STEREOSCOPIC VIDEO DISPLAY FOR COMPATIBILITY BETWEEN 2D/3D IMAGES USING POLARIZATION GRATING SCREEN

摘要

PROBLEM TO BE SOLVED: To provide a stereoscopic video display capable of switching between a 2D mode and a 3D mode using two polarization grating screens.

SOLUTION: The stereoscopic video display includes a display element providing an image and a parallax barrier unit that transmits all incident light in the 2D mode and forms barriers to separate an image for a left eye from an image for a right eye in the 3D mode by moving two facing polarization grating screens relative to each other. The polarization grating screens have a grating pattern such that two kinds of birefringence elements changing the directions of polarization of incident light into opposite directions are alternately disposed horizontally and vertically in two dimensions, and the grating pattern of the polarization grating screen is shifted step-wise with respect to each row of the grating pattern by a predetermined distance.

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