GOA Drive System with Automatic Detection Interrupting Function
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Solution Overview
Problem
The existing liquid crystal display panels face yield reduction due to the lack of redundancy in gate driver circuits, where a malfunctioning GOA module on one side can affect the entire panel, leading to display interference and reduced production efficiency.
Innovation Solution
A GOA drive system with two independent GOA modules, each cascade-connected and coupled with an automatic detection interrupting function module, utilizing a drive IC to detect feedback signals and control the scan start signal, ensuring normal operation by terminating the abnormal module and maintaining display integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single GOA module is used for driving the liquid crystal panel, then the device complexity is reduced, but the reliability deteriorates because a malfunctioning GOA module causes the entire panel to fail
Solution Approach 1:
The gate driver is divided into two independent GOA modules positioned at opposite sides of the display area. Each module can operate independently to drive the panel, allowing one module to compensate for failures in the other, thereby improving reliability without requiring a complete system redesign
Solution Approach 2:
The invention changes the operational parameter from single-module driving to dual-module driving with automatic detection and interrupting functions. The detection module monitors the feedback signals and dynamically adjusts which GOA module is active, transforming a static single-point-of-failure system into a dynamic redundant system
2Reliability
If automatic detection interrupting function modules are added to each GOA module, then the reliability is improved by detecting and isolating failures, but the device complexity increases
Solution Approach 1:
The automatic detection interrupting function module receives feedback signals from the GOA unit circuits and automatically determines whether to continue or terminate driving based on the normality of these signals. This closed-loop feedback mechanism enables automatic failure detection and isolation without requiring complex external monitoring systems
Solution Approach 2:
The GOA drive system performs self-diagnosis and self-protection through the automatic detection interrupting function modules. When a malfunction is detected, the system automatically terminates the abnormal GOA module and switches to the other module, enabling the system to service itself without external intervention and maintain continuous operation
Data Source
AI summary
The present invention provides a GOA drive system and a liquid crystal panel. Two GOA modules (2) are respectively provided at two sides of the liquid crystal display area (1), and each GOA module (2) is electrically coupled to one automatic detection interrupting function module (3) correspondingly, and each automatic detection interrupting function module (3) receives a feedback signal (FB) transmitted from the GOA unit circuit of the last stage of the GOA module (2), and by detecting whether the feedback signal (FB) is normal or abnormal, the scan start signal (STV) is transmitted or not transmitted to the corresponding GOA module (2) to normally drive the corresponding GOA module (2) or terminate driving so that as the GOA module (2) at one side of the liquid crystal panel display area (1) appears to be abnormal, the corresponding automatic detection interrupting function module (3) terminates driving the abnormal GOA module (2), and the GOA module (2) at the other side of the liquid crystal panel display area (1) continues normal driving, which contributes to raise the yield of the liquid crystal panel.