If you've ever been to an amusement park, you may have noticed ride designers using some non-traditional platforms as projection screens - the most common example being a steady stream of artificial fog. Projecting onto transparent substances is a different story, however, which made this latest technique a bit baffling to say the least. Colloidal Display, developed by Yoichi Ochiai, Alexis Oyama and Keisuke Toyoshima, uses bubbles as an incredibly thin projection "screen," regulating the substance's properties, such as reflectance, using ultrasonic sound waves from a nearby speaker.
Engadget , Colloidal Display uses soap bubbles, ultrasonic waves to form a projection screen (hands-on video), Colloidal Display uses soap bubbles, ultrasonic waves to form a projection screen (hands-on video)
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