Viewer-tracked autostereoscopic 3D display with dynamic electrically-controlled parallax barrier

• Main Authors: WON WOOK SO, JONG HEUM PARK, KYU CHIN KIM, HONG BOK WE
• Format: Patent
• Language: English
• Published: 15.08.2012
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

A method of controlling a three dimensional autostereoscopic display comprising tracking changes in a userâ s viewpoint, and electrically moving a parallax barrier corresponding to the detected variation in the userâ s viewpoint. The parallax barrier may comprise continuous sub-segments that transmit or block a right image and a left image, corresponding to the userâ s right and left eyes, by electrical on/off signals to form an image transmission region and an image blocking region in order to provide a 3D image to the viewer. The amount of electrical movement of the barrier may correspond to the userâ s viewpoint variation. A video camera may track the userâ s gaze and display a photograph of the user so that the user can check viewpoint tracking. The screen may display a 2D image as well as a 3D image. An acceleration sensor or angular speed sensor may detect a variation in the relative position of the display with respect to the userâ s view. The tracker and parallax barrier may use synchronised absolute co-ordinates and operate in real time. This display may be used on a mobile device such as a mobile phone.