Three Dimensional Screens – the Technology Explained

When it comes to consumer electronics, there is no greater hype than 3D television. People want to watch 3D movies in their own home, now that they have seen them in cinemas. The supply of 3D technologies is growing rapidly these days. Creating a 3D image on televisions, can be done in a couple of ways. Some methods are more expensive than others. But other methods are more easily doable by manufacturers. Before a manufacturer brings 3D tv to the market, he will have to think about these trade offs. There exist three main technologies for creating 3D images on televisions.

Lenticular viewing. The Philips company came up with this one over a few years ago. This technology allows people to watch 3D without the well known 3D glasses. Most people think the glasses are either silly, cumbersome, or a combination of both. The lens used in televisions based on the lenticular viewing concept, send a different image to each eye. The left eye's image is going to differ slightly from the one that is sent to the right eye. A small viewing angle is the downside to this type of television. And they cannot be watched by multiple persons.

Passive glass systems. Currently, the Hyundai company is developing an LCD monitor which will allow for both 2D as well as 3D viewing. For viewing the 3D images that these televisions show, you must wear 3D glasses. The television will display two overlapping images. Each eye sees only one image, due to the polarized lenses in the glasses. This creates a very convincing three dimensional effect. You can already buy televisions like these today. A typical size for these screens is about 50 inches.

Active glass systems. This technology is much like the passive glass system, but not quite. The biggest difference is that the television is not responsible for most of the 3D effect. The effect is almost completely produced by the glasses. For starters, the glasses have to be synchronized with the television's refresh rate. Then, the television displays for left and right eye alternatingly. The shutter system in these glasses will make sure that the right eye only sees the images for the right eye. It goes without saying that the same happens for the left eye. This effectively halves the refresh rate of the television. It's highly recommend that you get a television with at least a 120Hz refresh rate when using active shutter glasses.

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