Patents by Inventor Masayuki Nagaoka

Masayuki Nagaoka 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).

  • Gradation conversion system for converting color display data into gradation display data
    Patent number: 5229762
    Abstract: A gradation conversion system comprising: a plurality of gradation conversion devices for converting color display data into gradation display data by different gradation conversion methods, respectively; and switching device for selectively activating one of the plurality of graduation conversion device. Accordingly, if a number of different colors are to be displayed in the same number of gradations when converting multi-color display data into gradation display data, it is possible to perform this gradation conversion. On the other hand, if different colors are to be displayed in gradations as exact to the brightnesses of colors as possible, it is possible to select one of plural gradation conversion methods so as to carry out this gradation conversion.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: July 20, 1993
    Assignees: Hitachi, Ltd., Hitachi Video and Information System, Inc.
    Inventors: Hiromichi Itoh, Yoshihiro Hayashi, Masami Yamagishi, Masayuki Nagaoka, Shigenobu Ishimoto, Susumu Onodera