Time multiplexing for increased FOV and resolution in virtual reality

Juan C. Miñano; Pablo Benitez; Dejan Grabovičkić; Pablo Zamora; Marina Buljan; Bharathwaj Narasimhan

doi:10.1117/12.2269973

26 June 2017 Time multiplexing for increased FOV and resolution in virtual reality

Juan C. Miñano, Pablo Benitez, Dejan Grabovičkić, Pablo Zamora, Marina Buljan, Bharathwaj Narasimhan

Proceedings Volume 10335, Digital Optical Technologies 2017; 1033504 (2017) https://doi.org/10.1117/12.2269973
Event: SPIE Digital Optical Technologies, 2017, Munich, Germany

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.

Citation Download Citation

Juan C. Miñano, Pablo Benitez, Dejan Grabovičkić, Pablo Zamora, Marina Buljan, and Bharathwaj Narasimhan "Time multiplexing for increased FOV and resolution in virtual reality", Proc. SPIE 10335, Digital Optical Technologies 2017, 1033504 (26 June 2017); https://doi.org/10.1117/12.2269973

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