Power Voltage Generator Open Circuit Detection
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Solution Overview
Problem
Display apparatuses face safety and reliability issues due to the inability of existing power voltage generators to detect open circuit conditions, leading to potential overcurrent, overheating, and fire risks.
Innovation Solution
A power voltage generator equipped with sensors, a comparator, and a shutdown controller that senses voltage differences between output nodes and shuts down the system when an open circuit is detected, preventing damage and ensuring safety and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection circuit is added to detect open circuit conditions, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The protection circuit is divided into separate functional modules: a first protection circuit connected to the first power voltage output node and a second protection circuit connected to the second power voltage output node. Each module independently monitors its respective output node, allowing the system to detect open circuit conditions without requiring a single complex monitoring system.
Solution Approach 2:
Sensing resistors are introduced as intermediary components between the power voltage output nodes and the protection circuits. These resistors convert voltage signals into current signals that can be monitored by the protection circuits, enabling indirect detection of open circuit conditions without directly interfering with the main power output.
2Measurement precision
If dual sensors and comparator are implemented, then open circuit detection accuracy is improved, but device complexity increases
Solution Approach 1:
The system continuously monitors the voltage levels at both power voltage output nodes and compares them against reference values through the protection circuits. When an open circuit condition is detected, the feedback mechanism triggers a shutdown signal to stop the power voltage generator, creating a closed-loop control system that maintains detection accuracy.
Solution Approach 2:
The patent replaces complex mechanical or analog comparison mechanisms with electronic voltage comparison using the protection circuits and sensing resistors. The electronic comparison of voltage levels provides precise detection of open circuit conditions without requiring complex mechanical sensing or manual inspection systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents damage and ensures safety and reliability by accurately detecting open circuits and shutting down the power voltage generator, thereby preventing overcurrent and overheating issues.
Implementation Method 1
A current flowing through the first power voltage output node may be converted into a first sensing voltage by the first sensing resistor
Implementation Method 2
A current flowing through the second power voltage output node may be converted into a second sensing voltage by the second sensing resistor
Data Source
AI summary
A power voltage generator includes a first sensor, a second sensor, a comparator and a shutdown controller. The first sensor is configured to sense a first power voltage output node that outputs a first power voltage. The second sensor is configured to sense a second power voltage output node that outputs a second power voltage. The comparator is configured to compare a first sensing signal of the first sensor with a second sensing signal of the second sensor. The shutdown controller is configured to shut down the power voltage generator based on a comparison signal from the comparator.