GOA Circuit Pull-Down Speed via Expanded Discharge Path
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Solution Overview
Problem
Conventional Gate Driver on Array (GOA) circuits for LCDs have slow pull-down speeds, which hinder the performance of liquid crystal display panels due to limited discharge paths in the pull-down maintaining module.
Innovation Solution
The GOA circuit incorporates cascaded GOA units with enhanced pull-down maintaining modules, featuring additional transistors and a controlling module that increases the discharge path by connecting with adjacent GOA units, thereby accelerating the pull-down speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the conventional GOA technique uses a reverse device for the pull-down process in the pull-down maintaining module, then the circuit structure is simple, but the pull-down speed is slow which reduces LCD performance
Solution Approach 1:
The pull-down maintaining module is segmented into multiple transistor components (sixth, seventh, eighth, ninth, tenth, and eleventh transistors) that work together to create enhanced discharge paths. This segmentation allows the pull-down function to be distributed across multiple elements, improving speed while maintaining manageable complexity through modular design
Solution Approach 2:
The patent introduces a new dimension to the discharge path by connecting the controlling module with adjacent GOA units. This creates additional discharge pathways that extend beyond the traditional single-unit approach, significantly accelerating the pull-down speed through multi-dimensional current flow paths
2Reliability
If the pull-down maintaining module uses a limited discharge path, then the device complexity is low, but the response speed is slow which hinders LCD performance
Solution Approach 1:
The controlling module merges the discharge paths of multiple transistors (sixth, seventh, eighth, ninth, tenth, and eleventh transistors) into a unified enhanced discharge pathway. This merging consolidates the pull-down function across multiple components, improving reliability and response speed while presenting a coherent structural solution
Solution Approach 2:
By connecting with adjacent GOA units, the patent adds another dimension to the discharge path architecture. This creates redundant and parallel discharge pathways that improve reliability through multiple routes, while the systematic integration maintains acceptable device complexity
Data Source
AI summary
The present disclosure relates to a gate driver on array (GOA) circuit and a liquid crystal display (LCD). The GOA circuit includes a plurality of cascaded-connected GOA units connected, and the GOA unit at N-th level includes: a pull-up controlling module, a pull-up module, a down-transfer module, a bootstrap capacitor module, a pull-down maintaining module, a pull-down module and a controlling module. The controlling module respectively connects with the pull-down maintaining module and the adjacent GOA unit, and the controlling module is configured to accelerate a pull-down speed of the pull-down maintaining module by increasing a discharge path of the pull-down maintaining module on the GOA unit at the next level. As such, the response speed of the pull-down maintaining module may be improved, so as to improve the performance of the pull-down maintaining module.