Automatic headlamp dimming system
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United States of America Patent
Stats
-
Aug 29, 1989
Grant Date -
N/A
app pub date -
Dec 24, 1987
filing date -
Dec 24, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for automatically responding to headlamp radiation from oncoming vehicles to down-switch beam patterns in a tri-beam headlamp system in an automotive vehicle. A mid-beam sensor is provided to detect only that headlamp radiation from oncoming vehicles present within the defined high intensity projection areas of the mid-beam pattern and functions in conjunction with a conventional automatic dimmer sensor and a unique control circuit to achieve appropriate and automatic down-switching.
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