ELECTRONICS SEMINAR TOPIC HELIO DISPLAY

Heliodisplay Seminar Report 13

CONTENTS

1.Aknowldgement

2. Introduction

3. Heliodisplay and its Principles

4. History

5. Working

6. Mid Air Video Display

7. Models

8. Negative Aspects

9. Applications

10. Conclusion

11. Reference

Dept. of Electronics ELDHOSE GEORGE


ACKNOWLEDGEMENT

Mot iva t ion is a d r iv ing fo rce beh ind every

successfu l Venture . So was in the case o f my seminar

too . Wi th regard to the comple t ion o f the seminar I

w ish to acknowledge the fo l lowing peop le were sources

o f mot iva t ion beh ind i t . F i rs t and fo remost I render ou t

s incere gra t i tude t ,our p r inc ipa l fo r p rov id ing me w i th

good fac i l i t i es and proper env i ronment fo r deve lop ing

my seminar .

I ex tend my earnes t thank fu l lness to our Head

Of Depar tment ,Pro f .PARVATHI BHASKAR;and I express

my thanks to a l l t each ing and non teach ing s ta f f fo r

the i r k ind co -opera t ion and gu idance fo r p repar ing and

present ing th is seminar .

I w ish to thank a l l o ther my be loved

f r iends who ass is ted me in severa l ways dur ing the

comple t ion o f seminar and a lso my parents fo r the i r

exhaust ive zea l and b less ing and the above everyone I

express my hear t fe l t g ra t i tude to the a lmight fo r

shower ing h is g race and b less ings on me as a resu l t o f

wh ich th is seminar has been comple ted successfu l in t ime



INTRODUCTION

Heliodisplay is a hi-tech projector that displays pictures in the air. The

Heliodisplay is a free space display developed by IO2 Technology. A

projector is focused onto a layer of mist in mid-air, resulting in a two-

dimensional display that appears to float. As dark areas of the image

may appear invisible, the image may be more realistic than on a

projection screen. Heliodisplay can work as a free-space touch screen

when connected to a PC by a USB cable. A PC sees the Heliodisplay as

a pointing device, like a mouse. With the supplied software installed,

one can use a finger, pen, or another object as cursor control and

navigate or interact with simple content.

Heliodisplay is a patented projection system designed to project video,

products, information, people in mid-air (50" & 90" diagonal form factor).

Heliodisplay is part of a complete two-piece solution (base unit and

projection unit). You can connect the Heliodisplay to any video output,

or insert a CF (Compact Flash) card with AVI or JPEG files into the

Heliodispay, and project any images or video in mid-air. Press the power

button (eco-friendly, low power consumption 100watts, 280watts),

connect the video source, and you will see images in air (some content

is better than others). No special programming is required as this works

like a standard mouse driver. IO2 Technology ships Heliodisplays

worldwide. We can work with you to deploy Heliodisplays in your

location. Heliodisplays work on any power source, 90-240V, 50 or 60 Hz.

No fog or special chemical is required. Heliodisplay does not affect the

environment as it works using the existing air that is already in the room

to create the image. An internal water tank of 8 liters filled with regular

tap water lasts one to two days on the L90 and a 3 litre tank on the M50

lasts a day. A supplied water tank can be configured for operating

continuously for a week, month or years. Heliodisplay M50 are ready

place on a table or the L9 sits on the ground. No truss work or hanging



necessary. Easily extending a few lines allows the system to run for

multiple days/weeks/ months or years. Heliodisplays images hovers 5

cm (2´) beside the unit. Heliodisplay works in any controlled indoor

lighting, such as the lighting in stores, museums, offices, and lobbies.

Heliodisplays image looks best when the hardware is hidden inside

furniture or structures.

Heliodisplay & its Principle:-

The heliodisplay is an interactive planar display. Though the image it

projects appears much like a hologram, its inventors claim that it

doesn't use holographic technology, though it does use rear projection

(not lasers as originally reported) to project its image. It does not require

any screen or substrate other than air to project its image, but it does

eject a water-based vapour curtain for the image to be projected upon.

The curtain is produced using similar ultrasonic technology as used in

floggers and comprises a number of columns of fog. This curtain is

sandwiched between curtains of clean air to create an acceptable

screen. Heliodisplay moves through a dozen metal plates and then

comes out again. (The exact details of its workings are unknown,

pending patent applications.)

It works as a kind of floating touch screen, making it possible to

manipulate images projected in air with your fingers, and can be

connected to a computer using a standard VGA connection. It can also

connect with a TV or DVD by a standard RGB video cable. Though due

to the turbulent nature of the curtain, not currently suitable as a

workstation. The Heliodisplay is an invention by Chad Dyner, who built it

as a 5-inch prototype in his apartment before founding IO2 technologies

to further develop the product.

The heliodisplays are interactive, allowing a finger or hand to move

images around in the air as if one were grabbing a virtual object. it



requires a power outlet, and a computer, TV, DVD or alternate video

source. The current version of the Heliodisplay projects 30" diagonal

images in 4:3 and 16:9 aspect ratio. The Heliodisplay system is

backward compatible and accepts most 2D video sources (PC, TV, DVD,

HDTV, Video game consoles). For connection to a computer, the

Heliodisplay uses a standard monitor VGA connection; for TV or DVD

viewing, it connects using a standard RGB video cable.

Heliodisplay images are easily viewed in an office environment. Like any

computer monitor or TV, images appear brighter the lower the ambient

light. Also, just like viewing any computer monitor or TV, viewing a

Heliodisplay image in direct sunlight is almost impossible. The image is

display into two-dimensional space (i.e. planar).

Viewing requires no special glasses or background/foreground

screening. Of course, with any type of display, the darker the

background and lighting, the higher the contrast of the Heliodisplay

images or an display on the market. The Heliodisplay interactive is like a

virtual touch screen. A hand or finger can act as a mouse for cursor

control interactivity in a computer environment. No special glove or

pointing device is required. Just as you use a mouse to move the cursor

on a traditional computer monitor, you can use your finger to move the

cursor around the Heliodisplay image. It would surely be a great

experience to handle them.

HelioDisplay projects the images into free space



How would you like to see a holographic-like image displayed in the air

from your tv or mobile device? Sound like science fiction. Apparently

not, according to IO2 Technology "IO2 Technology develops technology

relating to next-generation interfaces some of which arenot currently

available, one platform is the Heliodisplay. Heliodisplay images are not

holographic although they are free-space, employing a rearprojection

system in which images are captured onto a nearly invisible plane of

transformed air. What the viewer sees is floating mid-air image or video.

These projected images and video are two-dimensional, (i.e. planar) but

appear 3D since there is no physical depth reference. While

conventional displays have the benefit of being attached to a physical

substrate, Heliodisplay projections are suspended in air, so you will

notice some waviness to the quality of the projections.



The Heliodisplay requires a power outlet, and a computer, TV, DVD or

alternate video source. The current version of the Heliodisplay projects

30" diagonal images in 4:3 and 16:9 aspect ratio. The Heliodisplay

system is backward compatible and accepts most 2D video sources (PC,

TV, DVD, HDTV, Video game consoles). For connection to a computer,

the Heliodisplay uses a standard monitor VGA connection; for TV or

DVD viewing, it connects using a standard video cable. The Heliodisplay

is designed to be concealed (i.e. into furniture) and hidden out of sight

thereby creating an unobtrusive display.

The Heliodisplay interactive is like a virtual touch screen. A hand or

finger can act as a mouse for cursor control interactivity in a computer

environment. No special glove or pointing device is required. Just as

you use a mouse to move the cursor on a traditional computer monitor,

you can use your finger to move the cursor around the Heliodisplay

image. It would surely be a great experience to handle them.

HISTORY

In late 2003, a small company from the San Francisco Bay Area

demonstrated a unique revolutionary display technology. The (then)

prototype device projected an image in thin air just above it, creating an

illusion of a floating hologram, reminiscent of the famous scene from

'Star Wars' in which R2-D2 projects a hologram of Princess Leia. The

development of this distinctive technology, dubbed Heliodisplay by its

developer Chad Dyner, began early this decade after Dyner decided to

trade a promising career as an architect to become a inventor. Dyner

bought an ordinary digital projector, took it apart, and spent entire ways

trying to figure out a way to stop in midair the light coming from the

projector without engaging a traditional screen. Though the details are

kept a closely-guarded secret, Dyner was willing to provide a general

description of the way the Heliodisplay works.



Displaying an image using conventional projectors requires a non-

transparent medium, typically screens, walls, or even water, but air,

which is transparent, cannot

Fogscreen display

be used. A more recent development is the Fog Screen, which 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. The Heliodisplay creates a

similar effect, but, instead of fog, it uses a cloud of microscopic

particles whose specific nature is one of the secrets Dyner keeps close

to the vest. In 2005, the U.S. Patent Office granted Dyner a patent for a

"method and system for free-space imaging display and interface".

Apparently, the Heliodisplay creates a particle cloud by passing the

surrounding air through a heat pump, which in turn cools the air to a



level below its dew point, where it condensates, and is then collected to

create an artificial cloud. The particle cloud is composed of a vast

number of individual micro droplets, between 1- 10 microns in diameter,

too small to be visible to the naked eye, held together by surface

tension. The focus and illumination intensity of the projected image can

be controlled by changing some of the cloud's properties, enabling a

sharper and brighter image.

Heliocast - interactive Heliodisplay

Since 2003, IO2 Technology, the California-based company Dyner

founded to commercialize his invention, began selling his device under

the brand name Heliodisplay M2 for just under $20,000, out of reach of

most consumers. IO2 Technology is actually marketing the M2 to

corporate customers who would use the device as a novel way to

display the company's logo or as a strikingly impressive advertising and

promotional tool for exhibitions. The M2 projects its 76.2 cm (30'')

diagonal floating image at a height of 71 cm (28") above the projector.



The native resolution of the M2 is 800 x 600 though it can support up to

1280 x 1024,and the image can be viewed from as much as a 150

degrees angle. The M2i model includes a proprietary system, called

Heliocast, for interactively controlling the displayed image. A sensor

inside the M2 identifies the movement of the user's hand in the area of

the projected image and the Heliocast software calculates the movement

of the object projected.

TFOT recently covered another unique display technology, called

Perspecta, developed by Actuality Systems. Unlike the Perspecta, which

is a true 3D display capable of showing a 3D object perceived when

simply walking around the display, the M2 displays a 2D image in midair,

creating the illusion of depth. While the Perspecta is currently used

mainly for medical and research purposes, the M2 is intended primarily

for corporate use as a promotional or advertising tool at this stage.

Although it is possible to view movies or play games on the M2, Dyner

admitted that the current device is not intended for serious applications

such as CAD (computer-aided design). The Perspecta is an enclosed

device with lower resolution but with the capability to display a full 3D

image and video with almost no flickering or wavering effects. A future

display might incorporate the best of both worlds: an open-air display

with high resolution, clear 3D capability, along with an accurate

interactive capability.

WORKING

The Heliodisplay transforms water into a unique screen of fine vapour,

suspended in mid-air to create a nearly invisible screen into which any



image can be projected. The display can create a true 3D hologram

effect when the right content is used.

The mist is formed by a series of metal plates, and the original

Heliodisplay could run for several hours on one liter of tap water. 2008

model Heliodisplays use 80 ml to 120 ml of water per hours depending

on screen size and user settings, and can be built with any size water

tank.

The system supports all those formats compatible with Win2000, XP and

Mac platforms. This is just a display, and works similar to one.

HelioDisplay Working Model



The Heliodisplay uses no additives or chemicals, only plain tap water

(you can also use distilled water, ionized water or demineralised water if

desired).The image feels just like air and there is no noticeable

difference. Images are visible under typical indoor lighting. Similar to

any display on the market, the darker the ambience, the brighter the

image will be perceived. It does not use any gas except the surrounding

air that you are already breath; and is not toxic.

An internal or external tank (depending on mode) needs to be refilled

with regular tap water for operation. The tanks last a few days to a week

(depending on settings and operating time) or can configure for

constant use. Heliodisplays use 80 ml to 120 ml of water per hour,

depending on screen size and user settings, and can be built with any

size water tank.The system supports all those formats compatible with

Win2000, XP and Mac platforms. This is just a display, and works similar

to one.



Viewing requires no special glasses.

Viewing from more than70 deg off centre

Angle of Viewing




difference. Images are visible under typical indoor lighting.



Displaying Data in Thin Air

The first permanent prototype was installed in the Vapriikki museum in

Tampere and has since been loaned for use in France. FogScreen is

renting some devices and expects to begin sales soon. Rakkolainen

said, ³This project started as a wild idea.´ The researchers formed

FogScreen Inc. last year and are currently marketing the device.

Although Heliodisplay and FogScreen are interesting, it remains to be

seen if wo new techniques represent the latest approach to display

technology: doing away with the screen. While unlikely to replace the

desktop computer monitor, these thin-air displays could eventually be

put to use in product showrooms, museums military training facilities,

corporate conference rooms, trade fairs, theme parks, and

Avertisements.

Chad Dyner, a graduate student at the Massachusetts Institute of

Technology and chief executive officer for IO2 Technologies, has

invented the Heliodisplay, which condenses the air above a video

projector. The device then projects an image onto the condensed air,

Dyner said. IO2 has constructed proof-of-concept devices with 5-, 15-,

27-, and 42- inch screens. These can display twodimensional images

that hover above the projector. Because they are displayed on a surface

that is not flat, the images appear 3D from a few feet away and can be

seen from any surrounding position. yner said he created IO2

Technology license the technology to one or more key players in the

display market or companies that have the manufacturing capability to

produce and distribute Heliodisplay.´ Senior researcher Ismo

Rakkolainen and Professor KarriPalovuori of Finlands Tampere

University of Technolog have developed the FogScreen, a display

surface made out of a cloud of water vapor diffused into the air as a very

dry fog. A projector can display images on the FogScreen.



It appears dry to the touch, so it feels just like air,´ Rakkolainen

explained. Viewers will thus see images they can walk through without

getting wet. The water vapor is diffused between thick layers of emitted

stable air, which keeps the fog thin and flat, enabling high-quality

images, he added. they will be cost effective and will find an important

use, said analyst Chris Chinnock of Insight Media, a displayindustr

research firm. Both are more likely to work as advertising or information

screens in museums, public displays, entertainment centers, etc.,´ he

explained. ³These are specialty displays that need a novel experience

and they need to be marketed and positioned as such.

FogScreen technology, invented by two Finnish researchers, projects

an image onto a display surface of water vapor diffused into the air as a

very dry fog. Viewers can even put their hands through the images. Any

fan of the movie Starwars or Minoriy Report or a similar futuristic movie

is in for a real delight because one of the features that these movies

boasted, was 3D Virtual Holographic Displays and seemingly Floating

TouchScreen Displays are now a reality!

Yes you are not dreaming, these displays and the technology for these

diplays has been finally perfected! IO2 Technologies have developed

displays under the brand Heliodisplay, which projects any standard

computer or video cable attached to the Heliodisplay system, and

project video or images into mid-air.



Various models are available ranging sizes from 30 , 50 and 100

(diagonal) areas. The µi´version allows for a ³virtual´ touchscreen (new

for December 2007). No special hardware or software is required to view

images. The 30 Heliodisplay is now only 5.9 tall, and weighs 15lbs. The

50 and 100 are each only 10 tall and weigh 28lbs, and 68lbs respectively.

All afford a wide range of flexibility and options.

Features:

The new M3 / M3i boasts ³an improved tri-flow system for increased

image stability and uniformity,´ enhanced brightness and clarity, a 1,024

x 768 resolution, 16:9 or 4:3 aspect ratios, 2000:1 contrast ratio, VGA / S-

Video / composite inputs, USB, NTSC / PAL compatibility, and

significantly quieter operation´ to boot. Marketed to the uber-wealthy

and board room runners who’d like to teleconference on a free- space

device (and blow the minds of clients), the basic M3 is available for a

stiff $18,400, while the M3i which also serves as a computer input



device for cursor control in a desktop environment´ will set you back a

whopping $19,400.



When the Heliodisplay is connected to a PC using a

standard USB cable, and with the supplied IO2 Heliocast software

installed, you can use your finger for touchscreen control to navigate

and interact with content such as drag & drop, clicking, double clicking

etc as one would on a standard PC. This is available starting December

2007.

The heliodisplay is an interactive planar display. Though the image it

projects appears much like a hologram, its inventors claim that it

doesn't use holographic technology, though it does use rear projection

(not lasers as originally reported) to project its image. It does not require

any screen or substrate other than air to project its image, but it does

eject a water-based vapour curtain for the image to be projected upon.

The curtain is produced using similar ultrasonic technology as used in

foggers and comprises a number of columns of fog. This curtain is

sandwiched between curtains of clean air to create an acceptable

screen. Heliodisplay moves through a dozen metal plates and then

comes out again. (The exact details of its workings are unknown,

pending patent applications.)

It works as a kind of floating touch screen, making it possible to

manipulate images projected in air with your fingers, and can be

connected to a computer using a standard VGA connection. It can also

connect with a TV or DVD by a standard RGB video cable. Though due

to the turbulent nature of the curtain, not currently suitable as a

workstation.

The Heliodisplay is an invention by Chad Dyner, who built it as a 5-inch

prototype in his apartment before founding IO2 technologies to further

develop the product.






difference. Images are visible under typical indoor lighting. Similar to

any display on the market, the darker the ambience, the brighter the

image will be perceived. It does not use any gas except the surrounding

air that you are already breath; and is not toxic.

An internal or external tank (depending on mode) needs to be refilled

with regular tap water for operation. The tanks last a few days to a week

(depending on settings and operating time) or can configure for

constant use. Heliodisplays use 80 ml to 120 ml of water per hour,

depending on screen size and user settings, and can be built with any



size water tank.The system supports all those formats compatible with

Win2000, XP and Mac platforms. This is just a display, and works similar

to one. The Heliodisplay uses no additives or chemicals, only plain tap

water (you can also use distilled water, ionized water or demineralised

water if desired,

Mid air video display

Project video or images into mid-air

Supports

FLASH

QUICKTIME



Text

Added Capabilities installed Software

Cursor control

Navigate and interact

with simple content



MODELS

M1

The original M1 units produced by IO2 were advanced prototypes and

proof-of-concept, but a few were sold to early adopters through

channels such as eBay.

M2

The second-generation M2 Heliodisplay supports a 30" image with 16.7

million colors and a 2000:1 contrast ratio. The interactive M2i version

includes virtual touch screen capability.

Specifications

1. Image Size: 30 measured diagonally (4:3 aspect)

2. Interactivity: Virtual Cursor Control ± Heliocast ver. 2.0

3. Aspect Ratio: 4:3 or 16:9

4. Resolution: Native ± SVGA 800×600 pixels; Resize Support:

640×350 to 1280×1024 pixels

5. Contrast Ratio: 2000:1 (at projection source)

6. Color Reproduction: 16.7 Million colors/ full frame video

7. Video Input connectors: RGB analog, USB, RCA video, S-VIDEO,

VGA

8. Input signal frequency: Fh: 31-80kHz; Fv: 56-120Hz



9. Video & PC Compatibility: PC, Mac, NTSC, PAL, SECAM HDTV:

480i/480p, 720p, 1080i

10. Image Translucency: Controllable visibility

11.Operational Sound Level: 38 dB

12.Electric Power Voltage: 95-115 or 220-240V VAC

13.Electric Power Frequency: 47-63 Hz

14.Electric Power Consumption: 350W

15.Working Temperature Range: 55F (12C) to 95F (35C)

16.Working Humidity Range: 25% ± 95%

17.Weight: 34.5lbs/ 15.7kg

18. Dimensions: (W): 28.3 , (D): 15.9 [29.8" expanded], (H): 9.3 (71.8cm

x 39.6cm [76cm expanded ] x 36cm)

19. Warranty: six months limited parts and labor.

M3 and M30

The new third-generation M3 version launched on February 28, 2007 has

the same basicspecifications as the M2 but is said to be much quieter,

with improved brightness and clarity any more stable operation with an

improved tri-flow system.

Apart from displaying at a standard ratio of 4:3 in addition it also

displays 16:9 widescreen ratios. There is also an interactive version

called the M3i.

The M30 is the updated version of the M3, which fits into the current

model numbering system, 30 designating the diagonal screen size.



M50 and M100

In late 2007, IO2 Technology introduced two larger Heliodisplays, the

M50 and M100. The M50 has a 50" diagonal image, equivalent to

displaying a life-size head-and-shoulders person. The M100 has a 100"

diagonal image, equivalent to displaying a large full-body person (about

2 meters tall).

According to the press release, the Heliodisplay is now available for

purchase. Heliodisplays are available in projecting image sizes from 22

to 42 inches (diagonal), and is available with interactive features. IO2

Technology's website (http://www.io2technology.com), which has

Heliodisplay(TM) units available for direct purchase, demonstrates how

a user can move the image of a watch in mid-air with their finger.

I saw this device demonstrated at Wired NextFest, a technology

exposition in Chicago earlier this summer, and it really works - it's an

impressive device.



In his Dune novels, Frank Herbert makes use of something he calls a

"solido projector" – a device that forms an image directly on a

conference table. Films like Star Wars show how images projected into

the air might be used. The Heliodisplay from IO2Technology projects

images - both still pictures and video - into mid-air. It works with most

video sources. It is also interactive, forming a floating touch screen that

can be manipulated with your hands.



(From Heliodisplay)

The image is two-dimensional, not volumetric.

The science fiction film Star Wars has several famous examples of how

a projection device like this might be used. For example, in the scene

below, R2D2 and Chewbacca are playing a board game with projected

pieces.



As shown in the diagram below, air flows into the device, is modified

and then ejected and illuminated to produce the image. Nothing is added

to the air; nothing affects air quality. Images can be seen up to 75

degrees off aspect, similar to an LCD screen; no special glasses or

projection screens are required.

(From Heliodisplay diagram)



MODEL L90

L90 is another model developed of heliodisplay by the IO2

Technologies. It has a model as shown in figure 3.4. This is also an

updated version of previous models. It has an interactive version also,

called L90i. L90 is backward compatible.

P-SERIES

P-series Heliodisplay Projection systems are designed with simpler

operation functionality and advanced controls for integrating and use.

P-series incorporate an optical sync between components that they are

in direct communication link so only one button or trigger is required to

operate as they all turn on and shut down in sync. Communication ports

allow for the helio projection and helio base to be controlled remotely in

an installation via a remote controller or PC. Onboard diagnostic

features support timing and other advanced independent controls via a

controller or PC. Built in gesture control allows even simpler operation,

such as hand waving to turn on the unit without actually touching the

device. To project the images and videos, air should be touched. The

PRX2 projection unit includes proprietary baffling to reduce the viewing



of the light source and beam-steering optics shorten the throw distance

by 10"(25cm) while simultaneously allowing for easy control of the

projection angle without even moving the projection. In addition, and

only available in the in the P92", the base system can operate in any

orientation from 0-180 degrees. It also has USB playback from

projection unit. Various parts of the P- series are shown



Proposed applications for the real-world Heliodisplay include:

Advertising and Promotion, e.g.: trade shows; in-store displays;

museum, movie and casino displays; theme parks.

Collaborative Decision Making, e.g.: board meetings and

presentations; air-traffic control; military command and control;

architectural and engineering design; teleconferencing.

Simulation & Training, e.g.: virtual targets; pre-operative planning;

virtual surgery.

Consumer, e.g.: video games; home theatre.

Heads-up displays in new fields, e.g.: a patient's vital signs could

hover above the chest during open heart surgery.

Build one into a door jamb and have a walk through image or

virtual privacy screen.

An in-store end cap advertising display and demonstration

through which the customer can reach and grab shown product.

Build the Heliodisplay into furniture, e.g. project from desk.



.

ADVANTAGES AND DISADVANTAGES

Advantages

The main advantage of heliodisplay is that it needs no screen

to project image. It changes the air and creates a dynamic non-solid

particle of cloud on to which the image is projected. The device is also

light weight and designed to conceal inside furniture. Therefore we can

create an effect of displaying images in mid-air. Also nothing is added

to the air; nothing affects air quality. Hence it does not cause any health

problems. No special glasses or projection screens are required to see

the images projected by heliodisplay. Heliodisplay does not create fog.

So it does not cause any problems to the other electronic equipments in

its vicinity. Projected images and video are two-dimensional, (i.e.

planar) but appear 3-D since there is no physical depth reference. Also

heliodisplay can project images from all the normal sources like DVD

player or PC. It can be used in any country since it works on 95115 or

220-240V VAC. With Heliodisplay, imagery can be seen up to 75 degrees

off aspect for a total viewing area of over 150 degrees. Translucency is

controllable with the Heliodisplay.

Disadvantages

Heliodisplay is very expensive. It starts from Rs. 700000/-

onwards.Common people cannot afford it. Also it cannot be used

outdoors since any disturbance in air would affect the quality of the

image. wet and turbulence affecting seriously reduces the fidelity of

imagery. The image is slightly unstable and can clearly be seen in a

dark background



ADVANTAGES AND DISADVANTAGES

Advantages

The main advantage of heliodisplay is that it needs no screen

to project image. It changes the air and creates a dynamic non-solid

particle of cloud on to which the image is projected. The device is also

light weight and designed to conceal inside furniture. Therefore we can

create an effect of displaying images in mid-air. Also nothing is added

to the air; nothing affects air quality. Hence it does not cause any health

problems. No special glasses or projection screens are required to see

the images projected by heliodisplay. Heliodisplay does not create fog.

So it does not cause any problems to the other electronic equipments in

its vicinity. Projected images and video are two-dimensional, (i.e.

planar) but appear 3-D since there is no physical depth reference. Also

heliodisplay can project images from all the normal sources like DVD

player or PC. It can be used in any country since it works on 95115 or

220-240V VAC. With Heliodisplay, imagery can be seen up to 75 degrees

off aspect for a total viewing area of over 150 degrees. Translucency is

controllable with the Heliodisplay.

Disadvantages

Heliodisplay is very expensive. It starts from Rs. 700000/-

onwards.Common people cannot afford it. Also it cannot be used

outdoors since any disturbance in air would affect the quality of the

image. wet and turbulence affecting seriously reduces the fidelity of

imagery. The image is slightly unstable and can clearly be seen in a dark

background



RELATED TECHNOLOGIES

FOGSCREEN

Senior researcher Ismo Rakkolainen and Professor Karri Palovuori of

Finland's Tampere University of Technology have developed the

FogScreen, a display surface made out of a cloud of water vapor

diffused into the air as a very dry fog. A projector can display images on

the FogScreen. It uses a technology very similar to heliodisplay.

FogScreen is shown.

Unlike heliodisplay, FogScreen creates fog to display

images. The FogScreen uses fog as a projection surface, creating an

image floating in thin air. If people walk through the FogScreen, the

image will instantly reform behind them. It allows projection of

interactive content, such as images, videos or animations, to appear



floating in free space. It also enables to create special effects like

walking through a brick wall or writing fiery characters in thin air. The

FogScreen employs an optimized, patented method for forming a

physically penetrable 2D particle display. The basic principle is the use

of a large non-turbulent airflow to protect a flow of, for example, dry fog

particles inside it from turbulence. The outer airflow may get slightly

turbulent, but the inner fog layer remains thin and crisp, enabling high-

quality projections and the walk-through possibility. Ordinary tap water

is broken into fine fog droplets and trapped inside this non-turbulent

airflow. Even though the fog is made of water, it appears dry to the

touch, just like air. The resulting thin, stable sheet of fog enables

projections on a screen that is dry and feels like slightly cool air. The

light from a standard projector is scattered through this sheet of fog,

creating a rearprojection image.

VOLUMETRIC DISPLAYS

While head-worn displays attempt to create the appearance

of virtual objects within some work space, volumetric displays actually

create the 3D image of a surface within a volume. The surface can be

viewed from arbitrary viewpoints with proper eye accommodation since

each point of light has a real origin in 3D. Tracking of the viewer is not

necessary. Volumetric displays are based on a broad and diverse

collection of various methods, technologies and ideas. Numerous

techniques incorporating e.g., fibre optics, mirrors or oscillating

screens, have been developed to achieve this effect. Traub's display

creates a virtual image by varying the focal length of a mirror to

produce a series of 2D images at different apparent depths. A real 3D

image is generated by Actuality Systems' Perspecta display, which

draws 2D images on a quickly rotating screen to fill the entire volume

swept out by its path. A 3D display Actuality Systems' Perspecta is



shown in figure 6.2. The DepthCube Z1024 display takes yet another

approach, using 20 stacked LCD panels to light 3D points in space

without any moving parts. Unfortunately, these displays all create their

3D imagery in a fairly small enclosed volume that the viewer cannot

enter. They are more suited for computer graphics than video

applications due to the difficulty in capturing suitable natural imagery in

3D. One drawback is typically image transparency where parts of an

image that are normally occluded are seen through the foreground

object. Yet another difficulty that could give an unrealistic appearance

to natural images is that of the inability to display surfaces with a non-

Lambertian intensity distribution.

Actuality Systems' Perspecta 15

CONCLUSION

The heliodisplay is a relatively new technology and is still being

developed. Heliodisplay works as a kind of floating display and touch

screen, making it possible to manipulate images projected in air with

our fingers. Though it has some flaws the attention that it brings is

enormous. Its various applications such as in advertising, a board room

etc suggests that its future scope is very large. Several other thin air-

displays are available but heliodisplay out classes them and as a result

it has more market value. Though it is currently expensive and



unaffordable heliodisplay technology has a great potential. It is the

future generation display where we can see images projected into mid-

air without the help of a solid screen. It could be used for museum or

trade-show displays or for advertisements, and would be ideal for

collaborative work.

Heliodisplay is a good projection unit which does not require any special

hardware and support videos and jpg images, flash, quick time etc. we

can also play games on heliodisplays. This unique technology,

developed by a former architect, creates one of the most convincing

open-air holographic-like images in existence. Heliodisplay can work as

a free-space touch screen when connected to a PC by a USB cable. A

PC sees the Heliodisplay as a pointing device, like a mouse. With the

supplied software installed, one can use a finger, pen, or another object

as cursor control and navigate or interact with simple content.

REFERENCES

1. Heliodisplay Floating Display; Tuesday, November 28, 2006 - Iddo

Genuth

2. IO2 Technology intros floating M3 Heliodisplay screen by Darren

Murphy Feb 28,2007

3. IEEE SPECTRUM August 2004,volume 3 7

4. DiVerdi, Rakkolainen, Hollerer, Olwal, A Novel Walk-through 3-D

Display. Proceedings of SPIE 2006 Electronic Imaging, Vol.6055,428-

437, January 2006.

5. Heliodisplay-Futuristic display technology by Bill Christensen,

August,2005



6. Rakkolainen, K. Palovuori, Laser Scanning for the Interactive Walk-

Through FogScreen. ACM Virtual Reality, Software and Technology

(VRST 2005) Monterey, CA, USA, November 7-9, 2005

7. dnp Holo Screen. DNP, http://www.dnp.dk/.


http://www.dnp.dk/

ELECTRONICS SEMINAR TOPIC HELIO DISPLAY

Engineering

Transcript of ELECTRONICS SEMINAR TOPIC HELIO DISPLAY