Patents Represented by Law Firm Woodcock, Washburn, Kurtz, Mackiewick & Norris
  • Methods and apparatus for eliminating Moire interference using quasiperiodic patterns
    Patent number: 4894726
    Abstract: Improved methods for reproducing an image are disclosed. Images are created using dots or patterns which are substantially quasiperiodic and thereby eliminate Moire interference patterns. In multi-color applications, the disclosed methods simplify the color overlay process. Also disclosed are patterns for creating half-tone images which do not exhibit Moire interference patterns when overlaid. Electronic display apparatus using these patterns are also disclosed.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: January 16, 1990
    Assignee: Trustees of the University of Pennsylvania
    Inventors: Paul J. Steinhardt, Philip Taylor