Patents by Inventor Takashi Oouchida

Takashi Oouchida 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).

  • Publication number: 20070052342
    Abstract: A light-emitting device includes a light-emitting element emitting primary light and a wavelength conversion portion absorbing a part of the primary light and emitting secondary light having a wavelength equal to or longer than the wavelength of the primary light. The wavelength conversion portion includes a plurality of green or yellow light-emitting phosphors and a plurality of red light-emitting phosphors. The green or yellow light-emitting phosphor is implemented by at least one selected from a specific europium (II)-activated silicate phosphor (A-1) and a specific cerium (III)-activated silicate phosphor (A-2). The red light-emitting phosphor is implemented by a specific europium (II)-activated nitride phosphor (B). The light-emitting device emitting white light at efficiency and color rendering property higher than in a conventional example can thus be provided.
    Type: Application
    Filed: August 31, 2006
    Publication date: March 8, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masatsugu Masuda, Masaaki Katoh, Kazuhiko Inoguchi, Hiroshi Umeda, Yuhichi Memida, Takashi Oouchida, Yuhsuke Fujita, Masatoshi Omoto
  • Publication number: 20060255712
    Abstract: A light emitting apparatus includes: a semiconductor light emitting element capable of emitting light of two wavelength components; and a fluorescent material section, having a fluorescent material contained therein, capable of emitting light, the light being radiated as a result of fluorescence from the fluorescent material when the fluorescent material is excited by the two wavelength components, wherein the two wavelength components and the wavelength component resulting from the fluorescence are adjusted so as to be set at an arbitrary color temperature on a characteristic curve of black-body radiation.
    Type: Application
    Filed: April 19, 2006
    Publication date: November 16, 2006
    Inventors: Masatsugu Masuda, Hiroshi Umeda, Masaharu Kitano, Takashi Oouchida