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:
May. 19, 2026
Filed:
Mar. 14, 2023
Applicant:
Sanken Electric Co., Ltd., Niiza, JP;
Inventor:
Yousuke Umetsu, Niiza, JP;
Assignee:
SANKEN ELECTRIC CO., LTD., Niiza, JP;
Primary Examiner:
Int. Cl.
CPC ...
H10H 20/851 (2025.01);
U.S. Cl.
CPC ...
H10H 20/8513 (2025.01);
Abstract
A light emitting device according to one or more embodiment is disclosed, which may include a blue LED, a first phosphor that is excited by light of the blue LED and emits green to yellow light, and a second phosphor that is excited by light of the blue LED and emits light with an emission peak wavelength greater than the emission peak wavelength of the first phosphor but 625 nm or less. In one or more embodiments, an emission intensity of the light emitting device at an emission wavelength of 650 nm relative to the emission intensity at the emission peak wavelength of the light emitting device may be 60% or less.