Patents by Inventor Syoichi Wakita

Syoichi Wakita 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).

  • Cathode ray tube
    Publication number: 20040232816
    Abstract: The present invention provides a cathode ray tube which exhibits a favorable contrast by enhancing a speed modulation effect. A front-stage anode electrode and a focus electrode which constitute an electron gun are respectively divided into a plurality of portions. A plurality of portions of the divided front-stage anode electrode are arranged in the tube axis direction at given intervals and are electrically connected with each other. A plurality of portions of the divided focus electrode are arranged in the tube axis direction at given intervals and are electrically connected with each other. Due to gaps formed in the front-stage anode electrode and the focus electrode, the speed modulation effect is increased.
    Type: Application
    Filed: June 3, 2004
    Publication date: November 25, 2004
    Inventors: Syoichi Wakita, Nobuyuki Suzuki, Toshio Nakayama, Yasuo Tanaka, Kouichi Harasaka
  • Cathode ray tube
    Patent number: 6815913
    Abstract: The present invention provides a cathode ray tube which exhibits a favorable contrast by enhancing a speed modulation effect. A front-stage anode electrode and a focus electrode which constitute an electron gun are respectively divided into a plurality of portions. A plurality of portions of the divided front-stage anode electrode are arranged in the tube axis direction at given intervals and are electrically connected with each other. A plurality of portions of the divided focus electrode are arranged in the tube axis direction at given intervals and are electrically connected with each other. Due to gaps formed in the front-stage anode electrode and the focus electrode, the speed modulation effect is increased.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: November 9, 2004
    Assignees: Hitachi, Ltd., Hitachi Electronic Devices Co., Ltd.
    Inventors: Syoichi Wakita, Nobuyuki Suzuki, Toshio Nakayama, Yasuo Tanaka, Kouichi Harasaka
  • Cathode ray tube
    Publication number: 20030025437
    Abstract: The present invention provides a cathode ray tube which exhibits a favorable contrast by enhancing a speed modulation effect. A front-stage anode electrode and a focus electrode which constitute an electron gun are respectively divided into a plurality of portions. A plurality of portions of the divided front-stage anode electrode are arranged in the tube axis direction at given intervals and are electrically connected with each other. A plurality of portions of the divided focus electrode are arranged in the tube axis direction at given intervals and are electrically connected with each other. Due to gaps formed in the front-stage anode electrode and the focus electrode, the speed modulation effect is increased.
    Type: Application
    Filed: July 12, 2002
    Publication date: February 6, 2003
    Inventors: Syoichi Wakita, Nobuyuki Suzuki, Toshio Nakayama, Yasuo Tanaka, Kouichi Hirasaka