Active thermal-control of a floodlight and associated floodlights
AssigneeGoogle Inc.
InventorsIhab A. Ali, Duen Hsing Hsieh
Life of this patent
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Abstract
This document describes techniques directed to active thermal-control of a floodlight and associated floodlights. As described, an example floodlight includes a first heat-transfer subsystem that uses a fully enclosed heat sink to transfer heat from an array of LEDs to a first housing component of the floodlight. The floodlight further includes a second heat-transfer subsystem to transfer heat from one or more PSUs to a second housing component of the floodlight. Described techniques include using thermistors located throughout the floodlight to actively monitor a temperature profile within the floodlight and, if one or more operating-temperature thresholds are violated, reducing power consumption within the floodlight.
Claims20
A floodlight comprising:
- a light-emitting diode (LED) array;
- at least one sensor, the at least one sensor comprising one or more heat sensors 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;
- logic circuitry configured to:
- determine, based on temperature readings from the one or more heat sensors, a temperature profile of the floodlight;
- and
- adjust, based on the temperature profile, electrical power supplied to at least one of the LED array or the at least one sensor to maintain:
- a first temperature of a first thermal zone at or below a first prescribed temperature threshold, the first thermal zone including 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 the at least one sensor.
Dependencies are inferred from the claim text.