Patents by Inventor Jun-ichi Hirataka

Jun-ichi Hirataka 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 birefringent film between the substrates of the liquid crystal
    Patent number: 5179457
    Abstract: A liquid crystal display device includes a phase-plate disposed between a pair of substrates, preferably inside of the electrode, to increase the transmission rate and improve the contrast ratio of the display.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: January 12, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Jun-ichi Hirataka, Katsumi Kondo, Yasushi Tomioka, Shuji Imazeki, Yoshio Taniguchi