The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2017
Filed:
Dec. 20, 2013
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Hiroshi Ohno, Yokohama, JP;
Yuichiro Yamamoto, Yokohama, JP;
Mitsuaki Kato, Kawasaki, JP;
Katsumi Hisano, Matsudo, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
According to one embodiment, a lighting apparatus includes a light source which includes a light emitting surface, and a light guide provided to be coaxial with an axis which extends along a direction perpendicular to the light emitting surface. The light guide includes: an incident plane facing the light emitting surface; an outer circumferential surface configured to protrude in a direction extending away from the light source so as to surround the axis from an outer periphery of the incident surface and so as to totally reflect light from the light source which is made to enter the light guide from the incident surface; and a hollow part provided at a position distant in the axis direction from the incident surface. The hollow part includes a first light diffusing surface parallel to an axis along which the light totally reflected on the outer circumferential surface is led.