Patent ID: 8757846
Filing Date: 2014-06-24
Classification: F21S,F21Y

Abstract:
1. A lamp unit for forming a light distribution pattern having a given cutoff line in an upper end portion thereof, comprising: a light source; and a transparent member configured to receive light from the light source from rearward of the transparent member and to project the light distribution pattern forward of the transparent member, wherein the transparent member includes a front surface, a rear surface, and a rearward incident surface which faces the light source, wherein the transparent member is configured to reflect, by the front surface, the light that enters the transparent member from rearward of the transparent member, then to reflect again the light forward of the transparent member by the rear surface, and then to radiate the light from the front surface; and wherein the rearward incident surface is configured to refract, toward the front surface, the light going from the light source directly to the rear surface.