Autostereoscopic display with a passive cycloidal diffractive waveplate

摘要

A new beam deflection approach is provided for displaying images in autostereoscopic format. Conceptually, polarized light from a display is directed into specific viewing regions using a polarization-sensitive beam deflection sub-system that comprises, in exemplary embodiments, an active liquid crystal quarter-wave plate modulator and a passive cycloidal grating element, such as a diffractive waveplate. Specific embodiments may comprise an illumination system that both floods an LCD panel and creates a defined eye pupil region, from within which the display is viewable. Deflecting the pupil region between left and right eye positions in synchronization with displayed frame sequential stereo image data creates desirable autostereoscopic 3D viewing. Other embodiments employ a similar beam deflection sub-system in conjunction with a means of viewing subsets of pixels from different viewing positions, such as a parallax barrier or lenslet array, allowing freedom of head movement while maintaining stereo viewing.

主权项

1. An autostereoscopic display, comprising:
a display panel providing stereoscopic imagery; a polarization modulator configured to modify polarization of light received from the display panel, wherein the polarization modulator is configured to impart right-handed or left-handed circular polarization on light received from the display panel; and a polarization-sensitive beam deflector configured to direct light received from the polarization modulator based on the modified polarization.