Emergency LED Lighting System with Integrated Battery and Relay Switching
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Solution Overview
Problem
Existing LED lighting systems face challenges in providing cost-effective and efficient emergency lighting solutions that are compatible with AC mains and do not require ballasts, while meeting regulatory requirements for reliability and energy efficiency, especially in retrofit applications where ballast-compatible LED lamps incur high maintenance and energy costs.
Innovation Solution
An LED lighting system with a luminaire and emergency lighting and power system that includes a rechargeable battery, charging and discharging control circuit, and LED driving circuit, capable of operating with either AC mains or battery power, featuring a power supply unit with a full-wave rectifier, transformer, and power switching converter to stabilize voltage and current, and a relay switch configuration for reliable operation during power failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ballast-compatible LED lamps are used to replace fluorescent lamps, then installation is straightforward without rewiring, but total cost of ownership increases due to ballast maintenance and replacement costs
Solution Approach 1:
The patent removes the ballast component from the lighting system entirely, replacing it with an LED lamp that integrates its own driving circuitry and emergency power system. This extraction eliminates the need for ballast maintenance and replacement, resolving the cost of ownership issue while maintaining installation simplicity through direct replacement of the fluorescent lamp.
Solution Approach 2:
The LED lamp is designed to perform multiple functions: normal lighting operation from AC mains and emergency lighting operation from an integrated rechargeable battery. This multi-functionality eliminates the need for separate ballast and emergency lighting systems, reducing overall system complexity and maintenance requirements.
2Quantity of substance
If ballast-compatible LED lamps are used, then initial cost is low, but long-term maintenance costs preponderate over initial savings
Solution Approach 1:
By extracting and removing the ballast from the system, the patent eliminates the component that requires maintenance and replacement. The LED lamp with integrated driving circuitry and emergency power system has no separate ballast to fail, thereby eliminating long-term maintenance costs while keeping initial costs competitive.
Solution Approach 2:
The LED lamp includes an integrated rechargeable battery and charging circuit that automatically charges during normal operation and provides emergency lighting when needed. This self-service capability eliminates the need for external ballasts and emergency lighting systems, reducing maintenance requirements over time.
3Use of energy by moving object
If AC mains-operable LED lamps are used without ballasts, then energy efficiency improves, but compatibility with existing fixtures requires removing or bypassing ballasts
Solution Approach 1:
The patent removes the ballast from the system and integrates all necessary driving and power management functions directly into the LED lamp. This extraction enables AC mains operation without ballasts, improving energy efficiency while maintaining retrofit compatibility through straightforward lamp replacement.
Solution Approach 2:
The LED lamp is designed as a universal replacement that can be installed in existing fixtures without modifying the fixture itself. The lamp integrates AC mains operation, battery emergency power, and all driving functions in one unit, enabling easy retrofit while achieving superior energy efficiency.
4Device complexity
If LED lighting system operates without emergency power capability, then system complexity is reduced, but compliance with regulatory requirements for emergency lighting is not met
Solution Approach 1:
The patent merges the emergency power system, including rechargeable battery and charging circuit, directly into the LED lamp. This integration provides emergency lighting compliance while maintaining a simple single-lamp replacement installation process, avoiding the need for separate emergency lighting systems.
Solution Approach 2:
The LED lamp is designed as a multi-functional device that provides both normal lighting from AC mains and emergency lighting from an integrated battery. This universal design meets regulatory requirements for emergency lighting while maintaining simple installation and operation, avoiding the complexity of separate emergency lighting 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 system provides stable and efficient operation of LED arrays during low power conditions, ensuring compliance with regulatory requirements for emergency lighting without the need for additional ballasts, reducing maintenance and energy costs, and extending the lifespan of LED lamps.
Implementation Method 1
a rechargeable battery with a terminal voltage
Implementation Method 2
a power supply unit with a full-wave rectifier
Implementation Method 3
transformer, and power switching converter to stabilize voltage and current
Implementation Method 4
one or more LED arrays with a forward voltage across thereon
Data Source
AI summary
An emergency lighting and power system comprises a rechargeable battery, an LED driving circuit, and a charging and discharging control circuit. The emergency lighting and power system is intended to automatically supply illumination or power or both in an event of failure of normal power supply. The LED driving circuit is configured to convert a terminal voltage from the rechargeable battery into an AC voltage to operate a luminaire when a line voltage from AC mains is unavailable. The charging and discharging control circuit comprises at least two relay switches configured to sense a loss of normal power supply, to switch between normal power and an emergency power to operate the luminaire in proper situations, and to meet regulatory requirements without operational ambiguity and safety issues.