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:
Sep. 08, 2020
Filed:
Jan. 31, 2017
Sanken Electric Co., Ltd., Niiza-shi, Saitama, JP;
Tsutomu Yokota, Niiza, JP;
Takaya Ueno, Niiza, JP;
Masanori Hoshino, Niiza, JP;
Yoshinori Tanaka, Niiza, JP;
Hitoshi Murofushi, Niiza, JP;
Sanken Electric Co., Ltd., Niiza-shi, JP;
Abstract
A light emitting device includes: a substrate (); blue light emitting elements () arranged on the main surface of the substrate (); and a phosphor sheet () containing a phosphor that is excited by emission light from the blue light emitting elements and emits excitation light, the phosphor sheet () being disposed above the blue light emitting elements (), wherein the blue light emitting elements () includes first blue light emitting elements () which emit first emission light having a first wavelength taken as a peak wavelength of a light emission spectrum, and second blue light emitting elements () which emit second emission light having a second wavelength taken as a peak wavelength of a light emission spectrum, and the second wavelength being a longer wavelength than the first wavelength by a wavelength difference of at least 10 nm.