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3D LCD Screen

Using multiple LCD panels to create a 3D effect
 
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Once again, I'm not claiming to be any kind of expert in any field, just havin a though that might spark some interesting ideas from y'all. Here we go... Now, as I understand it, an LCD display works but applying an electrical charge to each pixel of the screen to excite the liquid crystal to allow it to pass light through. Ok, If I am correct in this, could we not place multiple panels one behind the other in front of the light? (LCD - LCD - Backlight) I will use a single pixel example. The front LCD screen pixel would allow all light to shine through it (white pixel) while the pixel directly beind it on the next LCD panel would have the color of what is to be shown on the screen. We could do this using multiple layers of LCD panels. Because of the distance (a few milimeters) between each panel it could create a real 3-Dimensional effect. With the right configuration and software we could create images that would use the different LCD panel levels for each pixel which would create this multi-dimensional image. I'm sure that we would have to limit the number of consecutive LCD panels because of the limited number of lumens from the backlight. Any thoughts?
espoderelict, Feb 21 2006

You can buy one http://store.sharps...uct.asp?sku=2555920
[theircompetitor, Feb 21 2006]

Japanese 3D Display http://www.aist.go....60210/20060210.html
The real deal [neutrinos_shadow, Feb 21 2006]

3D Video Display in Air http://www.io2technology.com/
3D coming slowly to a desktop near you... [csea, Feb 22 2006]

Heliodisplay (see link above) patent application http://appft1.uspto...2&RS=DN/20040001182
Laminar flow of condensate particles etc. [Ling, Feb 22 2006]

Patent: Micromirror holographic screen http://appft1.uspto...aphic+AND+IN/garner
[spidermother, Feb 22 2006]

Encrypted_203D_20LCD_20screen Anaglyphic rather than volumetric display [spidermother, Feb 22 2006]

[link]






       Why not have a single LCD spinning fast, the image changing to make up a 3D picture as it spins, much like those clocks with a single bar whipping back and forth?
DrCurry, Feb 21 2006
  

       I see your idea on the website theircompetitor, but the use a simulated 3D effect. the idea I have is more of an actual 3-dimensional image created. It's really cool though. I'd like to try one out
espoderelict, Feb 21 2006
  

       DrCurry, what you describe is available... I'll look for a link.
zigness, Feb 21 2006
  

       [espoderelict], the link is a product that creates an ACTUAL 3D effect. It's not simulated... just read it's description a little more closely.
zigness, Feb 21 2006
  

       The Japanese have recently demonstrated actual, floating image (well, large, low-res points) 3D display. See link...
neutrinos_shadow, Feb 21 2006
  

       I've seen a stab taken at this a couple of years ago, although I don't know what their technique was. It was unimpressive, however.
normzone, Feb 21 2006
  

       Here's another attempt at 3D projection (using watervapor?) [link]
csea, Feb 22 2006
  

       I don't think it would work quite as you describe - LCD displays work by rotating the polarisation of polarised light to alter the amount that passes through a second polariser, so the layers would not work independently of each other. At best, you could create an image that works from a single point of view, and if combined with a tracker to determine the position of the viewer relative to the screen it could produce a convincing illusion (for one viewer at a time). You could maybe make the image appear correctly to both of the observer's eyes, but I doubt it. You would probably have to close one eye, then move your head around to experience the effect.   

       If each panel had an additional layer to randomise the polarisation of the light, or polarise it in a particular direction, without altering the intensity (i.e. the intensity is independent of the previous polarisation) then you might have some luck. This would make the panels independent of each other.
spidermother, Feb 22 2006
  

       I didn't read all of the patent, but it seems to me that if several laminar flows (see heliodisplay link) were stacked, and several projectors were used, then a deeper 3D image might be made.
Ling, Feb 22 2006
  

       It seems these are called volumetric displays, as distinct from flat displays which merely create the illusion of 3D. Nice to have the jargon.   

       It occurs to me that the layered LCD screen might have a different use. Posting coming...   

       Oh, and a here's a patent for a micromirror holographic screen (link). Its use of LCD is more incidental.   

       [edit] Encrypted 3D LCD screen (link).
spidermother, Feb 22 2006
  
      
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