Christie HAL Series User Manual page 10

Even with all lighting removed it is still possible that room reflections within the
room can 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, reflective surfaces should be kept to a minimum.

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 which may affect
performance.
•
Keep the projector away from devices which radiate electromagnetic energy
such as motors and transformers. Common sources of these are slide
projectors, speakers, power amplifiers, elevators, 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:
◊
As screen size increases, magnification increases which 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.
•
When laying out the projection room, consider positioning the projector and
screen in a manner which 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 2-8 shows two
examples of how audience coverage is maximized.
•
Keep in mind that for good display of text information, the image size must
allow the audience to distinguish all text clearly. In general, the eye can
Figure 2-7. Better Screen Placement
INSTALLATION & SETUP
DLV 1280
User's Manual
2-7