You may not be aware that the 3D TV technology in the current form won’t cover the entire population. 4% to 10% of the population will not see any 3D effect while watching 3D TV. Current 3DTV technology is based on the fact that while looking at any object your right eye and left eye give a little different image (at different angle) and this difference (binocular vision) is interpreted by brain for perceiving the depth of the object. It is also known as stereopsis. Is it true? Then what happens when you shut one of your eye and look at the same object. Do you see a 2D or 3Dimage? Most of you still perceive the depth which indicates that it is not just two images formed by right or left eye but your brain is trained to see it as a 3D object. Somebody born with vision in one eye only may not visualize depth at all, I think so. Moreover 4 to 10% of the population won’t see 3D with the two slightly different images formed by left and right eyes. Their eyeball curvature changes to arrive at a focal point where they are able to visualize the depth (crap!) / some similar phenomena. They are called “3D blind”. Current 3D TV technology will not help “3D blind” people since it is based on theory of binocular vision/ stereopsis.
So there three types of people as far as 3D Technology is concerned..
1. You area able to view 3D effect: Lucky Guys 🙂
2. You are able to see the 3D effect but it has unacceptable side-effects such as headaches and nausea.
3. You are unable to see 3D effect. Unlucky guys 😦
If you are able to see the 3D effect but it causes you discomfort, you may have a mild binocular disorder. See a good Ophthalmologist.
NVIDIA has given a 3D Blind test in their site. There is a very simple test to find out . http://www.mediacollege.com/3d/depth-perception/test.html
If you belong to the first category read on. If you happens to be in the other two category, wait for 3D TV technology to mature. Meanwhile you can visit http://www.fixingmygaze.com
There are basically 3 type of 3D TV technology.
1. Polarization 3D Using Passive glasses (Using Polarized glasses, like the way you watched Avatar Movie in theatre)
2. Alternate frame sequencing: Active Shutter Glasses: This is the most common 3D TV technology currently used by Samsung and Sony
3. Lenticular viewing: (Autostreoscopy) This does not need a glass, currently marketed by Philips but suffers narrow viewing angle. This is mainly targeted for professional market and is costly.
We will discuss in detail the Active glass technology which is employed in both Samsung (7000 and 8000 series) and Sony (HX900/ LX900) TVs.
These TVs use high frame rates, minimum 120Hz, 240Hz is the norm. In this right and left image is shown alternatively in a sequence and your shutter glass is synchronized with TV to block and allow the respective images meant for right and left eyes. IR or Bluetooth wireless is used between the TV set and the glass for synchronization. There is an issue here where each frame is holding more than 16ms in LCD (unlike in CRT where it fades away fast). So your brain start seeing left and right frame leaking to other frame / eye (L) which in turn confuse it and manifest it as headache after prolonged view. So Samsung tries to solve this leakage by introducing blank frames in between , so 240/2 = 120 Hz for a complete frame (both left and right frame) and 120/2 = 60Hz effectively because of these blank framesL Now you start thinking 240Hz is not enough J. Sony does not insert blank frames for their HX900 series and a set of people start complaining about headaches L So it is better to watch some 3D movies for long time in these a 3DTV before deciding to put money on that. Sony LX900 3DTV is available for demo from tomorrow onwards at Forum mall. Active 3D glasses are costly too! How do you see 2D movies in 3D? More later………
Lenticular viewing: This technology has been pioneered by Philips, and is available as of today. TV sets that use this technology can be watched without those funny glasses that audiences used in theaters. These televisions use a lens that can send different images to each eye. That is, your left eye will see a completely different image from your right eye, which will emulate your two eyes’ use of stereopsis (the process by which your eyes discern depth). The one weakness of lenticular viewing, however, is that a viewer must sit in a very specific spot in front of the TV. This means that only a couple people would be able to comfortably watch the TV at once due to its small viewing angle.
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