Abstract: A three-dimensional viewing system includes a television having an electric circuit provided therein for the generation of alternating left-eye image and right-eye image on a screen, a micro controller unit provided inside the television and configured to extract a vertical synchronizing signal therefrom, a signal transmitting system for directly transmitting the vertical synchronizing signal to a pair of three-dimensional shutter glasses to be worn by the viewer in front of the television. The shutter glasses include left and right liquid crystal shutter lenses adapted to receive the vertical synchronizing signal and produce alternating transparency and opacity of the left and right shutter lenses. A switch unit connected to the left and right shutter lenses for independently switching the transparency and opacity thereof so that left eye of the viewer sees the left-eye image and right eye of the viewer sees the right-eye image to perceive a three-dimensional image.

Abstract: A 3-D viewing apparatus for viewing moving pictures, the apparatus comprising a left-channel viewer and a right-channel viewer respectively for viewing by left-eye and right-eye of a user, and an electronically controlled shutter mechanism which is arranged to alternatively shut the left-channel viewer and the right-channel viewer such that a user only sees the left- and right- channels through the left- and right viewers respectively. The shutting frequency of the shutter mechanism is predetermined or preset by an electronic controller. The 3-D viewing glass has a shutting mechanism which is arranged to shut the left- and right-viewers at a predetermined, preset or pre-programmed means there is no need to extract electronic synchronization signals from the video source and this makes the 3-D viewing glass more economical and more convenient to use.