Patents by Inventor Koji Takahasi

Koji Takahasi 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 lamp lighting apparatus and lighting control system
    Patent number: 7388337
    Abstract: A fluorescent lamp lighting apparatus according to the present invention comprises an initial illuminance correction control circuit which sets a fluorescent lamp to an initial illuminance correction control lighting mode, a switching portion which changes the fluorescent lamp from the initial illuminance correction control lighting mode to an external control dimming mode when a predetermined external dimming signal is detected, and a control portion which gradually dimming so as to achieve a dimming level of a switched mode when switching the initial illuminance correction control lighting mode and the external control dimming mode, and control so as to achieve a dimming level corresponding to a cumulative lighting time of the fluorescent lamp when the changed mode is the initial illuminance correction control lighting mode.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: June 17, 2008
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Koji Takahasi, Toshiyuki Hiraoka, Noriyuki Kitamura, Naoko Iwai, Kazuyuki Uratani, Shinji Nogi, Toru Ishikita, Isao Yamazaki