LED Lamp Backup Lighting Using AC Wiring Activation
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Solution Overview
Problem
Conventional LED lighting systems require numerous additional components and complex circuitry to provide backup lighting during power failures, making them inefficient and costly.
Innovation Solution
A lighting device with a secondary LED lamp assembly and a secondary power source, connected through a switch to the AC mains supply, which allows for seamless transition from primary to secondary power source during outages, using a charging circuit and distinct color temperatures to indicate power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional secondary lighting systems are used for backup lighting during power failures, then lighting is provided during outages, but the system requires separate fixtures with separate power supplies and independent control circuitry, resulting in increased device complexity and cost
Solution Approach 1:
The patent combines the secondary backup lighting system with the primary LED lighting fixture, integrating both functions into a single device. The secondary LED lamp assembly and power source are incorporated within the same fixture housing, eliminating the need for separate emergency lighting fixtures and reducing overall system complexity while maintaining backup lighting reliability
Solution Approach 2:
The lighting fixture is designed to perform multiple functions: it operates as a primary LED lighting system during normal power conditions and automatically switches to a secondary backup lighting system during power failures. The single fixture serves both as normal lighting and emergency lighting, eliminating the need for separate dedicated emergency lighting fixtures
2Extent of automation
If impedance sensing circuitry and control circuitry are added to provide backup lighting, then power failure detection and automatic switching is enabled, but the number of additional components and circuitry increases, resulting in increased device complexity
Solution Approach 1:
The power supply utilizes its existing output to automatically control the switch that connects or disconnects the secondary LED lamp assembly and power source based on AC mains power availability. The system self-regulates without requiring separate impedance sensing or control circuitry, as the power supply's existing control capability is repurposed to manage the backup lighting activation and deactivation
3Reliability
If a secondary lighting system with separate fixtures and power supplies is implemented, then backup lighting is provided, but the cost of additional components and installation increases
Solution Approach 1:
The patent integrates the secondary backup lighting system within the primary LED lighting fixture housing, combining both lighting functions into a single manufactured unit. This integration reduces the number of separate components that need to be manufactured and installed, lowering overall system cost while maintaining reliable backup lighting functionality
Solution Approach 2:
The single lighting fixture is designed to provide both normal LED lighting and emergency backup lighting functions, eliminating the need to purchase and install separate dedicated emergency lighting fixtures. This multi-functional approach reduces material costs, installation labor, and maintenance requirements compared to separate fixture 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
Enables efficient and cost-effective backup lighting during power failures without affecting normal operation, using existing wiring infrastructure and providing visual indication of secondary power source usage.
Implementation Method 1
a secondary power source, wherein the secondary power source is connected to the secondary LED lamp assembly through a switch
Implementation Method 2
A secondary LED lamp assembly may include one or more secondary LEDs having a color temperature of approximately 5000-6500° K
Data Source
AI summary
A lighting device includes a secondary LED lamp assembly, a secondary power source, a first switch connecting the secondary LED lamp assembly and the secondary power source upon an absence of power from an AC mains supply, and a secondary power source return circuit from the secondary LED lamp assembly through a pre-existing second switch connected to the AC mains supply and used to control the lighting device. A method of operating a lighting device includes connecting a secondary LED lamp assembly and a secondary power source upon an absence of power from an AC mains supply, and providing a secondary power source return circuit from the secondary LED lamp assembly through a pre-existing second switch connected to the AC mains supply and used to control the lighting device.