Automatic control device for lighting and extinction of headlamps in a vehicle
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United States of America Patent
Stats
-
Nov 2, 1982
Grant Date -
N/A
app pub date -
Nov 5, 1980
filing date -
Nov 7, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic control device for the lighting and extinction of headlamps of car, comprising at least two photo-sensitive elements connected to control circuits defining luminosity thresholds to produce control signals depending on ambient luminosity, and a logic control circuit receiving said control signals to control the three levels of headlamps of the vehicle. Said logic control circuit comprises further photo-sensitive elements connected to further control circuit means and input and output means to receive and produce control signals respectively. The automatic control system selectively provides automatic operation or manual operation or semi-manual operation. It is associated with a system for monitoring reflected light to eliminate influence of extraneous light reflections from obstacles as the vehicle moves on the road. The combination of the automatic control system for lighting and extinguishing headlamps with the reflected light monitoring system permits significant improvement of the driving safety, resulting from the automatic functioning of the vehicle lamps.
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