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:
Oct. 20, 2020
Filed:
Oct. 02, 2018
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Tsutomu Yoshikawa, Nara, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/16 (2006.01); G03B 21/20 (2006.01); G03B 33/12 (2006.01); G02B 26/00 (2006.01); G03B 21/00 (2006.01); G02B 7/00 (2006.01);
U.S. Cl.
CPC ...
G03B 21/16 (2013.01); G02B 26/008 (2013.01); G03B 21/204 (2013.01); G02B 7/008 (2013.01); G03B 21/008 (2013.01); G03B 33/12 (2013.01);
Abstract
A phosphor wheel includes a disk-shaped member that is rotated about a rotation axis, and a phosphor layer disposed on an outer face of the disk-shaped member. The disk-shaped member has a hollow-box structure that forms an enclosed space. A coolant is sealed in the enclosed space. The coolant evaporates to a gas state from a liquid state at more than or equal to a predetermined temperature. In the liquid state, a volume of the coolant is smaller than a capacity of the enclosed space. A light conversion device includes the phosphor wheel described above.