Ambient light sensor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 28, 2002
Grant Date -
N/A
app pub date -
Aug 4, 2000
filing date -
Oct 12, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved ambient light sensor 20 is provided. Light 105 passes to at least two photosensors 30, 35 with different peak response frequencies. A controller 80 accepts output signals from the photosensors 30, 35 and operates vehicle systems (e.g., headlights 70 or environmental controls 75) accordingly. The controller 80 may distinguish between natural and artificial light, so that headlights 70 are illuminated while a vehicle passes through a well lit tunnel, or is exposed to lights from another vehicle.
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