Radio-frequency lighting control system with occupancy sensing
First Claim
1. A load control device for controlling the power delivered from an AC power source to an electrical load provided in a space having at least two occupancy sensors, the load control device comprising:
- a controllably conductive device adapted to be coupled in series electrical connection between the AC power source and the electrical load for control of the power delivered to the electrical load;
a wireless receiver for receiving wireless control signals from the occupancy sensors, the wireless control signals comprising an occupied wireless control signal indicating an occupancy condition in the space and a vacant wireless control signal indicating a vacancy condition in the space;
a controller operatively coupled to the controllably conductive device and the wireless receiver for controlling the power delivered to the electrical load in response to the wireless control signals; and
a memory coupled to the controller, the controller configured to store a unique identifier of each occupancy sensor in the memory;
wherein the controller is configured to enable the delivery of power to the electrical load in response to receiving the occupied wireless control signal from at least one of the occupancy sensors, and cease the delivery of power to the electrical load in response to receiving vacant control signals from both of the occupancy sensors, the controller configured to mark the unique identifier of each occupancy sensor from which the controller receives the occupied wireless control signal as occupied and mark the unique identifier of each occupancy sensor from which the controller receives the vacant wireless control signal as vacant, the controller configured to cease the delivery of power to the electrical load when the unique identifiers for both of the occupancy sensors are marked as vacant.
1 Assignment
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Accused Products
Abstract
A load control system controls an electrical load provided in a space and comprises a load control device and one or more occupancy sensors. The load control device controls the load in response to the wireless control signals received from the occupancy sensors. Each occupancy sensor transmits an occupied control signal to the load control device in response to detecting an occupancy condition in the space and a vacant control signal to the load control device in response to detecting a vacancy condition. The load control device turns on the load in response to receiving the occupied control signal from at least one of the occupancy sensors, and turns off the load in response to receiving vacant control signals from both of the occupancy sensors. The load control device is operable to determine that no wireless control signals have been received from the occupancy sensors for the length of a predetermined timeout period and to subsequently turn off the load.
163 Citations
22 Claims
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1. A load control device for controlling the power delivered from an AC power source to an electrical load provided in a space having at least two occupancy sensors, the load control device comprising:
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a controllably conductive device adapted to be coupled in series electrical connection between the AC power source and the electrical load for control of the power delivered to the electrical load; a wireless receiver for receiving wireless control signals from the occupancy sensors, the wireless control signals comprising an occupied wireless control signal indicating an occupancy condition in the space and a vacant wireless control signal indicating a vacancy condition in the space; a controller operatively coupled to the controllably conductive device and the wireless receiver for controlling the power delivered to the electrical load in response to the wireless control signals; and a memory coupled to the controller, the controller configured to store a unique identifier of each occupancy sensor in the memory; wherein the controller is configured to enable the delivery of power to the electrical load in response to receiving the occupied wireless control signal from at least one of the occupancy sensors, and cease the delivery of power to the electrical load in response to receiving vacant control signals from both of the occupancy sensors, the controller configured to mark the unique identifier of each occupancy sensor from which the controller receives the occupied wireless control signal as occupied and mark the unique identifier of each occupancy sensor from which the controller receives the vacant wireless control signal as vacant, the controller configured to cease the delivery of power to the electrical load when the unique identifiers for both of the occupancy sensors are marked as vacant. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A load control system for controlling the amount of power delivered from an AC power source to an electrical load provided in a space, the load control system comprising:
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a load control device adapted to be coupled in series electrical connection between the AC power source and the electrical load for control of the amount of power delivered to the electrical load, the load control device operable to receive wireless control signals and to control the amount of power delivered to the electrical load in response to the wireless control signals; two occupancy sensors, each operable to independently detect an occupancy condition in the space and to transmit a vacant wireless control signal to the load control device in response to detecting a vacancy condition in the space; and a remote control comprising an actuator and operable to transmit an actuator wireless control signal to the load control device in response to an actuation of the actuator; wherein the load control device is configured to enable the delivery of power to the electrical load in response to receiving the actuator wireless control signal from the remote control, and cease the delivery of power to the electrical load in response to receiving vacant control signals from both of the occupancy sensors, the load control device configured to store a unique identifier of each occupancy sensor in a memory, the load control device configured to mark the unique identifier of each occupancy sensor from which the load control device receives the occupied wireless control signal as occupied and mark the unique identifier of each occupancy sensor from which the load control devices receives the vacant wireless control signal as vacant, the load control device configured to cease the delivery of power to the electrical load when the unique identifiers for both of the occupancy sensors are marked as vacant. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A load control system for controlling the amount of power delivered from an AC power source to an electrical load provided in a space, the load control system comprising:
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a load control device adapted to be coupled in series electrical connection between the AC power source and the electrical load for control of the amount of power delivered to the electrical load, the load control device operable to receive wireless control signals and to control the amount of power delivered to the electrical load in response to the wireless control signals; a remote control comprising an actuator and operable to transmit a first wireless control signal to the load control device in response to an actuation of the actuator; and an occupancy sensor operable to detect an occupancy condition in the space and to transmit a second wireless control signal to the load control device in response to detecting a continued occupancy condition in the space, the occupancy sensor comprising an occupancy timer; wherein the load control device is operable to enable the delivery of power to the electrical load in response to receiving the first wireless control signal from the remote control, the load control device further operable to determine that no wireless control signals have been received from the remote control or the occupancy sensor for the length of a predetermined timeout period and to subsequently cease the delivery of power to the electrical load; and wherein on the expiration of the occupancy timer, the occupancy sensor is operable to transmit a vacant wireless control signal to the load control device, the load control device configured to mark the occupancy sensor as vacant in response to receiving the vacant wireless control signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification