Patent ID: 7364332
Filing Date: 2008-04-29
Classification: B60Q,F21S,F21V,F21W

Abstract:
1. A vehicle headlamp comprising: a projection lens provided on an optical axis extended in a longitudinal direction of the vehicle; a light source provided rear of a focal point on a rear side of the projection lens; a reflector which reflects light forwardly from the light source toward the optical axis, the light source comprises a light emitting portion of a light bulb which is inserted and fixed into the reflector from a side of the optical axis in a position placed downward from the optical axis, and a light transmitting member disposed between the projection lens and the reflector, where a direct light emitted from the light source directly toward an upper space of the projection lens is deflected by the light transmitting member and irradiated downwardly in the vicinity of an upper end of an outer peripheral edge portion of the projection lens, wherein a part of light, which is emitted from the light bulb and reflected at an optical-axis side region of a reflecting plane of the reflector, is irradiated through the projection lens, and said optical axis side region comprises a side part region of the reflector that is intersected with an imaginary horizontal plane which includes the optical axis, and the position where said light bulb is inserted and fixed into the reflector is provided beneath said side part region, wherein an additional reflector for reflecting the direct light from the light source toward an incidence plane of the light transmitting member is provided on a rear side of the light transmitting member, a vertical sectional shape of a reflecting plane of the additional reflector is set to be a hyperbolic shape in which a predetermined point positioned above the optical axis acts as a conjugate focal point with the light source, and a vertical sectional shape of the incidence plane of the light transmitting member is set to be a shape of a circular arc with the predetermined point to be a center and a vertical sectional shape of an emitting plane of the light transmitting member is set to be an elliptical shave with the predetermined point to be a focal point.