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Volume: 32 | Article ID: art00008
Full-parallax 3D display using time-multiplexing projection technology
  DOI :  10.2352/ISSN.2470-1173.2020.2.SDA-100  Published OnlineJanuary 2020

We enhanced the resolution characteristics of a threedimensional (3D) image using time-division multiplexing methods in a full-parallax multi-view 3D display. A time-division light-ray shifting (TDLS) method is proposed that uses two polarization gratings (PGs). As PG changes the diffraction direction of light rays according to the polarization state of the incident light, this method can shift light rays approximately 7 mm in a diagonal direction by switching the polarization state of incident light and adjusting the distance between the PGs. We verified the effect on the characteristics of 3D images based on the extent of the shift. As a result, the resolution of a 3D image with depth is improved by shifting half a pitch of a multi-view image using the TDLS method, and the resolution of the image displayed near the screen is improved by shifting half a pixel of each viewpoint image with a wobbling method. These methods can easily enhance 3D characteristics with a small number of projectors.

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Takuya Omura, Hayato Watanabe, Naoto Okaichi, Hisayuki Sasaki, Masahiro Kawakita, "Full-parallax 3D display using time-multiplexing projection technologyin Proc. IS&T Int’l. Symp. on Electronic Imaging: Stereoscopic Displays and Applications XXXI,  2020,  pp 100-1 - 100-6,

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