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:
Mar. 18, 2025
Filed:
Jun. 18, 2020
Denka Company Limited, Tokyo, JP;
Hiroaki Toyoshima, Tokyo, JP;
Mitsuru Kawagoe, Tokyo, JP;
DENKA COMPANY LIMITED, Tokyo, JP;
Abstract
A phosphor in which at least some of an element M in a phosphor host crystal represented by M(L, A)Xis substituted with Eu as an activation material. M represents one or more (including at least Sr) of Mg, Ca, Sr, Ba, and Zn, L represents one or more of Li, Na, and K, A represents one or more of Al, Ga, B, In, Sc, Y, La, and Si, X represents one or more (except that X represents only N) of O, N, F, and Cl, α, β, γ, and δ satisfy 8.70≤α+β+γ+δ≤9.30, 0.00<α≤1.30, 3.70≤β≤4.30, 3.70≤γ≤4.30, and 0.00<δ≤1.30. In a fluorescence spectrum obtained by irradiation with light having a wavelength of 260 nm, when a fluorescence intensity at a wavelength of 569 nm is represented by Iand a fluorescence intensity at a wavelength of 617 nm is represented by I, I/Iis 0.01 or more and 0.4 or less.