Patent ID: 7699513
Filing Date: 2010-04-20
Classification: F21S,F21W

Abstract:
1. A projector-type lamp unit for a vehicle, the projector-type lamp unit comprising: a projection lens disposed on an optical axis extending in a front-and-rear direction of the vehicle; a light source disposed on a rear side of a rear focal point of the projection lens; a reflector configured to forwardly reflect light emitted from the light source toward the optical axis; and a shade configured to shield a part of the light reflected by the reflector, wherein the projector-type lamp unit is configured to form a light distribution pattern having a cutoff line, wherein the cutoff line is an inverted projection image of an upper edge of the shade, wherein an incidence plane of the projection lens comprises a first vertical diffusing portion which regulates the cutoff line, wherein the first vertical diffusing portion comprises a plurality of first lens elements extending substantially parallel to a horizontal portion of the upper edge of the shade, and wherein a vertical section of each of the first lens elements is a convex or concave with respect to a reference surface of the incidence plane.