Specifications

Te c h S u p p o r t 0 1 1 8 9 6 5 6 0 0 0 • S a l e s 0 1 1 8 9 6 5 6 1 5 0
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LCD Screens
Black Box Explains
Definition Standards.
Several standards of display definition exist, from standard through
to full high definition. There are three major broadcast techniques used
across Europe as well as a myriad of displays available with many
differing resolutions. Most digital displays have all been based upon
broadcast standards. Here we look at these standards and how they
relate to display technologies.
Scaling is a function of display screens that tries to match the
content coming into the display with the actual native resolution of the
display itself. For instance, a Plasma (or LCD) display with a resolution of
720 x 480 can display 480 horizontal lines, with each line able to show
720 individual pixels. However, if the content coming into the screen is
only 360 x 240, then each line of content will need to be used twice on
the display, and each line will need to have each horizontal pixel repli-
cated to ensure a full size display. If this replication process did not
occur, the 320 x 240 content would take up only a quarter of the screen.
This process of increasing the content is called “upscaling”. If the
content coming into the display was 1440 x 960, and the display only
had 720 x 480 pixels, then the display will need to extract (or dump)
half the lines and horizontal pixels to make the content fit to the
screen. This process of losing lines and pixels is called “downscaling”.
Traditionally, all broadcasts have been interlaced, which means each
line of the display is refreshed in an alternating pattern. On the first
pass, all odd numbered lines are refreshed, and on the second pass, all
even lines are refreshed. This means it take two passes to get a
complete screen refresh. A more modern technique is called Progressive
Scan, where each line appears in order, and a complete screen refresh
happens in only one pass.
Standard Definition
There are three main TV broadcast standards available within
Europe and these are NTSC, PAL and SECAM. The American based NTSC
standard defines a resolution of 720 x 480 and runs at 60Hz. This means
there are 60 screen refreshes a second. Both PAL and SECAM have a
native resolution of 720 x 576 with a 50Hz refresh rate. A typical
standard definition Plasma display will have a resolution of 852 x 480.
This resolution of screen will upscale NTSC content slightly and produce
a good quality image. However, if used with a PAL or SECAM signal, it
will need to downscale 720 x 576 content because the display itself only
has 480 horizontal lines instead of 576. So this resolution will have to
strip out lines of original content and effectively, throw them away.
New semi standards have emerged to increase the quality of the
content such as PAL-60, which keeps the 720 x 576 resolution, but
employs a refresh rate of 60Hz instead of the traditional 50Hz, which
increases the sharpness of the picture and eliminates flicker on fast
moving content.
High Definition
This is where confusion can often enter. There are a lot of displays
stating that they are “HD Ready”. Whilst this means they can attain a
higher resolution than standard, it does not mean they can display a full
high definition signal. The medium standard definition is defined as
1280 x 720 pixels, and this is the resolution of medium HD content.
There are many screens of this format available, but there are a lot more
that increase the number of pixels available to 1366 x 768. It is easy to
display 1280 x 720 content across a 1366 x 768 display, however, these
screens cannot attain the full high definition resolution of 1920 x 1080.
On a 1280 x 720 display, medium definition content will be displayed
pixel for pixel. On a 1366 x 768 display, medium definition content will
be upscaled slightly to increase the original pixel count. Other screen
resolutions such as 1024 x 768, 1024 x 1024 are used by screen
manufacturers, purely to reduce costs on producing the display itself.
Full High Definition
This is the latest top of the range standard, defining resolution of
1920 x 1080 pixels, typically using Progressive Scan. This standard is
often referred to as 1080p. Original content created using 1920 x 1080
resolution, will be displayed on a pixel by pixel basis requiring no scaling
hardware or software to be used.
A full high definition display (1080p) can also display all the standard
and medium high definition modes by utilising built in scaling hardware
and software. Future standards have been discussed up to 7680 x 4320,
and some have been physically demonstrated, however, it will be some
time before these systems become available in any form.
W
eather-Resistant LCD Screens
Weather-resistant screens, perfect for year-round use outdoors or in damp, dusty or humid environments.
• Ideal for a whole host of outdoor
s
ituations, including shopping centres,
p
ublic transport, pub gardens, theme
parks, spas, swimming pools and a whole
lot more.
• IP56 weather-resistant certified.
This state-of-the-art weather-resistant LCD
outdoor screen has been specifically designed
for use outdoors and in wet, humid or dusty
environments. With its water-resistant casing
conforming to strict IP56 standards, it’s perfect
for outdoor digital signage or as an
entertainment solution for your event or
premises.
Weather-resistant Television
Fully sealed with a lightweight aluminium
frame, it has a toughened glass front, which is
finished with an anti-reflective surface. The
LCD screen is designed in either HD Ready or
FUll HD resolutions, ensuring the television
delivers superb brightness, contrast and
colour quality - even in bright sunlight.
• Supports S-video, Composite, VGA,
C
omponent and HDMI.
•
Anti-reflective surface.
• Toughened glass.
• Wide viewing angle of 178
O
.
Secure Television
The lightweight aluminium frame and
toughened glass, along with the security
f
ixings bracket with a padlock system is
placed behind the screen to ensure it cannot
be reached without installation tools. This
enables you to keep your screen outdoors in
all weather, day and night.
Screen sizes and options available
The screens are currently available in two
sizes, with either HD Ready or Full HD
technology resolution. The DSS42WR 42” HD
Ready screen has a native resolution of 1366 x
768, the DSS42WRHD and DSS47WRHD have
full high definition standard 1920 x 1080p
screens.
Item Code Price
Weather-Resistant LCD Screens
42” (HD Ready) DSS42WR £2,499.00
42” (Full HD) DSS42WRHD £2,850.00
47” (Full HD) DSS47WRHD £4,199.00
Weather-Resistant Speakers
for 42” Screen DSS42WRSP £199.00
for 47” Screen DSS47WRSP £229.00
Security Wall Bracket for Weather-Resistant
Screen DSSWRWB £199.00
Brand new
product