Dmd™ Operation And Usage - Digital Projection LIGHTNING 8gv User Manual

Advanced User Information
DMD™ Operation and Usage
A DMD™ (Digital Micromirror Device™) is a true digital light modulator and it
utilises 786,432 (LIGHTNING gv models) or 1,310,720 (LIGHTNING sx mod-
els) moving aluminium mirrors, with each one representing a pixel in the final pro-
jected 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
Offset Address Electrode
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
D—2
Torsion Hinge
Mirror Element
Optical Filtering of White Light
into Red, Green and Blue Light
White Light
Blue Green
Light Light
RGB RGB
LBV00056; Revision C - 01/03/03
Projection Lens
Illumination
(Lamp)
Left Tilt
Projector
Lens
White Light
Red
Light
RGB
DMDs™
Left Light
Tilt Dump
Flat
Right
Tilt
Right Tilt
Full Colour Image
Displayed on Screen