Patents by Inventor Hazama Yasue

Hazama Yasue 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).

  • Contrast corrector for video signal
    Patent number: 5255080
    Abstract: For a video apparatus such as a television receiver, a gray level correcting device is provided to correct luminance and color saturation of a video signal, thereby making the reproduced image clear and vivid. In this device, at least one of the difference between the black level of the luminance signal and a predetermined pedestal voltage and the difference between the white level and a certain white level control voltage is calculated, and the color saturation of a chrominance signal is controlled by the color saturation control voltage added with the calculated difference.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: October 19, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Atsushisa Kageyama, Hazama Yasue