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HOW 3D TECHNOLOGY REALLY WORKS :

Posted 06 September 2010 | News & Blog   

Plasma LCD N Parts of Houston, tells you how 3D technology really works. Is it right for you? We decided that its NOT the best.
LCD PLASMA LED TV lead the industry on retail purchase, even though 3D is very new to the scene, we do not see it competing with the big boys of entertainment.

HOW IT WORKS

To “see” in 3D, a slightly different image must be delivered to each eye. This is traditionally done with special glasses. To your brain, these ever-so-similar overlapping images create the illusion of depth.
Anaglyph images and glasses are the most basic way to deliver a 3D effect. Chances are everyone has seen the red and blue glasses made popular during earlier attempts at a 3D revival.

These work by filtering an image composed of two almost identical superimposed color layers. Anaglyph technology is still used today and will work with any TV or projector. However, it provides the poorest 3D image quality.
Many of today’s cinematic 3D experiences are delivered via polarizing systems. These send the projector’s light through polarizing filters that force the light waves to oscillate in two different directions, one intended for the left eye, the other for the right. A special polarization preserving screen is required.
Filters on the glasses allow the lenses to passively pick up the light (read: image) meant for each eye. The brain combines the two images and tada! 3D.
Color is improved and cross-talk (when one eye picks up an image meant for the other) is virtually eliminated with the polarizing method compared to anaglyph. However, the image’s brightness is greatly reduced since each eye only picks up half the light from the screen. Some theaters use two separately polarized projectors to compensate for this.
All the 3D-ready projectors available in the commercial and residential market today use active shutter glasses to deliver the third dimension. WE expect this will be the standard for all 3D DLP projectors in the future.
In this setup, the image on the screen alternates rapidly between scenes intended for each eye. The glasses respond by opening and closing the corresponding lens. (When the right-eye image is on the screen, the glasses shut the lens of the left eye.)
Active shutter glasses are more expensive than those required for the other technologies. Currently, they run at about $99 and may not work on all manufacturers’ displays. However, Xpand recently released universal shutter glasses. As more competitors enter the market, we expect the cost of active shutter glasses to drop soon.
With active shutter glasses, cross-talk is nearly impossible. However, the image is significantly dimmer than its 2D counterpart.
So far, all 3D DLP projectors use the DLPLink protocol to sync the glasses and the screen. We predict this setup, in which a white light is beamed from the projector to the screen to the glasses, will become the standard for 3D projection.

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