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:
Feb. 13, 2018
Filed:
Dec. 16, 2016
Nichia Corporation, Anan-shi, Tokushima, JP;
Hirofumi Ichikawa, Tokushima, JP;
Tomoki Tanisada, Anan, JP;
Yasunori Shimizu, Tokushima, JP;
Masafumi Kuramoto, Tokushima, JP;
NICHIA CORPORATION, Anan-Shi, JP;
Abstract
A light emitting device includes at least one light emitting element including a plurality of semiconductor layers; and a light transmissive sealing member covering the at least one light emitting element. The light transmissive sealing member comprises a light transmissive sealing resin containing a silicone resin having a siloxane bond scaffold having methyl and phenyl groups as a principal ingredient. The light transmissive sealing resin has a refractive index in a range between 1.45 and 1.52, a durometer type D hardness at 25° C. specified by JIS K 6253 in a range between 20 and 70, and a DMA tan δ-based glass transition temperature (Tg) in a range between 20° C. and 70° C.