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3D LUT
CG232W · CG242W
All ColorEdge models incorporate
a look-up table (LUT) for accurate
color and grayscale rendering, but the
ColorEdge CG232W and CG242W
utilize a new EIZO-developed 3D LUT.
While a typical 1D LUT adjusts color
on separate tables for each of red, green,
and blue, a 3D LUT accomplishes this using a single, mixed-color
cubic table. This improves the monitor’s additive color mixture
(combination of RGB), a key factor in its ability to display neutral
gray tones.
Short- and Long-Term Brightness Stabilization
CG232W · CG242W · CG301W
Stable brightness is a key factor in
achieving accurate color. However,
fluctuations in backlight brightness
normally occur from startup and can
last for up to two hours. Furthermore,
changes in ambient temperature can
cause brightness levels to fluctuate,
as can the inevitable deterioration of
the backlight’s fluorescent lamp over
time. An EIZO patented backlight sensor detects and counteracts
these influences so brightness is always stable and product life is
extended.
Factory Adjustment of Gamma
CG232W · CG242W · CG301W
Gamma level
for each Col-
orEdge 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
(4,081 tones per
RGB) to select the 256 most appropriate tones to achieve the desired
value. Each monitor comes with an adjustment data sheet that certi-
fies the mea surement results of the gamma value.
Accurate Hardware Calibration
CG232W · CG242W · CG301W
There are two kinds of monitor calibration — software and
hardware. With software calibration, colors are adjusted by
manip ulating the graphics board’s color output, which results in
fewer displayable colors. With hardware calibration, colors are
adjusted within the monitor itself, so there is no loss of displayable
colors. These ColorEdge monitors and the bundled ColorNaviga-
tor soft ware offer hardware calibration for accurate and consis-
tent color.
16-Bit Internal Processing
CG232W · CG242W · CG301W
In any color-critical work, the monitor’s ability to produce
black is a great differentiator. With most LCD monitors, the dark-
est 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, these ColorEdge moni-
tors 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.
Brightness and Color Uniformity with DUE
CG232W · CG242W · CG301W
Brightness and chroma uniformity errors are character-
istic of all LCD panels. To counteract this, EIZO has
equipped these ColorEdge monitors with its latest inte-
grated circuit. This circuit features a Digital Uniformity Equal izer
(DUE) function. DUE compensates brightness and chroma based
on data measured at our factory so that the entire screen will be
almost uniform at each gray level from 0 to 255. A certificate
indicating the unifor mity compensation results is packaged with
each monitor.
Uncorrected
Gamma Curve
Ideal Gamma Curve
ON-SCREEN IMAGE
GAMMA CURVE
Brightness
Brightness
256 Tones256 Tones
Color Seepage To nality Breakup Smooth Grayscale Display
Ideal Gamma Curve
Gamma Correction
Software calibration Hardware calibration
Graphics board on computer adjusted
(8 bits for each color)
Grayscale
tones lost
Monitor look-up table adjusted
(12 bits for each color)
Smooth
gradation
maintained
Color-separated image with Delta-E*ab distribution across the screen on the
CG232W (gray level 128 measured).
With Digital Uniformity Equalizer
Without Digital Uniformity Equalizer
16-bit v. 10-bit processing
Error Rate (%)
0
2
1
0
-1
-2
-3
2
1
0
-1
-2
-3
32 64 96 160 192 224 255128 0326496 160 192 224 255128
Error Rate (%)
Internal 16-Bit Processing Internal 10-Bit Processing
To nes (0 – 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.
3D LUT image
Brightness (cd/m
2
)
Minutes
Preset Value
ColorEdge
Without Brightness
Drift Correction