Patents by Inventor Michael I. Boyd

Michael I. Boyd 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).

  • Display apparatus
    Patent number: 4582394
    Abstract: In order to prevent ambient light severely reducing the contrast of a display on a tricolor cathode ray tube, a holographic element having reflection wavelength peaks between the emission wavelength peaks of the cathode ray tube is disposed in the light path from the display to the observer. The holographic plane of reflection is preferably inclined to the substrate plane of the element so as to direct unwanted light away from the observer. The display may be head-down or head-up.
    Type: Grant
    Filed: June 15, 1983
    Date of Patent: April 15, 1986
    Assignee: Pilkington P.E. Limited
    Inventor: Michael I. Boyd