Modular LED Lighting Emergency Circuit Design
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Solution Overview
Problem
LED lighting systems are rendered inoperable and uncontrolled during power supply failures, preventing both lighting and communication functionality.
Innovation Solution
A modular LED lighting system with an emergency light operating circuit that includes a rechargeable energy store and a control unit, allowing the system to maintain operation and communication even during AC supply voltage failures, using a charging circuit and discharge circuit to provide power and adjust LED brightness or color as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LED lighting system is connected to external power supply system, then lighting device can be used without limitation in the area where power supply system is available, but the fundamental functionality of the LED lighting device becomes dependent on the power supply system and lighting is impossible in the event of a failure
Solution Approach 1:
A rechargeable energy store (battery) is integrated into the LED lighting system and continuously charged from the external power supply when available. This preliminary charging action ensures that sufficient energy is stored beforehand to maintain lighting functionality during power supply failures, eliminating the system's dependency on continuous external power availability.
Solution Approach 2:
The LED lighting system is designed with dual functionality: it can operate in normal mode when external power is available and in emergency mode when external power fails. The integrated energy store and control unit enable the system to automatically switch between these modes, making the lighting device universally functional regardless of external power supply status.
2Reliability
If LED lighting system is connected to external power supply system, then lighting can be provided continuously, but communication between individual lamps and central control unit is precluded in the event of a power failure
Solution Approach 1:
The rechargeable energy store is continuously charged from the external power supply during normal operation. This preliminary energy accumulation ensures that sufficient power is available to maintain communication functionality between individual lamps and the central control unit even when the external power supply fails, preventing communication blackout during emergencies.
Solution Approach 2:
The system uses its own integrated energy store to maintain communication functionality during power failures, rather than relying on external power. The control unit and communication bus are powered by the stored energy, enabling the system to self-maintain communication capabilities without external power assistance.
3Reliability
If several circuit blocks are functionally present for operating LED path properly, then LED path can be operated advantageously, but relatively complex circuits result
Solution Approach 1:
The patent integrates multiple previously separate circuit blocks into a unified system architecture. The energy store, charging circuit, constant-current source, and control unit are combined into a single integrated system where components share common elements (such as the control unit managing both charging and LED driving functions). This merging reduces overall system complexity while maintaining reliable LED operation.
Solution Approach 2:
The control unit is designed with multi-functionality, serving both as the controller for LED operation and as the manager for the charging/discharging cycles of the energy store. The constant-current source also serves dual purposes during normal operation and emergency mode. This universal design reduces the number of separate circuit blocks needed while ensuring reliable LED operation across different operating conditions.
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 and communication of LED lighting systems during power outages, allowing for dimming or color changes, and maintains functionality with reduced energy consumption.
Implementation Method 1
an emergency light operating circuit which is connected to a rechargeable energy store and takes over the feeding of the modular LED lighting in the event of failure of the AC supply voltage
Implementation Method 2
an LED module which has at least one LED path and which is supplied by the further submodule
Data Source
AI summary
The invention relates to a modular LED lighting unit, comprising a first module (1) to which an AC supply voltage (9) can be supplied and which comprises: a second sub-module (B), at the output of which a DC supply voltage (5) is provided which is galvanically isolated from the AC supply voltage (9), and a control unit (G), further comprising a second module (2) which comprises a further sub-module (C) supplied with the DC supply voltage (5) of the first module (1), in particular a pulsed constant current source, which is controlled by a control unit (E) of the second module (2), an LED module (F) which has at least one LED range (8) and is supplied by the further sub-module (C), inn particular a constant current source, and an emergency light operating circuit which is connected to a rechargeable energy store (ES); and takes over powering the modular LED lighting unit in the event of failure of the AC supply voltage (9).