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How the 3D glasses work

At the heart of the 3D viewing experience are Panasonic's TY-EW3D10 3D glasses. These us a system called active shutter technology to create an involving 3D effect. 3D relies on sending separate images to the viewer's left and right eyes.

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To be convincing, 3D systems have to eliminate 'crosstalk', in which the images overlap, which can cause the image to blur and the 3D effect to become fuzzy.

The active shutter glasses use LCD lenses to black out each eye in turn. Each lens is completely 'closed' before the other opens, ensuring you get crisp, perfect 3D.

The shutter glasses have a built-in infra-red receiver to pick up the pulses sent out 120 times a second by the TV's twin transmitters, keeping them perfectly in sync with the pictures on screen.

Because the glasses switch lenses 120 times each second, the effect is far too fast for your eyes to notice any annoying flicker, so they're perfectly comfortable to wear for long periods of time.

And unlike the passive glasses used in cinemas and by some other 3D TV systems, they work from a wide range of viewing angles, and aren't affected by tilting your head.

To add to your viewing comfort, the TY-EW3D10 glasses have been specially designed so that you can wear them over the top of prescription glasses.

The 3D glasses are powered by a small CR2032 watch-style alkaline battery, which gives around 70 hours of viewing. To maximise battery life, the glasses automatically switch themselves off when they can no longer detect a 3D signal. monitors all leading technology stories and rounds them up to help you save time hunting them down.