Patent ID: 8491171
Filing Date: 2013-07-23
Classification: F21S,F21W,F21Y

Abstract:
1. A vehicle headlamp whose semiconductor-type light source is used as a light source, the vehicle headlamp comprising: a reflector having a main reflection surface that is made up of a parabolic free-curved face; a semiconductor-type light source having a light emitting chip; and a light shading member, wherein: the main reflection surface is a main reflection surface which is disposed in a space at a side opposite to the light emitting surface of the light emitting chip and which is adapted to reflect light radiated from the light emitting surface of the light emitting chip and then emit the reflected light to a forward direction of a vehicle in a predetermined main light distribution pattern; the light shading member which is disposed in at least a space other than an optical path which is emitted with light from the main reflection surface to the forward direction of the vehicle and is adapted to shade light directly radiated from the light emitting surface of the light emitting chip to the forward direction of the vehicle; on the light shading member, there is provided: a first additional reflection surface that is made up of an elliptical free-curved face in which a first reference focal point is positioned at or near a reference focal point of the main reflection face and a second reference focal point is positioned on a reference optical axis of the main reflection surface and a horizontal axis orthogonal to the vertical axis or at an opposite side to a side opposing to a light emitting surface of the light emitting chip of the horizontal axis, the first additional reflection surface being adapted to converge and reflect light directly radiated from the light emitting surface of the light emitting chip to the forward direction of the vehicle on the second reference focal point; and at a site other than the main reflection surface and at an opposite side to a side opposing to the light emitting surface of the light emitting chip of the main reflection surface, of the reflector, there is provided a second additional reflection surface that is made up of a parabolic free-curved face in which a reference focal point is positioned at or near a second reference focal point of the first additional reflection surface, the second additional reflection surface being adapted to reflect reflected light from the first additional reflection surface and then emit the reflected light to the forward direction of the vehicle in a predetermined additional light distribution pattern.