Due to the fact that human visionBinocular, for a long time we have been trying to reproduce the three-dimensional image of the world in static stereo images and movies. The film industry at the turn of the 20-21 centuries is developing at lightning speed, offering us all the new technologies of 3D television. In 2011, the dispute between manufacturers about which 3d format is better was most acute.
Leading firms producing three-dimensional TVs,made a choice in favor of using one of the stereo image creation technologies. Namely, LG and Vizio use passive 3D technologies, and Samsung, Panasonic and Sony chose the active option. Everyone proves the advantages of their products, and we ask reasonable questions, which 3d technology is better and when, finally, can we enjoy 3D video without any glasses? It should be noted that Toshiba is already trying to promote equipment to the market for which glasses are not needed. In the meantime, buying a 3D TV, you still need to decide which 3d glasses are better - passive or active.
Passive 3D
Passive stereo glasses are devices notrequiring a power source while viewing 3D content. There are two main subspecies - anaglyph and polarization. Their main advantage is a low cost. The cheapest anaglyphs are made of cardboard and glass of two colors. Creating a certain effect of volume, they also make the picture dull and faded, losing some of the color information.
3D polarized glasses also have twosubspecies: linearly polarized and circularly polarized. To see a stable three-dimensional picture, using glasses with linear polarization, you need to keep your head in an exclusively vertical position. The reason is that when displaying content, one eye observes a vertically polarized image and the other a horizontally polarized image. This disadvantage is corrected in the method of circular polarization, but its use requires a special filter and a projector, so it is unlikely that such 3D glasses will become widespread.
The advantage of the passive technology over the active one is that the viewer simultaneously sees two images and the frame rate is not halved at the same time.
Active (with shutter) 3D glasses
When asked which 3d glasses are better, manufacturersactive models will surely name their products. And to some extent, they will be right. The image quality in such glasses is really higher (the brightness of the color is not lost) and most consumers choose this type of glasses.
For active stereoscopic glasses neededenergy source that feeds the shutter mechanism in the lenses. At the same time, a synchronization device operating using infrared rays is embedded in the TV display. The liquid crystal lenses, opening and closing alternately, show a separate image for each eye. Glasses are powered by small batteries.
These glasses are much more expensive than passive, becausehigh cost of production. Prices range from $ 50 and up to $ 100. In the configuration of most 3D TVs, there is only one pair of stereoscopic glasses, so you will need to purchase several more for collective viewing. The disadvantage of active models can be uneven movement and noticeable jerks. Image quality depends on the frame rate - the higher it is, the better the effect.
Today the question is which 3d glasses are betterremains open. Passive technologies are pleased with the low price, but they are sad not too high quality. In active for a smooth picture, you need a high resolution of Full HD 1080p, which only recently had only plasma panels. Another drawback of active glasses, in addition to their high price, is rapid eyestrain and possible headaches. But, while we are arguing which 3d glasses are better, 3D-television technology without glasses is rapidly evolving, and soon this, currently acute, question will disappear by itself.
