Motor vehicle headlamp having a discharge lamp with masks and a multi-zone reflector
First Claim
1. A motor vehicle headlamp comprising a discharge lamp, a reflector adjacent to the discharge lamp, and a cover lens in front of the reflector, the cover lens being at least approximately smooth, the headlamp defining a cut-off line and the reflector being adapted to reflect light from the discharge lamp whereby to generate a beam below the said cut-off line, the headlamp further including at least two masks associated with the discharge lamp and defining two shadow zones on the reflector, the reflector including at least two reflective zones for forming portions of the beam below the said predetermined cut-off line with different degrees of widthwise spreading, the reflector defining generally radial transition planes separating the said reflective zones, with at least some of the said transition planes extending into the said shadow zones.
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Accused Products
Abstract
A motor vehicle headlamp has a discharge lamp, a reflector and a smooth or nearly smooth cover lens, the reflector being adapted to generate a beam below a cut-off line. At least two masks are associated with the discharge lamp, and define two shadow zones on the reflector; the reflector includes at least two reflective zones for forming portions of the beam below the cut-off line, with different amounts of sideways spreading of the light; and these zones of the reflector are separated by generally radial transition planes, at least some of which extend into the shadow zones. A particular application is to enable wide cruising beams to be produced to European standards without any optical anomalies.
21 Citations
27 Claims
- 1. A motor vehicle headlamp comprising a discharge lamp, a reflector adjacent to the discharge lamp, and a cover lens in front of the reflector, the cover lens being at least approximately smooth, the headlamp defining a cut-off line and the reflector being adapted to reflect light from the discharge lamp whereby to generate a beam below the said cut-off line, the headlamp further including at least two masks associated with the discharge lamp and defining two shadow zones on the reflector, the reflector including at least two reflective zones for forming portions of the beam below the said predetermined cut-off line with different degrees of widthwise spreading, the reflector defining generally radial transition planes separating the said reflective zones, with at least some of the said transition planes extending into the said shadow zones.
Specification