3D television is without any doubt the latest hype in consumer electronics. Ever since 3D movies started to hit cinemas, people have wanted to watch movies in 3D at home. In the near future, the market will be flooded with 3D televisions. There exist several technologies to create a 3D image on televisions. Some ways of doing it are more pricey than others. But other technologies are easier to build. Some of these trade offs have to be considered by manufacturers before they start producing 3D consumer electronics. There are three main technologies for making 3D televisions.
Lenticular viewing. A technology that the Philips company came up with a few years ago. A special 3D set of glasses are required to watch television in three dimensions with this technology. A lot of people, however, feel the glasses are kind of cumbersome. Televisions with lenticular viewing technology, use a lens that sends different images 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. It's impossible for multiple people to watch this in all its three dimensional glory.
Passive glass systems. The Hyundai company is creating an LCD screen that can be used for both 3D and 2D viewing. For viewing the 3D images that these televisions show, you must wear 3D glasses. These screens can display two images which overlap. Each eye sees only one image, due to the polarized lenses in the glasses. A very impressive three dimensional effect is created this way. Televisions like these can already be purchased today. They come in the sizes of about 40 to 50 inches.
Active glass systems. This system works almost like the system with passive glasses. The main difference is that the 3D effect doesn't come from the television. The glasses by themselves almost completely produce the effect. For starters, the glasses have to be synchronized with the television's refresh rate. Images for the left and right eye will then be displayed alternatingly by the television. The active shutter glasses will make sure the right eye sees the images meant for the right eye. The left eye will see only the images meant for the left eye. Because of how this system works, the television's refresh rate is basically cut in two. When using active shutter glasses, it's best to have a television with at least a 120Hz refresh rate.
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