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Open Access 360-degree Multi-Viewer Autostereoscopic Tabletop Display with Omnidirectional Dynamic Parallax Barrier and Novel Time-Multiplexed Directional Backlight

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The goal of this project is to develop an autostereoscopic tabletop display for multiple viewers freely positioned around the display. 3D content is produced by an omnidirectional dynamic parallax barrier display using dual layer transparent LCD panels. Time multiplexing the parallax barrier’s period and orientation, and the use of a directional backlight allows for displaying 3D content 360° around the table to multiple tracked viewers. The novel directional backlight provides precise addressability of a large number of views using a hemispherical mirror to collimate light from a concentric outwards facing hemispherical LED array.

A prototype was built using two 27” 2560×1440 pixel resolution LCD displays with 144Hz refresh rates. Interactive content and dynamic parallax barriers are rendered in a Unity 3D game engine based upon viewer positions obtained from a Vicon tracking system and a Kalman filter. The addressable backlight consists of 216 LEDs, addressable in 36 rows 10° apart placed on a transparent 38cm (15”) wide hemisphere inside a 76cm (30”) hemispherical concave mirror.

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Document Type: Research Article

Publication date: 14 February 2016

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  • For more than 30 years, the Electronic Imaging Symposium has been serving those in the broad community - from academia and industry - who work on imaging science and digital technologies. The breadth of the Symposium covers the entire imaging science ecosystem, from capture (sensors, camera) through image processing (image quality, color and appearance) to how we and our surrogate machines see and interpret images. Applications covered include augmented reality, autonomous vehicles, machine vision, data analysis, digital and mobile photography, security, virtual reality, and human vision. IS&T began sole sponsorship of the meeting in 2016. All papers presented at EIs 20+ conferences are open access.

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