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BY
HARISH M (06671A0432)
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INTRODUCTION
What is a 3D Display?
3-D DISPLAY : A display describing the properties of an image
as human eye can recognize the basic parameters of the imageviz. height, width and depth.
Is it necessary of a screen to display an image or a scene ?
No screen is required now as we can project the image in mid-air creating a virtual screen in the atmosphere.
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DISPLAY TECHNOLOGY
Stereoscopic and autostereoscopic displays
Head-mounted displays Volumetric displays
Large translucent displays
Immaterial displays
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STEREOSCOPIC AND
AUTOSTEREOSCOPIC DISPLAYS
Stereoscopic displaysprovide slightly differentimages for the left and righteye.
Tracking of the user is notnecessary but the correctviewing perspective isrestricted, and user-wornglasses are required.
Autostereoscopic displaysrequire no special glasses orother user-worn devices
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HEAD-MOUNTED DISPLAYS
Displays virtual images directly
in front of the users eyes.
Correct point of view for the user.
Different left and right images
for stereo separation effects, but
focal length remains constant
across the entire image.
Collaboration requires each user
wear separate display hardware.
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VOLUMETRIC DISPLAYS
These displays all create their 3D
imagery in a fairly small enclosed
volume that the viewer cannot
enter.
More suited for computer
graphics than video applications.
A real 3D image is generated by
drawing 2D images on a quickly
rotating screen to fill the entire
volume swept out by its path.
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LARGE TRANSLUCENT DISPLAYS
Screens consist of an acrylic
plate that is coated with a
holographic film
Make the screen practically
transparent from the viewers
point of view, showing only
projected objects
Inherent single sidedness
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Screenless 3D display
a dream from star wars movies
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FogScreen technology
-Display image in fog
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WORKING OF FOGSCREEN DISPLAY
FogScreen, an immaterial indoor 2D
projection screen, which enables high-quality
projected images in free space.
Fog Screen creates an image in midair by
employing a large, non-turbulent airflow to
protect the dry fog generated within from
turbulence.
The result is a thin, stable sheet of fog,
sandwiched between two layers of air, on
which an image can be projected and even
walked through.
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PSEUDO 3D EFFECT
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IO2 TECHNOLOGY -
HELIODISPLAY
APPROACHING BY MIRAGEPHENOMENA
The Heliodisplay creates a similar
effect as fogscreen display, but, instead
of fog, it uses a cloud of microscopicparticles.
Mirages are actual meteorological
phenomena created by the refraction
of light through different densities of
air. Normally these different densities
are caused by different temperatures.
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HOW IT WORK?
Air is drawn in
A cloud of microscopic particles is
created
Cloud of microscopic particles is
ejected
so as to create a 3D screen
Digital projector unit illuminates theparticle cloud
creating a visible image
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MERITS : Easily viewed in an office environment.
Heliodisplay images appear 3D, even though in fact, the images
are planar.
Viewing requires no special glasses or background/foreground
screening. It is initiative to HAPTIC technology.
DEMERITS :
Viewing a Heliodisplay image in direct sunlight is almost
impossible.
It is very cost effective.
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APPLICATIONS
Advertising and Promotion
Collaborative Decision Making
Simulation & Training
Consumer
Heads-up displays in new fields
Build the Heliodisplay into furniture
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CONCLUSION
In developing a fully volumetric 3D display, the use of multiple FogScreens
in various configurations to allow images to occupy a tangible physical
volume surrounding the user.
The implemented system enables one to view 3D objects in mid-air andobserve them from almost any angle. Using it as an immaterial, head-
tracked dual-sided display, has led to an enhanced visualization experience.
It creates a strong visual effect of 3D objects floating in air, even when the
image is not stereoscopic.
In improving the sense of presence of virtual objects in the physical world by
integrating haptic feedback into the interface.
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