Gate-on-array Circuit Repair via Stage Segmentation
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Solution Overview
Problem
Existing display devices with gate driving circuits formed directly on the substrate face challenges in repair due to their integrated nature, making it difficult to address defects effectively.
Innovation Solution
Incorporating gate-on-array circuits with repair circuits that allow for the isolation of defective stages by controlling transistor states with repair signals, enabling the display device to be repaired by disconnecting electrical connections using signals or inherent signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the gate driving circuit is formed directly on the display substrate (gate-on-array circuit), then the integration of the display device is improved, but the ease of repair deteriorates when a defect occurs
Solution Approach 1:
The gate driving circuit is divided into multiple independent stages, where each stage can be individually controlled and isolated. When a defect occurs in one stage, only that specific stage needs to be repaired or disabled, while other stages continue to function normally. This segmentation enables localized repair without affecting the entire circuit.
Solution Approach 2:
Repair circuits are pre-configured within each stage of the gate driving circuit, including repair signal input terminals and control transistors that are initially inactive. These repair mechanisms are built in advance during manufacturing, allowing quick activation and repair of defective stages without requiring external modifications or complete circuit replacement.
2Ease of repair
If repair circuits are added to each stage of the gate-on-array circuit, then the ease of repair is improved, but the device complexity increases
Solution Approach 1:
The repair circuit functionality is merged with the existing stage structure of the gate driving circuit. Each stage incorporates a repair signal input terminal and control transistors that work alongside the normal driving transistors, sharing the same physical space and functional architecture without requiring separate dedicated repair circuit modules.
Solution Approach 2:
The control transistors in each stage serve dual functions: they act as normal driving transistors during regular operation and as repair control transistors when repair signals are applied. This multi-functionality eliminates the need for separate repair-specific components, reducing overall circuit complexity while maintaining full repair capability.
Data Source
AI summary
In a display device and a repairing method therefor, the display device includes a gate line and two gate-on-array circuits arranged at two sides thereof. Each of the gate-on-array circuits includes a stage coupled to the gate line. Each the stage includes a transistor and a repair circuit. The first source/drain electrode of the transistor is coupled to the gate line, and the second source/drain electrode of the transistor is coupled to receive a clock pulse signal. The repair circuit includes a first terminal coupled to the gate electrode of the transistor, a second terminal coupled to a predetermined potential, and at least one control terminal adapted to receive at least one repair signal to pull the potential on the gate electrode of the transistor to the predetermined potential. The transistor maintains at off-state when the at least one repair signal is supplied to the repair circuit.