Patents by Inventor Toshio Tohkura

Toshio Tohkura 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: 4633139
    Abstract: A plasma display panel with quick firing nature and high speed scanning having a plurality of display cells defined by parallel cathode electrodes and parallel anode electrodes perpendicular to said cathode electrodes. The cells along a cathode electrode discharge simultaneously either strongly or weakly according to the currents in the anode electrodes, and said current in the anode electrodes is switched according to the picture pattern to be displayed. A strongly discharged cell provides a bright large discharge which is visible through a cathode electrode, and a weakly discharged cell provides a dark small discharge which is blinded by a cathode electrode itself and is invisible, but merely functions as a seed cell for firing adjacent cells. As all the cells function both as display cells and seed cells, quick firing of cells or high speed scanning of light spots along the anode electrodes is accomplished although no specific seed electrode for mere seed discharge is provided.
    Type: Grant
    Filed: October 30, 1984
    Date of Patent: December 30, 1986
    Assignee: OKI Electric Industry Co., Ltd.
    Inventors: Joichi Endo, Takashi Komatsu, Toshio Tohkura