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:
Jul. 14, 2009
Filed:
Sep. 13, 2005
Hajime Saito, Nara, JP;
Tatsuya Morioka, Ikoma, JP;
Shizuo Fujita, Kyoto, JP;
Yoichi Kawakami, Shiga, JP;
Mitsuru Funato, Kyoto-Shi, Kyoto, JP;
Masafumi Harada, Nara-shi, Nara, JP;
Kyoko Fujita, Legal Representative, Kyoto, JP;
Hajime Saito, Nara, JP;
Tatsuya Morioka, Ikoma, JP;
Shizuo Fujita, Kyoto, JP;
Yoichi Kawakami, Shiga, JP;
Mitsuru Funato, Kyoto-Shi, Kyoto, JP;
Masafumi Harada, Nara-shi, Nara, JP;
Kyoko Fujita, legal representative, Kyoto, JP;
Other;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A fluorescent material excellent in emission efficiency in white emission and a light-emitting apparatus employing this fluorescent material and having excellent color rendering are provided with a fluorescent material comprising a two-layer structure of a core of a particle size having a quantum effect and a shell covering this core in which the ground state energy of the core is in the range of 1.85 to 2.05 eV, the high order energy of the core is not in the ranges of 2.3 to 2.5 eV and 2.65 to 2.8 eV, or the ground state energy of the core is in the range of 2.3 to 2.5 eV, the high order energy of the core is not in the range of 2.65 to 2.8 eV an light-emitting apparatus employing these fluorescent materials.