Today, there is a tacit struggle between the two technologies of displaying 3D images, which can be seen using special active or passive polarizing glasses.
The latter include any stereo glasses, which do not require the presence of a power source. There are two types of devices working on this technology: polarization and anaglyph.
Despite the fact that this method allowsto get some effect of volume, yet it is considered not the most advanced in creating 3D effects. In anaglyph stereopairs, a certain color filter is used to produce a picture, while the rest of the information is practically lost, leaving a faded, dim image.
Polarizing 3D glasses can be divided into twosubspecies: with circular and linear polarization. The latest imaging model requires the viewer to position his head in a strictly vertical position, avoiding deviations to the sides, otherwise the 3D effect may be disturbed.
When the head tilts, the lenses lose contact with the doubledmethod of obtaining stereopairs on the screen. Eliminate this disadvantage of polarized 3D glasses, working on circular technology. However, in this case, you need a special filter and a projector. In this form, glasses are not common.
Another advantage of passive devices before active is that there is no "halving" of the frame rate, because the viewer is simultaneously shown two images.
However, polarization glasses also have a numbershortcomings. Unlike active, in passive models the viewer can see only 540 lines of the entire resolution for each eye. Of course, this is provided that the image source issues a resolution of 1080 lines.
The advantages of eyepieces include lack ofthe need for a power supply, adjustment to an image transmission device, and also cheapness. Polarization glasses can be purchased for a few dollars, and most often the TV maker additionally puts several pairs of such products in the kit. For example, with a TV LG goes 4 pairs of glasses.
Therefore, under these conditions, arrange a movie forthe whole family in 3D format will be much cheaper. In addition, with the use of polarized devices, the eyes do not get tired, since they do not have constantly opening and closing gates, as in active technology. In addition, these glasses have less weight, and when watching a movie, people become less tired.
Currently, using passive3D technology produced LG TVs, Toshiba (supports both principles), Vizio and other brands. Samsung, Sony and Panasonic use an active image output model.
