LOGISTICS LOGO LED,LED SIGNS
logistic International Inc
www.logisticsled.com
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Frequently Asked Questions

Q:
A: The price of a Logisticsled screen depends on two variables:
FAQ
- Resolution (that means the total number of LEDs in each module).

- Screen size.

Due to the great variability of both factors, depending on the requirements of each client, it is impossible to determine the price of a screen in advance.

In order to resolve that problem, Logisticsled presents a new tool, called PRICE CONFIGURATOR, where you can get the price after entering some data based on your personal requirements and needs.

The bigger the screen, the better the resolution. Big screens are built using a big number of vertical and horizontal pixels. Therefore the bigger the number of pixels available, the better the screen definition and the better the video image and quality. It goes without saying that the bigger the screen, the higher the price.
Q: How much does a LED screen consumes when is ON?
A: The LED consumption is between 15 and 100 miliamperes, depending on the diode’s color, the electricity passing through it and the manufacture quality.
Q: Do I need a special permission from the local City Hall in order to install a LED screen in public places?
A: Yes. If you want to install a LED screen in public places it is necessary to get a council’s permission. There are no standard regulations about this, so the user must obtain this information directly from the City Hall where the screen will be placed.


Q: What is the most suitable PORTABLE STRUCTURE for a LEDwall?
A: It is not difficult to find place where to install a LED graphic display, because they have different structures for each application. Among others, LEDwalls can be installed on:

1) trucks

2) stands

3) trusses

4) buildings or structure’s wall

5) wires

6) wood


Q: Can you have a BOTH SIDES view in a LED screen?
A: The only way you can visualize images on both sides is using two LED screens, standing one against the other by the back side


Q: What are the differences between INDOOR and OUTDOOR screens?
A: The main differences between indoor and outdoor screens are:

1) The outdoor screens have a lower resolution because the people watching the images on the screen are located in a longer distance, so they don’t really need a high resolution, as it is the case for indoor screens.

2) Because of the typical characteristics of the places where they are installed, the outdoor screens have special protection against dust, water, salty air, corrosive elements and tough weather. On the other hand, outdoor screens have special ventilation systems which keep the inside temperature constant and don’t let it passes the critical levels.

3) The outdoor screens have a double function protection system, protecting the screen against the sun (increasing the contrast levels and obtaining a better image) and against vandalism acts.

4) The outdoor screen requires high brightness because the people watching the screen are placed in a larger distance, and it is necessary brighter images for a better visualization.


Q: Where can I find SPARE PARTS for Logisticsled screens?
A: When you buy a Logisticsled Screen, we give you, at no extra cost, enough spare parts to fix any failure due to normal use. Also, if you want, we made any reparation with no cost if your purchase is within the warranty period.

Q: What is the MODULAR SYSTEM?
A:

It is the system that allows you to build any screen you want. Say it in another way, the modular system permits building a screen in any dimension, assembling the right number of modules. The Logisticsled  modules have a lot of dimensions and perfect pixel alignment in horizontal and vertical position, guaranteeing that the screen will be in perfect conditions after it has been assembled. Also the modular system offers advantages such as easy transportation, easy maintenance, and no size and shape restrictions.

 


Base Module

975 x 975 x 125 mm

Modular System

Q: Do LEDs really have a lifespan of 100,000 hours?
A: Yes they do! In order to guarantee a 100 000 hours lifetime, it is necessary to accomplish two conditions:

1) The internal temperature of the LEDs must not exceed 120°C (measured in normal conditions).

2) The electricity power which passes through the LED must not exceed 20mA

If these two conditions are respected, the LED brightness is reduced in 50% at the end of the 100 000 hours.
The Logisticsled screens help you to accomplish the above mentioned parameters due our high technological devices:

1) Special ventilation system which is electronically controlled.

2) Specific chip that manages every single LED in terms of the electricity power that goes through it.

3) Unique heat dissipation system.

Q: What is the CONTRAST LEVEL?
A: The contrast level is the difference between the light which is emitted by the screen and the ambient light that is reflected by the display. When the reflected light is lower, the contrast level is higher and it makes the images more clear. The Logisticsled screens has anti-reflex flyers which split the ambient light so the contrast level increase and the images get a much better view, even with direct sun light exposition.
Q: What is the REFRESH RATE and what is its importance?
A: The refresh rate is the number of times that the images are refreshed every second. It is an important factor because the images quality depends on the refresh rate the quality. For instance, if the refresh rate it is too low it can cause headache and eyes damage.

A normal TV has a refresh rate of 50 Hz; the last generation TVs has a refresh rate of 100Hz at top. The Led-G screens have a refresh rate of 240 Hz, more than two times the last generation TVs refresh rate. That is another demonstration about the quality of the Logisticsled products
Q: What is the VIRTUAL PIXEL TECHNOLOGY?
A: It is a technology that allows image visualization with higher definition than the physics definition of any display. The Logistics's Lites virtual pixel technology is able to control each LED. That means that each pixel can superpose the next one, and make the “virtual pixel” (a pixel which is only perceptive to the human eye).

As we know, the higher the definition, the better the image visualization. For that reason the Logisticsled screens, due its virtual pixel technology, can visualize images with four times higher definition than the physical definition of other displays, and therefore the images are detailed and real.


                                    
Physical Definition
Without Virtual Pixel Technology


                                    
Virtual Definition
With Virtual Pixel Technology


Q: What is the IP rate and what does it measure?
A: IP (abbreviation for Ingress Protection) is the protection rate against the humidity and dust. The IP rate has two numbers. The first one refers to the protection grade against the dust, and the second one to the protection grade against the water. When those numbers are higher, it means that the electronic device is more protected and therefore keeps its internal components safe and clean. The Logisticsled screens have an IP65 protection grade, the highest IP rate in the visualization LED field.
Q: What is the VISIBILITY ANGLE of a LED screen?
A: The visibility angle of a LED screen is the angle where the luminosity of the display is higher than 50% of the frontal luminosity. Each LED screen has a different visibility angle. For example, for any screen with a 120° visibility angle, it means that in a frontal view it has 6000 NIT luminosity, and on the limit of the 120° visibility angle view has 3000 NIT luminosity.


   
Q: How come is the PURE WHITE created with THREE LEDs of different colors?
A:

The reason for that is that the human eye has three types of receptors, and each receptor corresponds to a primary color. The rest of the colors are a mix of the primary ones and we can see them thanks to the simultaneous stimulation of our three receptors. In that case, the white color is also a mix of the three primary colors (50% of green, 30% of red and 20% of blue).

The LogisticsLED screens can get a total of 280 million colors, which guarantees a high quality in image and visualization.

 


Chromaticity Diagram - CIE 1931

RGB visualization system

SMD TOP LED real picture

Q: What do we understand by COLOR TEMPERATURE and what is its importance?
A: Color temperature is a procedure that allows the evaluation of the lights properties in any given luminous source, and its results are expressed in Kelvin degrees.

If the color temperature rate is low it means that the tone of the color is nearly to red, while if the rate is high that means that the tone of the color is nearly to blue.

In the LED screens it is very important keep the color temperature rate in a constant level, since in that way we can visualize high quality images.

The LogisticsLED screens have an electronic system of equalization, which compensate the color parameters with the ambient luminosity automatically. As a result of that the user obtains a constant color temperature, during day and night.
Q: What is the 16 BIT TECHNOLOGY?
A: The 16 bit technology is the one defined by the possibility of visualizing 512 levels of color for each one of the three primary colors used in the LED display.

While in the ordinary 8 bit technology allows a visualization of 256 levels of colors for each primary color, for a total of 256 x 256 x 256 colors (16.8 million colors), degrading the image during the video elaboration phase, with the Logisticsled screens 16 bit technology we can visualize 65 000 levels of colors for each primary color, meaning 65000 x 65000 x 65000 colors, for a total of 280 million colors. On the other hand, this technology allows the projection of videos with high quality images, without altering the picture.


 
8 bit technology - 256 color levels
16,8 million colors

16 bit technology - 65,000 color levels
280,000 million colors

Q: What are the COLOR LEVELS?
A: Color levels are the spectrum of tones, from opaque to vivid, that any color can have. In the case of the LED visualization field the color levels considered are the ones related to the three primary colors: Red, Green and Blue.

 
9 color levels


90 color levels

Q: Is it possible to visualize a VIDEO on a LED display?
A:

For sure it is! Now, if you want to get a high quality video visualization, the screen must have at least a 192 x 128 pixels definition.

You have to remember that the Logisticsled Signs screen can work like a replicate of the monitor of your computer. Everything that appears on your monitor can visualized on the Logisticsled Signs screen.

Q: What are considered to be the MINIMUM and MAXIMUM distances for watching a LED screen?
A: The minimum and maximum visualization distances for any given LED screen are measured by two factors: the pitch and display surface.

In the case of finding the minimum distance, we can get it by converting the number of millimeters of the pitch in meters. For instance, a LED screen which has a 20 mm pitch would have a minimum visualization distance of 20 m.

On the other hand, the maximum visualization distance depends on the display dimensions, and we can calculate it by multiplying for 10 times the total of square meters of any given display. In that case, a 4 x 4 meters display gives a total area of 16 m², so the maximum visualization distance is 160 m. That maximum visualization distance is for the legibility (in that distance we can see legible images). The distance of visibility is two times the legibility distance. So we can say, according to our example, that the images are legible up to 160 m, but visible until 320 m.

For the maximum distance for the text in the screen, we can say that for each cm of the letter, the text is legible until 5 m. In that case, a 10 cm letter has a legible distance of 50 m.
Q: What's the difference between screens with SAME DIMENSIONS but DIFFERENT DEFINITION?
A:

The difference is defined by the distance from which the image has to be viewed for an optimal image quality. A display with a high definition has the finest quality viewing in short distances, while displays with low definition have the best possible quality viewing in large distances. For instance, in the images we present here, FIG 1 has a higher definition tan FIG 2, but if you watch your monitor from a three meters distance the image quality improves. The reason for this is images with lower definition are ideal for longer

 


FIG. 1- Higher Definition
(Short Distance)

FIG. 2 - Lower Definition
(Longer Distance)

Q: What is the DEFINITION of a LED display?
A:

The definition of a LED display is the number of vertical and horizontal pixels composing the whole screen. For instance, standard low definition modules are 96 x 64 pixels, common medium definition modules are 256 x 192 pixels, while frequent high definition modules are 640 x 480 pixels. As we can see, the Definition is extremely dependent on the distance between pixels. According to that idea a 96 x 64 pixels module has more distance between the pixels than a 640 x 480 pixels module, and that is the reason for the first one to have a lower definition that the second one.

 


Screen Definition
18 x 12 = 216 pixels

Screen Definition
9 x 6 = 54 pixels

 

 

Q: What is the RESOLUTION of a LED display?
A:

The resolution of a LED display is defined by the number of pixels contained in each square meter. As we can see, the resolution is opposite proportional to the distance between pixels. For instance, if we have a lower distance between pixels, the screen will have more pixels, and therefore the resolution will be higher.

                           

Module's Resolution                                                    Module's Resolution
        3 x 3 = 9 pixels                                                          6 x 6 = 36 pixels

Q: Which is the difference between SMD and PTH LEDs?
A:

The difference between these two technologies is that the SMD components are mounted on the surface of the electronic board, but they do not pass through the board like the precedent technology, the PTH technology. In spite of this, the main difference is that the SMD technology is based on the miniaturization of all electronic components. In that way the SMD technology allow us to place three LEDs (red, blue and green) into the same case, creating what is known as a 3-colors LED. The possibility of viewing three colors in simultaneous allows the creation of big screens with a reduced pixels distance, producing a very high image quality and definition.

 


PHT technology LED

PHT technology vs. SMD technology

SMD technology LED

Q: What is a 鈥渓ine pitch鈥?
A:

A line pitch, sometimes called dot pitched, is the distance between two pixels in a LED display. That distance is very important, considering that a minimum difference in millimeters can make a big difference in the properties and uses of the screen. The pitch marks the minimum distance viewing, the module definition and the resolution of the entire screen.

 


Pitch 20mm / Total  pixeles = 9

Pitch 10mm / Total  pixeles = 36

Pitch 15mm / Total pixeles = 16

Q: What is a PIXEL?
A:

A pixel (an abbreviation for picture element), is a single point in any image. A pixel is present on every LED solution. It can be composed by one or more LEDs, depending on the dimensions and characteristics of the device. In the cases of big models, the pixel is commonly composed by many LEDs.


 
1 LED x pixel


4 LED x pixel

Q: 1) What is a LED?
A:

LED (an abbreviation for light-emitting diode) is a semiconductor that emits visible light. That light is caused by the electrons flowing between the anode and cathode. The color of the visual emission depends on the used material.

The LED doesn’t have a filament and therefore has a larger live and a higher reliability in comparison to traditional lights.

 


                                 

Colored LEDs

Q: How much do LED signs cost
A:

 

Okay, this is a trick question. What you actually want to ask yourself is where will the budget for your LED sign come from. It’s easy to think of it as a capital expenditure; but a smarter place to look might be your advertising and communications budgets. But to answer the direct question, typical LED signs are similar to new automobiles in costs.

 
When you consider advertising facts such as newspaper circulation versus traffic count, radio audiences versus traffic count, and how much it costs on a per-day basis, a Logistics LED sign beats newspaper, yellow pages and radio hands down. So your budget may be a little different than you think.
Q: Which LED sign is best for my business or organization?
A:

There are a number of factors to consider when choosing an LED sign, including: size, pixel pitch, location, marketing/messaging goals, to name just a few.,

Applications for LED signs vary greatly, from 2-lane streets with minimal setbacks to 6-lane highways with signs 50 ft above the ground. These considerations dictate the size display you will require and also affect the best choice in pixel density.
 
We also encourage you to visit our Signs 101 section to learn more.
 
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