Dwin 2 Instructions d'exploitation télécharger pdf (Page 25)

Projectors with ﬁxed-pixel imaging arrays, such as DLP or LCD, are not

recommended for use with perforated screens. Perforated screens have

highly regular microscopic patterns that conﬂict with the equally uniform

pattern in the digital image array. This creates interference, a visual artifact

called a “moiré” pattern, which compromises picture quality.

To eliminate light spill, a black felt border is also recommended to enhance

the viewing experience.

A2. Screen “Gain”:

Projection screens do not generate light; they only reﬂect projected light.

Therefore screen gain refers to relative reﬂectance to a reference standard.

The most common reference standard is Magnesium Carbonate (MgCO3).

DWIN recommends a screen “gain” of 1 to 1.3.

A3. Screen Dimensions and Position

You should consult your authorized DWIN dealer or professional installer for

his or her recommendation. Most screen manufacturers and theater design

ers agree that screens should be installed to create a comfortable viewing

angle from a SEATED position. Here are some general guidelines:

• A screen should be wide enough to allow viewers to immerse themselves

in the program without having to move their heads from side to side. As

a rule of thumb, the viewing distance should not be less than two times

the screen width. For example, if your home theater has a 100-inch wide

screen you should have your seats installed no closer than 200-inches

from the screen.

• When specifying screen width, remember to allow enough space on the

wall for left and right front speakers, and for the screen to blend with

the aesthetics of your theater environment. Choose a dark, neutral color

(and matte, non-reﬂective) background wall surface. Bright wall colors or

reﬂective decorations can be distracting and could alter the appearance

of the image.

• A screen should be installed high enough to allow a comfortable view

ing angle for people sitting in the front row. Eye level (from the seated

position) should be approximately 1/3 of the screen’s height measured

from the bottom of the screen.

• Your Authorized DWIN Dealer or Custom Installer should be able to consider

all your home theater design needs and provide you with professional

recommendations to enhance your investment.

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Dwin 2 Instructions d'exploitation Page 25