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.
NEED SEMINAR REPORT ON HELIODISPLAY ALONG WITH PRESENTATION
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Heliodisplay
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INTRODUCTION
Over the years, display technology has been growing, from simple CRTto plasma screen. But now display technology has reached a stage where images canbe displayed in thin air without the aid of a screen. A technology used for displayingimages in thin air is called Heliodisplay. Heliodisplay is a technology developed byChad Dyner, CEO for IO2 Technologies. In the Heliodisplay, a projector is focusedonto a layer of mist in mid-air, resulting in a two-dimensional display that appears tofloat. This is similar in principle to the cinematic technique ofrear projection. As dark areas of the image may appear invisible, the image may be more realistic than on aprojection screen, although it is still not volumetric. Looking directly at the display,one would also be looking into the projector's light source. Heliodisplay can work as a free-space touchscreen when connected to aPC 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 ascursor control and navigate or interact with simple content. The mist is formed by aseries of metal plates, and the original Heliodisplay could run for several hours on oneliter of tap water.
BASIC UNITS AND WORKING2.1 BASIC UNITS
Heliodisplay projects images as shown in figure 2.1.
The basic units of heliodisplay are base unit and projection source as shown in figure 2.2.
The projectionsource unit projects images onto the mid-air. The base unit produces the water vapourscreen necessary to display the image. The image can be viewed from behind the baseunit. The Heliodisplay is designed to be hidden (into a pedestal, table etc), so thatonly its projected image is visible. The display connects to a standard video source(such as DVD player or PC) and projects any images that would be viewable on acomputer screen or television. No specialized hardware or software is needed to viewimages. The Heliodisplay’s projected image hovers just above the base unit. Thedisplay is less bold than a normal computer screen. The housing of the Heliodisplay isfloor bound and water particles rise rather than descend.Figure 2.1. Heliodisplay projecting image
HELIODISPLAY4
The machine, uses no harmful gases or liquids. Nothing is added to theair so there isn`t any harmful gas or liquid emitted from the device, and nothing needsto be refilled. Operating the device will not change a room`s environment, air qualityor other conditions. If a Heliodisplay were left running for a week in a hermeticallysealed room, the only change to the room`s environment would be from the electricityused to run the device. The ambient air is bottom-projected and illuminated,generating the free-space image that floats in midair. It causes no odour in the air, andthe area onto which the images were projected seems dry to the touch. Dark background emphasizes the contrast of the image and is highly encouraged whendesigning a location to view the display. Viewing in direct sunlight is almostimpossible. Like any rear projection system, the images are best seen within 70degrees to either side as shown figure 2.4. Viewing requires no special glasses. Figure 2.4. Angle of viewing The image can also be manipulated by touch. A finger or some hand-held object can act as a mouse and seemingly drag images in midair. Handmovements are monitored by an optical tracking system, which is essentially a camera.