Multi-user autostereoscopic display with position tracking

• Main Author: SCHWERDTNER ARMIN
• Format: Patent
• Language: English
• Published: 16.08.2007
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

An autostereoscopic multi-user display comprising a sweet-spot unit which is directionally controlled by a tracking and image control device ( 160 ), wherein an illumination matrix ( 120 ) is provided with separately activatable illuminating elements ( 11 . . . 56 ), in addition to an imaging device used to alternatingly image active illuminating elements, for making expanded sweet spots (SRI/SR 2 ) visible to various eye positions (EL 1 /ERI, EL 2 /ER 2 ) of viewers observing alternating images or a stereoscopic image sequence on a transmissive image matrix ( 140 ) with the aid of directed beams (B 1 R . . . B 5 L). According to the invention, the imaging device comprises an imaging matrix ( 110 ) provided with a plurality of lens elements ( 111 115 ) whose focal length is small in order to image the active illuminating elements in an enlarged manner onto the sweet spots (SRI/SR 2 ), and a field lens ( 171 ), which follows the imaging matrix ( 110 ), in order to keep the distances of the activated illuminating elements between adjacent beams (B 1 , B 2 ,B 4 , B 5 ) as constant as possible and in order to assist selection of the directions (D 1 . . . D 5 ) with the illumination matrix ( 120 ) for the beams.