"Researchers at the Fraunhofer Institute for Silicon Technology in Germany are working on a tiny digital projector small enough to fit in a cell phone.
They've already built a functioning prototype based on a laser beam flashed at a tilting micromirror that builds up the picture at a resolution of 320 by 240 pixels line by line at high speed. The mirror measures just 1.5 millimeters in diameter, and could be mass-produced on a microchip."
