3D display technologies

8/7/2019 3D display technologies

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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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3D display technologies

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