Photosensor employing a fiber optic collector

A lighting control system for a light fixture has an ambient light sensor mounted therein. A switching circuit provides power for driving lighting sources. A controller receives signals from the light sensor and regulates switching frequencies based on desired lighting output level and the ambient l...

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Bibliographische Detailangaben
Hauptverfasser:	Berry Travis L, Cavacuiti John, Mahaffey Rob
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COLORIMETRY ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED LIGHTING MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING MECHANICAL ENGINEERING PHYSICS RADIATION PYROMETRY STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TESTING WEAPONS
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Beschreibung
Zusammenfassung:	A lighting control system for a light fixture has an ambient light sensor mounted therein. A switching circuit provides power for driving lighting sources. A controller receives signals from the light sensor and regulates switching frequencies based on desired lighting output level and the ambient light condition. An ambient lighting channel extends from the ambient light sensor to an aperture between outer and inner surfaces of the housing. The ambient lighting channel may include a fiber optic light pipe which extends from the aperture to surround the light sensor. The fiber optic light pipe may extend through the aperture from the ambient light sensor to an ambient light source external to the light fixture. The light sensor may mount on a shared PCB with respect to the lighting sources, such as an LED array, and transmit ambient lighting information to the controller via a feedback loop.