Patents Examined by William L. Skies
  • Electrooptical liquid crystal device
    Patent number: 5825445
    Abstract: In an electooptical liquid crystal device comprising an OCB mode liquid crystal cell and an optically anisotropic element compensating a viewing angle characteristics of the cell, the optically anisotropic element satisfies the elliptical coefficient Z of the index ellipsoid of the optically anisotropic element,7.ltoreq.Z.ltoreq.10,if Z=(ndx-ndz)/(ndx-ndy),where ndx, ndy and ndz represent the components in x, y and z directions of the products of the refractive indice n of optically anisotropic element and the thickness of the optically anisotropic element, when the optically anisotropic element is combined with the bend-aligned liquid crystal cell as the electrooptical liquid crystal device.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: October 20, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masumi Okamoto, Masato Shoji, Yasuharu Tanaka, Masahito Ishikawa, Nobuko Fukuoka, Toshihiro Ninomiya, Tsuyoshi Ohyama, Norihiro Yoshida, Hitoshi Hatoh
  • Liquid crystal display device having compensating capacitive element for defective pixels
    Patent number: 5691786
    Abstract: A liquid crystal display device includes storage capacitive elements and compensating storage capacitive elements, both dedicated to pixel electrodes, respectively, and both having cut regions, respectively. When the storage capacitive elements are separated from the storage capacitive lines for repair, the compensating storage capacitive elements are separated from the pixel electrodes, thereby restraining a change in a voltage applied to the pixels and minimizing a change in display characteristics due to repair.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: November 25, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yutaka Nakai