Patent ID: 9188298
Filing Date: 2015-11-17
Classification: F21S

Abstract:
1. A vehicle lighting unit having an optical axis, comprising: a solid light guide having a light exiting surface, a reflection surface opposite to the light exiting surface, and a light incident surface through which light enters the light guide, the light guide configured such that light entering via the light incident surface reaches and is internally reflected off the light exiting surface, then internally reflected off the reflection surface, and exits through the light exiting surface; and an LED light source disposed to face forward and obliquely downward with respect to the optical axis and towards the light incident surface, the light source configured to emit light that enters the light guide through the light incident surface, is internally reflected off the light exiting surface, is internally reflected off the reflection surface, and exits through the light exiting surface as light parallel to the optical axis, wherein the light exiting surface is a continuous surface that is only one of a parabola and a straight line including a region for internally reflecting the light entering through the light incident surface and a region through which the light internally reflected exits as the light parallel to the optical axis.