Sony LMD1751WCC Brochure page 14

LMD Series Technology & features
10-bit Signal Processing
LMD-51
All LMD Series monitors, from the high-grade LMD-51 Series
to the entry-level LMD-30/10 Series, incorporate high-purity
RGB color fi lters and a 10-bit signal processing engine to offer
stunning 109% peak white reproduction without clipping and
a smooth gray scale along CRT-like gamma.
ChromaTRU Color
Processing
For an extra level of color-reproduction accuracy, every
LCD panel used in LMD-51 Series and LMD-40/41 Series
monitors is precisely color calibrated at the factory, providing
characteristics consistent with those of CRT displays.
The colorimetry of an LCD display, by nature, can exhibit
inaccurate R, G, B color coordinates and unbalanced R, G,
B gamma curves, which can make precise color matching
between multiple monitors a challenge. These are also the
primary reasons why LCD color tone can differ slightly from
CRT tone. LMD-51 Series and LMD-40/41 Series monitors
solve this problem by precisely calibrating each LCD panel's
light output so that the R, G, B color coordinates are virtually
the same as those of a CRT monitor. A second calibration
is further applied so that white balance is maintained at a
consistent color temperature throughout all gray scale levels.
The result of these precise calibrations is color reproduction
reminiscent of the Sony CRT displays.
White Balance Calibration Function
LMD-51 Series and LMD-40/41 Series monitors are adjusted
at the factory to achieve optimized color, brightness, and
gamma prior to shipment. LCD monitor performance,
however, typically changes over time and requires regular
recalibration to maintain its original performance.
These monitors employ a software-based white balance
calibration function, which is called LMD_AutoWhiteBalance.
Combined with a PC and commercially available calibration
tool*, this function enables simple adjustment of the monitor's
white balance.
* The X-Rite i1 (Eye-one) Pro.
14
LMD-40/41 LMD-30/10
8-bit (256-levels) image*
LMD-51 LMD-40/41
v'
In this diagram, the raw light output of a LMD-51 Series and LMD-40/41 Series
LCD panel is compared with that of a CRT from Sony using a CIE u' v' chart,
which enables evaluation of light output from display devices. The triangular
areas show their different color reproduction capabilities (Color Space). The
green and red dots indicate the color of light output from the LMD-51 Series
and LMD-40/41 Series LCD panel and from the CRT for certain RGB input signals.
LMD-51 LMD-40/41
Note that the same light color is not obtained from the same video input.
The ChromaTRU process, on the other hand, reproduces consistent light
output extremely close to that of a CRT.
10-bit (1024-levels) image*
Orange yellow
0.55
Green
Yellow green Yellow
Orange
Dark skin
Foliage
0.50
Light skin
Moderate red
White
Bluish green
0.45
Magenta
Blue ower
Cyan
Blue sky
0.40
Purple
Purplish blue
0.35
Blue
0.30
0.25
0.20
0.15
0.10 0.15 0.20 0.25 0.30
CRT (Sony CRT) LCD (Sony LUMA-LCD Panel)
ChromaTRU Sony LUMA-LCD Panel
Image of Auto white balance calibration
* Simulated images
CRT
LCD
Red
0.35 0.40 0.45 0.50
u'
ITU-R BT.709