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Watch TV in 3D

Watching an advert the other day, they mentioned 3-D TV - without glasses. No I know I might be blonde, but how does 3-D TV work if you don't have the glasses?

Go to watch a 3-D movie and you have to sit there with silly glasses on, which are uncomfortable for some, and the need to wear them means you'll need multiple pairs if watching with friends or family. The cost of the glasses alone are expensive, although you are supplied with four pairs when you buy an LG 3-D TV, so it's easy to see why many of us have been reluctant to jump in and buy a 3-D TV.

New developments in passive 3D TV technology have helped solve some of these problems with the introduction of cheaper, lighter glasses, plus the fact that the price of the TVs are coming down gradually.

Though several methods already exist for glasses-free 3D TV, too many problems have been encountered. The two main breakthrough technologies that solve this problem of no glasses 3D TV are known as parallax barrier or lenticular lens technology. These methods of delivering 3D TV without glasses are also known as autostereoscopy, and the 3D TVs that deliver them are built using what's termed as 'autostereoscopic screens'. Additionally, recent developments in head tracking 3D technology give us a third solution, where a built in webcam locks on to a viewers eyes and displays the split in images required for that viewer to 'see' in 3D - adjusting the images emitted from the display as the viewer moves.

However, as of 2011, none of the methods of delivering no glasses 3D TV have been perfected and picture quality cannot currently rival that of using 3D glasses. The problem is that we need to be able to watch TV content from multiple different positions and still get the 3D effect, and with the no glasses models seen so far there's a requirement to sit at an optimal position (height and distance from the display) or the 3D effect is lost.

Manufacturers continue on research and development and it's pretty much guaranteed that the major manufacturers will find a way to give us 3-D TV without glasses within the next few years - at a price that's affordable and a quality that makes it all worthwhile. See keep all three eyes on the lookout!