User`s manual

2. Abbreviated summary
Barco - OverView D series - Doc-3353-2 - user's manual - Revision 05 - Aug 2005
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2.1 Design
OVERVIEW D 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.
Although different in screen size and resolution, the various members of the OverView D family all have the
same functionalities, with one exception: projection modules with SXGA+ resolution have two digital inputs, thus
providing redundancy options, cf. Source selection
Technology
O
VERVIEW D combines the latest modern projection technology with sophisticated electronics 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 UHP™ lamp provides a high luminous flux, which is passed on at great efficiency by the illumination sys-
tem. (UHP is a trademark of Philips Electronics N.V.). Depending on the requirements, the illumination unit
can be equipped with 100 W lamps or 120 W lamps.
• 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 immedi-
ately switched to illuminate the optics, and there is no noticeable effect on the displayed 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 active 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, however, is available nearly without any
interrupt.
Auto switch mode is a special version of the cold standby mode: the lamps are active in turns: after a de-
fined period, 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. The cycle time can be set between
12 hours and 500 hours.
• 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 O
VERVIEW D guarantees highest
possible immunity against electromagnetic interference.
User friendly
The rear panel of an O
VERVIEW projection cube gives free access to all control elements. 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 lamps is very high. 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.