Dual Gate Driver Protection Circuits for Display Continuity
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Solution Overview
Problem
In double-side gate-drive GOA panels, overcurrent flowing through a defective gate driver circuit causes the entire display to shut down, making it difficult to identify the defect and maintain display functionality.
Innovation Solution
A display device with separate protection circuits for each gate driver circuit, allowing one to continue operating while the other is protected from overcurrent, and adjusting detection thresholds based on notification signals to accommodate changes in current load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single protection circuit is used to protect both gate driver circuits from overcurrent, then the gate driver circuits are protected from damage, but the entire display shuts down when overcurrent occurs, making it difficult to identify defects
Solution Approach 1:
The protection circuit is divided into two independent circuits: a first protection circuit for the first gate driver circuit and a second protection circuit for the second gate driver circuit. Each protection circuit independently monitors and protects its corresponding gate driver circuit, preventing overcurrent damage while allowing the other side to continue operating and displaying information.
2Loss of information
If separate protection circuits are used for each gate driver circuit, then display can be maintained after overcurrent on one side, but the device complexity increases
Solution Approach 1:
The protection system is segmented into two independent circuits, each handling one gate driver circuit. This segmentation allows the system to maintain display functionality on the healthy side while protecting against overcurrent on the defective side, achieving display continuity without requiring a completely redundant complex system.
Solution Approach 2:
Each protection circuit is designed with local quality to detect and respond to overcurrent conditions specific to its associated gate driver circuit. The first protection circuit monitors the first gate driver circuit while the second protection circuit monitors the second gate driver circuit, allowing localized protection responses that maintain overall system functionality.
Data Source
AI summary
A display device includes: a display panel including a pixel array including a plurality of pixels, a plurality of gate bus lines connected to the pixel array, a first gate driver circuit disposed on one side of the pixel array, and configured to supply a scan signal to the plurality of gate bus lines, and a second gate driver circuit disposed opposite the first gate driver circuit with respect to the pixel array, and configured to supply a scan signal to the plurality of gate bus lines; a first protection circuit configured to detect a first overcurrent supplied to the first gate driver circuit to protect the first gate driver circuit from the first overcurrent; and a second protection circuit different from the first protection circuit, and configured to detect a second overcurrent supplied to the second gate driver circuit to protect the second gate driver circuit from the second overcurrent.