Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy control of an electric discharge device in...
Patent
1993-12-10
1995-04-11
Pascal, Robert J.
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Radiant energy control of an electric discharge device in...
315158, 315159, 315307, 315DIG7, H05B 3702
Patent
active
054061733
ABSTRACT:
A device for controlling the level of light in an area or room. The device includes a sensor that detects whether the room is occupied, a light meter that detects the level of ambient light entering the room, and circuitry that controls the lights in the room in response to the sensor and light meter. The controlling circuitry increases the light level in the room when the room is occupied and the light meter senses that the ambient light level is not above a particular level. When the room is unoccupied for a brief period of time, the device increases or decreases the light level of the room by controlling lights accordingly, in response to the level of light sensed by the light meter. And finally, when the room is unoccupied for an extended period of time, the device turns power off to all the lights in the room.
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Philips Lighting Sep. 1990 p. 2.
"Lite-Miser" Brochure.
Hu Charles C.
McCuen Kenneth A.
Mix Jerome M.
Sprout James C.
Pascal Robert J.
Philogene Haissa
The Watt Stopper
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