Barco 7QP, User Manual

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3. Installation guidelines
Which screen type ?
There are two major categories of screens used for projection equipment. Those used for front projected images and those for rear
projection applications. Screens are rated by how much light they re
fl ect (or transmit in the case of rear projection systems) given a
determined amount of light projected toward them. The ‘GAIN’ of a screen is the term used. Front and rear screens are both rated
in terms of gain. The gain of screens range from a white matte screen with a gain of 1 (x1) to a brushed aluminized screen with a
gain of 10 (x10) or more. The choice between higher and lower gain screens is largely a matter of personal preference and another
consideration called the Viewing angle. In considering the type of screen to choose, determine where the viewers will be located
and go for the highest gain screen possible. A high gain screen will provide a brighter picture but reduce the viewing angle. For
more information about screens, contact your local screen supplier.
Image size
The projector is designed for projecting an image size with a screen width from 1.00 m (3.3 ft) to 6 m (19.7 ft) with an aspect ratio of
4 to 3.
Image retention
Image retention can affect LCOS projectors, in extreme cases, permanent “burn” can occur if still/repetitive images are left on the
screen for long periods of time. Such damage to the panels is NOT covered by warranty.
Please ensure that the following precautions are taken to avoid this phenomenon :
1.
Use a screensaver (that moves)
2. Periodically change/alter any background images
3. Turn off the projector when not in use
Running cycle
To come to an acceptable lifetime for both lamps and panels it is necessary to turn off the projector once a day for at least one hour.
In doing so the lifetime will increase considerably. However, the more time the projector is powered down each day, the better the
panels can recover and the longer they will last.
16 R59770330 SIM 7QP SERIES 07/10/2013