Display Protection Circuit for GOA Short-Circuit Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with Gate Driver on Array (GOA) architecture are prone to short-circuiting due to manufacturing fluctuations and extreme environmental conditions, leading to increased current and temperature at short-circuit locations, potentially causing irreversible damage without adequate protection mechanisms.
Innovation Solution
A protection circuit is integrated into the display device, comprising a control circuit, current detection circuit, and comparison circuit, which generates a power control signal to stop power supply to the gate driving circuit when excessive current is detected, thereby preventing damage from short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If Gate Driver on Array (GOA) architecture is adopted to integrate row scan driving circuit inside display panel, then manufacturing cost is reduced and integration is improved, but the circuit becomes more susceptible to short-circuiting due to manufacturing fluctuations and environmental conditions
Solution Approach 1:
The protection circuit performs preliminary detection of current at the signal input terminal before short-circuit damage can occur. When abnormal current exceeding the threshold is detected, the protection circuit preemptively stops power supply to the gate driving circuit, preventing irreversible damage. This advance protective action resolves the contradiction by maintaining reliability without sacrificing the manufacturing simplicity of GOA architecture.
2Reliability
If protection circuit is added to detect and stop power supply upon short-circuit, then reliability is improved and damage is prevented, but device complexity increases
Solution Approach 1:
The protection circuit implements a feedback mechanism by continuously monitoring the current at the signal input terminal and automatically adjusting power supply based on detected conditions. When abnormal current is detected, the feedback loop triggers power supply interruption; when normal operation resumes, power supply is restored. This automated feedback control provides reliable short-circuit protection while maintaining relatively simple circuit structure compared to manual protection schemes.
Data Source
AI summary
The present disclosure relates to a protection circuit for a display device, a display device thereof, and a method for protecting a display device using a protection circuit. The display device includes a gate driving circuit, a level shift circuit, and a power management circuit. The level shift circuit is configured to provide an input signal to a signal input terminal of the gate driving circuit. The power management circuit is configured to provide power to the gate driving circuit. The protection circuit is configured to provide a power control signal to the power management circuit based on a current at the signal input terminal of the gate driving circuit, so that the power management circuit stops providing the power to the gate driving circuit.