C3X1080
ENGLISH
14
POSITION
Use this adjustment to position the image vertically and
horizontally. It determines the aspect ratio of the projected
image.
These parameters do not normally require adjustment
because the system checks the input signal and auto-
matically sets the most suitable values. However, if the
image is not perfectly centralised it may prove useful to
request the system to repeat the input signal analysis and
image positioning, by requesting the automatic control
procedure with button A on the remote control or the AUTO
button on the keypad. When this procedure is requested, it
is helpful to project a picture with a white or light-coloured
background on the screen.
fREQUENCY/PhASE
These adjustments, available for progressive signals and for
signals from a PC, ensure correspondence between the
number of pixels making up the signal and the number
of pixels that make up the projected image.
These parameters do not normally require adjustment
The default settings are:
STANDARD applies a certain white balance depending on
the standard selected in column “
1 RgB
”;
HIGH - MEDIUM - LOW (default white balance levels);
NATIVE (the projector’s native white balance);
D75 - D65 - D50 - C standard CIE illuminants;
If the default white balance 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 neutral 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 colours on the black body
curve. The colour temperature along the vertical lines is
constant but 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 blue
content. On the contrary, by selecting points in the lower
part of the graph, you will increase the purple content.
gAMMA CORRECTION
Determines the systems response to the grey scale, em-
phasising or attenuating the different grades of brightness
(blacks, dark, medium, light greys, whites) in the projected
image.
The projector has a range of gamma functions which
enable 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), En-
hanced SIM2 (EN) and Graphics (GR). The Standard curve
has been defined for general use, and is set for video
cameras, 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 desktop, CAD, PC presentations, etc.).
By selecting User you can define your own curve. You can
thus select the coefficient which determines the curve.
Values from 1.5 to 2.2 allow you to emphasise the detail
of dark images, but reduce overall contrast. Values higher
than 2.2 increase overall contrast, but reduce the detail
of dark areas. For the most common video sources, by
setting the value to 2.2 you can achieve pleasant and
well-contrasting images.
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
ST1
For general use
EN1
Suitable for displaying images from video
cameras, digital cameras or TV studios in high
ambient light.
EN2
Suitable for displaying images from video
cameras, digital cameras or TV studios in low
ambient light.
EN3
Suitable for projecting films in high ambient
light.
EN4
Suitable for projecting films in moderate am-
bient light.
EN5
Suitable for projecting films in controlled am-
bient light.
GR1
Suitable for displaying graphic images (e.g.
Windows desktop) in moderate ambient
light.
GR2
Suitable for displaying graphic images in
controlled light.
USER
Permits users to define the curve by setting
the parameters.
g
amma functions
Standard
g
amma functions
Enhanced SIM2
g
amma functions
g
raphics
User
Fig.24
