In other words, although the first models were not too expensive, you would not need one in your room anyway. Not yet, anyway. However television in 3-D glasses that requires increased with the addition of passive glasses. Active glass are heavy, expensive batteries are required and need to be in constant communication with an IR emitter on the top of the TV to stay in sync. They were the standard for TV buyers so far. Passive glass are the same type you use on a movie theater when you go, see a movie like Avatar, and now they come with television. They are light, cheap (you can only get out of a theater with a couple), does not need batteries, and because they do not need to communicate with the TV at all, they are universal . Passive glasses work with TV from a friend.
At the technical level, working actively flipping glasses open and close the LCD glass thousands of times per minute to be sure of the right eye receives the images for the right eye and vice versa. Passive glasses work with polarized lenses that match the polarization of the images shown on television. In addition to making them much cheaper and easier, so this design minimizes crosstalk. Crosstalk occurs when images are limited to one eye seems unintentionally to both eyes, making a Flickery, the ghostly image. This symptom usually occurs from the fundamental inaccuracy of trying hard to get a pair of glasses and a TV to perform a dance coordinated split-second maneuvers 60 times per second. It is not always going to be perfect. Since passive glasses are not subjecting to the same thin margins Razer gaffe, they help to reduce crosstalk.
In 2011, both LG and Vizio TV offer passive display technology - but not all TVs only in their lines. LG migrate all new passive LCD TV 3D technology, but all 3D plasmas will remain active. LG will offer passive technology of its flagship television, as the 65-inch 3D HDTV Theater LED, edge-lit.
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