Patents by Inventor Fujio Shirai

Fujio Shirai 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).

  • R,G,B level control in a liquid crystal TV using average of composite video signal
    Patent number: 4745461
    Abstract: A circuit is disclosed which, in order to perform a faithful color reproduction, controls the level of a color video signal on a liquid crystal television receiver by uniformly amplifying primary color signals R, G and B in accordance with an average of composite color video signal and, after passing through a clamping circuit to obtain an aligned pedestal level, subjecting them to A/D conversion.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: May 17, 1988
    Assignee: Casio Computer Co., Ltd.
    Inventors: Fujio Shirai, Takahiro Fuse