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:
Apr. 03, 2012
Filed:
Aug. 08, 2008
Applicants:
Naoto Hirosaki, Tsukuba, JP;
Ken Sakuma, Tsukuba, JP;
Kyota Ueda, Tsukuba, JP;
Hajime Yamamoto, Tsukuba, JP;
Inventors:
Naoto Hirosaki, Tsukuba, JP;
Ken Sakuma, Tsukuba, JP;
Kyota Ueda, Tsukuba, JP;
Hajime Yamamoto, Tsukuba, JP;
Assignee:
National Institute for Materials Science, Tsukuba-shi, Ibaraki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
A bullet type light emitting diode lamp or a chip-type light emitting diode lamp includes a semiconductor light emitting element, and a plurality of fluorescent materials that absorb part or whole of light emitted from the semiconductor light emitting element, and emit fluorescence at a wavelength different from that of the absorbed light. The fluorescent materials include a phosphor of a CaAlSiNcrystalline phase.