The popular method of creating a 3D image on a TV these days is to rapidly show two slightly different images one after the other. Each eye is shown only one image each with active shutter glasses that block and unblock the view of each eye so the correct image is shown to the correct peep hole. As each eye sees the world from a slightly different perspective this effectively fools the brain into thinking that it is seeing an image with some depth.
The problem with the active shutter glasses is that they are expensive. People also have different shaped faces and like to buy glasses that suit. When you buy these glasses you are kind of stuck with the one style. If they happen to not fit correctly then you have to deal with expensive and uncomfortable glasses. You will also need a TV capable of the high refresh rates that 3D requires. So if your current TV is more than a few years old it's likely that you will need to purchase another newer model that is 3D ready. Now that you have the TV you then need to invest in some glasses. Most TV brands have their own specific models of active shutter glasses. Unfortunately most families have at least 3 members. With my family I need to buy 6 pairs. Basically I'm investing almost the same amount of money spent on the TV on the shutter glasses just so we can all watch movies at the same time.
Luckily technology never stays still and we are already seeing new TVs available which can possibly eliminate the extra expense of glasses. New technology always costs more but TVs are becoming available that use polarized light to display the images. This is the same technique used in the movie theaters but on a smaller scale. Two projectors are used in the movie theaters which project two seperate images onto the screen at the same time with polarized light. Each lens on the polarized glasses will only let one image through while blocking the other. As a result each eye sees a separate and slightly different picture than the other. As both images are shown at the same time the refresh and scan rates of TVs is not as crucial.
For mostly solo viewing you can purchase LCD screens for 3D viewing without glasses. Through clever and secret use of technology the LCD screen is capable of displaying the two different images in such a way that each eye only sees its correspondingly correct image and all without glasses. Due to the nature of the way this works it currently cannot be done for a large audience or a widely dispersed one as in a movie theater. Each viewer has to be in the correct spot in order for each eye to get its correct image. Any viewer outside of the sweet spot will only a see a 2D image at best or a blurry mess at worst.
Consequently it may be a while before we see this glasses free 3D technology in large TVs and projectors but it is available in the new Nintendo 3DS game system. It works for the 3DS because the unit is usually only catering to an audience of one whose view is more than likely going to be in the required sweet spot.
The problem with the active shutter glasses is that they are expensive. People also have different shaped faces and like to buy glasses that suit. When you buy these glasses you are kind of stuck with the one style. If they happen to not fit correctly then you have to deal with expensive and uncomfortable glasses. You will also need a TV capable of the high refresh rates that 3D requires. So if your current TV is more than a few years old it's likely that you will need to purchase another newer model that is 3D ready. Now that you have the TV you then need to invest in some glasses. Most TV brands have their own specific models of active shutter glasses. Unfortunately most families have at least 3 members. With my family I need to buy 6 pairs. Basically I'm investing almost the same amount of money spent on the TV on the shutter glasses just so we can all watch movies at the same time.
Luckily technology never stays still and we are already seeing new TVs available which can possibly eliminate the extra expense of glasses. New technology always costs more but TVs are becoming available that use polarized light to display the images. This is the same technique used in the movie theaters but on a smaller scale. Two projectors are used in the movie theaters which project two seperate images onto the screen at the same time with polarized light. Each lens on the polarized glasses will only let one image through while blocking the other. As a result each eye sees a separate and slightly different picture than the other. As both images are shown at the same time the refresh and scan rates of TVs is not as crucial.
For mostly solo viewing you can purchase LCD screens for 3D viewing without glasses. Through clever and secret use of technology the LCD screen is capable of displaying the two different images in such a way that each eye only sees its correspondingly correct image and all without glasses. Due to the nature of the way this works it currently cannot be done for a large audience or a widely dispersed one as in a movie theater. Each viewer has to be in the correct spot in order for each eye to get its correct image. Any viewer outside of the sweet spot will only a see a 2D image at best or a blurry mess at worst.
Consequently it may be a while before we see this glasses free 3D technology in large TVs and projectors but it is available in the new Nintendo 3DS game system. It works for the 3DS because the unit is usually only catering to an audience of one whose view is more than likely going to be in the required sweet spot.
About the Author:
This article has been written by the author, Alex Blaken. Should you require any more 3D Image please visit his 3D Viweing resources!
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