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. 26, 2018
Filed:
Dec. 20, 2016
Nichia Corporation, Anan-shi, Tokushima, JP;
Kenji Asai, Naruto, JP;
NICHIA CORPORATION, Anan-shi, JP;
Abstract
A light emitting device comprises a light emitting element having an emission peak wavelength in a wavelength range of 430 nm to 470 nm, and a phosphor material comprising at least one type of phosphor selected from the group consisting of a first phosphor and a second phosphor, a third phosphor, a fourth phosphor, and a fifth phosphor having respective compositions represented by formulas (I)-(V):()MgO.(/2)ScOMgFCaF.(1−)GeO.(/2)MOMn  (I)A[MFMn  (II)LuAlO:Ce  (III)(Sr,Ca)AlSiN:Eu  (IV)(Ca,Sr,Ba)MgSiO(F,Cl,Br):Eu  (V)In the formulas (I)-(V), Mis at least one of Al, Ga, and In; x, y, z, s, t, and u each satisfy 2≤x≤4, 0<y<1.5, 0<z<0.05, 0≤s≤0.5, 0<t<0.5, and 0≤u<1.5; A is at least one of K, Li, Na, Rb, Cs, and NH; M is at least one type of element from group 4 elements and group 14 elements; and p satisfies 0<p<0.2.