Patents by Inventor Johannes J. Bos

Johannes J. Bos 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 having an automatic radiofrequency resonant circuit adjustment circuit
    Patent number: 4843636
    Abstract: In a television receiver having an automatic adjustment circuit for a radio frequency resonant circuit (3) of the receiver, using two carriers fed to the read frequency input of the receiver, the product of the amplitudes of the two carriers is formed by means of a detection circuit (37) coupled to an output (5) of the radio frequency circuit (3) and the adjustment setting of the resonant circuit is effected to a maximum value of this product (at 77), thus providing a simple, correct adjustment.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: June 27, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Johannes H. Hendriks, Johannes H. A. Brekelmans, Johannes J. Bos
  • Picture display device
    Patent number: 4356436
    Abstract: A picture display device in which velocity modulation of the electron beam is effected with a deflection correction signal derived from the video signal to be displayed. The brightness distribution influenced by this deflection correction signal in a sudden brightness transient is corrected by adding to the video signal a brightness correction signal which is predominantly proportional to the product of the video signal and a first derivative with respect to time of the deflection correction signal.
    Type: Grant
    Filed: September 10, 1980
    Date of Patent: October 26, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Piet G. J. Barten, Johannes J. Bos