Laser light field display

Rui Vasconcelos; Jonas Zeuner; Chiara Greganti

doi:10.1117/12.2608113

3 March 2022 Laser light field display

Rui Vasconcelos, Jonas Zeuner, Chiara Greganti

Proceedings Volume 12024, Advances in Display Technologies XII; 1202407 (2022) https://doi.org/10.1117/12.2608113
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Light field displays offer an unparalleled visual 3D experience to viewers but suffer from low resolution, low number of views and small field of view (FOV). We propose a light field display design based on a laser-lit backlight, a liquid crystal panel and a beam-splitting diffractive layer to overcome these shortcomings. The backlight developed by VitreaLab contains an integrated photonic circuit embedded in glass which distributes laser light over an array of millions of tightly confined single mode laser beams that illuminate, one by one, the subpixels of the liquid crystal panel. Each beam is split into multiple beams by the diffractive layer, directing light into precise viewing positions. The eyes of the (single-) viewer are dynamically tracked and only the correct viewing positions are displayed. We envisage a laser light field display with extremely low cross-talk (X < 0.1%), high view zone brightness uniformity (K > 95%) and smooth motion parallax with N > 200 views, all while using a low trade-off factor (4×) between resolution and number of views. This means, that each view has a 4× lower resolution than the base panel, a much better trade-off than in conventional light field displays, where this factor can reach 100×. Furthermore, a variable viewing distance is supported for a wide field of view (FOV> 100^◦ ).

Conference Presentation

Citation Download Citation

Rui Vasconcelos, Jonas Zeuner, and Chiara Greganti "Laser light field display", Proc. SPIE 12024, Advances in Display Technologies XII, 1202407 (3 March 2022); https://doi.org/10.1117/12.2608113

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