How 3D TV works ?

Since the 3D TVs sold millions of copies it would be good not easily explain how it specifically works.

Basically there are two types of 3D TVs, they alternate with those showing the simultaneous display.

3D TVs to display alternating images must create an image for each eye separately. This in short is that the frequency of 50Hz, which is generally the standard for today's television sets to make the 25 frames for the left eye and 25 frames for the right eye. Due to the inertia of the eye will not notice a decrease in frequency from 50 to 25 Hz (think of the overall picture) you will have the impression of watching a true 3D display. To make an impression was right, there are active 3D glasses via infrared signals must be synchronized with the TV on the way to open a passage for the image on one side for the TV displays the image. So when the TV displays the image to the right eye, the glasses are only missing files in the right eye, a glass left eye is dimmed, and vice versa.

If it is difficult to conceive try a little experiment. Hold out your hand and place the palm vertically between the two eyes, leaning his hand on your nose to your hand represent a visual barrier between the two fields of vision. Close the left eye and observe an object with his right eye, then close your right eye and observe the same object left eye without moving the head. You may notice a slight difference between these two figures. If you now try to alternate between open and close your eyes you will realize that things are done in active glasses. Of course you can not blink their eyelids so fast, but it's actually it.

The benefit of these TVs is that every picture you see at full resolution because they go alternately so the TV has all the lines for each frame.
The negative thing is that you must have a very difficult and expensive active glasses and a special model that fits your TV.3D TVs with passive glasses working on a different principle. Namely, these TVs are always at the same time showing a picture for each eye in turn and not allowing the TV to the lower frequency. The point is that every picture has 1080 lines that are drawn on the screen. If these lines alternately polarized in another direction then we have two pictures simultaneously, one for the left eye and one for right. So the first line (and every subsequent odd) are polarized in the clockwise direction and the second (and any subsequent vapor) in the direction opposite of clockwise. To view the 3D image is necessary to look through the glasses that have polarized glass aligned with the polarization of the TV screen, with a glass polarized in a clockwise direction and the second glass the other way around. This means that one eye to see a picture made up of lines that are polarized in the clockwise direction, a second line around the image of the polarized opposite of an hour.
The benefit of these TVs is that they can operate at lower frequencies, making them cheaper, and the glasses are too expensive and slow because they have no batteries or mechanisms. These are ordinary eyeglasses and may even be a good design, so do not even notice it's there.
The negative thing is that you lose no resolution, namely half resolution goes to the left about a half right there on the losing picture quality which can be seen in the picture when you have a hair line, they just look jagged.