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Consummate Performance and Functionality
Factory Adjustment of Gamma
The gamma level for
each ColorEdge monitor
is adjusted at the factory.
This is accomplished by
measuring the R, G, and
B gamma values from
0 – 255, then using the
monitor's 12-bit look-up
table (LUT) to select the
Each monitor adjusted individually at the
256 most appropriate
factory. (For illustrative purposes only. Actual
tones to achieve the
adjustment is performed in a darkroom.)
desired value.
This is important
Color Seepage
because accurate, non-
fluctuating gamma
values are necessary for
the proper display of
color. If colors are not
Ideal Gamma Curve
based on specific values
and cannot be adjusted,
Uncorrected
Gamma Curve
images will be displayed
differently by different
monitors. ColorEdge
monitors provide both
precision and con-
sistency, so graphics
professionals can be sure
that the final product
will look exactly the way
they want it to. In fact,
each monitor comes with
an adjustment certificate
that certifies the mea-
surement results of the
gamma value.
16-Bit Internal Processing
In any color-critical work, the monitor's ability to pro-
duce black is a great differentiator. With most LCD
monitors, the darkest area of the screen — or black
level — is usually too bright. This leads to banding and washing
out of dark grays and dark colors. With 16-bit internal processing,
ColorEdge monitors not only come very close to producing a true
black, but the lowest grayscale tones can be distinguished from one
another for a greater level of detail in dark areas.
16-bit v. 10-bit processing
Error Rate (%)
2
Internal 16-Bit Processing
1
0
-1
-2
-3
0
32
64
96
128
160
192
224
255
Tones (0 – 255)
With 10-bit processing, the error rate is high in low tonal areas during calcula-
tion. With 16-bit processing, accuracy is significantly improved resulting in
fewer conversion errors.
4
Gamma Correction
ON-SCREEN IMAGE
Tonality Breakup
Smooth Grayscale Display
GAMMA CURVE
Ideal Gamma Curve
256 Tones
256 Tones
Error Rate (%)
2
Internal 10-Bit Processing
1
0
-1
-2
-3
0
32
64
96
128
160
192
224
255
Tones (0 – 255)
Brightness and Color Uniformity with DUE
Fluctuations in brightness and chroma on different parts of the
screen are a common trait of LCD monitors. To counteract this,
EIZO incorporates a Digital Uniformity Equalizer (DUE) in all Col-
orEdge monitors. DUE utilizes the monitor's 12-bit look-up table
(LUT) with an extensive palette of 4,081 grayscale tones for each
R, G, and B, and internal calculation accuracy of 16 bits to ensure
a Delta-E difference of 3 or less across the screen when the monitor
leaves the factory.*
With Digital Uniformity Compensation
Without Digital Uniformity Compensation
Color-separated image with Delta-E*ab distribution across the screen of the
ColorEdge CG221 (gray level 128 measured)
*Delta-E difference for the CG303W is 5 or less along the screen perimeter.
Short- and Long-Term Brightness Stabilization
All models come with a brightness drift correction circuit that
stabilizes the monitor's brightness level right after starting up as
well as a backlight brightness sensor that detects and counteracts
brightness changes in the florescent backlight that occur over time.
Furthermore, the CG245W, CG243W, and CG223W incorporate
a temperature sensor that prevents changes in color temperature
which can be caused by fluctuations in the ambient temperature.
Brightness Drift
Temperature Drift
Correction
Compensation
Brightness (cd/m 2 )
ColorEdge
Preset Value
Without Brightness
Drift Correction
Minutes
3D LUT for Better Additive Color Mixture
All ColorEdge models
incorporate a look-up table
(LUT) for accurate color
and grayscale rendering, but
the ColorEdge CG245W,
CG243W, and CG223W uti-
lize a new EIZO-developed
3D LUT. Whereas a typical
1D LUT adjusts color on
separate tables for each red,
green, and blue, a 3D LUT
accomplishes this on a single, mixed-color cubic table. A 3D LUT
improves the monitor's additive color mixture (combination of
RGB), a key factor in its ability to display neutral gray tones.
Color temperature is maintained even as
surrounding temperature changes.
Color temperature changes with
fluctuation in surrounding temperature.
Cool
Surrounding temperature (°C)
Warm
R
B
G
3D LUT image
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