Multiple pull-down maintaining circuits are merged into a single shared circuit structure. This consolidation reduces the total number of circuits and transistors needed, simplifying the overall device complexity while maintaining the capability to service multiple GOA units during non-operation periods.
Solution Approach 2:
The pull-down maintaining circuit is designed as a universal circuit that can maintain signals for multiple GOA units. This multi-functional design eliminates the need for separate dedicated circuits for each unit, reducing device complexity while preserving signal maintenance capability across all units.
3Manufacturing precision
If each GOA unit has dedicated pull-down maintaining circuits, then the signal maintenance precision is improved, but the layout width increases
Solution Approach 1:
The patent combines dedicated pull-down maintaining functions into a shared circuit architecture. Instead of having separate circuits for each GOA unit, the merged circuit maintains signals for multiple units, achieving the necessary signal maintenance precision while significantly reducing the layout width occupied by these circuits.
Data Source
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AI summary
A GOA circuit and a liquid crystal display. The GOA circuit comprises multiple cascaded GOA units (11) and multiple pull-down holding circuits (12), where the multiple cascaded GOA units (11) are used, under the control of multiple clock signals, for respectively outputting gate driving signals of a first level signal so as to charge corresponding horizontal scan lines in a display area; each pull-down holding circuit (12) corresponds to at least two GOA units (11), each pull-down holding circuit (12) is used for holding at a second level signal the gate driving signals outputted by the corresponding at least two GOA units (11) during an inactive period. By such means, the number of pull-down holding circuits can be reduced, thus reducing the width of a wiring area of the GOA circuit so as to satisfy the demand for liquid crystal display narrow edge frame designs.