Autostereoscopic Multi-User Display with Directed Illumination

• Main Author: SCHWERDTNER ARMIN
• Format: Patent
• Language: English
• Published: 25.10.2007
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention relates to autostereoscopic multi-user displays with a sequential representation consisting of a sweet-spot unit and an image matrix. The sweet-spot unit, configured from an illumination and focusing matrix and positioned in front of the image matrix, focuses approximately parallel light bundles in sweet spots onto the eyes of observers. The aim of the invention is to achieve, by optical means, a tracking with a clear image allocation for observers located at a lateral distance from one another that is less than the distance between the eyes. The freedom of movement in terms of the display should be maintained and the information that is assigned to each observer should remain private with regard to other users. To achieve this, the sweet spots are limited horizontally and vertically with the aid of a focusing matrix, which consists of two crossed lens arrays L1 and L2, or a two-dimensional lens array comprising lenses that are arranged in a matrix, or a double lens array. Said focusing matrix forms a sweet-spot matrix comprising two-dimensionally limited sweet-spot pairs, which contain all controllable observer positions. Autostereoscopic displays of this type can be used in a 2 D and/or 3 D mode.