3d effect without glasses

[senseless]

I was with friends at a casino this week and saw a 3d wheel of fortune slot machine that somehow projected a 3d image without the need for glasses. The effect was astounding and I couldn’t figure out how this worked. I know about the Nintendo 3ds, but this was really vivid and profound. Ever see this effect?

 

[BarracksSi]

First thing I thought of was Sega’s Time Traveler arcade machine.

Did you take a pic of the machine you saw?

http://gamesyouloved.com/game-genre/arcade/time-traveler/

 

[0388631]

I reckon a few shots of vodka would have the same effect.

 

[BarracksSi]

Is this it? Looks like it’s the same thing that the Nintendo 3DS had.

 

[senseless]

Is this it? Looks like it’s the same thing that the Nintendo 3DS had.

Yes, that's it. Obviously, the effect isn't captured on video. How does it work?

 

[BarracksSi]

Searched google (well, DuckDuckGo) for “how does the nintendo 3ds look3d?” and these came up:

https://www.tomsguide.com/us/Nintendo-3DS-3D-Glasses-DS,news-6237.html

https://www.cnet.com/news/how-good-is-the-3d-on-the-nintendo-3ds-and-how-does-it-work/

In a nutshell, the underlying technique is a little like those moving-image postcards you can buy. You know what I mean, where you tilt the picture and it seems to animate? All the animation frames are printed on the backing paper, but the lines on the plastic covering only let you see one “frame” at a time.

This time, for the Nintendo or for the video slot machine, there’s a diffraction grating — or “parallax barrier” — on top of the display, and it lets each of your eyes see only half the screen.

The image on the screen has both Left and Right perspectives. But instead of being projected as whole separate pictures (like an old-fashioned stereogram), they’re interlaced together.

Also from the DuckDuckGo search results:

 

[AlliFlowers]

There are a couple of slots that I play in Biloxi that have 3D. I love playing them just because of that. It makes for amazing bonuses, even if you don't win much.

 

[ActionableMango]

There was a new type of 3DTV on display at CES 2018. You didn't have to wear glasses, you didn't have to be in a sweet spot, and there was no crosstalk. And it doesn't use a lens to create separate left/right images for the left/right eyes, like existing glasses-free solutions use.

I've read about how it works and I admit that I still don't understand how it works.

 

[mobilehaathi]

There was a new type of 3DTV on display at CES 2018. You didn't have to wear glasses, you didn't have to be in a sweet spot, and there was no crosstalk. And it doesn't use a lens to create separate left/right images for the left/right eyes, like existing glasses-free solutions use.

I've read about how it works and I admit that I still don't understand how it works.

Can you link this explaination? The more technical the better.

 

[MacNut]

I don’t think this technique would work for a big movie screen. They can pull it off on a smaller screen like the 3DS and a slot machine.

 

[MC6800]

Can you link this explaination? The more technical the better.

I think that's Stream TV's Ultra-D. I can't make sense of it either.

 

[mobilehaathi]

I think that's Stream TV's Ultra-D. I can't make sense of it either.

That reads like someone trying to BS you while someone else picks your pockets.

 

[MC6800]

I'm guessing that Ultra-D is using the same principle as the ribbed-lens pictures based on parallax, but with the lenses aligned to the LCD's sub pixels in such a way that the sweet spots from different sets are distributed evenly across the viewing angle. It would sacrifice brightness/contrast for this.

 

[ActionableMango]

That reads like someone trying to BS you while someone else picks your pockets.

This is the article I read. The author saw their demo at CES and seems to indicate that it works well. I trust AVSFORUM, so I don't think it is a fly-by-night scam or anything like that.

http://www.avsforum.com/stream-tv-glasses-free-3d-ces-2018/