Patents by Inventor Terrence C. Schmidt

Terrence C. Schmidt 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).

  • Automatic video convergence system
    Patent number: 5258830
    Abstract: An automatic convergence system for correcting misregistration of component color images in a projection video display unit. The system comprises control circuitry for generating target characters onto a projection surface, and a locator assembly for aiming a photosensor array at the displayed target images by means of a pair of stepper motors. The photosensor array detects the position of the target images and conveys this information to a microprocessor which in response calculates appropriate correction signals for application to vertical and horizontal convergence coils of the display system for effecting convergence of the component color images.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: November 2, 1993
    Assignee: Electrohome Limited
    Inventors: Terrence C. Schmidt, Alen Koebel
  • Ambient light rejecting quad photodiode sensor
    Patent number: 5117099
    Abstract: An ambient light rejecting quad photodiode sensor having compensation diodes connected with reverse polarity to respective quadrant photodiodes within the sensor, the compensation diodes being located outside of the area of illumination. By direct connection of compensation diodes in reverse polarity to each quadrant of the quad photodiodes, a large boost in signal to noise ratio is achieved for eliminating the effects of ambient room light as well as sensor dark current.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: May 26, 1992
    Inventor: Terrence C. Schmidt
  • Ambient light rejecting quad photodiode sensor
    Patent number: 4982081
    Abstract: An ambient light rejecting quad photodiode sensor having compensation diodes connected with reverse polarity to respective quadrant photodiodes within the sensor, the compensation diodes being located outside of the area of illumination. By direct connection of compensation diodes in reverse polarity to each quadrant of the quad photodiodes, a large boost in signal to noise ratio is achieved for eliminating the effects of ambient room light as well as sensor dark current.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: January 1, 1991
    Assignee: Electrohome Limited
    Inventor: Terrence C. Schmidt