Patents by Inventor Hironori Hirama

Hironori Hirama 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 with coldcathode of graphite and its manufacture method
    Publication number: 20060012285
    Abstract: A cold cathode made of graphite is mounted at one end of a hollow tubular member. Concavities and convexities are formed on the surface of the cold cathode facing a center side of the tubular member. A fluorescent film is formed on the inner circumferential surface of the tubular member. An electron lead electrode for generating an electric field for pulling out electrons from the cold cathode is mounted on the tubular member. A fluorescent lamp is provided which uses the cold cathode capable of realizing good electron emission characteristics without an issue of tight adhesion between the cold cathode and a support substrate.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 19, 2006
    Applicant: Stanley Electric Co., Ltd.
    Inventors: Takahiro Matsumoto, Hironori Hirama
  • Cold emission electrode method of manufacturing the same and display device using the same
    Patent number: 6281626
    Abstract: An yttrium film is formed on the surface of a substrate made of an Ni—Cr-based material by deposition or sputtering using resistance heating or an electron beam. The yttrium film is heated in an inert gas atmosphere containing a very small amount of hydrogen to hydrogenate yttrium. The resultant yttrium hydride is excellent as a cold emission material for a cold emission electrode and can be used for a cold emission discharge fluorescent tube.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: August 28, 2001
    Assignees: Casio Computer Co., Ltd., Stanley Electric Co., Ltd.
    Inventors: Osamu Nakamura, Shigemi Suzuki, Yuichi Mori, Hironori Hirama