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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.:

US 10365551 B1

PDFFull Text
Date of Patent:
Jul. 30, 2019

Filed:

Mar. 24, 2017

Wavelength conversion member including phosphor

Applicant:

Panasonic Corporation, Osaka, JP;

Inventors:

Yoshihisa Nagasaki, Osaka, JP;

Takashi Ohbayashi, Osaka, JP;

Kojiro Okuyama, Nara, JP;

Assignee:

PANASONIC CORPORATION, Osaka, JP;

Attorney:

McDermott Will & Emery LLP

Primary Examiner:

Jong-Suk (James) Lee

Assistant Examiner:

Christopher E Dunay

Int. Cl.
CPC ...
F21K 9/64 (2016.01); G03B 21/20 (2006.01); C09K 11/77 (2006.01); F21S 41/143 (2018.01); F21S 41/16 (2018.01); F21S 41/176 (2018.01); F21Y 115/30 (2016.01); F21S 41/20 (2018.01); F21Y 115/10 (2016.01); F21S 41/32 (2018.01); F21V 9/30 (2018.01);
U.S. Cl.
CPC ...
G03B 21/204 (2013.01); C09K 11/7734 (2013.01); C09K 11/7739 (2013.01); C09K 11/7774 (2013.01); F21S 41/143 (2018.01); F21S 41/16 (2018.01); F21S 41/176 (2018.01); F21K 9/64 (2016.08); F21S 41/285 (2018.01); F21S 41/321 (2018.01); F21V 9/30 (2018.02); F21Y 2115/10 (2016.08); F21Y 2115/30 (2016.08); G03B 21/2066 (2013.01);
Abstract

A wavelength conversion member comprises: a substrate; and a wavelength conversion layer. The wavelength conversion layer contains a first phosphor and a second phosphor. The second phosphor has a higher thermal conductivity than the first phosphor. In the wavelength conversion layer, a volume of the second phosphor is larger than a volume of the first phosphor. The wavelength conversion layer includes a first portion and a second portion. The first portion is located closer to the substrate than the second portion, and is in direct contact with the second portion. Thicknesses of the first portion and the second portion are equal to each other. A volume V11 of the first phosphor in the first portion, a volume V12 of the second phosphor in the first portion, a volume V21 of the first phosphor in the second portion, and a volume V22 of the second phosphor in the second portion satisfy V11/V12<V21/V22.

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