METHODS AND APPARATUS FOR UPGRADING A PROJECTOR TO DISPLAY THREE-DIMENSIONAL CONTENT

摘要

An apparatus for upgrading a projector having a two-dimensional projector lens to display three-dimensional content includes a circular polarized filter having at least two polarized zones, and a motor having a shaft on which is mounted the filter. At least one light sensor is disposed in front of the two-dimensional projector lens for providing a spatial control output signal and a temporal control output signal. A processor controls a speed at which the filter is rotated around the shaft of the motor responsive to information determined from the spatial control output signal and the temporal control output signal, such that the filter is automatically adjusted to spin so as to respectively place an appropriate one of the at least two polarized zones of the filter in front of an applicable frame of the video sequence to obtain a polarization thereof representative of the three-dimensional content.