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:
Jun. 30, 2020
Filed:
Mar. 13, 2019
Applicant:
Nichia Corporation, Anan-shi, Tokushima, JP;
Inventors:
Assignee:
NICHIA CORPORATION, Anan-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 33/50 (2010.01); A01G 7/04 (2006.01); H01L 25/075 (2006.01);
U.S. Cl.
CPC ...
H01L 33/502 (2013.01); A01G 7/045 (2013.01); H01L 25/0753 (2013.01);
Abstract
A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm or more and 490 nm or less, and a red fluorescent material which is excited by the light from the light emitting element to emit light having at least one light emission peak wavelength in a range of 580 nm or more and 680 nm or less, wherein a ratio of the photon flux R of red light in a range of 620 nm or more and 700 nm or less to the photon flux B of blue light in a range of 400 nm or more and 490 nm or less, R/B, is in a range of more than 20 and 200 or less.