TriLite has built a 3D screen works when the viewer is 10 to 70 meters away, making it perfect for billboard use. By also using high-powered lasers instead of the usual LED pixels, the screen is visible and readable even under intense sunlight.
TriLite told NY Magazine that their latest prototype is a 9-by-12 array the size of an A4 sheet and could be joined together up to whatever size. Each pixel in the sheet is capable of producing red, green or blue pixel to build an image.