Bidirectional Scanning Unit for Gate Driving Circuit Versatility
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Solution Overview
Problem
Existing gate driving circuits face challenges in designing diverse scanning capabilities, particularly in efficiently scanning multi-stage gate lines to meet the demands of modern display technologies.
Innovation Solution
A bidirectional scanning unit comprising a first-stage and second-stage sub-unit, which can output scanning signals in both directions, simplifying the circuit structure and enabling stage-by-stage scanning, thereby meeting the diversity demands of gate driving circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional gate driving circuit is used to scan multi-stage gate lines, then the scanning function is achieved, but the circuit structure becomes complex and lacks diversity
Solution Approach 1:
The gate driving circuit is divided into multiple independent scanning units, each capable of scanning a specific stage. Each scanning unit includes separate pull-up and pull-down control modules that can operate independently. This segmentation allows the circuit to maintain simplicity at the unit level while achieving complex multi-stage scanning functionality through coordination of multiple units.
Solution Approach 2:
Each scanning unit is designed with universal functionality to handle both pull-up and pull-down operations through shared control structures. The first and second control terminals can selectively control different voltage terminals (first, second, or third voltage terminals) to achieve multiple scanning modes (forward, backward, bidirectional) using the same basic circuit architecture, thereby reducing overall circuit complexity while enhancing versatility.
2Adaptability or versatility
If the gate driving circuit is designed to meet diverse scanning demands, then the adaptability is improved, but the circuit structure becomes more complex
Solution Approach 1:
The circuit employs dynamic control through the first and second control terminals that can selectively activate different voltage terminals based on scanning requirements. The control terminals dynamically switch between controlling the first voltage terminal for pull-up operations and the second voltage terminal for pull-down operations, or use the third voltage terminal for bidirectional control. This dynamic switching capability allows a single circuit structure to adapt to multiple scanning modes without requiring separate dedicated circuits for each mode.
Data Source
AI summary
A bidirectional scanning unit, a driving method and a gate driving circuit are provided. The bidirectional scanning unit includes a first-stage sub unit and a second-stage sub unit, the bidirectional scanning unit can output a scanning signal stage by stage in a direction from the first-stage sub unit to the second-stage sub unit, and can also output a scanning signal stage by stage in a direction from the second-stage sub unit to the first-stage sub unit. The first-stage sub unit coordinates with the second-stage sub unit in a scanning process, when one of the first-stage sub unit and the second-stage sub unit outputs the scanning signal, the other of the first-stage sub unit and the second-stage sub unit does not output the scanning signal.