Reflecta Cinehome screen 203 x 152 82512 User Manual

B A S I C S

If you want to present pictures or information to

an audience, be it in the private or business

sector, a perfect presentation is indispensable.

However, this can be achieved only if projec-

tion device and screen match each other. A slide

projector, e.g., needs a different screen than a

beamer. Before purchasing a screen, you should

therefore think carefully about the intended pur-

pose.

In the private sector, different factors are

decisive than when used in the business world.

When used at home, the pure pleasure of wat-

ching the presentation is in the foreground; when

the screen is not required, it should be hidden

unobtrusively. In the business area, a stable

design to withstand daily use and versatile appli-

cations is required.

In order to view a projected picture, the picture

must have a certain brightness. This brightness,

of course, depends on the light in the room, and

the picture must be brighter than the surroun-

ding light. It is also clear that in bright rooms,

the pictures must be proportionately brighter

than in dark rooms.

A decisive parameter of all projectors is their

light intensity. For multimedia projectors, this

intensity is measured in lumen, where the stan-

dard of the American National Standard Institute

(ANSI) is applied frequently.

The larger the projection surface, the lower

the amount of light per surface unit since projec-

tors – irrespective of the size of a picture –

always produce the same amount of light.

part from light intensity, the contrast value is

an essential factor which influences the quality of

the projected image. The contrast value indicates

the ability of a projector to reflect a scale of sha-

des as wide as possible in their colour intensity

from the darkest to the brightest shade as in real

life. A high contrast will produce a natural, vivid

image.

Hence, luminous efficacy and contrast value

must match the brightness of the ambient light

and the characteristics of the projection screen

to produce a perfect image.

The ratio between the brightness of the pro-

jector and that of the projected image should be

5:1 as a minimum to achieve the best image qua-

lity.

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