
Heliodisplay was invented by Chad Dyner, who built it as a 5-inch prototype in his apartment. Heliodisplay is an interactive planar display where the image is projected much like a hologram without using holographic technology. Instead it uses rear projection 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 vapor 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. It works as a kind of floating touch screen, making it possible to manipulate images projected in air with your fingers. It can also be connected to a computer using a standard VGA connection and to a TV or DVD by a standard RGB video cable.






