Patents by Inventor Cheryl Achtenhagen

Cheryl Achtenhagen 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).

  • Rear projection display using laser excited photoluminescence
    Patent number: 8696136
    Abstract: A display system includes an optical light source and a display panel with an array of optically excitable pixels. Optics are positioned between the optical light source and the display panel so as to direct light from the optical light source toward the display panel to cause the optically excitable pixels to emit a visible image.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: April 15, 2014
    Assignee: Photodigm, Inc.
    Inventors: Preston P. Young, John Edward Spencer, Cheryl Achtenhagen
  • Single-frequency distributed feedback laser diode with complex-coupling coefficient and transparent conductive cladding layer
    Patent number: 8548022
    Abstract: The illustrated embodiments provide a system and a method of manufacture for a complex-coupled distributed feedback laser diode. The improved laser diode has a complex-coupled metal grating to enforce the laser to emit in a longitudinal single-frequency and suppress dynamical instabilities. In addition, the improved device uses a transparent conductive cladding layer over the metal grating and makes therefore the need for re-growth redundant.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: October 1, 2013
    Inventors: Nuditha Vibhavie Amarasinghe, Cheryl Achtenhagen
  • Single-Frequency Distributed Feedback Laser Diode with Complex-Coupling Coefficient and Transparent Conductive Cladding Layer
    Publication number: 20130022073
    Abstract: The illustrated embodiments provide a system and a method of manufacture for a complex-coupled distributed feedback laser diode. The improved laser diode has a complex-coupled metal grating to enforce the laser to emit in a longitudinal single-frequency and suppress dynamical instabilities. In addition, the improved device uses a transparent conductive cladding layer over the metal grating and makes therefore the need for re-growth redundant.
    Type: Application
    Filed: April 25, 2012
    Publication date: January 24, 2013
    Inventors: Nuditha Vibhavie Amarasinghe, Cheryl Achtenhagen
  • Rear Projection Display Using Laser Excited Photoluminescence
    Publication number: 20120195021
    Abstract: A display system includes an optical light source and a display panel with an array of optically excitable pixels. Optics are positioned between the optical light source and the display panel so as to direct light from the optical light source toward the display panel to cause the optically excitable pixels to emit a visible image.
    Type: Application
    Filed: October 28, 2011
    Publication date: August 2, 2012
    Applicant: Photodigm, Inc.
    Inventors: Martin Achtenhagen, Cheryl Achtenhagen, Preston P. Young, John Edward Spencer