Sim2 Teatro 80 - Manual (Page 17)

16
TEATRO 80 - M80
ously adjust the picture size horizontally and vertically and
hence the aspect ratio.
The PULL DOWN menu, available for each aspect, permits you
to enable/disable the outlet to control the motorised curtains
used to block off the sides of 16:9 format projection screens
or the top and bottom of 4:3 format screens.
COLOUR TEMPERATURE
Changes the colour balance of the image.
It is possible to define the position of the primary colours (red,
green and blue) using 5 preset settings (Fig.22).
The default settings are:
NATIVE (the projector’s native primary colours)
HDTV, EBU, SMPTE-C, primary colours defined by the stan-
dards
AUTO, mode that applies one of the standard settings de-
scribed above.
PC, mode available only if the projector has received Colour
Temperature instructions by connection to a PC and using Live
Colours Calibration software.
If the default white settings are not sufficient, you can adjust
the white balance manually.
Colour temperature can be adjusted by positioning the white
point within the CIE chromaticity diagram. The system permits
you to place the white point inside a grid positioned in the neu-
tral colour zone. Moving along the horizontal lines changes the
related colour temperature, with low temperatures on the right
(thus increasing the red content) and high temperatures on the
left of the graph (thus increasing the blue content). Points along
the yellow horizontal line represent the white balances on the
black body curve. The colour temperature along the vertical
lines is constant even if it differs to a lesser or higher degree
from the black body curve. This means that by selecting the
points on the higher part of the graph you will increase the green
component. On the contrary, by selecting points in the lower
part of the graph, the purple component increases.
GAMMA CORRECTION
Determines the systems response to the grey scale, em-
phasising or attenuating the different grades of brightness
(blacks, dark, medium and light greys, whites) in the pro-
jected image.
The projector has a range of gamma functions which en-
able you to display any image to the best effect for the type
of video source, the ambient lighting and your subjective
preferences.
There are 3 sets of gamma curves: Standard (ST), Enhanced
SIM2 (EN) and Graphics (GR). The Standard curve has been
defined for general use, and is set for camcorders, digital
cameras, and for viewing films or photos from your PC. The
Enhanced set is suitable for watching movies. The Graphics
set is suited to displaying synthetic graphics (PC, CAD, PC
presentations, etc.).
By choosing User you can define your own curve. You can
thus select the coefficient which determines the curve. Co-
efficient values from 1.5 to 2.2 allow you to emphasise the
detail of dark images, while reducing overall contrast. Values
higher than 2.2 increase overall contrast, but reduce the
detail of dark areas. For the most common video sources,
if you set the parameter to 2.2, you will obtain pleasant and
well-contrasted images.
OVERSCAN
Eliminates irregularities around the outer borders of the
image.
Some less accurate sources may produce an image with
uneven borders; thanks to the overscan function these
imperfections can be moved outside the projected area.
For use of settings in the column "1 RGB", there are 9 avail-
able preset settings of the white balance.
The default settings are:
STANDARD applies a certain white balance depending on the
standard selected in column
“1 RGB” (Fig. 23)
HIGH - MEDIUM - LOW (default white balance levels);
NATIVE (the machines native white balance);
D75 - D65 - D50 - C standard CIE illuminants;
Fig. 22
Fig. 23
Native
HDTV
EBU
SMPTE-C
AUTO
PC
Standard
High
T= 7500 K White: x = 0,296
y = 0,325
Red: x = 0,653
y = 0,293
Green: x = 0,323
y = 0,653
Blue: x = 0,113
y = 0,033
= 0.009
Medium
Low
Native
D70
D65
D55
C
User
Image
1 R G B 2 White 3 Color Information
uv
Native
HDTV
EBU
SMPTE-C
AUTO
PC
Standard
High
x = 0,113
y = 0,033
T = 5500K
Medium
Low
Native
D75
D65
D50
C
User
= 0.009 uv
x
y
Image
1 R G B 2 White 3 Color Information
= 0.009
uv
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