Multitouch Screen

for: whitevoid

For Oticon hearing aids whitevoid realized a complete traid fair booth which included a 140″ backlit multitouch screen that we did the software for. In the projection little icons are floating around in bubbles that can be touched and dragged to a marked area. When released at that area detailed information concerning the selected item appeared.


photo: whitevoid

The multitouch surface was realized using the well known FTIR technique. One PC generated and projected the 3 consecutive images of 1400×1050 each. A second PC had two firewire cameras attached that saw the whole screen from the back, detected touches and sent that information to the first PC.


photo: whitevoid

The bubbles were lit by four point lights floating around in the water. By touching the surface you could catch their interest, so that at least one of them would come and look at what you are doing. As a special visual effect the whole surface behaved like a fluid, causing waves to expand from whereever touched with ones fingers.

During Development

These are screenshots from the development process of the bubble stream: