LG patents a new projector-phone touch operation system

LG has filed a patent called “Mobile terminal with image projection”. It's a system that allows a gesture/touch user interface on a projected image. The idea is a system that identifies a pointer (finger), the shadow of the finger on the projected image and the distance between those two. When you touch something on the image, the distance is shorter - and thus you have a 'touch event'. Gesture interface is done similarly.

via UnwiredView