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Parallax barrier 3D TVs work by using tiny lenses which are integrated into the TV screen - layered liquid crystal displays. Each layer contains small stripes that hide specific pixels so that some can only be seen by your left eye, while other pixels can only be seen by your right. The result is the two images our eyes need to see to send a 3D image to our brains. With the lenses being built into the screen, there's no longer a need for 3D glasses. The biggest drawback is that parallax barrier only works if the viewer remains in the same spot, hence the reason why the early Toshiba sets are on the small side. Screen brightness is also a possible problem.
Another method of delivering no glasses 3D TV is by the use of lenticular lenses , which are shaped and designed so that a different image is displayed to each eye depending on the viewing angle. This is achieved by building small lenses on to the display screen and then refracting the left and right images that are emitted. This gives slightly less reduction in brightness than parallax barrier displays and a wider range of viewing angles.
Head tracking works by using a webcam that locks on to a viewers eyes and adjusts the images sent from the display as the viewer moves so they see in 3D. Clearly this only works for one viewer at a time and seems best employed with small screen devices such as mobile 3D TVs or laptops. In fact a Toshiba 3D laptop has already been demonstrated using this technology.
The 3D TV Box is another recent development in 3D TV without glasses technology. The Hungarian company have demonstrated a Tridelity 65 inch LCD 3D autostereoscopic 3D combined with the prototype version of the Box. The technology works by taking a standard 3D image and transmitting it to the Box to be displayed. The 3D TV Box takes the image and projects it on to the TV display at the same depth you see when using 3D glasses on most 3D sets, and can take content from Internet, satellite, cable or any other services that currently offer streaming 3D content solutions.
There were some limits in viewing angles, which is to be expected, but in general the technology offers no worse results than any others seen so far and in fact does offer an improvement in quality to the extent that the depth of imaging at least equalled that achieved with glasses. There was an added bonus achieved in brightness because lasses are not being used.
For parallax barrier viewing to work, one of the drawbacks is that the angle from which you watch the screen and your distance from the screen can be critical. So, to get a full and high quality effect you need to be sitting directly and squarely in front of the TV at the optimum viewing distance.
This is a difficult one to answer at this point. The 3D TV manufacturers are still working on perfecting the method, though it's likely to be some time before the technology is advanced enough to create massed numbers at an affordable price.The first no glasses sets are also on the small side, though advance reports from the Consumer Electronics Show 2011 suggest a number of the manufacturers have prototype models under development. Sony in particular plan to show glasses free 3D TVs in both LCD and light emitting diode models.
One thing is for sure, the current boom in the interest in 3D TV in general is already fuelling the need to develop no glasses 3D TV. If the major manufacturers want to hold an advantage over their competitors, it'll be critical for them to be looking at the best ways to deliver.
With the arrival of the first commercially available Toshiba sets, the precedent is already set for the development of bigger screen 3D TVs which use parallax barrier or lenticular lenses. Major manufacturers are already displaying prototype larger screen models. If they can deliver these commercially at a reasonable price, and with the same quality that you get from TVs that require active shutter glasses, then the predicted explosion in the acceptance and uptake of 3D viewing, whether for TV or for 3D games, may well be guaranteed.
There are a couple of other developments to be aware of. One is the potential of sets that contain tiny cameras which track the viewers position. These would adjust the emitted images so that the viewer is always in a sweet spot, relieving the need for keeping in a specific position or at a certain distance when watching. In fact, one of the latest prototype 3D laptops from Toshiba already uses this technology by use of a built in webcam which locks on to your eyes when you approach the screen. Further development is needed as at this stage it does not deliver the same quality as you get with active or passive 3D glasses.
Further future potential lies in holographic technology which of course begins to take us away from viewing images on a screen and starts to focus on the objects viewed, bringing us into the realms of science fiction - the real thing played out right in front of you. This is a little further away!
Another method of delivering no glasses 3D TV is by the use of lenticular lenses , which are shaped and designed so that a different image is displayed to each eye depending on the viewing angle. This is achieved by building small lenses on to the display screen and then refracting the left and right images that are emitted. This gives slightly less reduction in brightness than parallax barrier displays and a wider range of viewing angles.
Head tracking works by using a webcam that locks on to a viewers eyes and adjusts the images sent from the display as the viewer moves so they see in 3D. Clearly this only works for one viewer at a time and seems best employed with small screen devices such as mobile 3D TVs or laptops. In fact a Toshiba 3D laptop has already been demonstrated using this technology.
The 3D TV Box is another recent development in 3D TV without glasses technology. The Hungarian company have demonstrated a Tridelity 65 inch LCD 3D autostereoscopic 3D combined with the prototype version of the Box. The technology works by taking a standard 3D image and transmitting it to the Box to be displayed. The 3D TV Box takes the image and projects it on to the TV display at the same depth you see when using 3D glasses on most 3D sets, and can take content from Internet, satellite, cable or any other services that currently offer streaming 3D content solutions.
There were some limits in viewing angles, which is to be expected, but in general the technology offers no worse results than any others seen so far and in fact does offer an improvement in quality to the extent that the depth of imaging at least equalled that achieved with glasses. There was an added bonus achieved in brightness because lasses are not being used.
For parallax barrier viewing to work, one of the drawbacks is that the angle from which you watch the screen and your distance from the screen can be critical. So, to get a full and high quality effect you need to be sitting directly and squarely in front of the TV at the optimum viewing distance.
This is a difficult one to answer at this point. The 3D TV manufacturers are still working on perfecting the method, though it's likely to be some time before the technology is advanced enough to create massed numbers at an affordable price.The first no glasses sets are also on the small side, though advance reports from the Consumer Electronics Show 2011 suggest a number of the manufacturers have prototype models under development. Sony in particular plan to show glasses free 3D TVs in both LCD and light emitting diode models.
One thing is for sure, the current boom in the interest in 3D TV in general is already fuelling the need to develop no glasses 3D TV. If the major manufacturers want to hold an advantage over their competitors, it'll be critical for them to be looking at the best ways to deliver.
With the arrival of the first commercially available Toshiba sets, the precedent is already set for the development of bigger screen 3D TVs which use parallax barrier or lenticular lenses. Major manufacturers are already displaying prototype larger screen models. If they can deliver these commercially at a reasonable price, and with the same quality that you get from TVs that require active shutter glasses, then the predicted explosion in the acceptance and uptake of 3D viewing, whether for TV or for 3D games, may well be guaranteed.
There are a couple of other developments to be aware of. One is the potential of sets that contain tiny cameras which track the viewers position. These would adjust the emitted images so that the viewer is always in a sweet spot, relieving the need for keeping in a specific position or at a certain distance when watching. In fact, one of the latest prototype 3D laptops from Toshiba already uses this technology by use of a built in webcam which locks on to your eyes when you approach the screen. Further development is needed as at this stage it does not deliver the same quality as you get with active or passive 3D glasses.
Further future potential lies in holographic technology which of course begins to take us away from viewing images on a screen and starts to focus on the objects viewed, bringing us into the realms of science fiction - the real thing played out right in front of you. This is a little further away!
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