Patents by Inventor Waltraud Rosalie Unger

Waltraud Rosalie Unger 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).

  • Illumination sources and systems
    Patent number: 6164789
    Abstract: The reflectivity of a substrate can be improved by combining a reflective diffuse layer with a specular layer. The light output of individual light sources can be improved by embedding them in a composite diffuse and specular substrate resulting in a superior illumination source. A tapered coupling waveguide having a large input surface can be used to couple the illumination source to a thin waveguide having a relatively small input surface area.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: December 26, 2000
    Assignee: Honeywell International Inc.
    Inventors: Waltraud Rosalie Unger, Scott Moore Zimmerman, Jerry W. Kuper, Tim Chin
  • Back-coupled illumination system with light recycling
    Patent number: 5839823
    Abstract: The light output of a back-coupled illumination system is improved by recycling reflected and misdirected light rays. A reflector at the light source and an array of microprisms having reflective elements therebetween efficiently redirect errant light rays to increase the total available light output and improve efficiency. Both specular and diffuse reflective materials may be used in combination to enhance light output.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: November 24, 1998
    Assignee: AlliedSignal Inc.
    Inventors: Janpu Hou, Waltraud Rosalie Unger, Jerry Wayne Kuper