Vehicle headlamp beam control

Details Vehicle headlamp beam control Vehicle headlamp beam control

1984-05-24

1986-07-08

Dixon, Harold

Electric lamp and discharge devices: systems

Special application

Vehicle

307 10LS, 315 82, B60Q 102

Patent

active

045995443

ABSTRACT:
A control for a motor vehicle headlamp system includes a silicon photovoltaic diode in a short circuit connection across the inputs of an operational amplifier. The diode is disposed behind a lens and baffle to respond only to the light from oncoming vehicles and not to that reflected from roadside objects. The output of the operational amplifier is applied either directly or through an operator adjustable voltage divider to one input of a comparator having a predetermined reference voltage at its other input. The output of the comparator controls the selection of upper or lower beam generators and also switch means to switch in or out the voltage divider so as to provide hysteresis in system operation with the lower-to-upper beam switching level independent of the operator controlled upper-to-lower beam switching level.

REFERENCES:
patent: 1917532 (1933-07-01), Lowenstein
patent: 2679616 (1954-05-01), Onksen et al.
patent: 2742592 (1956-04-01), Miller et al.
patent: 2965798 (1960-12-01), Cade
patent: 3177397 (1965-04-01), Keeran
patent: 3381169 (1968-04-01), Brock et al.
patent: 3775639 (1973-11-01), Woodward
patent: 4117453 (1978-09-01), Hodgson et al.

Affiliated with

Also associated with

Rating

Vehicle headlamp beam control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vehicle headlamp beam control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vehicle headlamp beam control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1453502