US 10,342,094 B1
Lighting device with active thermal management
Corey Goldstein, Milwaukee, WI (US); and Kurt Wilcox, Libertyville, IL (US)
Assigned to Cree, Inc., Durham, NC (US)
Filed by Cree, Inc., Durham, NC (US)
Filed on Dec. 19, 2017, as Appl. No. 15/846,306.
Int. Cl. H05B 37/02 (2006.01); H05B 33/08 (2006.01); F21K 9/61 (2016.01)
CPC H05B 33/0884 (2013.01) [F21K 9/61 (2016.08); H05B 37/0227 (2013.01); H05B 37/0245 (2013.01); H05B 37/0272 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A lighting device comprising at least one LED operable to emit light when energized through an electrical path, comprising:
a temperature sensitive component having a temperature limit;
a driver in the electrical path for controlling current delivered to the at least one LED, the driver comprising a temperature sensor for determining a temperature of the driver and not the temperature of the temperature sensitive component, the temperature of the driver being different than the temperature of the temperature sensitive component; and
a controller storing a correlated temperature limit of the driver, the controller controlling the driver to reduce the current delivered to the at least one LED when a correlated temperature limit is reached, the correlated temperature limit being related to the temperature limit whereby overheating of the temperature sensitive component is prevented.