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US 6,672,747 B2Granted
Vehicle headlamp having removable lighting control unit
AssigneeDenso Corporation
InventorsHiranao Yamaguchi, Koichi Toyama
Life of this patent
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Abstract
In a headlamp for a vehicle, a lighting control circuit unit is provided in a lamp housing. The lighting control circuit unit is fixed to a holder with screws and the holder is fixed to a rear surface of a reflector with screws. A discharge lamp bulb is held on the reflector. The discharge lamp bulb is directly connected to the lighting control circuit unit. The lighting control circuit unit is removable through an opening of the lamp housing in a state that the discharge lamp bulb is held on the reflector. Also, the discharge lamp bulb is exchangeable through the opening.
Claims11
A headlamp for a vehicle comprising:
- a discharge lamp bulb;
- a reflector for reflecting light emitted from the discharge lamp bulb in a predetermined direction, the reflector holding the discharge lamp bulb and;
- a lighting control circuit unit for driving the discharge lamp bulb, the lighting control circuit unit being directly connected to the discharge lamp bulb;
- a lamp housing enclosing the discharge lamp bulb, the reflector and the lighting control circuit unit and having an opening;
- and
- a cover fitted on the opening of the lamp housing for air-tightly sealing the lamp housing,
- wherein the lighting control circuit unit is removable through the opening in a state that the discharge lamp bulb is held on the reflector.
4 more elements
Dependencies are inferred from the claim text.