Headlight assembly for a vehicle

Details Headlight assembly for a vehicle Headlight assembly for a vehicle

1991-07-29

1993-03-16

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Special application

Vehicle

315 83, 307 108, B60Q 102, B60L 114

Patent

active

051947790

ABSTRACT:
A headlight assembly including a pair of headlight units each having first and second headlights. The first headlight has a halogen bulb having a high-beam filament for illuminating a range faraway from the vehicle and an auxiliary low-beam filament for illuminating a range in the vicinity of the vehicle. The second headlight has a discharge bulb for a low-beam for illuminating a range in the vicinity of the vehicle. The headlight assembly further includes a lighting control circuit for controlling lighting and turning-off of these headlights in such ways that both the bulbs of the first and second lamps are lighted during main lighting which illuminates the range faraway from the vehicle with a high-beam and the range close to the vehicle with a low-beam, that the bulbs of the second headlights are lighted during dimmer lighting which illuminates the range in the vicinity of the vehicle with a low-beam, and that only the bulbs of the first headlights are lighted during passing. The headlight assembly further includes a detector provided in the lighting control circuit for detecting that either of the discharge bulbs of the second headlights of the headlight units is unlighted or turned-off, and a relay provided in the lighting control circuit for supplying electrical power to the auxiliary low-beam filament of the first headlight of the headlight unit when the detector detects that the discharge bulb of the second headlight of the headlight unit is unlighted or turned-off, to cause the auxiliary low-beam filament to illuminate.

REFERENCES:
patent: 3558972 (1971-01-01), Arai
patent: 3702415 (1972-11-01), Schultz
patent: 4495444 (1985-01-01), Thomas
patent: 4513357 (1985-04-01), Nieda et al.
patent: 4857754 (1989-08-01), Yamamoto

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