Patents by Inventor Hiroshi Doihara

Hiroshi Doihara 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).

  • Apparatus for controlling display and method for gradation conversion
    Patent number: 6486863
    Abstract: Brightness of input data ranging from 0 to 20% (brightness close to black) is converted to gradation Y0 (black) and brightness ranging from 80 to 100% (brightness close to white) is converted to gradation Y7 (white). Ranges of brightness from 20 to 35%, 35 to 45%, 45 to 50%, 50 to 55%, 55 to 65%, and 65 to 80% are converted to gradations Y1 to Y6, respectively. While brightness of the input data is converted to eight gradations which an LCD can display, intervals of brightness assigned to each of gradations are so specified that they are narrower around medium brightness (around 50%) than around the minimum (0%) or maximum (100%) brightness, i.e., the conversion is performed in a nonlinear manner.
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: November 26, 2002
    Assignee: Sony Corporation
    Inventors: Hiroshi Doihara, Hirotaka Sakaguchi, Hajime Terada