What are 3D TVs
True to its name, a 3D television elevates the levels of entertainments to the next level by adding, quite literally, another dimension to the conventional means of home entertainment. More technically speaking, 3D television adds the dimension of depth to those of height and width, or the two dimensional technology. The three dimensional viewing experience is exhilarating and images take a realistic form. It is a scintillating experience to witness the serials and movies being enacted in 3D, right in your living room. Not only this, 3D televisions also make the medium through which all other kinds of 3D content reaches you.
Though the mathematics and optics behind the whole theory of 3D viewing are pretty bedazzling, but a simpler view of the whole scenario suffices in explaining the mechanisms behind 3D technology to the layman. Actually, a 3D television is one that is capable of producing and projecting 3D images. What it does is produce two separate images for the same frame. One of these images is for the right eye of the beholder, and the other one for the left eye. This mechanism takes place for every frame of every scene. Hence, it can be very well imagined that the television has to work at an unearthly rate in order to stay in phase with the content it is playing. Though there are dissimilarities between these two images, but as seen by the normal eye, these images overlap over the entire screen and mix amazingly well into each other, so much so that it is impossible to realize that there are actually two separate images on the screen. Actually, the main objects of the frame are duplicated in the two images, but are skewed with respect to each other. Thus, they can be imagined as a complementary pair of left and right sketches of the frame. After the task of production of two images per frame is done, the television projects these images.
In order for these images to combine in such a way that they create a three dimensional impression upon the human eye, it is essential that they are viewed through a special device. This device is called the 3-D glass. Viewers have to wear the special lenses to experience the 3-D spectacle. A process called stereopsis controls all these fascinating image interplays. The human eyes are separated by an average distance of about two and a half inches. Thus, they perceive an image from two different angles. The creation of two separate images at different angles, when accentuated by the biological reception behavior of the two eyes and aided by the sophisticated and intelligently designed 3-D glasses, create an awe inspiring three dimensional theatre in your living room where you can enjoy loads of 3-D digital content. The stereopsis technique is a substantial improvement over the rather obsolete method of using red and cyan colored glasses to create the 3-D effect. Not only is the latter method cumbersome, it is also a compromise on the resolution of the content you watch.