Lighting unit and vehicle headlamp

摘要

A lighting unit (1) is provided with a reflecting surface (2, 2′, 2″) for providing an output beam of light with at least two beam patterns. A first light source (5) and a second light source (7) are arranged to illuminate substantially identical surface areas of said reflecting surface (2, 2′, 2″) and are independently controllable from each other. The reflecting surface (2, 2′, 2″) is shaped and said light sources (5, 7) are positioned relative to said reflecting surface (2, 2′, 2″) so that said first light source (5) generates an output beam of light, having a first beam pattern and said at least second light source (7) generates an output beam of light, having a second beam pattern, different from said first beam pattern. A corresponding vehicle headlamp (10) comprises at least one lighting unit (1).

主权项

1. A lighting unit, comprising:
a reflecting surface for providing an output beam of light, said reflecting surface comprising a freeform or complex-shape reflector, a first light source arranged to illuminate a first surface area of said reflecting surface and at least a second light source arranged to illuminate a second surface area of said reflecting surface, wherein:
said second surface area is substantially identical to said first surface area,said first and second light sources are positioned in a direction perpendicular to an optical axis of said reflecting surface,said reflecting surface is shaped and said light sources are positioned relative to said reflecting surface so that said first light source generates an output beam of light having a first beam pattern with a substantially horizontal bright/dark cut-off, and said at least second light source generates an output beam of light having a second beam pattern different from said first beam pattern and has no horizontal bright/dark cut-off, andsaid first light source and said second light source are independently controllable from each other to be able to provide the first beam pattern independent of the second beam pattern, to provide the second beam pattern independent of the first beam pattern, and to provide both first and second beam patterns simultaneously.