3d display technologies
TRANSCRIPT
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INDEX
OVE RVIE W
3D D I SPLAY TECHNIQUES S T E R E O S C O P Y
ANAGLYPH
POLARIZATION ECLIPSE METHOD
AUTOSTEREOSCOPY LENTICULAR SCREEN
PARALLAX BARRIER
3D GADGETS
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OVERVIEW
HUMAN VISION & PERCEPTION OF 3D WORLD
Human eyes are equipped with an absolutely amazing binocular
vision system. For objects up to about 20 feet (6 to 7 meters) away,
the binocular vision system lets us easily tell with good accuracy how
far away an object is.
The binocular vision system relies on the fact that our two eyes arespaced about 2 inches (5 centimeters) apart. Therefore, each eye
sees the world from a slightly different perspective, and the
binocular vision system in your brain uses the difference to calculate
distance. Your brain has the ability to correlate the images it sees in
its two eyes even though they are slightly different.
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PRINCIPLE OF 3D DISPLAY
Main concept behind 3D display is to
generate a sense of variation in depth.
To achieve this, two perspective of a
single image, each for one eye, is used.
The principle is to send an individual
image to each eye. our eyes cancorrelate these images automatically
because each eye sees only one of the
images.
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3D TECHNIQUES
ANAGLYPH
In this system, two images are displayed on thescreen, one in red and the other in blue (or green).The filters on the glasses allow only one image toenter each eye, and your brain does the rest.
DRAWBACK: You cannot have a color movie whenyou are using color to provide the separation, so theimage quality is not nearly as good as with thepolarized system.
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3D TECHNIQUES
POLARIZATIONTwo synchronized projectors project two
respective views onto the screen, each with a
different polarization. The glasses allow only one of
the images into each eye because they contain
lenses with different polarization.
DRAWBACK: It's very difficult to use the
polarization technique for home theater systems --
most methods would require you to coat your
television screen with a special polarizing film first.
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3D TECHNIQUES
ECLIPSE METHOD:Liquid crystal shutter glasse are used in conjunction with a dis
screen.Each eye's glass contains a liquid crystal layer which has the propert
becoming dark when voltage is applied, being otherwise transparent.
The glasses are controlled by an infrared, radio frequency, DLP-Link
Bluetooth transmitter that sends a timing signal that allows the glasse
alternately darken over one eye, and then the other, in synchronization w
the refresh rate of the screen.
Meanwhile, the display alternately displays different perspectives for e
eye, using a technique called alternate-frame sequencing, which achieves desired effect of each eye seeing only the image intended for it.
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3D TECHNIQUES
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3D TECHNIQUES
Lenticular sheet
This method relies on a display coated with a lenticular
film. Lenticules are tiny lenses on the base side of a
special film. The screen displays two sets of the same
image. The lenses direct the light from the images toyour eyes -- each eye sees only one image. Your brain
puts the images together and you interpret it as a three-
dimensional image.
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3D TECHNIQUES
PARALLAX BARRIER A parallax barrier is a device placed in front of
an image source, such as a liquid crystal
display, to allow it to show a stereoscopic
image without 3D glasses. Placed in front of
the normal LCD, it consists of a layer ofmaterial with a series of precision slits,
allowing each eye to see a different set of
pixels, so creating a sense of depth through
parallax in an effect similar to what lenticular
printing produces for printed products.
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3D GADGETS & APPLICATIONS
3D MOVIE CLASSIC ANAGLYPH T POLARIZATION TECHN
3D CAMERA MULTI-VIEW & LIGHTINGRADIENT ALGORITHM ACTIVE SHUTTER
3D GAMING ACTIVE SHUTTER GLAS (NVIDIA 3DVISION GPU
3D TV AUTOSTEREOSCOPY ACTIVE SHUTTER GLA
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