Patent ID: 8480266
Filing Date: 2013-07-09
Classification: B60Q,F21S,G02B

Abstract:
1. A vehicle light unit comprising: an LED light source having an optical axis; and a solid lens body including a first lens part, a second lens part, and a third lens part, wherein the first lens part is a converging lens part disposed in front of the LED light source and on the optical axis thereof, the converging lens part configured to collimate light rays emitted from the LED light source in a narrow angle direction with respect to the optical axis so that the light rays are collimated with respect to the optical axis, the second lens part is a second converging lens part disposed on an outside of the first lens part, the second converging lens part configured to collimate light rays emitted from the LED light source in a wide angle direction with respect to the optical axis so that the light rays are collimated with respect to the optical axis, the third lens part is disposed in front of the first lens part and the second lens part so that the light rays converged by and traveling through the first lens part and the light rays converged by and traveling through the second lens part are incident to the third lens part, the third lens part having a rectangular cross section taken along a plane perpendicular to the optical axis, wherein a height of the rectangular cross section is set to a dimension the same as a diameter of the first lens part and a width of the rectangular cross section is set larger than a diameter of the second lens part, and the third lens part further having a first total reflection surface, a second total reflection surface, a third total reflection surface, and a fourth total reflection surface, the rectangular cross section extending as a whole in one direction, the rectangular cross section including: a center region where the light rays that are converged by and travel through the first lens part pass through; two first regions disposed on both sides of the center region where some of the light rays from among the light rays that are converged by and travel through the second lens part pass through; and two second regions disposed outside of the two first regions, the first total reflection surface is disposed at an attitude wherein the first total reflection surface is inclined with respect to the optical axis so that the light rays, which travel toward the outside of one long side of the rectangular cross section and which are from among the light rays that are converged by and travel through the second lens part, are incident on the first total reflection surface and the incident light rays are reflected sideward, the second total reflection surface is disposed at an attitude wherein the second total reflection surface is inclined with respect to the optical axis so that the reflected light rays from the first total reflection surface are incident on the second total reflection surface, and the incident light rays are reflected by the second total reflection surface in a direction parallel to the optical axis to pass through one of the second regions, the third total reflection surface is disposed at an attitude wherein the third total reflection surface is inclined with respect to the optical axis so that the light rays, which travel toward the outside of an other long side of the rectangular cross section and which are from among the light rays that are converged by and travel through the second lens part, are incident to the third total reflection surface, and the fourth total reflection surface is disposed at an attitude wherein the fourth total reflection surface is inclined with respect to the optical axis so that the reflected light rays from the third total reflection surface are incident to the fourth total reflection surface, and the incident light rays are reflected in a direction parallel to the optical axis, and pass through an other of the second regions.