Motor vehicle headlamp

Details Motor vehicle headlamp Motor vehicle headlamp

1991-08-20

1992-04-21

Husar, Stephen F.

Illumination

Vehicle steering mechanism or element moves pivoted lamp or...

Tie rod element controlled

362221, 362265, B60Q 104

Patent

active

051074052

ABSTRACT:
A motor vehicle headlamp with a discharge lamp as its light source in which electromagnetic noise produced by the discharge lamp or by the glow switch starter and which leaks out of the headlamp is eliminated. A lighting circuit unit is provided which includes a casing on the inner surface of which an electrically conductive layer is formed for shielding electromagnetic noise, and a lighting circuit for the discharge bulb accommodated in the casing and coupled to the rear end portion of a lamp body. In another embodiment, the rear end portion of a lamp body, on the inner surface of which an electrically conductive grounding layer is formed, is formed into a noise shielding chamber closed with a partition board capable of blocking electromagnetic noise, and a lighting circuit for the discharge bulb is accommodated in the noise shielding chamber.

REFERENCES:
patent: 4714986 (1987-12-01), Wurster
patent: 4897767 (1990-01-01), T'Jampens
patent: 4920459 (1990-04-01), Rothwell, Jr. et al.

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