User`s manual
doc-3331-2 OverView cDG67-DL (August 2003) 2-2
2.1 Design
O
VERVIEW CDG67-DL is a modular rear projection system for the construction of large Display
Walls. The technologies used guarantee the best optical properties for high-quality presentation of
information with very simple integration into higher-level systems.
Technology
OVERVIEW CDG67-DL combines the latest modern projection technology with sophisticated elec-
tronics and solid mechanics. This design results in high image quality and reliability.
High, Constant Reading Accuracy over the Complete Display Panel
Optimally adjusted high-performance lens systems guarantee a distortion-free and sharp image.
Bright Displays
A 120W UHP™ lamp provides a high luminous flux, which is passed on at great efficiency by
the illumination system. (UHP is a trademark of Philips Electronics N.V.)
Dual Lamp System
The projection engines has a dual lamp system and can be operated in three operation modes:
hot standby, cold standby, auto switch mode.
In
hot standby both lamps are on. In case of a lamp failure, the light output of the other lamp is
immediately switched to illuminate the optics, and there is no noticeable effect on the dis-
played information: no loss of information, no impact on quality. Switching time is about half a
second.
In
cold standby mode the second lamp is only switched on in case a failure occurs with the ac-
tive lamp. Since the second lamp needs some minutes to reach a stable operating temperature,
at the beginning the display will have reduced brightness. The contents of information, how-
ever, is available nearly without any interrupt.
Auto switch mode is a special version of the cold standby mode: the lamps are active in turns:
every 500 hours the light path is illuminated by the other lamp. Since the lamp is switched on
some minutes in advance, the takeover of the second lamp is nearly not noticeable
High Contrast
The screen has a surface which absorbs ambient light falling on it and increases the contrast.
Electromagnetic Immunity
Because of the digital projection technologies and their direct digital control OVERVIEW
C
DG67-DL guarantees highest possible immunity against electromagnetic interference.
User Friendly
The rear panel of an OVERVIEW CDG67-DL projection cube gives free access to all control ele-
ments. The only maintenance work, i. e. replacing the filter pad and the lamps, can be done within
few seconds and makes no re-adjustment necessary.
Because of the digital projection technologies and their direct digital control, the display is largely
flicker-free and therefore ergonomic.
Environmentally Friendly
The burning life of the used 120 Watt lamps is very high at 6000 hours. This long lamp lifetime
and the low power consumption do not only reduce the cost of ownership but also contribute to
saving energy and natural resources.