Download Users Manual - About Projectors

Advanced User Information
LBV00056; Revision A - 23/08/99
DMDª Operation and Usage
A DMD™ (Digital Micromirror Device™) is a true digital light modulator and
utilises 1,310,720 moving aluminium mirrors, with each one representing a pixel in
the final projected image. Each mirror is suspended over address electrodes by a
torsion hinge between two posts. Depending on the voltage polarity applied, each
mirror will either tilt to left or to the right. When light is applied to the complete
DMD™, only the light redirected from a mirror tilting to the left is projected.
Support Posts
Projection Lens
Torsion Hinge
Illumination
(Lamp)
Left
Tilt
Light
Dump
Flat
Right
Tilt
Offset Address Electrode
Mirror Element
Left Tilt
Right Tilt
ADVANCED
The projector optically filters white light from the lamp into its constituent red,
green and blue. Each colour illuminates a separate DMD™ whose modulated output
is then recombined with the other two to form the projected full colour image.
Projector
Lamp
Optical Filtering of White Light
into Red, Green and Blue Light
White Light
White Light
Blue
Light
RGB
Projector
Lens
Green
Light
RGB
Red
Light
RGB
DMDs™
DÑ2
Full Colour Image
Displayed on Screen