US 11,867,386 B2
Active thermal-control of a floodlight and associated floodlights
Ihab A. Ali, Cupertino, CA (US); and Duen Hsing Hsieh, Tapiei (TW)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on May 10, 2022, as Appl. No. 17/662,827.
Application 17/662,827 is a continuation of application No. 17/178,804, filed on Feb. 18, 2021, granted, now 11,346,539.
Prior Publication US 2022/0268434 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 29/70 (2015.01); F21V 33/00 (2006.01); F21V 29/87 (2015.01); H05B 45/18 (2020.01); F21V 23/02 (2006.01); F21Y 115/10 (2016.01)
CPC F21V 29/70 (2015.01) [F21V 23/02 (2013.01); F21V 29/87 (2015.01); F21V 33/0052 (2013.01); H05B 45/18 (2020.01); F21Y 2115/10 (2016.08)] 20 Claims
OG exemplary drawing
 
1. A floodlight comprising:
a light-emitting diode (LED) array configured to illuminate;
one or more sensors;
one or more thermistors configured to monitor one or more temperatures within the floodlight;
a first heat-transfer subsystem to transfer heat from the LED array to a first housing component containing the LED array;
a second heat-transfer subsystem to transfer heat from one or more power supply units to a second housing component;
a microcontroller configured to:
determine, based on temperature readings from the one or more thermistors, a temperature profile of the floodlight; and
adjust, based on the temperature profile, electrical power supplied by a power supply unit subsystem to maintain:
a first temperature of a first thermal zone at or below a first prescribed temperature threshold, the first thermal zone including a first power supply unit configured to supply electrical power to the LED array; and
a second temperature of a second thermal zone at or below a second prescribed temperature threshold, the second thermal zone including a second power supply unit configured to supply electrical power to the one or more sensors.