Patents by Inventor Kazushi Nonaka

Kazushi Nonaka 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).

  • Transmission type liquid crystal display device
    Patent number: 5048932
    Abstract: The display device includes two transparent substrates which enclose therebetween a liquid crystal having dichroic dye dissolved therein. A back light source assembly is disposed behind the transparent substrates. A dummy voltage is applied across the liquid crystal even in the non-operating mode in which the back light source assembly is turned off to present no display. Because non-uniform color density and non-uniform luminance distribution are eliminated on the display screen the display device can ensure a high display quality and maintain high reliability over a long period of use.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: September 17, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuko Yamamoto, Hideki Matsukawa, Hiroshi Esaki, Kazushi Nonaka