Patent ID: 6377295
Filing Date: 2002-04-23
Classification: G02B,H04N

Abstract:
An observer tracking directional display comprising an image display, a parallax device co-operating with the image display to define at least one viewing zone from which the image display is visible, and an observer tracker for determining the position of an observer, wherein the observer tracking directional display further comprises an electromechanical system responsive to the observer tracker for moving the parallax device relative to the image display in discrete steps from any of a plurality of pre-selected steps to any other of the plurality of pre-selected discrete stationary positions so that the viewing zone tracks the position of the observer, andwhen moving the parallax device from any of the plurality of pre-selected steps to any other of the plurality of pre-selected steps having a plurality of intermediate steps therebetween, movement of the parallax device need not stop at each intermediate step therebetween.