How to choose 3D-glasses

How to choose 3D-glasses

3D-boom that occurred a few years ago, recently gradually faded away, but he did his job – the quantity and quality of three-dimensional releases on Blu-ray has increased markedly, though not as much as analysts had forecast, inspired by the phenomenal success of “Avatar “and I think that a couple of years, every second home viewer will watch a movie in 3D-glasses.

Nevertheless, even the optimists and not “guess”, but skeptics who called home 3D bubble that is about to burst, too, were not quite right – its audience in this format appeared, albeit relatively small. And if there is demand – will offer, so almost all modern TVs support the playback of 3D, as can be found in the sale of nearly a hundred different models of 3D-glasses. What should be guided by the same criteria when buying?

Just note that choose 3D-glasses need … even at the stage of buying a new TV. Universal models suitable for TVs of different manufacturers exist in nature, but they are few, besides, they are generally inferior in quality brand model. Therefore, if you are planning to buy a new TV that supports 3D, and it is for you one of the key moments, think about it in advance over what glasses you need.

All modern 3D-glasses for home theater are divided into two categories – polarizing (passive) and LCD shutter (active).

How to choose 3D-glasses

There are, however, still 3D-glasses with LCD displays, but in fact it is a completely separate category of devices that do not have any relation to conventional television 3D-glasses – they do not require the presence of the TV, because the image is displayed on the LCD screens installed in such glasses instead of the usual glass.

Glasses with LCD shutter are sufficiently complex system, in which instead of glass lenses are LCD screens.On the TV, then alternate between the frames for the left, then the right eye and the glasses sync with the “close” then the right, then the left LCD screen, making it opaque – in the end, the viewer sees the film, figuratively speaking, “through the frame”, then one eye, then the other. The disadvantage of this technology is as easy to guess, noticeable flicker pictures – TV in 3D mode updates the image with a frequency of 120 Hz, so that each eye there are only 60 Hz. This is enough to create a sense of smooth animation, but not enough to catch the human eye no longer flicker. It should be noted, however, that it is especially noticeable in the first few minutes of watching a movie on the brain adapts and the viewer almost feels discomfort … but relatively quickly eyes begin to tire. Here, everything much depends on the individual, but, in practice, without any consequences to sit full movie without interruption can usually few – while comfortable viewing 3D-cinema is usually less than an hour.

Polarized glasses operate on a different principle, similar to that used in the glasses in movie theaters, for example, IMAX 3D: on the screen simultaneously displays two images (left and right eyes), and installed in glasses polarizing filters allow only that part of the image, which is designed for each eye. The main advantage over the active points is, of course, no flicker, and hence tiring easy eyes. Disadvantages, however, also includes – TV, in contrast to the cinema screen, can not simultaneously display two full-screen image (in the theater is usually achieved by using two projectors). So television with polarizing glasses show a mixed picture, where the images for the left and right eyes are in a line – in other words, the viewer displays two half frames in interlaced mode. As a result, the resulting image after the “filtering” polarizing glasses is less precise than using active glasses, plus in certain situations, a viewer may notice black lines left after the “subtraction” of the image for the other eye. Indirect result, in this case, is slightly less pronounced depth of a three-dimensional scene. However, again, is a three-dimensional image does not flicker, so that eye fatigue during prolonged viewing does not threaten you – it is, in particular, makes the polarized glasses the best choice if the 3D-TV is purchased with a view to showing the three-dimensional cartoon children.

As a rule, polarized glasses used with TVs LG, Philips, and glasses with LCD shutter – with models Samsung, Sony, Panasonic, Sharp (this is due to the matrix used in TVs). But there are exceptions – for example, in the latest Sony and Panasonic (Model 2013, for example, Panasonic TX-LR42FT60 ) used polarization technology.

After selecting the manufacturer of the TV special “room for maneuver,” the user does not remain, especially in the case of polarized sunglasses. They usually go into a TV set, and in sufficient quantity (two, and even four pairs). In this particular diversity among the available models is observed – they are all the lightest and airy, with an “open” rim, and outwardly resemble sunglasses with a slightly old-fashioned design. Yes, and with a wealth of choice of all good only in LG, which offers nearly a dozen different models – the other manufacturers are limited to one or two.

In the case of glasses with LCD shutter, situation is markedly different. Firstly, because of the higher cost producers rarely put these glasses in the box to the TV. At best, it will show a maximum of two pairs (and then only in conjunction with a fairly expensive TV), and the user will have to attend to purchase additional points. Second, the points with LCD shutter offers much more (in the catalog Hotline is present in almost fifty items from different manufacturers). And third, they are divided into two different categories – from “open” rim and “closed”. First, as a rule, do not differ much in appearance and weight of the polarizing glasses, while the second is much heavier and heavier, and look like a “classical» 3D-glasses in the conventional sense. At first glance, easy points clearly preferable, but there are some nuances. Yes, with a closed rim glasses heavier and the ability to quickly rub nose, but due to the overlap of peripheral vision, they contribute to a total immersion in the viewer’s happening on the screen, and purely subjective image of glasses seems to much more voluminous than in the “open”. Note here that the “open” form of points does not mean that they are likely to be comfortable – yes, they will be less pressure on the nose, but because of the design features of the temples are quite capable to cause discomfort in the ears. Given that some manufacturers for the same TV model can be accessed different types of points (for example, “open” Sony TDG-BT500A and “closed” Sony TDG-BR250B ), it is strongly recommended before buying read reviews of the owners on the discussion forums – As a rule, they all relate to it ergonomics.

How to choose 3D-glasses

Another point that is unlikely to affect the choice of a particular model, but which, nevertheless, you should know: Unlike polarizing glasses, active shutter glasses with LCD shutter works on batteries, and there may be two options – or it can be charged via USB battery or a lithium batareyka- “tablet”. In the second case, the work is much longer (up to 100 hours against 10-30 at points on the battery), but the user will be forced periodically to spend money on new batteries.

And finally – almost all 3D-glasses can be worn over normal glasses, but in reality, this “design” is not the most comfortable. And, characteristically, the degree of discomfort is practically independent of the type of 3D-glasses – and massive closed rim and light with an open are almost equally uncomfortable, they should fasten on top of the ordinary. Therefore, we would advise at least for the duration of the session 3D-glasses to replace conventional contact lenses – or do you have to do more frequent breaks while watching to rest on two pairs of glasses.

Results

As you can see, nothing complicated in the choice of 3D-glasses do not have – most importantly, that there should know that define the basic things, it is desirable at the stage of buying a TV that is not subsequently regret the thoughtless choice.

How to choose 3D-glasses updated: March 13, 2015 author: John Malkovich