Patents by Inventor Lauens Doornheim

Lauens Doornheim 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).

  • Television receiver for selectively blocking video signal samples via stored blanking signals
    Patent number: 5119200
    Abstract: In a television receiver which comprises a video memory for noise reduction, large-area flicker reduction, still pictures and the like, an additional picture is generated by also storing its pixels in the video memory. The pixels of the additional picture are generated once by a pixel generator protected from being overwritten by the video signal applied at a field frequency of 50 hz by also storing a blanking bit for each pixel, preventing the pixel from being overwritten by the video signal. The additional picture may be, for example, a teletext page or an operating menu.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: June 2, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Petrus J. F. J. Van Den Hombergh, Herman J. R. Schmitz, Lauens Doornheim