Driver arrangement for a LED lighting device, a lighting device using the same and a drive method
AssigneeSignify Holding B.V.
InventorJie Fu
Life of this patent
Estimating the term…
Abstract
A driver arrangement is provided for a LED lighting device with a LED light source and at least one additional auxiliary module. The driver arrangement comprises separate main and auxiliary drivers. The delivery of power from the auxiliary driver is controlled to either an auxiliary power output or to both a main power output and the auxiliary power output. Each driver can be optimized for the load it is required to drive. The device may overall be more efficient in a low power auxiliary mode, by using a driver suited for such low power operation. In particular when the power demand of the LED light source is low, the auxiliary driver may be used.
Claims14
A driver arrangement for a LED lighting device with a LED light source and at least one additional auxiliary module, the driver arrangement comprising:
- a main power output for providing power to the LED light source;
- a main LED driver having a main power conversion circuit, the main LED driver connected to the main power output;
- an auxiliary power output for providing power to the at least one additional auxiliary module;
- an auxiliary driver, wherein the auxiliary driver has an auxiliary power conversion circuit independent from the main LED driver;
- and
- a controller for controlling a ratio of delivery of power from the auxiliary driver to the main power output and the auxiliary power output;
- wherein the controller is adapted to
- communicate over a command connection to receive a dimming command of the main LED driver;
- and
- control the auxiliary driver alone to provide power to the LED light source and not use the main LED driver when the output power of the LED light source is set, in accordance with the dimming command, lower than a threshold value, wherein the auxiliary driver has a higher efficiency than that of the main LED driver at the set output power, and the main LED driver and the auxiliary driver are both adapted to power the LED light source from an AC mains.
A LED lighting device comprising:
- a LED light source;
- at least one additional auxiliary module;
- and
- a driver arrangement including,
- a main power output for providing power to the LED light source;
- a main LED driver having a main power conversion circuit, the main LED driver connected to the main power output;
- an auxiliary power output for providing power to the at least one additional auxiliary module;
- an auxiliary driver, wherein the auxiliary driver has an auxiliary power conversion circuit independent from the main LED driver;
- and
- a controller for controlling a ratio of delivery of power from the auxiliary driver to the main power output and the auxiliary power output, wherein the controller is adapted to communicate over a command connection to receive a dimming command of the main LED driver and control the auxiliary driver alone to provide power to the LED light source and not use the main LED driver when the output power of the LED light source is set, in accordance with the dimming command, lower than a threshold value, wherein the auxiliary driver has a higher efficiency than that of the main LED driver at the set output power, and the main LED driver and the auxiliary driver are both adapted to power the LED light source from an AC mains;
- wherein said at least one additional auxiliary module is adapted to regulate its input power from the auxiliary driver at the auxiliary power output.
A method of controlling a supply of power from a driver arrangement to a LED lighting device with a LED light source and to at least one additional auxiliary module, the method comprising:
- providing power to the LED light source using a main LED driver having a main power conversion circuit;
- providing power to the at least one additional auxiliary module using an auxiliary driver, wherein the auxiliary driver has an auxiliary power conversion circuit independent from the main LED driver;
- communicating over a command connection to receive a dimming command of the main LED driver;
- and
- selectively controlling a ratio of delivery of power from the auxiliary driver to the at least one additional auxiliary module and the LED light source, wherein controlling the auxiliary driver alone to provide the power to the LED light source and not use the main LED driver when the output power of the LED light source is set, in accordance with the dimming command, lower than a threshold value, wherein the auxiliary driver has a higher efficiency than that of the main LED driver at the set output power, and the main LED driver and the auxiliary driver are both adapted to power the LED light source from an AC mains.
Dependencies are inferred from the claim text.