Procolor Pro-Screen 095140 Manual Do Utilizador

max. 125 cm
min. 90 cm

   4:3 

max. 5 x h

 16:9 

max. 3,3 x h

CHOOSING YOUR SCREEN
Four steps to make the right choice!

Three elements are used to determine the ideal dimensions of a projection screen:

1. The width of the screen

a. For an optimal image, the viewing distance should be at least equal to 
the diagonal (D) of the screen.

Formula to calculate the width of the screen from the diagonal:
D x 0.80 = width of screen (format       ) or D x 0.872 = width of screen (         format) 

2. Determining the image height

a. For video screen        format, the last row should be placed at a maximum distance equal 
to 5 times the height of the projected image (H) to obtain an ideal image.

Formula to calculate the        screen size from the width: (W x 3)÷4
b. For          format, the maximum distance is 3.3 times the height of the projected image (H).

Formula to calculate the          screen size from the width: (W x 9)÷16

3. The available space (wall), where the projection screen is to be mounted, is also an important factor.

step 1: electrical projection screen with matte white fabric

step 2: video format (ratio       )

step 3: dimensions of the projection wall: 400 x 280 cm (width x height).

The 1

st 

row of spectators is 3 m from the projection wall and the last row is 4.5 m away.

a. The minimum viewing distance is therefore 300 cm = Diagonal
b. Width of screen: 300 x 0.80 = 240 cm, ideal screen width
c. Minimum image height (H) depending on the row furthest from 
the projection screen: 450 cm ÷ 5 = 90 cm
The image height will therefore be min. 90 cm.
d. To calculate the image height from the screen width in       format: (240x3) ÷ 4=180 cm

Here is another practical tool to help you

choose the number of ANSI-Lumen (luminosity)
required for your projector:
Surface area of the projection screen in m

2

x 400

(Lux) = Minimum quantity of ANSI-Lumen.

EXAMPLE:
If you choose a projection screen of 160x120cm
(surface area 2 m

2

), your projector should provide

at least 800 ANSI-Lumen in “normal” ambient 
light conditions.

PRODUCTS CATALOGUE I 5