A technology available (until the patents run out, it seems) only from Texas Instruments. This is used in DLP projectors and controls the transmission of light by means of hundreds of thousands of microscopic mirrors on its surface which physically swing through ten or twelve degrees in accordance with the signal. They come in a range of resolutions, from SVGA (800 by 600) through XGA (1,024 by 768) in the 4:3 aspect ratio, and 1,024 by 576 (woo hoo! A real PAL-optimised one!) to 1,280 by 720 in the latest Mustang HD2 DMD.