A1: At the heart of every DLP™ projection system is an optical semiconductor known as the Digital Micromirror Device, or DMD chip. The DMD chip is probably the world's most sophisticated light switch. It contains a rectangular array of up to 1.3 million hinge-mounted microscopic mirrors; each of these micro-mirrors measures less than one-fifth the width of a human hair. When a DMD chip is coordinated with a digital video or graphic signal, a light source, and a projection lens, its mirrors can reflect an all-digital image onto a screen or other surface. The DMD and the sophisticated electronics that surround it are what we call Digital Light Processing™ (abbreviated DLP™) technology.