Legamaster 7-164200 ユーザーズマニュアル
8 6
3
STEP 3: SCREEN DIMENSIONS
1:1
4:3
16:9
width =
height
4:3 width =
1.33 x height
16:9 width =
1.78 x height
The 4 steps
1
2
There are three types of projection screens:
• electrically operated projection screen
• manually operated projection screen
• portable projection screen
A portable projection screen is the best choice if a
variety of locations are to be used for projection.
If the projection room is permanent however, then
you may choose from an electrical- or manual
operated, depending on your personal preference
and budget.
For special projection solutions, such as interactive
projection, see page 112.
Depending on the projection method to be used,
the projected image will have a certain width /
height relationship. For the best results, it is
advisable to select a projection screen with the
same ratio as that of the projected image.
In general terms, a distinction may be made
between the following aspect ratios:
The dimensions and hanging position of the
projection screen are determined by the
following guidelines:
Dimensions of the projection screen
Height (X) of the projection screen
=
1/6 of the distance from the projection screen
to the last row of chairs
width of the projection screen =
Optimum viewing height
For the following types of use, the most
optimum distance from the bottom of the
projection screen to the floor is:
Professional use = minimum 125 cm
Home Cinema use = minimum 60-90 cm
Minimum viewing distance
The optimum perception of the projected image
is determined by:
Distance to the first (D) row of audience
=
diagonal (D) dimension of the screen
STEP 1: SCREEN TYPE
STEP 2: ASPECT RATIO
The next 4 steps provide you with the most important selection criteria which
will help you to choose the right projection screen, while taking your specific
circumstances and needs into account.
will help you to choose the right projection screen, while taking your specific
circumstances and needs into account.
Standard
Video
HDTV
1:1
4:3
16:9
T
H E
4
S T E P S
PROJECTION