Patents by Inventor Toshihide Kawashima

Toshihide Kawashima 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).

  • Liquid crystal display device with interdigital electrodes
    Patent number: 3975085
    Abstract: AC drive voltages out of phase with each other are applied to a pair of interdigital electrodes disposed opposite to each other and adjacent to a liquid crystal material. By the AC drive voltages displaced in phase from each other rotating electric fields are generated to cause liquid crystal molecules to be violently rotated or perturbed. As a result, a contrast as well as rise and fall characteristics can be improved.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: August 17, 1976
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventors: Tatsuya Yamada, Toshihide Kawashima, Takashi Oozeki