This document provides an overview of heliodisplay technology. It describes how heliodisplay works by projecting images onto a mist or vapor screen in mid-air, creating a floating display. The document outlines the history and development of heliodisplay since its invention in 2003. It discusses the principles, features, applications, and comparisons to related display technologies like fog screens and volumetric displays. Both advantages and limitations of heliodisplay are presented.

2. Contents
Introduction
Helodisplay: A System Overview
Principle
Working
History
Models & Features
Applications
Negative Aspects
Related Technologies
Conclusion

3. Introduction
Heliodisplay is a technology used
for displaying images in mid air.
Invented by Chad Dyner
In the heliodisplay, a projector
focuses the image onto a layer of
mist in mid-air, resulting in a two-
dimensional display that appears to
float.

4. Helodisplay: A System Overview
The heliodisplay is an interactive planar display.
It does use rear projection
Eject a water-based vapour curtain for the image to be
projected upon.
It works as a kind of floating touch screen
Possible to manipulate images projected in air with your
fingers

5. HISTORY
In late 2003, Chad Dyner demonstrated a unique revolutionary
display technology.
Figured out a way to stop in midair the light coming from the
projector.
Used a cloud of microscopic particles.
In 2005, the U.S. Patent Office granted Dyner a
patent for a "method and system for free-space
imaging display and interface".
• Dyner found IO2 technologies to commercialize the
heliodisplay….

6. PRINCIPLE
• “Frustrated Total Internal Reflection”(FTIR)
• Contains an IR camera and a IR light emitting diode
• The internal reflection of the IR-light, is interrupted as soon as a finger
touches the acrylic surface.
• The images that are generated by the camera contain white blobs.
• 'HELIOCAST' to interactively control the displayed images.

8. WORKING

9. WORKING OF HELIODISPLAY
The device converts the imaging properties of the air so that the air
is taken in, converted instantaneously, and then re-ejected out
The system thus creates a dynamic, non solid particle cloud by
ejecting atomized condensate present in the surrounding air
Now the projector projects the given input on the found invisible
screen

10. • The vapour screen is a particle
cloud created by passing the
surrounding air through a heat
pump which in turn cools the air
to a level below its dew point….
• These particle cloud consists of
individual micro-droplets ,held
together by surface tension….

11. KEY FEATURES
• No other additives or chemicals are needed only plain tap water is
necessary..
• Similar to other display darker the ambience brighter the image…
• It does not use holographic technique ,though both have
similarities…

12. KEY FEATURES(cont..)
• Images can be seen up to 75 degrees off aspect similar to LCD
screen…
• Viewing requires no special glasses or any other background
or foreground screening..

13. Developments in heliodisplay
MODEL M1
MODEL M2
MODEL M3 and M30
MODEL M50 and M100
Model L90
P-SERIES

14. Specifications
1024 x 768 resolution, 16:9 or 4:3 aspect ratios.
2000:1 contrast ratio
Supports all formats
Projects any images that would be viewable on a computer
screen or televison
No specialized hardware or software
3D compatible

15. Applications
Advertising/promotion
Video conferencing
Virtual surgery and pre-operative planning
Military training programs
Gaming/artwork
Engineering/architecture plans
Build the Heliodisplay into furniture

16. Advantages
No screen to project images
Device is light weight and can be converted into a furniture
Nothing is added to air. Nothing affects air quality
Projected images and video are two-dimensional, but appear
3D since there is no physical depth reference
Heliodisplay does not create fog, so no electronic devices in
the room are affected

17. Advantages (cont..)
Heliodisplay can be used in any country since it works on 95-
115 or 220-240 VAC
Heliodisplay, imagery can be seen up to 75 degrees off aspect
for a total viewing area of over 150 degrees
No special glasses required to see the display
Translucency is controlled by the heliodisplay

18. NEGATIVE ASPECTS
• Needs controlled lighting for best working conditions..
• Images becomes less visible under bright light
• Wind and bright light interferes with image visibility..
• Expensive….

20. Fogscreen is a display surface made out of a cloud of water
vapor diffused into the air as a very dry fog

22. A real 3D image is generated
by Perspecta display, which
draws 2D images on a quickly
rotating screen to fill the
entire volume swept out by its
path

23.  Fog Screen:Finland Tampere Univ.
-creates fog to display the image
-provides a thinner screen
-tap water is broken into fine fog particles
 Volumetric Displays:Traub
-uses perspecta display
-good for 3D display
 Large Translucent Displays:
-Consist of an acrylic plate that is coated with a
holographic film

24. Conclusion
Heliodisplay has great potential and would be ideal for collaborative
work
Heliodisplays is still in the initial stages and the flaws of cost and
environment of positioning will soon be overcome.
Several other thin air-displays are available but heliodisplay
outclasses them, because of the attention it draws and its
maintainability, and as a result it has more market value
Its various applications such as in advertising, a board room etc
suggests that its future scope is very bright.

26. References
 Linda Dailey Paulson –“Displaying Data in Thin Air”
(IEEE March 2004-page no19-21)
 Stephen DiVerdia, Ismo Rakkolainena & b. Tobias Hollerera, Alex Olwala-“ A Novel
Walk-through 3D Display”
 C. Wheatstone. On Some Remarkable, and Hitherto Unobserved, Phenomena of
Binocular Vision. Philosophical Transactions of the Royal Society of London, Vol. 11, 1838
 Rakkolainen, K. Palovuori, A Walk-thru Screen. IS&T / Spie Electronic Imaging 2002,
Proc. of Conference on Projection Displays VIII, San Jose, CA, USA, January 23-24, 2002,
pp. 17-22