Active and passive 3D: which 3d glasses are better?
In connection with the fact that vision in humansbinocular, we have been trying for a long time to reproduce the three-dimensional image of the world in static stereotypes and movies. The film industry at the turn of the 20th-21st centuries is developing at lightning speed, offering us all the new technologies of 3D television. In 2011, the most controversial dispute between manufacturers about which 3d format is better.
The leading companies producing three-dimensional TVs, made a choice in favor of using one of the technologies for creating a stereo image. Namely, LG and Vizio use passive 3D technologies, and Samsung, Panasonic and Sony have chosen the active option. Everyone proves the advantages of their products, and we ask ourselves reasonable questions, which 3d technology is better and when, finally, you can enjoy 3D video without any glasses? It should be noted that Toshiba is already trying to promote the technology on the market, for which no glasses are needed. In the meantime, when buying a 3D TV, you have to decide which 3d glasses are better - passive, or active.
Passive stereo glasses are devices that do notrequiring a power source while viewing 3D content. There are two main subspecies - anaglyphic and polarizing. Their main advantage is low cost. The cheapest anaglyphs are made of cardboard and glass of two colors. Creating a kind of volume effect, they make the picture dim and faded, losing some of the color information.
Polarization 3D glasses also have twosubspecies: linearly polarized and with circular polarization. To see a stable volumetric picture, using glasses with linear polarization, you need to keep your head in an exceptionally vertical position. The reason is that when displaying content, one eye observes a vertically polarized image, and the other is horizontally polarized. This drawback is corrected in the circular polarization method, but its use requires a special filter and a projector, so it is unlikely that such 3D glasses will become widespread.
The advantage of passive technology before the active one is also that the viewer sees simultaneously 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 confidently call their products. And to some extent, they will be right. The image quality in such glasses is indeed higher (color brightness is not lost) and most consumers choose this type of glasses.
For active stereoscopic glasses, you needA source of energy that feeds the gate mechanism in the lenses. In this case, the device for synchronization, working with the use of infrared rays, is built into the TV screen. Liquid crystal lenses, opening and closing in turn, show each eye a separate image. Eats glasses from small batteries.
Such glasses are much more expensive than passive ones, because ofhigh production costs. Prices range from 50 to 100 dollars. In the configuration of most 3D TVs there is only one pair of stereoscopic glasses, so for collective viewing it is necessary to purchase a few more. Disadvantage of active models can be uneven movement and noticeable jerks. The quality of the image depends on the frame rate - the higher it is, the better the effect.
To date, the question of which 3d glasses is better,remains open. Passive technologies are pleased with the low price, but they disappoint not too high quality. In active for a smooth picture you need a high resolution Full HD 1080p, which only recently owned only plasma panels. Another drawback of active glasses, in addition to their high price, is rapid eye fatigue and possible headaches. But as long as we argue which 3d glasses are better, 3D-TV technology without glasses is rapidly being developed, and soon this, to date, acute, issue will disappear by itself.