Patents by Inventor Frederick C. Ellner

Frederick C. Ellner 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).

  • Solid-state, color-balanced backlight with wide illumination range
    Patent number: 7557518
    Abstract: A color balanced solid-state backlight provides feedback control of each color using a single photodetector by imposing a modulation pattern on the solid-state lamps revealing individual colors to the photodetector. The photodetector signal provides feedback controlling color balance over a small range of instantaneous brightness less than larger range of average brightness of the display to provide for accurate color balance throughout a large range of average brightnesses.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: July 7, 2009
    Assignee: Astronautics Corporation of America
    Inventors: Peter A. Zagar, Frederick C. Ellner, Hans C. Hansen