Patents by Inventor Minoru Yabe

Minoru Yabe 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: 4510413
    Abstract: An electrode structure for an electron gun, especially an in-line type electrode structure for an electron gun of a color picture tube. The electrode structure dispenses with auxiliary electrodes and its three cylindrical members are integrally formed by press work. After the pressing step, the inner edge of the bottom portion of each cylindrical members is beveled to provide a tapering surface having a desired circular cross section. By forming a circular groove in the bottom portion, opposite to the tapering surface, the formation of the tapering surface is made more exact.
    Type: Grant
    Filed: February 9, 1980
    Date of Patent: April 9, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Yabe, Kenichi Noda, Satoru Endo, Masaaki Yamauchi
  • Patent number: 4498026
    Abstract: An electron gun for a color picture tube comprises opposing cup-shaped electrodes each having a plurality of openings laterally aligned in a row, the electrodes being combined such that the openings face each other to form electron lenses. The openings are formed in flat bottom walls of said electrodes, a width of a bridge portion between adjacent openings is 0.5 to 1.5 times a thickness of the bottom wall of each electrode, and corrective plate electrodes are arranged to oppose bridge portions with a predetermined distance therefrom. The electrodes are combined such that spherical aberration of said electron lenses as a whole can be reduced when one of the electrodes is applied with a voltage which is higher than that applied to the other.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: February 5, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Masaaki Yamauchi, Minoru Yabe, Shoji Shirai, Hidemasa Komoro, Kenichi Matsuda
  • Patent number: 4481003
    Abstract: A method for producing an electrode structure for use in an electron gun, especially an in-line type electrode structure for use an electron gun of a color picture tube. The electrode structure dispenses with auxiliary electrodes by forming its three cylindrical members integrally by press work. After the pressing step, the inner edge of the bottom portion of each of the cylindrical members is beveled to provide a tapering surface having a desired circular cross section. By forming a circular groove in the bottom portion, opposite to the tapering surface, the formation of the tapering surface is made more exact.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: November 6, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Yabe, Kenichi Noda, Satoru Endo, Masaaki Yamauchi
  • Patent number: 4381473
    Abstract: In an in-line type electron gun structure including three in-line type electron guns and a plurality of grid electrodes respectively aligned with the electron guns, each sleeve electrode has a length equal to at least 50% of an inner diameter thereof and the inner diameter is gradually increased toward a free end of the sleeve-shaped electrode from a point at about one half of the length thereof. This construction eliminates an auxiliary electrode, thus reducing the cost of manufacturing.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: April 26, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Endoh, Mamoru Ikeda, Minoru Yabe, Mitsuru Igarashi, Masaaki Yamauchi