Patents by Inventor Tutomu Asida

Tutomu Asida 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).

  • Method of manufacturing liquid crystal display devices
    Patent number: 4070749
    Abstract: A pair of insulating substrates are maintained at a definite spacing, at least one of the substrates being transparent and provided with transparent electrode, the periphery of the substrates is sealed except a liquid crystal inlet opening to form a cell, a liquid crystal is filled into the cell and the opening is sealed with a molten solder in an inert atmosphere.
    Type: Grant
    Filed: June 30, 1976
    Date of Patent: January 31, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Masayoshi Misono, Masaharu Koyama, Tutomu Asida
  • Liquid crystal display device and method of manufacturing the same
    Patent number: 4056306
    Abstract: The liquid crystal display device comprises a pair of spaced parallel insulating substrates, at least one of which being transparent, opposing electrodes formed on the inner surfaces of the substrates, a peripheral sealing member for sealing the peripheries of the substrates and provided with a filling port for filling a liquid crystal into a space between the substrates, a metal layer formed across the full width of the side surfaces of the substrates sandwiching the sealing member surrounding the filling port, and a solder layer formed on the metal layer to seal the filling port. The solder layer has an amount of 0.1 to 1.2mg/mm.sup.2, and is formed by applying a molten solder ball having a predetermined weight.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: November 1, 1977
    Assignee: Hitachi, Ltd.
    Inventors: Masayoshi Misono, Masaharu Koayama, Tutomu Asida