Patents by Inventor Kazuhiro Takahara

Kazuhiro Takahara 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).

  • Method and circuit for selectively driving capacitive display cells in a matrix type display
    Patent number: 4456909
    Abstract: A method for driving a thin film EL display device comprising the steps of clamping the Y side scanning electrodes selectively and sequentially to a reference voltage and applying the display voltage selectively from the X side data electrodes. In addition, the non-display voltage which is lower than the display threshold voltage, is applied to the non-selected data electrodes and the non-selected scanning electrodes are floated. This new driving method reduces drive power and widens the device operating voltage range.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: June 26, 1984
    Assignee: Fujitsu Limited
    Inventors: Kazuhiro Takahara, Keizo Kurahashi, Hisashi Yamaguchi