Patents by Inventor Kyoko Fujita, legal representative

Kyoko Fujita, legal representative has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fluorescent material having two layer structure and light emitting apparatus employing the same
    Patent number: 7560859
    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.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: July 14, 2009
    Assignees: Sharp Kabushiki Kaisha
    Inventors: Hajime Saito, Tatsuya Morioka, Shizuo Fujita, Yoichi Kawakami, Mitsuru Funato, Masafumi Harada, Kyoko Fujita, legal representative, Shigeo Fujita