Micromirror device
Encyclopedia
Micromirror devices are devices based on microscopically small mirrors. The mirrors are Microelectromechanical systems
(MEMS), which means that their states are controlled by applying a voltage between the two electrodes around the mirror arrays. There are digital micromirror devices used in video projectors and optics and micromirror devices for light deflection and control.
Digital Micromirror Devices (DMD) were invented by Texas Instruments in 1987 and are the core of the DLP technology used for video projection. The mirrors are arranged in a matrix and have two states, "on" or "off" (digital). In the on state, light from the projector bulb is reflected into the lens making the pixel appear bright on the screen. In the off state, the light is directed elsewhere (usually onto a heatsink), making the pixel appear dark. Colours could be produced by various technologies like different light sources or gratings.
. The power and direction of the incident light is determined by the mirrors state, which itself is controlled electrostatically.
Microelectromechanical systems
Microelectromechanical systems is the technology of very small mechanical devices driven by electricity; it merges at the nano-scale into nanoelectromechanical systems and nanotechnology...
(MEMS), which means that their states are controlled by applying a voltage between the two electrodes around the mirror arrays. There are digital micromirror devices used in video projectors and optics and micromirror devices for light deflection and control.
Digital Micromirror Devices
→ See main article digital micromirror deviceDigital micromirror device
A digital micromirror device, or DMD, is an optical semiconductor that is the core of DLP projection technology, and was invented by Dr. Larry Hornbeck and Dr. William E. "Ed" Nelson of Texas Instruments in 1987....
Digital Micromirror Devices (DMD) were invented by Texas Instruments in 1987 and are the core of the DLP technology used for video projection. The mirrors are arranged in a matrix and have two states, "on" or "off" (digital). In the on state, light from the projector bulb is reflected into the lens making the pixel appear bright on the screen. In the off state, the light is directed elsewhere (usually onto a heatsink), making the pixel appear dark. Colours could be produced by various technologies like different light sources or gratings.
Light Deflection and Control
The mirrors could not only be switched between two states, their rotation is in fact continuous. This could be used for controlling the intensity and direction of incident light. One future application is controlling the light in buildings, based on micromirrors between the two panes of Insulated glazingInsulated glazing
Insulated glazing also known as double glazing are double or triple glass window panes separated by an air or other gas filled space to reduce heat transfer across a part of the building envelope....
. The power and direction of the incident light is determined by the mirrors state, which itself is controlled electrostatically.