The use of 3D glasses has always been thought to be the main barrier in the mainstream acceptance of tridimensional televisions.
Despite companies such as Samsung and Sony developing better 3D technology using more advanced glasses, other companies have opted to find ways to use 3D TVs without the use of glasses.
At the moment, there is a technology that relies on the use of webcams built into the TV sets which tracks the head and eye movement of the viewers and is able to adjust the image on the set accordingly. Another method of glasses-free technology is being developed by a certain Hungarian company.
iPoint 3D is currently working on, what it calls, the 3D TV Box which converts 3D video data into the correct signals needed by autostereoscopic displays to allow viewers to watch 3D without glasses.
This could potentially be a better method of delivering glasses-free 3D however at the moment all forms of specs-free technology are unable to deliver a picture that is as clear as 3D technology which requires the viewers to wear tridimensional eyewear.
The no-glasses 3D technology also ties viewers down to sitting at a specific height and position in order to see the tridimensional effect.
This is another aspect preventing the technology from becoming popular. Toshiba has a specs-free 3D TV on sale at the moment which uses a lenticular lens to produce different images that can be seen at different angles.
However, this option does not produce as much of an immersive experience that other 3D TVs that require glasses provide, added to that the price tag, and it is unsurprising that it has taken off.