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How 3DTV Technology Works

Guide: 3DTV 2010
How 3DTV Technology Works

Want to hear a big secret? 3D television is not what you think it is, or at least what some experts lead you to think it is. There is no magic trickwhen it comes  to how 3D technology actually works. 3D’s goal is to trick your binocular-based brain into thinking that the 2D images you are viewing actually contain depth. Today, there are a growing number of techniques to produce and display 3D television. But now that the secret is out, the most common 3D technology used today is stereoscopic.

With that said, here’s a breakdown of the most common technologies for projecting stereoscopic image pairs to your eyes.  Anaglyphic 3D uses passive red-cyan glasses. Polarization 3D uses a pair of passive polarized glasses. Alternate-frame sequencing is another type of stereoscopic technology that uses active shutter glasses and headgear to receive the images. And finally, we have autostereoscopic displays, a form of stereoscopic imaging that does not require glasses to experience the illusion of depth.  

Some 3D-ready TV sets available today are already being used in conjunction with a pair of LCD shutter glasses. The television is actually running the show in this case, telling the glasses which eye should see the image, which in turn creates the stereoscopic image. These kinds of 3DTVs are typically supporting the latest HDMI (1.4) and a minimum refresh rate of 120Hz.

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