3D TV's What You'll Need At Home

3D TV's What You'll Need At Home Video Clips.

3D: Active vs Passive Right now, whether you're viewing 3D in a movie theatre or in the home, doing so requires those funny glasses. There are two main types of 3D display technology: Passive and Active. In both cases, glasses are used that are matched to the display or projection format. These are generally designed to be worn just like normal glasses, and in fact can be worn over the prescription glasses you may already use. Passive (or Polarized) is the 3D process that's by far the most common in theatres - think RealD and IMAX 3D. In a nutshell, the way the process works in theatres is that two different images - one for your left eye and one for your right eye - are projected at the same time on the screen but through special polarized filters oriented at right angles to each other. The glasses in turn each have matching polarized filters - the left lens matches the left-eye projected polarized image, and the right lens matches the right-eye projected polarized image. This allows each of your eyes to receive its own discrete image, slightly offset from one another, and your brain interprets the resulting visual input as 3D. Active (Active Shutter) is the 3D process that's most common in homes with new 3DTV displays. The advantage of active shutter for the home is that it can deliver a full 1080p image to each eye. The way it works is that the lenses of active shutter glasses are essentially mini LCD screens. When a small electric current is applied to them (via ...

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