Water droplets create multilayered display - tech - 01 July 2010 - New Scientist

Water droplets create multilayered display - tech - 01 July 2010 - New Scientist: "Each screen is formed by water droplets falling from 50 stainless-steel needles. The needles release their droplets in unison, with 60 such lines created every second. A camera tracks their position and feeds the information to a projector, which illuminates them with pulses of light. The human eye integrates the information from several pulses to create the illusion of images moving on a floating screen."