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:
Dec. 20, 2011
Filed:
Jul. 23, 2008
Takahiro Sato, Kawasaki, JP;
Hiroki Iwanaga, Yokohama, JP;
Akio Amano, Kawasaki, JP;
Shinji Murai, Sagamihara, JP;
Takahiro Sato, Kawasaki, JP;
Hiroki Iwanaga, Yokohama, JP;
Akio Amano, Kawasaki, JP;
Shinji Murai, Sagamihara, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The present invention provides a fluorescent substance excellent in emission intensity and in emission efficiency. The substance can be excited by light at a longer wavelength than ever. The present invention also provides a luminous composition comprising the fluorescent substance and a light-emitting element using the substance. The fluorescent substance comprises a rare earth metal and a phosphine oxide ligand which coordinates to said rare earth metal and said ligand containing at least one siloxane bond in its structure. The fluorescent substance can be produced from a reaction between a compound having a siloxane bond and a rare earth complex coordinated by a phosphine oxide ligand. The luminous composition comprises the fluorescent substance.