Method and device for automatically switching on or off the lights of a vehicle
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United States of America Patent
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Feb 11, 2003
Grant Date -
N/A
app pub date -
Feb 9, 2001
filing date -
May 18, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and device to automatically switch on and off the lights of a motor vehicle. The driving speed of the vehicle and the brightness readings from three light sensor cones of different sizes and directed in different directions are determined. The lights are switched either on or off based upon comparing the speed and three brightness readings to a set of possible conditions for each of the variables as the vehicle operates. The driving distance and time interval are also variables considered in determining whether to switch the lights on or off. Unnecessary on and off switching is avoided.
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