3D Glasses.

[modeller]

I have watched 3D using glasses that cost £1 and £100 the latter requiring batteries . In both cases the 3D was OK so why the difference ?
The TV needing the £100 glasses was also double the price .

The cheaper one was LG which I'm told is Korean which may or may not be significant

[JonnyBoy12]

The ones in Cineworld are only worth 80p, but if you get them then keep them, as you can use them again.

[Buenchico]

Most of the major TV manufacturers have invested in the development of 'active shutter' 3D technology, which sends alternate signals to your left and right eyes. To ensure that each eye only sees the images which are intended for it, the glasses have to alternately 'open and close' the two lenses. That requires complex glasses, with batteries to power them.

LG has invested in 'passive' 3D technology, which saves money but at the cost of full HD resolution. The system puts two images onto the screen, with different polarization, with the glasses simply needing to contain lenses with oppositely polarised lenses. (It's essentially the same system that cinemas use).

Which system will win the battle is still debatable. Active shutter sets have got greater backing at the moment but some people can't get used to the 'flicker'. Passive 3D TVs are cheaper (as are the glasses) but full HD resolution can't really be obtained with such sets. Further, there's currently less backing from manufacturers for the system.

My own guess though, is that the passive system will win through simply because people will want all of the family to be able to watch 3D TV. (Active shutter systems are unsuitable for children under 7 years old, who could suffer problems with their optical development if they're subjected to the active shutter system).

For more, see here:
http://www.techradar....ctive-shutter--921432

Chris

[jacksprat16]

but if you go to cineworld to see another 3d movie you will get charged for another pair of specs,yet another money making scheme at the pics
you cant use your own from a previous visit
not at our cinema

[JonnyBoy12]

Well, you can at ours, jacksprat! We like to save resources (and money) where I live.

[modeller]

Thank for your answers which reminds me of another question.
I was told today that some TVs are able to turn 2D to 3D now what is that all about ?

[Buenchico]

See Q18 (and check out the link from there):
http://news.cnet.com/3d-tv-faq/#18

[modeller]

Thanks an excellent link .