Patents by Inventor Akifumi Ochiai

Akifumi Ochiai 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).

  • Light-emitting device, vehicular lighting fixture comprising the device, and head lamp
    Patent number: 8274208
    Abstract: A light-emitting device comprising a light source which emits excitation light and a fluorescent substance which absorbs the excitation light to emit light in combination, wherein a fluorescent substance comprising an ? type SiAlON represented by the general formula: (Ca?,Eu?)(Si,Al)12(O,N)16 (1.5<?+?<2.2, 0<?<0.2, O/N?0.04) as a main component and having a specific surface area of 0.1 to 0.35 m2/g is used as the fluorescent substance. This light-emitting device shows little color change due to temperature change and efficiently emits light, even when it is used in a high temperature environment, and it is especially suitable for lighting apparatuses for vehicles such as headlamps.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: September 25, 2012
    Assignees: Stanley Electric Co., Ltd., Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yasuyuki Miyake, Shuichi Taya, Akifumi Ochiai, Hideyuki Emoto, Masahiro Ibukiyama
  • LIGHT-EMITTING DEVICE, VEHICULAR LIGHTING FIXTURE COMPRISING THE DEVICE, AND HEAD LAMP
    Publication number: 20100208481
    Abstract: A light-emitting device comprising a light source which emits excitation light and a fluorescent substance which absorbs the excitation light to emit light in combination, wherein a fluorescent substance comprising an ? type SiAlON represented by the general formula: (Ca?,Eu?)(Si,Al)12(O,N)16 (1.5<?+?<2.2, 0<?<0.2, O/N?0.04) as a main component and having a specific surface area of 0.1 to 0.35 m2/g is used as the fluorescent substance. This light-emitting device shows little color change due to temperature change and efficiently emits light, even when it is used in a high temperature environment, and it is especially suitable for lighting apparatuses for vehicles such as headlamps.
    Type: Application
    Filed: October 15, 2008
    Publication date: August 19, 2010
    Inventors: Yasuyuki Miyake, Shuichi Taya, Akifumi Ochiai, Hideyuki Emoto, Masahiro Ibukiyama