Unique Original Articles » What is 3D TV and do I need one now?

There are several techniques to produce and display 3D moving pictures. The basic requirement is to display offset images that are filtered separately to the left and right eye. Two strategies have been used to accomplish this: have the viewer wear eyeglasses to filter the separate offset images to each eye, or have the light source split the images directionally into the viewer's eyes (no glasses required). Common 3D display technology for projecting stereoscopic image pairs to the viewer include: With lenses, Anaglyphic 3D (with passive red-cyan lenses). Polarization 3D (with passive polarized lenses). Alternate-frame sequencing (with active shutter lenses). Head-mounted display (with a separate display positioned in front of each eye, and lenses used primarily to relax eye focus). Without lenses: Auto stereoscopic displays, sometimes referred to commercially as Auto 3D. 3D-ready TV sets are those that can operate in 3D mode (in addition to regular 2D mode), in conjunction with a set-top-box and LCD shutter glasses, where the TV tells the glasses which eye should see the image being exhibited at the moment, creating a stereoscopic image.
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