Huge 3D Displays without 3D Glasses

Billboards of the future could show astonishing 3D effects. (Source: TriLite)

Billboards of the future could show astonishing 3D effects. (Source: TriLite)

Public screenings have become an important part of major sports events. In the future, we will be able to enjoy them in 3D, thanks to a new invention from Austrian scientists. A sophisticated laser system sends laser beams into different directions. Therefore, different pictures are visible from different angles. The angular resolution is so fine that the left eye is presented a different picture than the right one, creating a 3D effect.
The young start-up company TriLite Technologies and TU Vienna have created the first prototype with a resolution of five pixels by three, but  “[s]caling it up is not a problem”, says Jörg Reitterer from TriLite Technologies and PhD-student in the team of Professor Ulrich Schmid at the Vienna University of Technology.
Every single 3D-Pixel (“Trixel”) consists of lasers and a moveable mirror. “The mirror directs the laser beams across the field of vision, and the laser intensity is modulated so that different laser flashes are sent into different directions”, says Schmid. To experience the 3D effect, the viewer must be positioned in a certain, tunable distance from the screen. If the distance is too large, both eyes receive the same image and only a 2D picture can be seen.
3D movies show two different pictures – one for each eye. The novel display, however, can present hundreds of pictures. Walking by, one can get a view of the displayed object from different sides, just like passing a real object. This requires a new video format which has already been developed by the researchers. “Today’s 3D cinema movies can be converted into our 3D format, but we expect that new footage will be created especially for our displays – perhaps with a much larger number of cameras”, says TriLite CTO Franz Fiedler.
Compared to a movie screen, the display is very vivid and can be used outdoors, even in bright sunlight. This is not only interesting for 3D-presentations but also for targeted advertisements., e. g. for displaying one ad for customers leaving the shop across the street, and a different one is shown to the people waiting at the bus stop. The second prototype should be finished by mid-2015, the commercial launch is scheduled for 2016. (Source: Optik & Photonik 1 / 2015)

Referenz: J. Reitterer et al.: Design and evaluation of a large-scale autostereoscopic multi-view laser display for outdoor applications, Opt. Express 22, (2014) 27063; DOI: 10.1364/OE.22.027063

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