Turning Soap Film Into a Projector Screen 37
An anonymous reader writes "3 graduate students from University of Tokyo, Carnegie Mellon University, and the University of Tsukuba have developed a colloidal display — a clear projector screen that can control its transparency. Normally soap film will allow light to pass through, but the colloidal display does not. It mixes colloid into the solution and uses ultra sonic speakers to vibrate the surface of the soap film to achieve this. They have created several prototypes, such as 3D planar screen, to show how this technology can be useful."
Re:Gravity (Score:4, Interesting)
The bottom of the film could drain into a line that's pumped back to the top of the film. The device would maintain only the top and bottom edges, while the film would form between them. Since they're projecting ultrasound across the film's surface I expect they could run the hydraulics and ultrasonics there, too.