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INSTALLATION AND SETUP
Even with all lighting removed it is still possible that room reflections within the room can slight-
ly degrade the image. Light from the projection screen should be absorbed by the ceilings, walls
and floors so that it will not be reflected back to the screen. Again, keep reflective surfaces to a
minimum.
Other Considerations
Here are some other considerations and tips which can help you improve your installation:
Ventilation is an important factor when preparing a projection room. The ambient temperature
should be kept constant and below 35°C (95°F). Keep the projector away from heating and/or
air conditioning vents. Changes in temperature can cause drifts in the projector circuitry that
may affect performance.
Keep the projector away from devices that radiate electromagnetic energy such as motors and
transformers. Common sources of these are slide projectors, speakers, power amplifiers, ele-
vators, etc.
For rear screen applications, less space is required if a mirror is used to fold the optical path.
Choose the right screen size for the application:
When laying out the projection room, consider positioning the projector and screen in a man-
ner that will achieve maximum audience coverage and space efficiency. For example, placing
the screen along the larger wall in a rectangular room will reduce audience coverage. Figure
2.4 shows two examples of how audience coverage is maximized.
As screen size increases, magnification increases and reduces brightness. Select a screen
size which is appropriate for the venue, but not larger than that required.
Installing a large screen in a small room is similar to watching television close up; too
large a screen can overpower a room. A good rule of thumb is to be no closer than 1.5
times the width of the screen.
Larger screens require greater attention to lighting conditions.
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