A display device having a puck, a display screen, and a controller is disclosed. The puck moves in a puck field of motion on a surface, the field of motion being divided into a pointing region and a function region. The controller determines a position of the puck within the field of motion. The display...http://www.google.com.au/patents/US7701440?utm_source=gb-gplus-sharePatent US7701440 - Pointing device adapted for small handheld devices having two display modes
