3D Glasses Related Questions

3D glasses allow their viewers to experience the illusion of three dimensions on a 3D video projector or a 3D television screen. These glasses create a perception of depth in an image. Passive polarized glasses and active shutter glasses are mainly the two types of 3D glasses and each type uses a different technology. They separate the images viewed by both eyes, which is then processed by the human brain and then converted into a 3D image. Below are frequent asked questions on issues relating to 3D Glasses that has been answered by the Experts.

I have a Panasonic TC-P55ST30 TV. What brands of 3D glasses would work with that TV?

To get the correct brand of 3D glasses for your Panasonic TV, you would want to visit http://shop.panasonic.com/shop/model/TC-P55ST30?t=accessories. This website would provide you with options on shutter 3D glasses that are compatible to work with Panasonic. However, it would always be a better idea if you could go through the various sizes of these glasses available on this website before purchasing one. For instance, if you could visit http://www.amazon.com/Panasonic-TY-EW3D3LU-Active-Shutter-Eyewear/dp/B0058SYDUW, you would be able to get the large size option of 3D glasses. You could take their model or the part numbers and check their prices on the website.

I own a Westinghouse TV with model number TX47F430S. The Direct TV is 3D. I can see

two pictures that are placed side by side on my TV screen. What 3D glasses would I

need to view the TV in 3D?


To begin with, your TV does not seem to be 3D capable. Moreover, the model number that you have provided is not going to work with the DirecTV 3D. Usually, when you purchase a new 3D TV, you receive a pair of 3D glasses along with the new set. Therefore, you would find that in many cases these glasses may not work best with brands other than their own. For example, if you have a Samsung 3D TV, you would see that it works best only with your Samsung 3D glasses. However, in this situation, the reason you thought your TV was 3D compatible is because your TV has a 3D comb filter. This filter is mainly used to control the picture noise on your TV and therefore has nothing to do with 3D viewing effect. Moreover, in this particular case, since a 3D image is being played over a non 3D screen, you kept viewing the two pictures side by side. Usually a 3D TV works by combining two separate images on the TV screen. These images take up the entire screen and become blurred. Now the 3D glasses merge these blurred images into a single 3D image.

Can I plug the 3D glasses directly into a TV port on my HD DLP TV to have them work

effectively or do I need a ‘Starter Package’ for this?

Normally, the 3D glasses consist of an emitter, which can be plugged into the four pin ‘Emitter’ port. You can locate that port on your TV’s back. However, if you purchase the 3D glasses kits from Mitsubishi, you would get the emitter and a control cable along with the kit that you can use to connect to your TV. You must also know that the 3D glasses that you receive in the kit are wireless. For more information on these glasses, you could click on http://www.4electronicwarehouse.com/products/mitsubishi/3dc-1000-3d-starter-pack.html.

I want battery operated 3D glasses for my Hitachi 1080p TV. Where can I buy that?


Hitachi does not provide battery operated 3D glasses to begin with. Therefore, you would need to buy a different TV in order to gain a 3D experience in this particular case. Some companies like Samsung, however, does manufacture these battery operated 3D glasses that are meant for the purpose of experimentation. They are manufactured only for some Samsung televisions that are sold with a particular type of Blu-Ray player. Therefore, if you want to experience a 3D viewing effect on your television set, what you would need to have is a new TV set that is 3D enabled. For that it is not at all necessary for the glasses to have power or batteries of any kind.

The concept of 3D is gaining popularity and is being used in movies, video games and televisions. However, it is important to ensure that the 3D glasses are positioned properly and all other equipments are working correctly, if you want to experience a good quality of 3D viewing. Or else, you may have problems like motion blur, brightness reduction, ghosting and so on while viewing the 3D images through these glasses. If you need clarification about your specific situation with respect to issues related to 3D Glasses, you may ask a TV Technician expert to evaluate your case details and provide a technical insight.

Seeing Triple: 3 Types of 3-D Glasses

Anaglyph glasses: Classic red and blue

The most common image of 3-D glasses is the iconic white cardboard frame with one blue lens and one red lens. These so-called anaglyph glasses have been widely used for well over half a century and have become the symbol of 3-D.

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Anaglyph glasses are a “passive” form of 3-D, meaning they just filter out certain things naturally. One image is projected on a screen with a blue tint, and the other is projected in red. The blue lens only lets the red image through, and the red lens only lets the blue image through, so each eye sees a slightly different image. It doesn’t have to be red and blue; there are many color combinations that work, but red/blue and red/green are most common.

There’s a problem though.

“Although [anaglyph] can create a good depth sensation, it very seriously compromises the quality of the perceived color,” said Dr. Jim Sheedy of the Pacific University College of Optometry.

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Those color problems are one of the main reasons that anaglyph 3-D content has been declining in recent years. The main benefit of anaglyph glasses over other technologies is their price. Anaglyph glasses are so cheap that they are usually just given away.


Polarized glasses: Not just a pair of sunglasses

The next type of passive 3-D glasses is polarized, and works similarly to anaglyph. Instead of using colored lenses, the lenses are polarized, meaning they only let certain wavelengths of light through. This gives them a tinted look that can make them easy to mistake for regular sunglasses at first glance.

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When light is polarized, the light waves all oscillate in one direction. By displaying one image that is polarized “up and down,” another image that is polarized “left and right” and having each lens only let one of the two types of light through, these glasses can achieve a 3-D effect.

“This can be very effective and does not have the color problems associated with anaglyph,” Sheedy said.

For this reason, polarized 3-D glasses are the technology of choice for most 3-D content in movie theaters. In addition, the glasses themselves are relatively cheap to make, too. While it’s common to have simple plastic frames, theaters can even mount the polarized lenses in cardboard frames just like anaglyph glasses. Nicer polarized glasses can run anywhere from just a few dollars to $20.

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Shutter glasses: The next generation

The most recent type of 3-D glasses, called shutter glasses, is also controversial for being the most expensive. Really expensive, in fact. Most TV manufacturers are selling shutter glasses for 3-D TVs at over $100 each.

Shutter glasses take more of a brute force-approach to create 3-D content. Instead of having two slightly different images displayed simultaneously and filtering one to each eye, like passive glasses do, shutter glasses make each lens go opaque and then transparent again in sync with the images displayed on the screen. When the screen displays the image for the left eye, the right lens will go dark so that only the left eye can see it. Then, when the image for the right eye is displayed, the left lens will darken and the right lens will become clear again.

These images flip back and forth faster than the human eye can perceive. It just seems as though you are watching a film through regular glasses, even though in a sense you are watching the movie one eye at a time. This is why shutter glasses are called an “active” 3-D technology.

There are several ways to make shutter glasses; the most common format right now is to use LCD technology that can make each lens go dark and clear very quickly. Unfortunately, it takes power to make this transition, which leads to another drawback of shutter glasses: They require batteries.

In order to sync the shutter for each eye with the proper image on the screen, shutter glasses usually employ a special infrared emitter placed on top of the TV and pointed at the viewers. The infrared signal tells the glasses when to darken each lens, keeping the glasses in sync with the show so that viewers get the proper 3-D effect. If the infrared emitter is obscured, the glasses won’t work properly.

So why are there so many different types of 3-D glasses? Why use anaglyph when polarized has less color distortion? And why have shutter glasses when passive glasses are so much cheaper? It turns out that it all depends on what medium the 3-D content is in.


3-D glasses for TVs

The main reason shutter glasses have been developed is for 3-D TVs. The other two main options, polarized and anaglyph, have major drawbacks.

“With current TV systems, it is not possible to show polarized images – they cannot be projected onto a screen as in movie theaters,” Sheedy pointed out.

That eliminates the polarized option. And while anaglyph technology works and has been used on TV for decades, the color distortion problem makes it a less desirable alternative. But there is a bigger reason to go with shutter glasses.

“[Shutter glasses] allow Sony to provide the very best possible 3-D picture quality – full HD 1080p.  Passive or polarized glasses only allow you to receive 720p or half-definition images,” said Greg Belloni, spokesman for Sony Electronics.

With high definition being the standard format for TV these days, shutter glasses were the obvious choice.

The main problem is that shutter glasses from one brand usually don’t work with a different brand of TV, so they can’t be used just anywhere. And even with the infrared emitters, the glasses can sometimes fall out of sync by milliseconds, which results in an effect called “flicker.” The glasses cause the image to appear to flicker, which ruins the viewing experience and possibly even the 3-D effect.

And then there’s no getting around the price. Belloni said that all 3-D glasses for Sony’s BRAVIA line of 3-D TVs will be priced at $150 each. Each TV comes with two pair of glasses, but if more than two people want to watch at once, you’ll have to crack open the wallet for more.

3-D glasses for movie theaters

All three technologies are usable in movie theaters because the image is projected onto a large screen instead of displayed on a glowing TV screen. However, it should come as no surprise that most theaters are going with polarized glasses. They avoid the color problems of anaglyph glasses and the high price of shutter glasses.


3-D glasses for home theaters

The home theater is still a gray area for 3-D glasses. If you use a TV, then the answer is the same as the one explained above. But some owners use a projector or DLP TV in their home theaters. This makes it possible to use the cheaper polarized glasses and forgo the shutter glasses.

It’s not so simple though. Polarized 3-D content requires two separate projectors or a projector that can display two images simultaneously. In the end, that might cost more than buying a few extra pairs of shutter glasses.

The other problem is getting content. Since most 3-D movies will be encoded for TVs, which use shutter glasses, there may not be as much content available for purchase in polarized formats. It remains to be seen if home projectors will comprise a large enough portion of the market to make a difference or if TVs will just be the standard display format.

3-D glasses for gaming

While most 3-D gaming monitors are quite expensive and require shutter glasses, some manufacturers such as NVIDIA and iZ3D are including an option in their hardware to encode 3-D-capable games in anaglyph. This provides a much cheaper option for gamers, but it only applies to PC gaming. Console gaming – on the Xbox or Playstation 3, for example – which usually relies on a TV for a display, will likely always rely on shutter glasses.

SainSonic Universal Clip-On Rechargeable Active 3D Glasses For

Panasonic, Sony, Samsung, Sharp TVs