Optical
dimmer
Intracube
uniformity
Dynamic
color
feedback
Images brought to
life
Barco’s OV-D2 video wall series builds on a revolutionary display
solution that offers operators the most razor sharp and life like
images available on a projection screen today. DLP is an innova-
tive display solution that uses an optical semi conductor to
manipulate light digitally. The result is maximum fidelity, with
images whose accuracy, brightness and color must be seen to
be believed.
The semiconductor
At the heart of every DLP projection
system is an optical semiconductor
known as the Digital Micromirror
Device, or DMD chip. When a DMD chip
is coordinated with a digital video or
graphic signal, a light source, and a pro-
jection lens, its mirrors can reflect an
all-digital image onto a screen. The
DMD and the electronics that surround
it are referred to as DLP technology.
The grayscale image
A DMD panel’s Micromirrors are mount-
ed on tiny hinges that enable them to
tilt either toward the light source in a
DLP projection system (ON) or away
from it (OFF) – creating a light or dark
pixel on the projection surface. The bit-
streamed image code entering the
semiconductor directs each mirror to
switch on and off up to several thou-
sand times per second. When a mirror
remains on average longer in the on
state than in the off state, it introduces
a light gray pixel. If the off state domi-
nates, a dark gray pixel is projected.
This way, the mirrors in a DLP projection
system can reflect pixels in up to 1,024
shades of gray to convert the video or
graphic signal entering the DMD into a
highly detailed grayscale image.
Adding color
The white light generated by the lamp
in a DLP projection system passes
through a color wheel as it travels to
the surface of the DMD panel. The color
wheel filters the light into red, green,
and blue, from which a single -chip DLP
projection system can create at least
16.7 million colors.
OV-D2 uses the latest DMD technology
with increased switching speed of the
mirrors to deliver better video perform-
ance without contouring artifacts.
Brightness lock
Adding color
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