Difference between Active and Passive 3D Glasses

Wednesday, May 25, 2011

The need to wear 3D glasses to play 3D games and watch movies in 3D content such as3D TV and 3D Blu Ray is one of the most debated topics in the television producer in 3D, and between buyers of 3D TV.


Until the arrival of good quality, low-cost 3D TV without glasses that requirement to wear 3D glasses is likely to continue to shape the widespread acceptance of 3D television as a medium of entertainment at home.

Fortunately, major manufacturers are aware of the limitations and problems that require 3D glasses. This is a problem not only in terms of costs (although the last passive glasses are much cheaper than the models widely used Active Shutter), but many couples often often work with TV producers, which were designed for, it means that t can ' bear to watch television differently. In addition, most of the 3D TV is provided with one or two couples. You will need to buy several pairs for family or friends. The purchase of a 3D starter kit - which gives additional pairs available - is a way to overcome this problem.

Since Avatar, Clash of the Titans, and Alice in Wonderland illustrated our appetite for companies tariff 3D electronics have always wanted to try out our homes. But 3D is not a new invention. In fact, there are nearly a century. The first 3-D glasses and the film appeared in 1922, and the technology has continued in the 80 and the viewing public has lost interest.

In recent years the development of 3D technology of television has changed. For those who want to know how 3D TV, 3D glasses understanding of the game is essential, especially for those who want to buy a 3D TV at the moment. With the increasing availability of 3D content for television broadcasters and television in 3D they wear, the stage seems set for an acceleration of growth in the adoption of 3D TV in our homes. The debate on whether the 3D glasses will have a negative impact on growth prospects continue to rage for some time.

In this article we will see why we need to wear 3D glasses, what kind of 3D glasses are several types of 3D glasses - active and passive liquid crystal glasses - and the technology behind them.

So why do we need to wear special glasses to watch 3D content? The answer lies in how our brain interprets the images received from our eyes. For this, we must understand the parallax and how it works.

The best stereo images to provide different images for each of our eyes, and the best way to get that when viewing a flat image is to wear glasses with lenses that provide slightly different versions of the image plane in each eye.

Humans naturally see in three dimensions because of parallax, which is the line of sight overlap that occurs when you use two eyes to see an object. Since our eyes are several inches apart, each eye sees an object with a slightly different angle. This slight difference is what causes the "perception of depth and experience to see in three dimensions. This is called stereoscopic images.

When the movie came out, there was no evidence of parallax and finding more effective ways to manage the "chances of admission. Initially, the images were produced using 3D anaglyph images, created by superimposing the image on a red-blue with a view slightly different. cardboard 3D glasses are needed with the red and blue glasses to see the action jump off the screen.

Our eyes see combinations of the three primary colors: red, blue and yellow. anaglyph 3D glasses, just use a lens with a different color for each eye. anaglyph glasses combined with a main objective of color (like red) mixed with a colored glass in blue (a mixture of green and blue). This has created 3D images, blocking parts of the spectrum of color in one eye, and different parts of the color spectrum in the eyes of others. The difference between the two was enough for each eye sees a slightly different image of the cinema while watching the screen, causing the brain to treat the scene like in three dimensions.

The process has allowed for 3D visualization, but it caused an incredible color distortion. A change was made for polarized anaglyph - pictures with different light levels, rather than the colors - but it was too late. The audience has changed. Recently, however, the desire for 3D content was awakened by forcing new developments in polarized lenses. Avatar has shown that 3D should not be a gadget. It can be an art form. The glass used in the room are known as passive glasses, cheap and very effective in a theatrical setting.

Passive 3-D glasses at home - to tell the difference between passive and active LCD glasses
 
The main difference between the two types of glasses, is that while creating passive 3D glasses by sending information to each eye of our eyes so, active glasses do so by sending information to both eyes simultaneously.

Passive glasses are similar to those you get when you watch a 3D movie at the cinema. They are polarized lenses that separate the images you see, and leave just the right image for the left eye and right eye to be viewed correctly. A major advantage is the cost of passive glasses, with a couple potentially a cost of about a pound or two dollars. In addition to this there is no electricity, so no batteries to replace.

The problem with polarized anaglyph glasses is that they require darkness to work at their maximum. It 'difficult to create and maintain the darkness of a theater in a living room, so that companies had to find a way to produce 3D images without interfering with the light levels of an image.

The latest developments in passive glasses has been the arrival of the RPF or Patterned Retarder film technology. This is now supported by the likes of LG, Toshiba and Philips, and works to optimize the separation of images for our eyes to the right and left, then merge through passive 3D glasses to provide the 3D image.

This creates 3D images of superior quality with reduced crosstalk or ghost, a problem that can cause blurred images. The new LG TVs use a thin film that covers the 3D display that helps to combat the problem of the light level previously seen with passive glasses, and results in brighter images for 3D visualization of the 3D experience of good quality.

Vizio was the first manufacturer to introduce this technology 3D passive at the end of 2010 with the release of their XVT3D650SV 65-inch model - an expensive purchase, now at about $ 3700. Initial tests showed a difference in image quality compared to an active set of glasses Panasonic popular, best-photo released by Panasonic.

3D LCD Active Shutter Glasses



Originally developed for the game screens and displays, 3D glasses are now under development used to watch TV in high-definition 3D. This format shooting active glasses clear, high quality, high-resolution images. Glasses work on the same principle, such as cups and glasses polarized red and blue or passive, leaving the image of each eye.

Instead of playing with colors and light levels, however, safety glasses or close any lens that darken over time with a refresh rate of a television set at a speed of about 120 times per second, a technique known as the alternative image the sequence. This allows an image to enter the left eye, while the dark right lens, and vice versa. He arrives at high speed, controlled by a transmitter built into the TV, there is a lack of electricity, but we can see three dimensions. This process makes them much more expensive than passive 3D glasses, because they are controlled electronically and they also need batteries to function.

Samsung has a lot of glasses that comes with the 3D TV and 3D DVD players in 2010. All the batteries needed to power the goals flap, but the SSG-2200AR is the only rechargeable model. The model of SSF-2100AB, which uses disposable batteries, will be available shortly. Both models will be available in certain pairs of glasses, which runs between $ 150 and $200 each. For consumers who need more than one pair of 3D glasses, 3D Samsung will also offer a starter kit, which includes two pairs of glasses, which SSG-P2100.

For consumers who can not give $150 for a single pair of glasses, ViewSonic offers a cheaper alternative: PGD-150 lenses for only $ 89. These 3D glasses can be used with other 3D-capable and have an effective range of vision at 50 feet. IO Display is the leap into 3D. The company publishes its Virtual FX 2D to 3D converter, with two sets of glasses.

There have been some health warnings issued to 3D TV, particularly around health concerns with glasses, though. Extended viewing through the lens can cause disorientation and headaches. Wearing glasses for long periods of time - like days at a time - could also cause potential damage to the eye.

Active glasses may seem a little piece of technology complicated, but they work very easily. Some companies may say the glasses must be synchronized on TV, and offer to do it for you for a nominal fee. But you can synchronize your glasses to TV at home, for free. Just wear them and look at the screen.

Incompatibility problems - and a possible solution ....

Incompatibility between the 3D glasses for different groups of producers has always been an obstacle for 3D television. Thus, the recent Panasonic to create a single standard for the models of active shooting tends to be a promising step in the right direction. Xpand3D have worked to create a standard known as M-3DI, which aims to ensure compatibility of the lenses used with all different types of 3D display - TVs, PCs, laptops and projectors.

The standard has the support of a number of major manufacturers such as Mitsubishi, Hitachi, Panasonic, of course, and a handful of others. E 'provided that the new technology will be seen first in Australia in the second half of 2011, Panasonic will release a new plasma high-end 3D TV series and works by using two-way technology that, once a set of 3D glasses activities, that recognize the brand and model of your TV watching.