Patents by Inventor Brian L. Welch

Brian L. Welch 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).

  • Suppressing image breakup in helmut mounted displays which use temporally separated bit planes to achieve grey scale
    Patent number: 5764202
    Abstract: For displaying moving images on a head mounted, temporal modulation display device from a video source, without image break-up appearing in the observed image, an image shift device is provided for shifting each temporally separated component image within each display cycle of grey scale component images representing each frame of the video source. The display device is for use with head mounted displays in which an LCD or other FPD using temporal modulation is used to display video images without image break-up during head motion.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: June 9, 1998
    Assignee: CAE Electronics Ltd.
    Inventors: Brian L. Welch, Andrew Fernie
  • Field sequential color head mounted display with suppressed color break-up
    Patent number: 5684498
    Abstract: For displaying moving images on a field sequential color display device from a simultaneous color image source, without color break-up appearing in the observed image, an image shift device is provided for shifting each color component image within each cycle of color component images representing each frame of the simultaneous color video image source. The display device is for use with head mounted displays in which an LCD or a CRT screen is used to display field sequential color images without color break-up during head motion.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: November 4, 1997
    Assignee: CAE Electronics Ltd.
    Inventors: Brian L. Welch, Andrew Fernie
  • High definition television head mounted display unit
    Patent number: 5348477
    Abstract: An optical image is generated by an image source and is transmitted to an optical assembly by a fiber optic cable or cables. The optical assembly includes a transmission lens or lenses, rear projection screens and an eyepiece. By using a rear projection screen in the optical assembly, a non-pupil forming arrangement is provided.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: September 20, 1994
    Assignee: CAE Electronics Ltd.
    Inventors: Brian L. Welch, Paul Weissman
  • Fiber optic coupled helmet mounted display system
    Patent number: 4743200
    Abstract: A fiber optic helmet mounted display system produces a replica of an image derived from an image source for viewing by an observer. The system includes a wide angle eyepiece mounted on the helmet in the line of sight of the observer. Fiber optic cable means transmit the image from the image source to the eyepiece whereby to produce the replica of the image in the line of sight of the observer, the replica appearing to originate at a distance.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: May 10, 1988
    Assignee: CAE Electronics, Ltd.
    Inventors: Brian L. Welch, Joseph A. LaRussa