Projector placement
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Projector placement
In the following sections guidelines for finding the values for best placement of the projector is presented. Also see the projector manual and
observe the lens choices possible.
Projector placement
The following must be decided for: a
screen size
taking the
viewing distance
and the
throw distance
into consideration.
Once the projector and the screen are placed, the fine adjustments of the picture can be made.
Note:
Do not use the electronic key stone adjustment as it will decrease your picture quality radically.
Finding the correct screen size taking the viewing distance into consideration
Finding the correct viewing distance is
the first and most important task. If the
viewing distance is too short, the
customer will experience the projected
image as un-sharp and blurred and will
possibly be able to see the pixel structure.
If the viewing distance is too long the
customer will loose details, and will not
get the wanted “big screen” experience.
The viewing distance is found in the table
below.
Example:
Picture material
Diagonal screen size (inches) - 16:9 aspect ratio
50”
62”
72”
82”
92”
100”
110”
120”
Description
Vertical resolution (lines)
Optimum viewing distance (metres)
Standard definition (NTSC)
480
4.5 m
5.8 m
6.4 m
7.3 m
8.2 m
8.9 m 9.8 m 10.7 m
Standard definition (PAL)
576
3.7 m
4.8 m
5.4 m
6.1 m
6.8 m
7.4 m 8.2 m
8.9 m
High definition (HD)
720
3.0 m
3.9 m
4.3 m
4.9 m
5.5 m
5.9 m 6.5 m
7.1 m
Full high definition (FHD) on FHD screen
1080
2.0 m
2.6 m
2.9 m
3.3 m
3.6 m
4.0 m 4.4 m
4.8 m
Full high definition (FHD) 3D TV on FHD screen
1080
1.5 m
2.0 m
2.2 m
2.5 m
2.8 m
3.1 m 3.4 m
3.7 m
Max.
Max.
Too long viewing distance
Too short viewing distance
Perceived picture quality
Optimum
Screen height = X
