LED Lighting System Presence Detection Control Circuit
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Solution Overview
Problem
Existing lighting systems face challenges in efficiently managing power consumption and control for a large number of light sources, particularly in installations where increasing the number of light sources or replacing control devices is costly and requires significant rewiring, and manual switches can lead to bacterial contamination and safety hazards.
Innovation Solution
A LED lighting system utilizing a presence detector to control multiple luminaires, where at least one luminaire is remote and powered by two power supply wires and a control wire, featuring a control circuit with a power switch and power supply circuit that reduces energy consumption and allows for low-cost installation by using existing wiring, with optional features like progressive extinguishing and silent operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a large number of light sources are connected to common electrical wires for simultaneous control, then switching control is achieved, but the electrical intensity through the wires increases requiring higher power switches and more complex wiring
Solution Approach 1:
The system segments the control function by introducing individual control circuits at each luminaire that can independently switch power to LED strings. Each control circuit receives a common control signal but independently manages its local power distribution, dividing the cumulative power load from central wires into distributed local loads.
Solution Approach 2:
Control circuits act as intermediary devices between the common control wire and the power supply wires. These intermediaries receive low-power control signals and translate them into local power switching actions, eliminating the need for high-power switching through the common control infrastructure.
2Ease of operation
If manual switches are used for controlling light sources, then switching control is achieved, but bacterial contamination and safety hazards increase
Solution Approach 1:
The system enables self-service control through presence detectors that automatically detect occupancy and trigger lighting without manual intervention. The control circuits respond autonomously to control signals, eliminating the need for physical contact with manual switches while maintaining convenient on-demand lighting control.
Solution Approach 2:
The patent replaces mechanical manual switches with electronic control circuits and presence detectors. The mechanical contact-based switching is substituted with electronic signal processing and automated detection systems, eliminating bacterial contamination risks while providing equivalent or superior control functionality.
3Ease of manufacture
If existing wiring is used for installation, then installation cost is reduced, but the system must work with limited wire capacity and configuration options
Solution Approach 1:
The control circuits are designed to universally accept standard wiring configurations and adapt their operation accordingly. The system can function with existing two-wire or three-wire infrastructures, and the control circuits can be configured for different luminaire types and control scenarios, providing multi-functional compatibility across diverse installation environments.
Solution Approach 2:
The system accommodates different wiring scenarios by changing operational parameters within the control circuits. The circuits can adjust their behavior based on the detected wire configuration, power availability, and control signal characteristics, enabling the same hardware to adapt to various existing infrastructure conditions without requiring redesign.
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 achieves energy efficiency, reduced installation costs, and improved reliability by using existing wiring, minimizing power consumption, and providing safe and hygienic lighting solutions with reduced risk of accidents and bacterial contamination.
Implementation Method 1
a light emitting diode light source
Data Source
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AI summary
The invention relates to a light-emitting diode (LED) lighting system (1000) comprising a presence detector (113) controlling at least two luminaires (100, 200), at least one of which is located at a distance from the presence detector (113). The luminaire (200) is powered by two power supply wires (I, II) and controlled by a control wire (III) connected to the presence detector (113). The luminaire (200) includes a control circuit connected to the three wires (I, II, III) and capable of controlling a power switch in response to the detection of a predefined voltage between one of the two power supply wires (II) and the control wire (III). A power supply circuit is disposed between the power switch and the light source (115). The light source (115) is powered by the power supply circuit such that opening the power switch interrupts the power supply to the light source (115).