Patents by Inventor Tadayoshi Oikawa

Tadayoshi Oikawa 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).

  • Plasma display device and driving method
    Patent number: 6115011
    Abstract: A plasma display device is capable of controlling the brightness of the entire image on a screen over a wide range without impairing a predetermined number of display gradations determined by the dynamic range of an A/D converter, an analogue input circuit and the like. For this purpose, the plasma display device is provided with means for changing the discharge condition (number of discharge pulses, discharge voltage, discharge voltage waveform and the like) during priming discharging, which is effected for initialization, in accordance with the brightness control to control the brightness of light emission during image display.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: September 5, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Yuji Sano, Tadayoshi Oikawa, Nobuo Azuma, Yuichiro Kimura, Masaji Ishigaki, Takashi Sasaki