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Proceedings Paper

Time multiplexing for increased FOV and resolution in virtual reality
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Paper Abstract

We introduce a time multiplexing strategy to increase the total pixel count of the virtual image seen in a VR headset. This translates into an improvement of the pixel density or the Field of View FOV (or both) A given virtual image is displayed by generating a succession of partial real images, each representing part of the virtual image and together representing the virtual image. Each partial real image uses the full set of physical pixels available in the display. The partial real images are successively formed and combine spatially and temporally to form a virtual image viewable from the eye position. Partial real images are imaged through different optical channels depending of its time slot. Shutters or other schemes are used to avoid that a partial real image be imaged through the wrong optical channels or at the wrong time slot. This time multiplexing strategy needs real images be shown at high frame rates (>120fps). Available display and shutters technologies are discussed. Several optical designs for achieving this time multiplexing scheme in a compact format are shown. This time multiplexing scheme allows increasing the resolution/FOV of the virtual image not only by increasing the physical pixel density but also by decreasing the pixels switching time, a feature that may be simpler to achieve in certain circumstances.

Paper Details

Date Published: 26 June 2017
PDF: 6 pages
Proc. SPIE 10335, Digital Optical Technologies 2017, 1033504 (26 June 2017); doi: 10.1117/12.2269973
Show Author Affiliations
Juan C. Miñano, Univ. Politécnica de Madrid (Spain)
Pablo Benitez, Limbak 4pi S.L. (Spain)
Dejan Grabovičkić, Limbak 4pi S.L. (Spain)
Pablo Zamora, Limbak 4pi S.L. (Spain)
Marina Buljan, Limbak 4pi S.L. (Spain)
Bharathwaj Narasimhan, Limbak 4pi S.L. (Spain)

Published in SPIE Proceedings Vol. 10335:
Digital Optical Technologies 2017
Bernard C. Kress; Peter Schelkens, Editor(s)

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