Patent ID: 8331023

Claim:
An adjustable parallax barrier 3D display comprising: a display for displaying a left-eye image and a right-eye image; a main parallax barrier disposed in front of the display; at least one secondary parallax barrier disposed between the main parallax barrier and the eyes of the an observer, the at least one secondary parallax barrier and the main parallax barrier each having a respective width or distance from the observer; a tracking system for tracking locations of both eyes of the observer in front of the main parallax barrier; and a controller for computing at least one of 3D display parameters according to the tracked locations of the eyes; wherein a utilized parallax barrier among the main parallax barrier and the at least one secondary parallax barrier is determined and activated by the controller according to a distance between the eyes of the observer and the display of the adjustable parallax barrier 3D display, wherein the utilized parallax barrier is adjusted according to the at least one of 3D display parameter to shelter the left-eye image from being seen by a right eye of the observer and shelter the right-eye image from being seen by a left eye of the observer.