Video projectors are getting so small that soon they will be practically invisible. The latest shrinkage has led to a projector that is about the size of a sugar cube. Earlier projectors were limited in their size by the ability to shrink the micro-array – the cluster of mirrors that make the projectors work. Researchers at the Fraunhofer Institute have replaced the micro-array with a single mirror which can rotate on two axes. If the technology proves effective it won’t be long until your phone and camera have projectors built into them.