The Conference Company - Medium

How to find the right screen for any presentation
The main considerations for choosing the
right screen are:
● the screen type
● the screen size
● the aspect ratio (width/height)
● the screen surface
● the projector
The Screen Type
Mobile or fixed? The broad MEDIUM product
range offers the correct screen solution for
any presentation requirement. Thanks to
their perfectly flat surfaces all screens
provide an excellent image performance.
The Screen Size
The general rule of thumb to determine
screen size is:
● the minimum distance from screen to the
front row of seats should be 1.5 times the
width of the screen
● the maximum distance for the audience
should not exceed 6 times the screen
width
● the lower border of the screen should be
90 - 120 cm above the floor (for seated
rows!)
The Aspect Ratio
Each projection method has its particular
ratio of width to height. The most common
ratios are:
Projection size W : H
Digital video projection 4 : 3
Widescreen projection (HDTV) 16 : 9
Overhead projection 1 : 1
Slide projection 3 : 2
Moreover, many MEDIUM screen types can
be adjusted to specific project or customer
requirements.
The appropriate screen for any presentation
The Screen Surface
The reflection quality of your screen is
defined by the brightness gain:
● The higher the brightness gain, the more
restricted the viewing angle
Different coatings of the screen surface
involve different reflective properties.
MEDIUM offer screens with two different
reflection properties.
Type D (d=diffuse) Screen Surfaces:
● scatter the light evenly in all directions
(horizontally and vertically)
● have a matt white surface
● provide good viewing angle conditions up
to 45° r/l of the projection axis and
acceptable conditions even up to 55-60°
● correspond to a measured brightness gain
factor of 1.0 - 1.2 (DIN 19045)
Type S (s=specular) Screen Surfaces
● reflect the light along the projection axis
twice as intensely as Type D screens
● have a pearl pigment coating
● provide excellent, very bright viewing
conditions up to 30-40° r/l of the
projection axis
● correspond to a measured brightness gain
factor from 1.8 - 2.4 (DIN 19045)
Roll down Tripod Fold Mobile Table top
Projection type Type D Type S Screen Screen Screen Screen Screen
Stationary use ● ● ● ● ● – –
Mobile use
Brighter room without
dimming / less
● ● – ● ● ● ●
powerful projector – ● ● ● – ● ●
Audience seated in centre
Darkened room/
– ● ● ● – ● ●
powerful projector ● – ● ● ● ● ●
Audience seated spread out ● – ● ● ● – ●
● recommended – not optimally suited
0% 10% 100%
Listen View
optimal information processing
The Screen Size
e Screen width
r Recommended height of lower screen edge
t Minimum distance: 1.5x the projection width
u Maximum distance: 6x the projection width
i Viewing angle of 45-50°
o Viewing angle of 30-40°
The Projector
Type D screens are mainly suited for medium
to high brightness projectors (2,000 ANSI
lumens and above) in rooms that can be
partially darkened. The projection surface
should not exceed approx. 5 m≈.
Type S screens achieve better results when
less bright projectors are used, in
environments with a high degree of ambient
light or when large screen surfaces are
required.
Reflection properties Type D/S
Brightness gain factor
2
1.5
1
0.5
50° 40° 30° 20° 10° 0° 10° 20° 30° 40° 50°
Viewing angle
Projector
● type S screen
● type D screen
● regular = standard white
Screen
● All MEDIUM screens are CE certified and
conform to DIN 19045,1-5 / DIN 4102 B2
technical standards.
● Please contact your local MEDIUM partner to
discuss your projection requirements and
solutions.
Screens
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