Dual-State GOA Circuit Defect Compensation
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Solution Overview
Problem
The yield rate of Gate Driver on Array (GOA) circuits in liquid crystal display devices is low due to defects, which affects the production efficiency and quality of high-resolution displays with narrow bezels.
Innovation Solution
A dual-state GOA circuit design comprising a first gate driver sub-circuit for normal operation and a second sub-circuit for operation when defects occur in the first, with a detection circuit and switching mechanism to seamlessly transition between states, ensuring continuous driving and improving yield rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single GOA circuit is used to drive gate lines, then the device complexity is reduced, but the reliability deteriorates due to low yield rate from defects
Solution Approach 1:
The GOA circuit is divided into multiple independent sub-circuits (first GOA sub-circuit and second GOA sub-circuit), each capable of independently driving gate lines. This segmentation allows the system to isolate defects to specific sub-circuits while maintaining overall system reliability through redundant functional units.
Solution Approach 2:
The patent introduces a switching mechanism that changes the operational state parameters of the GOA sub-circuits between normal operation mode and defect compensation mode. By dynamically adjusting which sub-circuit operates based on defect detection, the system maintains high reliability without permanently increasing complexity.
2Reliability
If defect detection and switching between sub-circuits is implemented, then the reliability improves, but the device complexity increases
Solution Approach 1:
The patent implements preliminary defect detection during the manufacturing process, allowing defective sub-circuits to be identified and isolated before final assembly. This preliminary action enables the switching mechanism to be pre-configured, reducing the complexity of real-time control while ensuring high reliability through advance preparation.
Solution Approach 2:
A switching mechanism acts as an intermediary component that manages the transition between different GOA sub-circuits based on defect status. This intermediary simplifies the control logic by providing a dedicated component that handles the complexity of selecting which sub-circuit to activate, thereby improving reliability without proportionally increasing overall system complexity.
Data Source
AI summary
The present invention discloses a gate driver on array circuit and a driving method thereof, and a display device. The gate driver on array circuit comprises a first gate driver on array sub-circuit and a second gate driver on array sub-circuit; the first gate driver on array sub-circuit is configured to drive in a first working state which is a state in which no defect occurs in the first gate driver on array sub-circuit; the second gate driver on array sub-circuit is configured to drive in a second working state which is a state in which a defect occurs in the first gate driver on array sub-circuit. The present invention improves the yield rate of the gate driver on array circuit.