Patents by Inventor Eiichiro Nakazawa

Eiichiro Nakazawa 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).

  • Thin-film cold cathode structure and device using the same
    Patent number: 5280221
    Abstract: A cold cathode device includes a first electrode formed on a substrate, an insulating film formed on the first electrode, a thin film formed on the insulating film and for generating hot electrons, a second electrode formed on the thin film. Electrons are injected from the second electrode at a first half cycle of each cycle of an a.c. voltage. The injected electrons form a space charge layer between the insulating film and the thin film. At a second half cycle of each cycle, the hot electrons are generated from the electrons stored in the space charge layer inside of the thin film, and emitted from the second electrode.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: January 18, 1994
    Assignee: Nippon Hoso Kyokai
    Inventors: Shinji Okamoto, Eiichiro Nakazawa