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Author Topic: Are glasses-free 3D displays feasible?  (Read 2271 times)

Offline thedoc

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Are glasses-free 3D displays feasible?
« on: 21/03/2013 08:38:21 »
Engineers have come up with a way to deliver 3D images on mobiles, televisions and tablet computer screens without the need for tinted specs

Read the whole story on our website by clicking here

  
« Last Edit: 21/03/2013 08:38:21 by _system »


 

Offline graham.d

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Re: Are glasses-free 3D displays feasible?
« Reply #1 on: 21/03/2013 12:06:30 »
Comparison with "tinted" specs is a bit of a straw man comparison though. Cross-polaroid or, better, switched LCD glasses are the common way used on 3D TVs. However, it would certainly be better if the need for glasses could be eliminated. The method proposed is simple though I expect that the higher (64 position) system will be what will be necessary to gain market acceptance. It would be interested to see how effective it is. At present the extra realism you gain from having 3D is not great and, of course, for much programme material it is not adding anything useful at all. This system also would not get around the problem of the brain having to compensate for the parallax effect from the 3D not correlating with the focus of the eye. It gives some people a headache apparently. The only true way to do it is using holography but I think this is a long way off.
 

Offline evan_au

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Re: Are glasses-free 3D displays feasible?
« Reply #2 on: 22/03/2013 19:47:28 »
I have seen a demonstration of a 3D display that operated without glasses, using a lenticular lens over the flat screen.

You had to remain in one of a few optimum viewing zones - directly in front of the screen, or at a few specific angles on either side of the centerline. Other positions looked blurry, or confused your visual system.

This demonstration system never went into volume production, partly due to the lack of content in this format. and wearing 3D glasses gave a better 3D effect, once these systems became available to the public.

Perhaps this new glassless system might have more success for niche applications?

The standards for compressing and presenting video content have been updated to allow multiple viewpoints - but most content providers are just providing two viewpoints (left eye/right eye). Providing tens of viewpoints will demand much more communications bandwidth for mass-market applications.
 

Offline chris

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Re: Are glasses-free 3D displays feasible?
« Reply #3 on: 24/03/2013 23:06:30 »
You're right, the lens-based system offers a very restricted set of viewing positions. The improvement offered by this system is that the scale of the gratings is sufficiently tiny to mean that it's relatively easy to create a large number of such viewing positions, making it much harder to mis-position the head and therefore miss the effect.

I think the issue will be more what Professor Dodgson says, whether the public really want 3D displays. And to be honest, despite having a 3D button on my telly, the sexy looking 3D glasses pack that came with the screen remains barely used. Now that might be because donning the specs is a faff, or, more likely, that the benefit we achieve from said viewing experience is insufficiently large to make me (and the family) want to bother. Perhaps this new non-glasses system will change that?

Alternatively, I wonder whether - in the same way that a PDF of a research paper feels hard to read on-screen and is better printed out - we are just so habituated to seeing 2D on screens that 3D seems "weird" so we don't take to it?
 

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Re: Are glasses-free 3D displays feasible?
« Reply #3 on: 24/03/2013 23:06:30 »

 

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