Wednesday, July 20, 2005
NEC Presents High-End LCD with LED Backlight Technology
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NEC Display Solutions has announced the launch of the SpectraView Reference 21 (SpectraView LCD2180 WideGamut LED), a 21.3-inch LCD monitor with LED backlight technology.
Equipped with a colour calibration system for accurate colour matching, NEC
Display Solutions has taken the next step in display technology.
Recent technology advances in digital image acquisition, colour-processing
systems, colour printers and other photographic I/O devices have been
remarkable. As well as ever-higher resolutions, the range and depth of colour
reproduction has also shown significant improvements. A standardised colour
space promises the benefit of consistent colour reproduction across all digital
platforms and devices (the so-called colour workflow) from the point of
acquisition to the point of delivery. Accurate colour consistency in large
colour spaces is required for professional users from the DTP and
colour-proofing areas, as well as for the use of specialist devices for image
processing and industrial 4-colour printers. These requirements are now
fulfilled by the introduction to the market of the NEC SpectraView Reference
In recent years, LCD technology has become the dominant force in the display
market due to the excellent performance in picture quality and ergonomics,
reduced energy needs, space saving and low cost of ownership benefits. New
developments mean that LCD monitors can now be used for wide colour space
applications, which have historically been the domain of CRTs.
Technical Specifications of the NEC SpectraView Reference 21
The basis for the SpectraView Reference 21 is the Super Advanced Super Fine
Technology (SA-SFT) Dual-IPS panel and LED backlight technology. The technical
challenge has been to develop display technology that covers more than 100% of
the Adobe RGB colour space and ensures absolute colour accuracy in all areas of
colour processing on the monitor. The principle of operation of a traditional
LCD screen is based on placing a bright white-light source (typically a
mercury-filled fluorescent tube) behind a series of colour matrix LC filters.
The LCD filter matrices are controlled digitally to provide fine adjustment of
the light throughput and therefore generate a grayscale image retrieving its
colour due to the colour filters in front of the LCD. The backlight determines
the colour temperature and colour space available, which has typically been
approx 72% of the NTSC colour space (CRT monitors achieve around 84% NTSC).
The innovative RGB LED backlight, consisting of red, green and blue LEDs (Light
Emitting Diodes), generates white light allowing a wider range of spectral
colours to be displayed. More than 100% of the Adobe RGB and NTSC colour space
can now be reproduced with an LCD monitor. On top of this, the LED backlight
allows for accurate adjustment of the white point between 5000K and 9300K
without loss of brightness, as the LCD layer does not change the white colour
temperature as in the case of LCD's with conventional CCFL backlighting. The
LED backlight itself is capable of changing its white point by varying the
ratio of the red, green and blue mixture. A feedback sensor ensures that the
display operates consistently with a pre-defined performance.
As a result of this feedback system, the monitor does not need a warm-up phase,
but displays stable colours after just a minute. The new mercury-free LED
backlight system and the optimised colour filters of the LCD generate an
enhanced colour space allowing a wider range of spectral colours to be
displayed. The Adobe RGB colour space can be more than covered and therefore
consistently reproduced. This innovative solution has been developed by NEC
Display Solutions in close co-operation with professionals from the colour
With the NEC SpectraView Reference 21, NEC Display Solutions provides the
optimum solution for demanding users in the colour management sector with a
very wide colour space, a screen diagonal of 21.3 inches and a high resolution
of 1600 x 1200 pixels. In addition, a high-accuracy internal feedback system
for colour calibration has been integrated to control colour temperature and
brightness. The backlight system achieves a delta-E of below 1 within less than
one minute. The NEC SpectraView Reference 21 is equipped with a Dual-Domain
S-IPS panel, the Super Advanced Super Fine Technology (SA-SFT) panel produced
by NEC LCD Technologies, which provides high-speed response times and
ultra-wide viewing angles with less colour shift.
The integrated 10-bit gamma table allows an accurate gamma correction function
- one each for red, green and blue - for optimum hardware calibration. 1,021
tonal values per colour mean that gradation adjustment is much more precise.
Even the most subtle tonal value gradations and grayscales are displayed with
extraordinary precision and clarity, which enables the highest quality of
colour accuracy to be achieved. Also integrated into the NEC SpectraView
Reference 21 is the ColourComp function, a colour uniformity correction
improving the Delta-E (colour uniformity variances), which is already improved
in the factory by profile validation. These measurement results are
interpolated to correct the colour uniformity of each of the 1600x1200 pixels.
This correction function is uploaded to the hardware of each monitor.
Hardware calibration without compromises
The SpectraView Profiler software supplied with the unit allows the brightness
and the white point to be calibrated, creating the ICC profiles.
Included with each monitor is the light shield, secured by magnetic strips, the
SpectraView Profiler software, digital cable and the SpectraView Certifier
certification document with the proven and tested performance characteristics
recorded for each individual unit during final inspection.