Patents by Inventor James B. Willoughby

James B. Willoughby 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).

  • Publication number: 20110243500
    Abstract: Lightguides, devices incorporating lightguides, processes for making lightguides, and tools used to make lightguides are described. A lightguide includes light extractors arranged in a plurality of regions on a surface of the lightguide. The orientation of light extractors in each region is arranged to enhance uniformity and brightness across a surface of the lightguide and to provide enhanced defect hiding. The efficiency of the light extractors is controlled by the angle of a given light extractor face with respect to a light source illuminating the light guide.
    Type: Application
    Filed: December 8, 2009
    Publication date: October 6, 2011
    Inventors: Tzu-Chen Lee, David A. Ender, Guoping Mao, Jun-Ying Zhang, James B. Willoughby