4
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 16-bit look-up
table (LUT) to select the
256 most appropriate
tones to achieve the
desired value.
This is important
because accurate, non-
fluctuating gamma
values are necessary for
the proper display of
color. If colors are not
based on specific values
and cannot be adjusted,
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.
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 16-bit look-up table
(LUT) with an extensive palette of 65,281 grayscale tones for each
R, G, and B to ensure a Delta-E difference of 3 or less across the
screen when the monitor leaves the factory.*
*Delta-E difference for the CG303W is 5 or less along the screen perimeter.
Uncorrected
Gamma Curve
Ideal Gamma Curve
ON-SCREEN IMAGE
GAMMA CURVE
Brightness
Brightness
256 Tones
256 Tones
Color Seepage
Tonality Breakup
Smooth Grayscale Display
Ideal Gamma Curve
Gamma Correction
16-Bit LUT, 10-Bit Simultaneous Display
Most ColorEdge monitors offer 10-bit simultaneous color display*
from a 16-bit look-up table which means they can show more than
one billion colors simultaneously. This is 64 times as many colors as
you get with 8-bit display which results in even smoother color gra-
dations and reduced Delta-E between two adjacent colors.
*A graphics board and soft ware which support 10-bit output are also necessary
for 10-bit display.
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 CG275W,
CG245W, CG243W, and
CG223W utilize an 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 (combina-
tion of RGB), a key factor in its ability to display neutral gray tones.
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 coun-
teracts brightness changes in the florescent backlight that occur
over time. Furthermore, the CG275W, CG245W, CG243W, and
CG223W incorporate a temperature sensor that prevents changes
in color temperature which can be caused by fluctuations in the
ambient temperature.
Each monitor adjusted individually at the
factory. (For illustrative purposes only. Actual
adjustment is performed in a darkroom.)
Consummate Performance and Functionality
Color-separated image with Delta-E*ab distribution across the screen of the
ColorEdge CG221 (gray level 128 measured)
With Digital Uniformity Compensation Without Digital Uniformity Compensation
R
G
B
3D LUT image
With
compensation
Color temperature is maintained even as
surrounding temperature changes.
Color temperature changes with
fluctuation in surrounding temperature.
Cool
Surrounding temperature (°C)
Warm
Without
compensation
Preset Value
ColorEdge
Without Brightness
Drift Correction
Brightness (cd/m2)
Minutes
Brightness Drift
Correction
Temperature Drift
Compensation
8-bit and 10-bit image display
ColorEdge
8-bit display
ColorEdge
10-bit display
Input
Output
Internal processing
Typical
Monitor
8-bit display
8 bit
8 bit
8 bit
8 bit
16-bit
LUT
10 bit
10 bit
16-bit
LUT
