Patent ID: 7726857

Claim:
A lamp unit for a headlamp of a vehicle, the lamp unit comprising: a projection lens disposed on an optical axis of the lamp unit; a light emitting device disposed on a rear side of a rear focal point of the projection lens; a reflector disposed so as to cover an upper side of the light emitting device; and a mirror member comprising an upwardly reflecting surface arranged between the reflector and the projection lens such that a front edge of the upwardly reflecting surface passes through the rear focal point of the projection lens, wherein the reflector forwardly reflects light from the light emitting device toward the optical axis, wherein the upwardly reflecting surface upwardly reflects part of the light reflected by the reflector, wherein the upwardly reflecting surface comprises: a first horizontal surface disposed on a self-lane side of the optical axis; a second horizontal surface disposed on an opposing-lane side of the optical axis, wherein the second horizontal surface is parallel to the first horizontal surface and lower than the first horizontal surface; and an intermediate slope surface connecting the first horizontal surface and the second horizontal surface, and wherein the intermediate slope surface comprises: a front slope surface rearwardly extending from a portion of the front edge of the upwardly reflecting surface; and a rear slope surface rearwardly extending from a rear end of the front slope surface, wherein the rear slope surface is curved such that a virtual edge extending rearward from a boundary between the first horizontal surface and the front slope surface at the front edge of the intermediate slope surface is rounded.