Patents by Inventor Pierre Aigrain

Pierre Aigrain 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).

  • Anti-dazzle system for vehicles
    Patent number: 5486938
    Abstract: In front of the driver there is arranged a screen (20) with a variable transmission coefficient. The headlamps (10, 11) of the vehicle send out periodic pulses of short duration with respect to the period. The transmission coefficient of the screen (20, 23, 24) varies in such a way that it is transparent during the duration of the light pulses and that the screen is substantially less transparent between these pulses.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: January 23, 1996
    Assignee: Thomson-CSF
    Inventor: Pierre Aigrain
  • Electrooptical display screen and a method of fabrication of said screen
    Patent number: 4944575
    Abstract: In a method of construction of an electrooptical display screen and especially a liquid-crystal screen, a control point of an image element is provided with a coupling element of ferroelectric material between an electrode and a control lead.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: July 31, 1990
    Assignee: Thomson-CSF
    Inventors: Pierre Aigrain, Bruno Mourey, Jean C. Dubois, Michel Hareng, Philippe Robin
  • Method for protecting against drop-outs in a sound signal recorded on a video-disc
    Patent number: 4085426
    Abstract: The present invention relates to methods for protecting against drop-outs in a sound signal recorded on a video-disc. It consists in recording onto a video-disc the same sound signal through the sub-carriers with a constant delay from one to the other. On reading out this video-disc, the two sub-carriers are restored to synchronism and the sub-carrier not altered is chosen for playing the sound signal.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: April 18, 1978
    Assignee: Thomson-Brandt
    Inventors: Pierre Aigrain, Georges Broussaud, Jean Paul Peltier, Erich Spitz