Portable Lighting Device Power Recognition Circuit
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Solution Overview
Problem
Lighting devices used in workplaces often face interruptions due to power failures from external power supplies or battery depletion, leading to unavailability during emergencies and disruptions in work.
Innovation Solution
A portable lighting device with a power recognition circuit that selectively outputs power from either a battery pack or an external power supply to a power conversion circuit, allowing seamless switching between power sources, including a capacitor for charging and switching components to manage the transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the lighting device is powered by an external power supply, then the lighting device can operate continuously without battery replacement, but the lighting device becomes unavailable during power failures
Solution Approach 1:
The patent combines two power supply systems (external power supply and battery pack) into a unified lighting device. The power recognition circuit intelligently selects and switches between the two power sources, allowing the device to operate continuously from external power when available and automatically transition to battery power during external power failures, thus resolving the contradiction between continuous operation and reliability during power failures.
Solution Approach 2:
The lighting device is designed with multi-functionality to accept both external power supply and battery pack as power sources. The power recognition circuit provides universal power interface that can recognize and adapt to different power sources, enabling the device to function reliably regardless of whether external power is available or not, thereby improving both operation duration and reliability.
2Reliability
If the lighting device is powered by a battery pack, then the lighting device can operate independently without external power, but the lighting device becomes unavailable when battery electric quantity is exhausted
Solution Approach 1:
The patent merges the battery pack power system with external power supply capability. The power recognition circuit monitors battery electric quantity and automatically switches to external power supply when the battery is exhausted or low on power. This combination allows the device to maintain independent operation capability while extending the overall operation duration beyond what a single battery pack could provide.
Solution Approach 2:
The power recognition circuit acts as an intermediary that manages the transition between battery pack and external power supply. It monitors the battery's electric quantity and intelligently switches power sources, ensuring continuous operation. This mediator component resolves the contradiction by seamlessly coordinating between the two power sources to extend operation duration while maintaining independent operation capability.
3Device complexity
If the lighting device uses a single power source, then the device structure is simple, but the device cannot adapt to different power supply conditions
Solution Approach 1:
The lighting device incorporates a universal power interface that can accept both external power supply and battery pack. The power recognition circuit provides intelligent adaptation to different power sources without requiring complex manual configuration. This multi-functional design enables the device to adapt to various power supply conditions while maintaining relatively simple structure through integrated power management.
Solution Approach 2:
The power recognition circuit provides self-service by automatically recognizing the available power source and switching between external power supply and battery pack without user intervention. This intelligent self-management capability allows the device to adapt to different power supply conditions while keeping the control system simple, resolving the contradiction between device complexity and adaptability.
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
Ensures continuous operation by automatically switching to an external power supply during failures, conserving battery power and expanding usage scenarios, thus preventing interruptions during emergencies.
Implementation Method 1
The power recognition circuit includes a capacitor connected to the first power interface, and the capacitor is configured to start being charged after the battery pack is connected to the first power interface
Data Source
AI summary
A portable lighting device includes a lighting assembly, a switch assembly, a control module, a power supply, a power recognition circuit, and a power conversion circuit. The control module is configured to control the lighting assembly to light up according to an indication of the switch assembly. The power supply is used for supplying power to the lighting assembly and includes a battery pack and an external power supply. The power conversion circuit is used for converting a power of the power supply into a power output adapted to the lighting assembly and the control module. The power recognition circuit is configured to selectively output the power of the battery pack or the power of the external power supply to the power conversion circuit.