Patents by Inventor Olivier Berthaut

Olivier Berthaut 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).

  • Method for the automatic measurement of convergence and for the determination of corrections to be made in trichromatic cathode tube deflectors and machine for the application of this method
    Patent number: 4925420
    Abstract: For the automatic determining of the characteristics of the corrections to be made in trichromatic cathode tube deflectors, measurements are made of the coordinates of the midpoints of the bars R and B of a crossed bar test pattern at "strategic" places. With the deflector in the "mean" position on the tube, the values obtained are standardized by computation to re-establish virtually the ideal position of the deflector, the convergence errors due to this deflector are computed and the pinpoint or overall corrections to be made to it are deduced therefrom.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: May 15, 1990
    Assignee: Videocolor
    Inventors: Jean-Pierre Fourche, Guy Legrand, Michel Faivre, Olivier Berthaut