Remote LED Luminaire Control Using PSK Dimming Signals
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Solution Overview
Problem
Existing LED luminaire control systems face challenges with high total cost of ownership, complex maintenance, and inefficiency due to the need for ballasts in ballast-compatible LED lamps, while AC mains-operable LED lamps lack centralized control and dimming capabilities, and traditional wired systems are prone to errors and inefficiencies.
Innovation Solution
An integrated LED luminaire control system that includes a power supply package, control circuit with a relay switch, and a transceiver circuit for remote control, enabling on-off and dimming functions without rewiring, using phase-shift keying signals and pulse-width modulation to control LED arrays directly from AC mains, eliminating the need for ballasts and reducing installation costs.
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 frequent ballast replacements and constant power consumption
Solution Approach 1:
The patent extracts and eliminates the ballast component from the lighting system by using AC mains-operable LED lamps that can be directly connected to AC power without requiring a ballast. This removes the unreliable component that requires frequent replacement while maintaining ease of installation through direct AC connection.
2Quantity of substance
If ballast-compatible LED lamps are used, then initial cost is low, but long-term maintenance costs and energy consumption increase
Solution Approach 1:
The patent implements periodic action through dimming control that allows the LED luminaire to operate at reduced power levels during periods when full illumination is not required. This periodic modulation of power consumption significantly reduces overall energy usage while maintaining the same initial installation cost structure.
3Reliability
If AC mains-operable LED lamps are used, then maintenance costs and energy consumption are reduced, but centralized control and dimming capabilities are lost
Solution Approach 1:
The patent introduces an intermediary control system consisting of a control circuit board with microcontroller and communication interface that mediates between the AC power source and the LED luminaire. This intermediary enables centralized control and dimming capabilities while maintaining the simple AC mains-operable architecture that reduces maintenance and energy consumption.
4Ease of operation
If remote control capabilities are added to LED luminaires, then control flexibility improves, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical wiring-based control systems with wireless communication (RF or infrared) for remote control. This substitution provides control flexibility through wireless operation while actually reducing overall system complexity by eliminating the need for additional control wiring and mechanical switches.
Data Source
AI summary
A light-emitting diode (LED) luminaire control system comprising a control circuit is adopted to provide remote control signals to operate an external luminaire that comprises LED arrays and a power supply. The LED luminaire control system further comprises a relay switch, a remote controller, and a transceiver circuit. When the remote control signals are initiated by the remote controller with phase-shift keying (PSK) signals transmitted, the transceiver circuit can demodulate such PSK signals and subsequently send decoded commands to the LED luminaire control system to control the luminaire by turning on and off and dimming up and down the external luminaire.