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:
Aug. 25, 2015
Filed:
Mar. 23, 2012
Yutaka Nakai, Yokohama, JP;
Tsuyoshi Hioki, Yokohama, JP;
Yutaka Nakai, Yokohama, JP;
Tsuyoshi Hioki, Yokohama, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
A light-emitting element includes: a light source; a light guide member having a columnar shape and comprising a plurality of side surfaces containing a pair of parallel total reflection principal surfaces and other surfaces than the total reflection principal surfaces, an upper bottom surface disposed so that light from the light source reaches the total reflection principal surfaces, and a lower bottom surface disposed opposite to the upper bottom surface; clad portions provided on the other side surfaces of the light guide member than the total reflection principal surfaces, the clad portions having a smaller refractive index than that of the light guide member; and a light extraction portion provided on one part of the total reflection principal surfaces.