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Degradation
Generally speaking, an LED diode will quickly lose
about 20% of its initial brightness after the first
2000 hours of use. After that, the LED diode's
brightness only degrades at a very slow and
unnoticeable rate, until it dies at the generally
estimated lifetime of 100k hours. This unique
degradation curve is the result of the nature of
semi-conductor chips. When shopping for an LED
display, it is important to keep in mind that the
manufacturer's claimed display brightness will drop
about 20% after 2 to 3 months of operation.
Hybrid Pixel
Signs Plus offers Hybrid Pixel Technology which
offers numerous benefits. It was the first hot
swappable LED display pixel of any kind in the US
market and is still the leading technology of its
kind. Unlike most LED manufacturers who solder their
LED diodes on the surface of their display or
modular units and cover them up with epoxy coating,
Signs Plus utilizes more advanced and expensive
technology to ensure our product performance is
superior. Each Hybrid Pixel unit has a mini circuit
board inside an individual gold plated pin that
connects the unit to the display surface. This makes
replacing damaged LED pixels extremely easy. Beyond
this hot swappable part, our Hybrid Pixel Technology
is unique in the surface design of the hybrid unit.
Instead of 1 single horizontal glare protection
louver over a huge quantity of LED diodes,
individual louvers are used for each LED diode,
creating maximum glare and reflection protection as
well as contrast enhancement and light focusing. The
uneven display area surface created by the Hybrid
Pixels further enhances a display's contrast under
direct sunlight. For more information, please call
your Signs Plus Product Manager.
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LED Diode Binning
The brightness rating of an LED diode is usually
expressed in a range instead of a certain NIT value.
Because the core of LED diodes are made
from semi-conductor chips, even the best LED
manufacturers in the world cannot control or
guarantee that diodes manufactured within the same
batch have exactly the same brightness. Therefore
LED manufactures have to separate their diodes into
bins of similar brightness. When a LED display
manufacturer makes an LED display, it is important
to use LED diodes from the same bin in order to
maintain brightness uniformity. Signs Plus signs
contain only top quality/brightness
bin LED diodes from top LED manufacturers.
Ther,efore the
LED uniformity of a Signs Plus display is always
guaranteed to be among the highest, if not the best in the
world. We know when a customer installs an LED
display at their business location, it becomes part
of their business image. We only want the best for
our customers!
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LED Diode Density
LED diode density is a good starting point when
comparing the display performance of LEDs with
similar specs. Just like your car's engine, more cylinders
generally mean more power. More LED diodes per unit
area generally means higher brightness and thus
better performance. Our vision has always been to
help our customers build/increase their business.
Because of this, Signs Plus has always invested in
the quality of our product by using more LED diodes
from only the best LED manufacturers. This ensures
our customers that their business image is being portrayed by the brightest, attention grabbing
advertising medium available. A low brightness,
unreadable LED display will not help to increase
sales because it's less likely that your
customers will notice and read what you have to say.
Give us a call
today, Signs Plus welcomes you to visit our office
and see our LED displays in action! There are
countless LED display manufacturers claiming
all sorts of things on paper. We want you to see
and experience instead of reading and listening.
Seeing is believing.
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Matrix Resolution
An LED display's matrix resolution represents how
many pixels there are on the display. A display with
a matrix resolution of 320 (h) by 480 (w) means it
has 480 pixels from side to side and 320 from top to
bottom. The higher the matrix resolution, the
better an image is represented on the display. As we
discussed earlier, for a fixed display area,
selecting a smaller pitch will increase the matrix
resolution of the display which means better image
quality.
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NIT- Unit of Brightness
NIT is the brightness measurement unit the industry
usually uses to calculate the brightness of an LED
display. It is calculated as the following:
NIT = cd per
pixel X pixels per M2
Generally
speaking, the average sun light brightness in North
America is about 5000NITs. Based on this fact, an
outdoor LED display must be at least 5000NITs
bright, after the initial 20% brightness
degradation, to be visible during daylight hours.
Therefore, when purchasing an LED display, it is
important to compare the brightness of displays from
different manufacturers, in sunlight, to make sure
you are getting your money's worth and your
customers will be able to read your display when
driving by.
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Pitch
Pitch is the distance from the center of a pixel to
the center of an adjacent pixel. Pitch is very
important because for the same display area, the
pitch determines the resolution of the display. For
smaller, tighter pitches, you have more pixels per
unit area and thus a better resolution. Selecting
the right pitch when you are purchasing an LED
display may save you money as well as get you the
appropriate resolution for your particular
application. Please feel free to contact your Signs
Plus sales representative to help you select
the best pitch for your display!
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Pixel
A pixel (short for picture element) is an image
component of an LED display's overall resolution.
The more pixels used to represent an image, the
higher the resolution which equals greater picture
quality. In an LED display, a pixel can consist of 1
or more LED diodes. A monochrome or grayscale LED
display pixel has 1 or more LED diodes of the same
color. A color LED display pixel either has LED
diodes of different colors or 1 single diode which
contains semi-conductor chips that emit light with
different colors.
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RGB Display
Red, green and blue (RGB) are the 3 basic colors
human eyes can perceive. By using an appropriate
combination of red, green and blue intensities, many
colors can be represented. An RGB display simply
means it's a full color display. However, the number
of colors that can be shown on an RGB display
depends on many factors. Two of the most important
factors are the input data signal quality and the
display's color processing ability. For example, if
the input video signal only has 8-bits of
information per color, no matter how many colors
your display controller can process, the display
will only show 8 bits of shadings per color. Signs
Plus' current full color display controller can
process up to 16 bits of information per color
equaling a total of 281 trillion gamma corrected
color levels. However, most of today's video input
sign also are less than 10 bits per color.
Therefore, the actual color depth showing on a Signs
Plus LED display is only as good as the quality of
the input signal.
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Viewing Angle
Diodes can put out a single, narrow beam of
light like a flashlight, or they can output a wide
array across a room like a light bulb. Diodes output
about the same amount of light no matter what type
they are - but the "high-beam" diodes with a narrow
angle focus more light into one small spot, whereas
the "wide angle" diodes spread their light across
the horizon. So, if you were to stand directly in
front of a sign made from "high-beam" diodes with
narrow viewing angles, you would see an extremely
bright sign. However, the minute you walked away
from the small spot light of its focus, you would
see nothing but black.
With wide viewing
angle LEDs, the image is visible in consistent
brightness and uniform colors throughout the entire
viewing range of the display. Signs Plus only uses
wide angle 1400 LEDs to maximize audience exposure,
maintain the highest color accuracy and extend
reading times. Maintaining brightness across a wide
spectrum also requires greater light output, which
is why Signs Plus uses a higher LED diode density
than any other manufacturer in the industry.
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