Quato iColor Display 3.7 User manual

iColor Display 3.7
Intelli Proof Displays
Manual

Quatographic Technology GmbH
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About the manual

5
Contents • Introduction Page 06
• Colormanagement Basics Page 07
• Software/Driver Installation Page 14
• Hardware-Installation Page 18
Connection Layout Page 22
OSD Page 26
• Support Page 32
• Technische Daten Page 36
• Software-Installation (iColor) Page 60
• iColor Display 3 Software Page 48
Basics Page 48
Calibration Page 52
Saving the Prole Page 56
Test Page 57
UDACT Certication Page 57
SWOP Certication Page 58
Gamut Viewer Page 59
Prole Selection Page 60
Whitepoint Editor Page 60
Spotcolor Page 61
Lightbox Page 61

6
Dear Customer
In the past years, colormanagement made a big leap
forwards. In the day to day work in graphic arts and
industry, color is a central issue. More and more
tasks, previously performed by specialists, are now
performed by creative professionals. The prepress
area on the other hand is confronted with the rising
demands in case of speed and quality. The solution
for both parties is to harmonize color performance
and reproduction between all parts of the workflow.
That is the only way to ensure a consistent color
transformation from the creative professionals to
the nal print or product. The heart of this workow
is - of course - the monitor that acts as a creative
tool on the one hand and as a precise judgement
instance on the other hand. Photographers need an
exact color control in real-time, prepress professio-
nals demand a precise reproduction and simulation
of CMYK data while graphic designers want to judge
their spot colors on the screen.
Consequently, Quato offers solutions that match the
requirements of all the different users.
Introduction

7
Why colormanagement?
Every input or output device interprets colors in a
different way. This can be compared with the diffe-
rences in color perception between human beings,
as everyone has a different color perception and
„thinks“ colors different. This is because we all differ
in respect of social, cultural and even physical deve-
lopment.
In contrast to the human being, we are able to adjust
any device to behave exactly like or at least close to
a standard. Colormanagement and calibration are
the key technologies to achieve a streamlined color
reproduction.
The display is a vital part in this workflow as it is
used for both, the artist´s work and the color judge-
ment. In an ideal world, the display should be able
to simulate what is later printed by the printer and
shows the colors of the digital camera or scanner
the same way as these devices have recognized the
color. All this is only possible if a description of every
device is available - the color profile or ICC-profile.
Working spaces (standardized color environments)
make sure that colors can be transformed from one
device to another.
Environmental light
The human eye is heavily influenced by environ-
mental issues in the way that the surrounding light
changes the perception of colors. Thus, wrong
or insufficient environmental lighting is one of the
most problematic issues upon comparing softproofs
on a display with prints. The tonal response of a
print always depends on the light that is used to illu-
minate the viewing area. As lighting is crucial, meta-
meric effects will occur. The color rendering (and our
perception) will be different from the original. A red
could easily tend to be orange, or a blue looks much
less saturated just because of different light sources.
To ease the color communication, ISO 12647, ISO
12646 and 3664 define D50 as the standard lighting
for judging colors and proofs.
Companies like Just, GTI or VeriWide supply D50
light sources for proofing and press environments.
However, other 5.000K tubes (designed for plants for
example) or full-spectrum bulbs will most likely not
match the D50 standard and should not be used.
Introduction
INFO
ISO 3664 defines the requirement for the environmental light-
ing in the graphic industry:
The light source must match the D50 standard and needs a
rendering index (precision) of at least 90%. The light inten-
sity should match 2000 Lux (+/- 500) for press rooms and
450 Lux (approx. 140cd/m2) for prepress.
For a display for proof/print comparison, ISO 3664 and 12646
(Proofing Displays) define a working luminance for the display
of 120cd/m2 to 160cd/m2. A viewing booth therefore needs a
light intensity of 377 Lux to 503 Lux.
Four times the same image, but four times with a different color
interpretation, because four different devices are used with
colormanagement and calibration.
Different light creates different color rendering.

8
Color Difference
The human eye has a quite different sensitivity for
color difference between colors and grays. Plus, the
eye is a different sensitivity in different color regions.
In general, one can say, that color deviations can be
recognized from 3 ∆E on. With some colors, it will be
below ∆E 3, with some colors above this treshold.
Deviations in a gray balance or between grays are
already observed from 1 ∆E on. Deviations above 3-5
∆E (colors) and 1∆E (grays) are visible for the trained
eye.
Measurement Devices for Displays
There are two types of colour measuring instrument.
Colorimeters, as the name implies, see colors. A
colorimeter has sensors that, in much the same way
as the human eye, break the wavelengths of light
down into red, green and blue areas. Colorimeters
are most often used to measure the colour emitted
by displays. The second way to measure color is with
a spectrophotometer. A spectrophotometer can mea-
sure the wavelengths of light emitted from a light
source or reflected by an object. They are the best
way to measure colour. However, on displays, spec-
trophotometers suffer from poor precision in dark
areas. Here colorimeters are much better suited. On
the other hand, a colorimeter need to be trained on
a certain display type to be accurate. Therefore, a
device correction is needed for displays that differ
from the standard (like Wide Gamut or White-LED/
RGB-LED). A spectrophotometer does not need any
kind of training.
Display Basics
A display uses an additive color system where the
addition of red, green and blue results in white. So
far the theory. Unfortunately, the real world is diffe-
rent. With printers and the used subtractive system,
cyan, magenta and yellow should result in black.
However, the result is not a pure black, but some-
thing olive. That´s why we use blank ink in addition.
For displays, red, green and blue may result in some
kind of white, but at different luminance levels, their
behaviour is quite non-linear. Plus, a display is not a
pure additive system; it´s a bit more like a transmis-
sive system. The light from the back (either CCFL or
LED) passes the color filters and the TFT itself. In the-
ories, the secondary additive colors cyan, magenta
INFO
The deviation between two colors is expressed in Delta Error,
short DeltaE or ∆E. In most cases, a pure ∆E is based on the
1976 color difference formula based on the L*a*b* system.
The Quato software uses this standard DeltaE Lab or DeltaE
1976 formula. If other formulas (like ∆E 94 or ∆E 00) are used,
the Quato software expressively informs about this.
Additive colors (left) and subtractive colors (right). The primary
colors always mix to the secondary. And the secondaries of one
system are the primaries of the other one (and vice versa).

9
and yellow are the primary colors of the subtractive
system. So far the theory (again). In practice, a sub-
tractive cyan looks much different than an additive
cyan. And an additive red looks even more different
than a subtractive red.
However, to make sure that a display shows the right
white and the behaviour of all three channels at any
luminance is correct, a display needs to be adjusted.
Ways of Calibration
The color depth of a graphic signal from the compu-
ter to the display is 8bit - means 16.7 million colors
or 245 shades per channel. If this signal is changed,
the number of colors will be lower the bigger the
change will be. Therefore the best way is to avoid any
corrections of the signal. But as we have learned, a
display needs to be adjusted to show colors correct-
ly. That means the corrections have to be either done
in the displays or on the computer.
If the signal is corrected on the computer (in the
Look Up Table [LUT] of the graphics card), the signal
to the display does no longer contain the full 8bit
bandwidth. This will result in a loss of detail and
choppy gradiants. Up to 20% per channel or 50% of
all colors will be lost.
A better way is to correct as much as possible inside
the display and let only the remaining deviations be
corrected by the graphic card LUT. The loss can be
reduced to 10% per channel or 25% of all the colors.
However, the best way is to do all corrections inside
the display and also correct the non-linear behaviour
there. This will help to keep the full bandwidth. To do
so, a dedicated interface is needed to communicate
with the display. This approach is called hardware
calibration, while the first two ways are called soft-
ware calibration.
The hardware-calibrated Quato displays either use
USB or DDCI to communicate with the software on
the computer and adjust the displays internally with
up to 16bit precision. The high-precision LUT inside
the display is then used to correct all the deviations,
and the signal is downscaled to 10bit when it passes
the internal display driver circuits. The scaling can
be compared with high-end photography where
images are kept in 16bit mode until all corrections
have been done. Then, a scaling to 8bit shows no
Subtractive system (white) and additive system (black)
LUT correction on the graphic card (left) versus correction inside
the display LUT (right)
Calibration
Processor with
16 bit per Channel
Embedded RISC
MCU
16 bit C o lor-
manageme nt
Routines
USB Interface
16bit ProKanal
16 bit Red LUT
Image
Enhancement
Processor with
Frame Modulation
for 30bit
16 bit Green LUT
Lu m i n a n c e S t a b i l i s a t i o n
16 bit Blue LUT
16 bit on 16 bit Basis
Gamma Correction
Whitepoint
C o lor Correction
Feedback Channel
45min
Luminance
Luminance-
Stabilisation
Uniformity Circuit
with 1 40 Measu rements
Luminance Sensor
Uniformity Sensor
Temperature Sensor
�
DV I
30bit Output
Schematics of the process of a hardware calibration.

10
losses in comparison to make all adjustments in an
8bit image and having a lot of losses later.
Calibration Basics
Apart from the calibration technology, the calibration
setup is also quite important. The right values for
Luminance, Gamma (or Gradation or Tonal response)
and Whitepoint are not always easy to find.
Whitepoint
Of course, according to ISO 3664 and others, D50
is the right whitepoint. But this does not match for
screens. A display, calibrated to D50, will always
looks to warm compared to a D50 viewing booth.
Research has found that for paper type 1 (gloss or
matte coated offset), a whitepoint between 5.600 K
to 6.000 K should be used to simulate the D50 ap-
pearance on a screen. Other paper types may need
different whitepoints - pretty much depending on the
paper color.
As the display no longer uses D50, we have to apply
a chromatic adaption to comply to the ICC-standard
of D50.In fact, iColor Display automatically uses a
chromatic adaption if a whitepoint other than D50
is used for the calibration. The default adaption is
„Bradford“ as most image editing software makes
use of this adaption, too.
iColor Display offers some more adaptions like
vonKries, XYZ-scaling or Cat02/LMS. These adaption
should only be used if you need to comply to special
environments.
Gradation
The gradation or tonal response curce (TRC) is ano-
ther important part that needs to be adjusted cor-
rectly. Sometimes, one can find statements like „PC
uses Gamma 2.2 and Mac uses Gamma 1.8, and the-
refore the display has to calibrated to these values“.
This is wrong because the gradation (gamma is one
possible gradation) is not defined by the computer
platform but by the working space that is used in
Photoshop and Co. Only if you do basic colorma-
nagement task on operating system level, the stan-
dard gradation of the operating system counts. Here,
Windows XP/Vista/7 and Mac OS X 10.6 make use of
Gamma 2.2 while Mac OS X 10.5 or older use 1.8.
8bit signal after 16bit correction (left) versus the 8bit signal
after corrections in 8bit (right).
D50
D65
Tolerances for the whitepoint for paper type 1. The majority of
the probes is within the range of 5.600 to 6.000 K.
Without chromatic adaption, the display would render colors
much too cold (right). With adaption, the appearance (left)
looks like the original (top).
Comparison (from top to bottom) between L* , Gamma 2.2,
Gamma 1.8 and the TVI from ISOcoatedv2 shows that L* and
Gamma 1.8 match Offset printing quite well.

11
If you work with sRGB, then your gradation in the
calibration setup should be sRGB or at least Gamma
2.2 (right, sRGB is not exactly Gamma 2.2). If you
are using Adobe-RGB, then it should be Gamma 2.2;
with ECI-RGB 1.0 it is Gamma 1.8 and with ECI-RGB
2.0 it is L* gradation.
Note: Keep in mind that sRGB is not a very good idea
as a working space as it limits the input from larger
spaces (and the print to larger gamuts, too).
If there is a mismatch between the display´s gradati-
on and the one used in applications like Photoshop,
smooth gradiants will look choppy and many details
will be lost.
Luminance
ISO 12646 (minimum requirements for softproofing
displays) defines a luminance range of 120cd/m2 to
160cd/m2. The darker the environment, the lower
the brightness has to be within the defined range.
Keep in mind that driving a display at higher lumi-
nances than 160cd/m2 will result in a fast aging of
the backlight. The backligth decay is not covered by
any warranty. Therefore, please use the display at
the recommended luminance level.
Profile locations
Color profiles can be stored in many different loca-
tions on your harddrive. iColor Display always uses
the system´s native profile location.
Mac OS X stores profiles in the „ColorSync“ folder in-
side the system and the user library. To gain access
to these profiles for every user, the iColor Display
stores profiles always in the system library.
Macintosh HD -> Library -> ColorSync -> Profile
Windows stores color profiles in a subfolder inside
„System32“:
C:\WINDOWS\system32\spool\drivers\color

12
More Info
More info about calibration and how to set up the
applications can be found in the Softproofing Hand-
book, available on the website of the FOGRA.
http://forschung.fogra.org/index.php?getlang=en

13

14
Software installation for Intelli Proof Displays for
Windows XP 32 / Vista 32/64 / Windows 7 32/64
Insert the Quato-CD, start the Installer and select
your language.
The Installer copies the software and drivers onto
your harddisk.
C:\Programs\Quato\iColorDisplay
It also links the application to your start menu and
places a link on the desktop on request.
You can now connect the Quato display´s USB-port
and the measurement device to your computer. Win-
dows will note that new hardware was found. Please
follow the steps for your Windows version below.
Notice: Please make sure that you have administra-
tor rights for both, installation and iColor Display (to
successfully save profiles).
Installation for Windows XP 32
If Windows prompts with a question about automa-
tic driver search in the internet, just ignore this and
follow the steps below.
Now select that you would like to install the software
from another source.
Search the directory (see above) of the iColor Display
application, and select the „driver“ folder.
Windows possibly reports about a missing signature
of the driver. Just ignore this message.
Now Windows will tell you that the driver has been
installed correctly, and that your device is now ready
to use.
You can check the status of the device by using the
hardware manager. The display´s interface is called
„..Cp210x....“.
Please perform the installation of the measurement
device drivers in the same way as described above.
Notice: Windows XP 64 bit is not supported by the
driver or iColor Display application.
Software Installation for Calibra-
tion Software and Measurement
Devices

15
Installation for Windows Vista 32/64
If Windows prompts with a question about automa-
tic driver search in the internet, just ignore this and
follow the steps below.
Now select that you would like to install the software
from another source.
Search the directory (see above) of the iColor Display
application and select the „driver“ folder.
Windows possibly reports about a missing signature
of the driver. Just ignore this message.
Now Windows will tell you that the driver has been
installed correctly and that your device is now ready
to use.
You can check the status of the device by using the
hardware manager. The display´s interface is called
„..Cp210x....“.
Please perform the installation of the measurement
device drivers in the same way as described above.
Installation for Windows 7 32/64
If Windows prompts with a question about automa-
tic driver search in the internet, just ignore this and
follow the steps below.
Now select that you would like to install the software
from another source.
Search the directory (see above) of the iColor Display
application, and select the „driver“ folder.
Windows possibly reports about a missing signature
of the driver. Just ignore this message.
Now Windows will tell you that the driver has been
installed correctly, and that your device is now ready
to use.
You can check the status of the device by using the
hardware manager. The display´s interface is called
„..Cp210x....“.
Please perform the installation of the measurement
device drivers in the same way as described above.

16
Software installation for Intelli Proof displays for
Mac OS X
Please insert the CD and open the Disk Image
(.dmg). Copy the iColor Display folder to your hard-
disk.
The Version 3.8.x.x or newer of iColor Display does
not need a driver for the Intelli Proof calibration
interface.
If a driver from an earlier version is installed please
unistall this driver as below:
please remove the following entries from directory
MacintoshHD:\System\Libary\Extensions
SilabsUSBDriver.kext
SilabsUSBDriver64.kext
After removing a restart of your system is requiered.
You can check the status of the device with the Apple
System Profiler (About...-> more Info). The USB-Inter-
face shows up as „CP210x“ (Calibration Processor).
The measurement devices can be connected to your
Mac without installing a driver. iColor Display inclu-
des all necessary device frameworks.
Only for the Basiccolor Discus measurement device
a driver is necessary. It could be found in the iColor
Display.dmg, folder Drivers.
Notice: You need administrator rights to install the
driver. Saving profile in the ColorSync folder also
needs administrator rights.
Notice: If you have only obtained the iColor Display
Software without Display, skip the installation of the
hardware and just proceed to the introduction of the
software.

17

18
Unpacking Notice
Do not pull the display out of the box by pulling the
display itself. Always pull the cushion. Pulling the
display can result in pressure marks on the display
and would result in voiding any warranty claims.
Safety Notice
Before you lift or reposition your display, you may
need to disconnect cables and power cord. Use cor-
rect lifting techniques when positioning the display.
When lifting or carrying the display, hold it at the
edges. Don’t lift the display by the stand, the cord or
the display frame.
Disconnect the power cord to clean the screen on
your display. Use a soft, dry cloth to wipe dust from
the screen. Do not clean the screen with a cleaner
containing alcohol or acetone. Use a cleaner inten-
ded for use with a screen or display. Never spray
cleaner directly onto the screen. It might drip inside
the display and cause damage.
Even though the display has a power switch on the
back, the only way to completely disconnect power is
to unplug the power cord.
Disconnect power immediately if the power cord is
frayed or damaged, if something spilled on the dis-
play, or if the display has fallen down or is damaged
in some other way.
Use only the power cord that came with your display.
The power cord has a three-wire grounding plug (a
plug that has a third grounding pin) that fits only a
grounded AC outlet.
Ergonomics
Here are some guidelines for adjusting your display
to reduce glare and to accommodate your physical
size and shape.
Arrange the display so that the top of the screen is
slightly below your eye level when you are sitting at
Hardware Installation

19
the desk. The best distance from your eyes to the
screen is up to you, although most people prefer 45
to 70 cm.
Position the display by tilting it up or down to mini-
mize glare and reflections from overhead lights and
nearby windows.
Installation of the Hood
Assemble the three parts of the hood and place the
hood on the velcro strips of the screen. Please make
sure that the hood and the velcro on the screen are
properly aligned. You can bend the hood slightly to
make the mounting procedure a bit easier.
Mounting of the Sensor
To mount the optional measurement sensor (Silver
Haze Pro), use the velcro sling that is located on the
inner top of the hood. Make a sling and guide the
USB-cable through the sling. Then, fasten the sling
and mount it on the velcro in the inner top of the
hood as shown on the right side.
If you use other devices like the EyeOne Display or
the Datacolor Spyder 2/3, the velcro sling can also
be used.
If you want to use the EyeOne Pro spectrophotome-
ter, please also use the velcro sling but do not use
it as a sling. Simply guide the counter weight strip
of the EyeOne Pro between the two velcro parts and
mount the flattened sling on the velcro as shown on
the right side.
Always remove your sensor after calibration as the
units warm up significantly and this can reduce the
long and short term precision.

20
Connecting the Display to your Mac or PC
21.3“, 19“, 20.1“ units
Open the port-cover on the back and connect the vi-
deo cable, power supply cable and USB cable to the
display. Route the cables through the cable cabinet
in the display stand and connect them to your Mac
or PC.
Make sure that the USB cable or any measurement
device is connected directly to the computer to avoid
USB problems.
22“-26“ units
Connect the USB cable and video cable with your
Mac or PC and plug in the power cord.
Make sure that the USB cable or any measurment
device is connected directly to the computer to avoid
USB-issues.
Notice: Connect the USB cable or any measurement
device only after the software installation.
Notice: Only a digital connection (DCI, HDMI or Dis-
playPort) will allow a hardware calibration. If the dis-
play is connected via VGA (or the VGA part of DVI-I),
no hardware calibration will be performed.
Basics
TFTs need a warmup period. Do not calibrate or use
the display for color critical work in the first 60 minu-
tes. During this warmup period, gamma, whitepoint
and luminance shift and the internal stability circuit
will take command after 30 minutes.
Avoid activating the power saving as after waking
up, the display again needs at least 30 minutes to
return to working temperature and color stability. To
avoid image retention, make use of screen savers.
Connecting the display to a switched power outlet
Connection layout for 21.3”/20.1” (top), 19” (mid) and 22” to
26” (bottom) Quato displays.