PoE Lighting Multiplexing for Independent Fixture Control
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Solution Overview
Problem
Conventional PoE systems face issues such as overdriving and damage to fixtures when one or more are removed, require a CPU and two-way communication in each fixture for control, and lack efficient color/temperature control without a CPU, and are limited by fixed power distribution.
Innovation Solution
A PoE multiplexing architecture with a single CPU/Driver that decouples power and control data, allowing multiple light fixtures to be controlled and powered independently, enabling color tuning and power management through a network interface and splitter configurations for various lighting architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional PoE systems use fixed power distribution over a single cable, then power can be delivered to multiple fixtures, but the fixtures cannot be independently controlled and may be overdriven when others are removed
Solution Approach 1:
The patent segments the control function from the lighting fixtures by introducing a centralized controller that communicates with simple LED drivers in each fixture. The controller divides the fixed power into controllable channels, allowing independent control of each fixture without requiring complex hardware in the fixtures themselves. Each fixture receives control signals through the same PoE cable but can be independently adjusted.
Solution Approach 2:
The patent introduces an intermediary controller device that sits between the PoE power source and the lighting fixtures. This intermediary receives power and control data over the PoE cable, processes the control information, and distributes appropriate power levels to each fixture. This mediator enables independent control while keeping fixture hardware simple.
2Adaptability or versatility
If each lighting fixture includes a CPU and two-way communication capability for control, then color and temperature can be controlled, but the device complexity and cost increase
Solution Approach 1:
The patent extracts the CPU and two-way communication capabilities from individual lighting fixtures and consolidates them into a single external controller. The fixtures themselves contain only simple LED drivers that respond to control signals from the external controller. This extraction maintains full color and temperature control versatility while dramatically reducing the complexity and cost of each individual fixture.
Solution Approach 2:
The external controller serves multiple functions: it manages power distribution, controls color temperature, communicates with all fixtures, and handles system configuration. By making the controller universal and multi-functional, the patent eliminates the need for each fixture to have its own CPU and communication hardware, achieving versatility without per-fixture complexity.
3Productivity
If PoE cable carries both data and power, then a single cable provides both connections, but the power distribution is fixed and cannot be dynamically adjusted per fixture
Solution Approach 1:
The patent introduces dynamic power adjustment by placing a controllable power distribution system between the fixed PoE power source and the variable lighting loads. The controller can dynamically adjust the power delivered to each fixture based on operational requirements, fixture type, and environmental conditions, transforming the static PoE power delivery into a dynamic, adaptable system while maintaining single-cable efficiency.
Data Source
AI summary
A control system for controlling multiple individually addressable devices, such as lighting devices, each having a logical address based on a network addressing scheme, each lighting device being connected to a computer network through a cable that transmits electric power for powering one or more lighting elements of the lighting device. A driver multiplexes power and control to a group of lighting devices to achieve increased data and power management.