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:
Apr. 28, 2020
Filed:
Jul. 08, 2019
Toyoda Gosei Co., Ltd., Kiyosu-shi, JP;
Hirotaka Fukui, Kiyosu, JP;
Yoshiharu Tanaka, Kiyosu, JP;
TOYODA GOSEI CO., LTD., Kiyosu-Shi, Aichi-Ken, JP;
Abstract
A light emitting device includes a light emitting element, a light guide, which includes a light guiding region and a lens region, which are continuous between both ends of the light guide, with the light guiding region to propagate therein light emitted from the light emitting element, with the lens region including a light extracting surface on an opposite side thereof to the light guiding region to extract the light propagated inside the light guiding region to outside, a first cover, which covers a surface of the light guiding region with an air layer therebetween, and a second cover, which covers the first cover while adhering tightly to a side surface of the lens region in such a manner as to hermetically seal the air layer.