Patents by Inventor Adriaan J. Hoeven

Adriaan J. Hoeven 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).

  • CRT display device comprising a filter in the cathode modulator
    Patent number: 5712538
    Abstract: A phosphor screen in a display device is scanned by separate electron beams in order to generate images of different frequency content in one color in substantially the same part of the phosphor screen. The different images can be perceived as a composite image for some time. The individual electron beams can be modulated by means of a cathode modulator on the basis of a high frequency and a low frequency component of an electronic image signal or on the basis of an image component and a text component of an electronic image signal. The modulations of the individual electron beams may be slightly delayed relative to one another in order to avoid overloading of the phosphor material.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: January 27, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Petrus N. J. Vis, Rudolf Kemner, Edwin A. Montie, Alfred Ketting, Adriaan J. Hoeven