If we want to talk about 3D , we need to talk about the type of 3D glasses and flat panel TV that is being use. There are two distinctive type of screen the active and the passive. Which one is the best and how they relate to the 3D glasses? Is what I would like to help you figure out.
Let's start by saying that there is a lot of flat panel technology today that do 3D. There is plasma and LCD, and there is a Large and good selection of each. Until not that long ago the majority of all flat panel displays have had what is known as active 3D. In other words, you need to have the active Shuttered glasses to be able to perceive the 3D image.
There used to be certain disadvantage for the use of active shuttered glasses they were battery powered that meant that you'd have to change the battery, originally there was also a consideration that active glasses were heavier. However, this is not a problem anymore the current active glasses are really lightweight.
There is also the fact that they are shuttering and that some people perceive a Flicker when they watch through active glasses, just like in the old day of CRT TV set. And ... they are expensive. Today the weight problem has been solved, and the battery charge problem has been improved, but the glasses are still expensive, and you still need to change or recharge (with some model) the battery, even if like we said before the duration of the charge as been improved.
With the active LCD technology the images are presented sequentially first the left eye image and then the right eye image, in other words when the left eye is up the right eye is blocked, and when the right eye is up the left eye is blocked. The higher the refresh rate is. The less chance that you will encounter the flicker problem. With the LCD type you should look at least for a 240 hz display. The plasma technology can go up to 600 hz.
In the meantime in order to be able to use the passive type of 3D glasses like the one used in the theater, several flat panel LCD manufacturer have introduce something they call FPR film pattern retarder. Basically what they do, is that they put a film over the surface of the LCD panel and in this film we have one line that is polarized this way, and the next line that is polarized the other way so we end up with horizontal line of polarizer, that theoretically match up with every single line that is in the Picture. Of course, the problem is that the filter is forward off the actual line that is in the picture. And that could be a problem if you are Looking from a low angle or looking down from a high angle because then the line of the filter don’t exactly match the line that are in the display. for this technology to work perfectly you have to be right in front the TV and that is too bad for all the other that are watching it with you. the problem as been compensate by tilting slightly the line at the top and at the bottom of the filter so that when you are looking down or up at the picture you don’t see too much distortion.
The passive 3D capable flat panel produce two 1080P image a left eye image and a right eye image both image are shown at the same time. In order to be able to put two 1080P image on the screen at the same time you have to take half the line of each image. The left image is presented with 540 line that might go in the odd line of the TV set, the right image is presented in the 540 line remaining. So what this does is presenting a half resolution to each eye. This is where the controversy about the resolution comes in. The manufacturer of these display are saying that if you have two half images they blend. They are also making claims that the left eye and the right eye see's the two 540 line image as one 1080P.
Different Test that have been done leads to the conclusion that what we are seeing is a half resolution image. In fact it appears that if the left eye and the right eye added the two images together you would never see the 3D effect. If the brain cannot distinguish, a difference between the left and right eye there is no 3D.
here's a example of a simple test that as been done. If we put on a pair of anaglyph glasses the one with the red and cyan lens, and if our eyes where adding the two images together. The color we should see is grey, the resulting color of red and cyan.
If you do not have a pair of anaglyph glasses then I’ll tell you that what you see is red and cyan and not grey. That instantly tell us that the brain recognise the difference between the left eye and right eye. So with the polarize passive glasses watching a FPR display the left eye see’s a 540 line resolution image and the right eye see’s a 540 resolution image that is a little bit different from the left one so that our brain can detect the difference and calculate the depth. The single 3 D image that you see from the two 2 d images that make that up, is much more of the brain understanding the difference between the two rather than the some of the two. What comes out of these explanations is that this type of display with the film pattern retarder technology only give’s half resolution. There is also another consideration with this type of display. Because of the film pattern retarder the regular 2D image are not as good as on a regular 2D flat TV. And that in my opinion is a bigger problem then the half resolution of 3D, since most of what you will watch on your TV is from a 2D source. But that said the advantage of being able to use the inexpensive polarize 3D glasses to watch 3D is extremely interesting and i think you should look into it before buying. The resolution problem with the passive tech seems to be less of an issue with the smaller size display the one below 50 inch. and that is because the 1080 line are more compress on a smaller screen.
New 3D technology
There is a new technology from Samsung that might ultimately set a new standard for 3D display. It is called RDZ 3D and it is using the best of both technology to render a full resolution 3D image, using the cheap and easy to use passive polarize glasses. What as been done is to make the flat panel display itself active. In our opinion this is a brilliant solution. At this moment, in early 2012, this new technology is not yet available and we don’t know how much it will cost. But if it is as good as it sound I think you should wait a bit to see what will come out of it before buying any of the two current type of 3D flat panel display.