Lighting system control via ac power lines
AssigneeDMF, Inc.
InventorsRussikesh Kumar, Ketan Lakhera, Oren Kashani
Life of this patent
Estimating the term…
Abstract
A gateway controls a portion of lighting fixtures within a lighting system in response to a first digital signal and comprises a power input port to receive AC power, a power line filter to filter electrical noise from the received AC power, a power output port to output the filtered AC power to the portion of lighting fixtures, an input signal port to receive the first digital signal, an output signal port to pass the received first digital signal to a second gateway, a local controller, a first transceiver coupled to the input signal port to receive the first digital signal, and a second transceiver coupled to the power output port to couple the second digital signal to the power output port.
Claims25
A lighting fixture for a lighting system in which intensity and color temperature of a light that is output by the lighting fixture are controllable, the lighting fixture comprising:
- a light source to output the light having the intensity and the color temperature controlled by the lighting fixture;
- a driver coupled to a power line to receive AC power, the driver outputting DC power to the light source;
- a transceiver coupled to the power line to receive control signals from the power line, the control signals comprising a plurality of data packets;
- and
- a controller coupled to the transceiver and to the driver, wherein the controller is configured to:
- detect at least one of header information or a checksum value for a first data packet of the plurality of data packets;
- and
- evaluate at least one of the header information or the checksum value detected for the first data packet to determine whether the first data packet is received with error or without error.
A method of operating a lighting fixture for a lighting system in which intensity and color temperature of a light that is output by the lighting fixture are controlled, the method comprising:
- receiving AC power and control signals for the lighting fixture from a power line;
- receiving, by a transceiver of the lighting fixture, the control signals from the power line, the control signals comprising a plurality of data packets;
- detecting, by a controller of the lighting fixture, at least one of header information or a checksum value for a first data packet of the plurality of data packets;
- evaluating, by the controller, at least one of the header information or the checksum value detected for the first data packet to determine whether the first data packet is received with error or without error;
- outputting, by a driver of the lighting fixture that is coupled to the power line to receive AC power from the power line, DC power to a light source of the lighting fixture;
- and
- outputting, from the light source, the light having the intensity and the color temperature controlled by the lighting fixture.
A lighting fixture for a lighting system in which intensity and color temperature of a light that is output by the lighting fixture are controllable, the lighting fixture comprising:
- a light source to output the light having the intensity and the color temperature controlled by the lighting fixture;
- a driver coupled to a power line to receive AC power, the driver outputting DC power to the light source;
- a transceiver coupled to the power line to receive control signals from the power line, the control signals comprising a plurality of data packets;
- and
- a controller coupled to the transceiver and to the driver, wherein the controller is configured to:
- detect at least one of header information or a checksum value for a first data packet of the plurality of data packets;
- evaluate at least one of the header information or the checksum value detected for the first data packet to determine whether the first data packet is received with error or without error;
- receive an instruction to operate as a repeater for a plurality of lighting fixtures connected to the power line;
- and
- retransmit at least one control signal of the control signals that are received from the power line in response to receiving the instruction to operate as a repeater.
Dependencies are inferred from the claim text.