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Autostereoscopic display for multiviewers positioned at different distances using time-multiplexed layered directional backlight

Garimagai Borjigin and Hideki Kakeya

Abstract

In this paper, an autostereoscopic display system based on a time-multiplexed directional backlight using a large aperture Fresnel lens is proposed. High-resolution stereoscopy for multiple viewers positioned at different distances from the screen is achieved in the proposed system by layering polymer dispersed liquid crystal screens behind the Fresnel lens. The screens with segmented electrodes are electrically controlled to change the position of light diffusion, while the time-multiplexed backlight is projected by a digital mirror device projector at a high refresh rate. The light is diffused at the conjugate focal points of the observers’ eyes to deliver directional light to each eye. The right-eye image and the left-eye image are alternated on the LCD panel in front of the lens to synchronize with the backlight.

© 2021 Optical Society of America

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Supplementary Material (3)

NameDescription
Visualization 1       This is a video of the actual scene of the one-viewer observation experiment. In the video, the light source spots for the left eye and right eye are projected on the PDLC. The multiple layers of PDLC are switched between opaque and transparent status.
Visualization 2       This is a video recorded by a 3D web camera in the one-viewer observation experiment. The images observed by the left eye and right eye are recorded while the observer's depth position is changed. The stereoscopic images with little crosstalk are observed.
Visualization 3       This is a video of a two-viewer observation experiment. In the video, the light source spots are projected on the PDLC arrays for two viewers at different depths. The proper PDLC segments were turned transparent, while the others stayed opaque.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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