What Is The Technology Behind 3d Televisions?

The recent advancements in 3D television technology have been astounding

. The potential for growth in the market is significant with more 3D content being created such as new 3D TV channels. The technology behind 3D televisions and how it works is definitely impressive.

Projected 3D images work by sending a slightly different image to each of your eyes. With traditional red and blue glasses, the different images were projected in red and blue and the glasses filtered out one or the other to create the 3D effect. Also, another method of producing a 3D image is using polarized lenses in the 3D glasses. Two different polarized images are shown and each lens blocks out one of the images providing a complete color 3D effect. This is the method used in IMAX and other theaters that show 3D films. Because of the 3D revolution in movie theaters, television manufacturers are moving towards 3D-at-home and 3D TV technology. However, the two forms for producing 3D in the theater do not work in home television watching. Movie theaters use multiple projectors to produce the extra layers which cannot be done with a television. The polarized 3D glasses worn in movie theaters today are not suitable for home television viewing.

LCD shutter glasses are worn when watching 3D television which operate a system called 'active technology.' Active shutter glasses work by alternately blocking the vision in each eye simultaneously with the refresh rate of the display screen. 3D TVs using this technology will display alternate images with a bit of differing perspectives at a high rate. The shutter glasses darken each lens in time with the alternating images. It basically blocks what image enters which eye. Shutter glasses actually blacks out the lenses at a high rate of speed. As a result, shutter glasses provide a clearer picture. Most 3D TVs require LCD shutter glasses.

There is however differences in how certain manufacturers' 3D TVs work because each of the manufacturers develops their own form of 3D TV technology. For instance, there are Plasma 3D TV models, LCD 3D TV, models, and LED 3D TV models with each using different displays. Also, there are a couple of 3D televisions manufacturers that claim they produce 3D images without requiring shutter glasses. They achieve this by using either a parallax barrier or a lenticular lens on the surface of the display. The parallax barrier is a mesh of angled holes across the screen's surface that directs different light into each eye causing images to leap of the screen. Viewers have to look directly at the screen to see the 3D.

It appears that 3D TV is here to stay and it is forecasted to grow in demand. Consumers would rather be able to view 3D without having to wear the glasses so it is predicted that the future of 3D TV will be the technology not requiring glasses. Understanding how 3D TV works will help you decide when it is the time to buy a 3D TV.

by: Paul Malcolm

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