Patents by Inventor Susmu Kondo

Susmu Kondo 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: 4995704
    Abstract: The present invention discloses a liquid crystal display device including a liquid crystal cell, the liquid crystal cell including two substrates which are arranged substantially parallel to each other and have electrodes on opposing surfaces thereof, and a liquid crystal composition held between the substrates such that the liquid crystal molecules are arranged in a twisted mode, first and second polarizers arranged at both sides of the liquid crystal cell, and first and second optical delay plates arranged between the liquid crystal cell and the second polarizer, wherein assuming that a retardation value of the liquid crystal cell is given by:R.sub.0 =.DELTA.n.multidot.d.multidot.cos.sup.2 .theta.where .DELTA.n is the optical anisotropy of the liquid crystal composition, d is the distance between the two substrates in the liquid crystal cell, and .theta. is the tilt angle of the liquid crystal composition, a total of the retardation values of the first and second optical delay plates is R.sub.0 .times.0.
    Type: Grant
    Filed: July 7, 1989
    Date of Patent: February 26, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomiaki Yamamoto, Akio Murayama, Susmu Kondo, Hitoshi Hato, Shinichi Kamagami, Shoichi Matsumoto