(Texas Instruments Inc.) Digital Micromirror Device. A silicon CMOS integrated circuit used to modulate light in a wide variety of applications. The most common use is in digital projection systems where one or more devices are used to create high quality color images.
The device is a memory circuit whose elements are arranged in a display format array matrix. Each element has a minute square hinged aluminum mirror on its front which can tilt about its diagonal axis. The electrical charge in the memory cell causes the mirror to deflect from one tilt position to the other. By changing the memory data, the mirror can be switched very rapidly (about 15kHz) to create pulses of light whose duration causes the pixel to appear at a particular brightness, so producing the display of gray scales. DMDs are produced at different sizes according to the resolution required. The smallest contains over 500,000 mirrors. Devices for 2K (2048 x 1080) and 4K (4096 x 2160) DCI formats are widely used in digital cinema projectors as well as in home cinemas.
See also: DLP