Patent ID: 7311430
Filing Date: 2007-12-25
Classification: F21S,F21Y

Abstract:
1. A lamp unit of a vehicle headlamp comprising: a projection lens arranged on an optical axis extending in a front/rear direction of a vehicle; a first light source unit arranged behind the projection lens and including a first light-emitting element arranged upward, a first reflector for reflecting light from the first light-emitting element in forward direction, and a straight advancement interrupting member, having an upper end edge arranged to pass near a rear focal point of the projection lens, for interrupting a part of the reflected light from the first reflector; a second light source unit arranged behind the projection lens and including a second light-emitting element arranged downward, and a second reflector for reflecting light from the second light-emitting element in forward direction, the second reflector including a reflecting face of a vertical cross-sectional shape formed by an ellipse having a first focal point in proximity to the second light-emitting element and a second focal point on a point between the second light-emitting element and the projection lens; and an additional projection lens arranged on a circumference of the projection lens and having an additional optical axis extending substantially in parallel with the optical axis and a rear focal point in proximity to the second focal point.