A viewer and method of displaying information with the viewer are provided. The viewer is configured to rest upon a surface that bears coded data and includes memory for storing display information, a sensor for sensing the coded data when the viewer is resting upon the surface, a processor for decoding...http://www.google.se/patents/US7388221?utm_source=gb-gplus-sharePatent US7388221 - Viewer and method for displaying information based on viewer position
