Barco ATLAS 67 CS4 User Manual page 24

3.1.1 Lamp Module
The lamp module generates the light for the subsequent projection. The lamp (100 Watt UHP (Ul-
tra High Performance) lamp) has an operation time of 8000 hours.
3.1.2 Illumination Unit
The illumination unit consists of the lens system for uniform illumination of the LCDs and the
electronics for lamp power supply and monitoring.
! Optical Integrator
An optical integrator consisting out of two multi-segment lenses guarantees a uniform illumi-
nation of the LCDs and thus of the screen.
3.1.3 Projection Unit
The light from the lamp is split with dichroic mirrors into red, green and blue light to illuminate
three LCD panels, each of which contains the respective color-information for the red, green and
blue parts of the projected image. The LCD panels are attached to a cubical prism called X Cube
which recombines the three light paths, so the image is projected using a single lens.
!
Poly-Silicon TFT-LCD
The LCD panels are based on Poly-Silicon technology. Poly-Silicon material consists of nu-
merous small crystals leading to small circuitry. The results are a big aperture (ratio of a pixel's
shutter area to it's total area), high speed and reliability. The panels have 1,310,720 (SXGA
1280×1024) pixels.
!
Lens System
The projection lens system is positioned behind the X Cube. It projects the image resulting on
the LCD's via the deflection mirror onto the rear of the screen module.
R5976255 A CS4 (2001-03)
TLAS
Lens
LCDs
Lamp
Integrator
X Cube
Mirror
3-panel Poly-Silicion LCD
Figure 3-2
3-6