US 9,810,392 B2
Vehicle headlight device
Masashige Suwa, Tokyo (JP); Ritsuya Oshima, Tokyo (JP); Muneharu Kuwata, Tokyo (JP); Atsushi Michimori, Tokyo (JP); and Kuniko Kojima, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 14/434,469
Filed by MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
PCT Filed Oct. 10, 2013, PCT No. PCT/JP2013/006045
§ 371(c)(1), (2) Date Apr. 9, 2015,
PCT Pub. No. WO2014/057681, PCT Pub. Date Apr. 17, 2014.
Claims priority of application No. 2012-226230 (JP), filed on Oct. 11, 2012.
Prior Publication US 2015/0267888 A1, Sep. 24, 2015
Int. Cl. F21V 17/02 (2006.01); F21S 8/10 (2006.01); B62J 6/02 (2006.01)
CPC F21S 48/1721 (2013.01) [B62J 6/02 (2013.01); F21S 48/1163 (2013.01); F21S 48/125 (2013.01); F21S 48/1258 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vehicle headlight device used for a vehicle, comprising
a first lamp that includes:
a first light source that emits a ray;
an optical system that has a first wedge prism and a second wedge prism for receiving, deflecting, and projecting the ray from the first light source;
a rolling mechanism that rotates the first wedge prism about a rotation axis; and
a control circuit that controls the rolling mechanism so as to rotate the first wedge prism, wherein
the first wedge prism has a first refractive surface perpendicular to the rotation axis and a second refractive surface tilted with respect to the first refractive surface, the first wedge prism having an end at which a distance between the first refractive surface and the second refractive surface is smallest;
the second wedge prism has a third refractive surface perpendicular to the rotation axis and a fourth refractive surface tilted with respect to the third refractive surface;
an optical axis of the first light source passes through the first refractive surface and the second refractive surface of the first wedge prism;
the first refractive surface and the second refractive surface of the first wedge prism are flat surfaces;
the first refractive surface and the third refractive surface are disposed so as to face each other; and
the control circuit controls the rolling mechanism so that the end of the first wedge prism is located on an opposite side of a road surface with respect to the optical axis of the first light source.