Patents by Inventor Kazuo Iwasawa

Kazuo Iwasawa 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).

  • Patent number: 6356030
    Abstract: A flourescent luminous type display device capable of providing display at increased luminance while being simplified in structure. An insulating substrate constituting a vacuum airtight envelope is laminatedly formed on an inner surface thereof with cathode electrodes and emitters in order. Another insulating substrate is laminatedly formed on an inner surface thereof with an anode electrode and phosphor layers. The phosphor layers contain a secondary electron emission material. When a switch is closed, electron emitted from the emitters are permitted to be impinged on the phosphor layers, leading to luminescence thereof. The anode electrode merely has a pulse-like drive signal applied thereto through a capacitor, however, secondary electrons emitted from the phosphor layers permit the luminescence to be maintained even after stop of the drive signal.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: March 12, 2002
    Assignee: Futaba Denshi Kogyo Kabushiki Kaisha
    Inventors: Shigeo Itoh, Kazuo Iwasawa, Tatsuo Yamaura, Takao Kishino
  • Publication number: 20010050537
    Abstract: A flourescent luminous type display device capable of providing display at increased luminance while being simplified in structure. An insulating substrate constituting a vacuum airtight envelope is laminatedly formed on an inner surface thereof with cathode electrodes and emitters in order. Another insulating substrate is laminatedly formed on an inner surface thereof with an anode electrode and phosphor layers. The phosphor layers contain a secondary electron emission material. When a switch is closed, electron emitted from the emitters are permitted to be impinged on the phosphor layers, leading to luminescence thereof. The anode electrode merely has a pulse-like drive signal applied thereto through a capacitor, however, secondary electrons emitted from the phosphor layers permit the luminescence to be maintained even after stop of the drive signal.
    Type: Application
    Filed: December 22, 2000
    Publication date: December 13, 2001
    Applicant: Futaba Denshi Kogyo Kabushiki Kaisha
    Inventors: Shigeo Itoh, Kazuo Iwasawa, Tatsuo Yamaura, Takao Kishino