LED Display Screen Blog

This means that it’s quite easy to make an LED lamp that throws light in only the direction you want it to, with no efficiency-sucking reflectors or wasted light shooting up into the night sky to pollute it. So the effective luminous efficacy of an LED lamp, for street-lighting purposes, may be higher than its raw efficacy number might suggest.

I presume it’s this fact that makes the NYC pilot program worthwhile. The Red Green and Blue piece mentions that “the light footprints can be tailored for parks, street corners or mid-block”, which implies that they’re replacing sodium-vapour lamps with an unnecessarily wide throw with LEDs that light up only what needs to be lit. If this is the case, then even replacing 150-lumen-per-watt sodium lamps with 100-lumen-per-watt LEDs could yield a net improvement. Even if you just want the usual round-pool-of-light, a well-designed LED luminaire could work just as well, if not better, than a technically-brighter vapour lamp.

But LEDs are not, yet, the slam-dunk winners that so many people seem to think they are.

Here’s another problem: White LEDs wear out.

Nobody’s yet made a “native” white LED. All white LEDs so far are actually blue LEDs, with a phosphor layer over the blue die that eats some of the blue and emits the other colours needed to create light that looks white. And the phosphor slowly burns out and becomes opaque, which reduces the LED’s brightness.

There’s seldom a clear point where a white LED “dies”, but you shouldn’t expect street-light white-LED lamps to last more than a few years. Fluorescent tubes will probably need replacing more often - and they really do die, not just get dimmer and dimmer - but fluoro tubes are very cheap. I suspect the value-for-money difference between LED and fluorescent in this case would hinge on how much it costs to send people up ladders to change the lamps.

One solution to the white-LED-lifespan problem is to not use white LEDs, but a combination of red, green and blue coloured LEDs. They should last far longer…

…and can decently approximate white light.

They have higher luminous efficacy, as well. Coloured-LED luminous efficacy hasn’t been improving nearly as rapidly as white-LED efficacy has, but an array of red, green and blue LEDs should still be highly competitive, in lumens-per-watt, with other street-light lamp types.

(This is also why LED traffic signals work so well. LEDs can natively emit red, amber or green light, and you want a traffic signal to be directional, too. LED traffic lights are just hilariously better, in every important respect, than the old type, which uses low-efficacy incandescent bulbs with coloured filters in front of them that eat most of their output.)

The Greater City: Providence piece dreams of street lights that use so little power that a solar panel on top of each light can charge it up with all the power it’ll need to work all night.

That, I’m afraid, is going to remain a dream for some time yet.

Yes, cheap LED garden lights work that way. But if you scale them up and put them on top of a pole, you’ll either need an outrageously large solar panel, or have to settle for a very dim street light.

LEDs are not a miracle product for street lighting.

LED strip lighting replaces soon-to-be antiquated lighting sources of fluorescent and halogen light bulbs. Linear strip lights that utilize LED lamps employ semiconductor technology to generate illumination. This reduces the risk of fire hazards that result from overheated lighting equipment and cuts cost on energy consumption. Phantom LED strip lighting delivers value to both commercial and residential lighting arenas and is sweeping the technology world as the wave of the future.

LED strip lighting lends itself perfectly to commercial applications where energy saving and maintenance costs are a concern. Both gas and filament bulbs consume a great deal of power and become very hot if burned too long. Commercial entities must pay close attention to lighting to regulate overhead and often must limited the use of their lighting systems to ensure minimized overhead. This is not a concern with LED strip lighting. The average lamp life of LED strip lights is 50,000 hours-the longest lamp life of the industry. LED lamps generate very little heat and no ultraviolet radiation. For commercial entities in need of task and aesthetic strip lighting, LED technology offers a low-voltage, cost effective solution with minimized maintenance and dramatically reduced replacement costs.

The aesthetics of an LED strip light are equally impressive to its performance. The small low profile design of Phantom strips combines with custom shielding to allow designers to use LED lighting strips in many unique and creative ways. LED linear strips may be field cut to any size. Designers highly value the flexibility that our products deliver to them any time they work with round coves or radius applications. Phantom LED strip lights also deliver a level of task lighting unsurpassed by fluorescent and halogen lights. Because they use only minimal low voltage power and do not burn hot, they can subsequently be left on for longer periods without risk of overheating and damaging their environment.

LED lamps have evolved far beyond the red, green, and blue diodes of their early prototypes. LED lamps are now able to generate millions of colors and degrees of illuminations. Many proprietary LED strip lights are fully dimmable, and can even be used in conjunction with automated home lighting and other sophisticated aesthetic methodologies. Cool white LED lamps serve ideally in commercial arenas as sources of lighting for watches, necklaces, and diamonds in jewelry stores. The brilliant white light adds a sparkle to jewelry that maximizes retail showcasing of high-end merchandise. Warm white LED lamps produce a soft, pleasant light source conducive to both commercial and residential display applications. Fine art lighting, cove lighting, and even cabinet lighting normally call for this type of LED strip light to create a mystical aura around the piece

Asking how much a LED screen cost, is like asking how much a car cost. Such kind of questions can only have one answer. It depends. On all the following 5 variables:

1- Size: do you need a Smart car or a BMW X5 (i.e. what are the dimensions of the LED screen you want to install?)

2- Power: do you want to drive it at race circuits or you need it just to do the grocery? (i.e. what’s the resolution of the LED screen?). Note for beginners: resolution = distance between the pixels: the closer they are, the better is the image at shorter viewing distances.

3- Reliability: premium car brands use premium materials and are therefore able to provide longer warranties (i.e. so do LED screens’ manufactures)

4- Credentials: how much do you value the world-class service provided by Toyota? (i.e. beware of newly established Asian companies without a proven technology and history)

5- Training: BMW gives a 2 days safe-drive course to any Customer that purchases the new sport series. (i.e. beware of LED screen manufactures that offer no or minimum training on how to use the display effectively)

Before purchasing a LED screen you should ask yourself these questions and rank them depending of the importance that each point has for you. In this simple way you can define the specifications and profile of the ideal screen and manufacturer you are looking for.

Now, if you need to have exact numbers, here there are some real figures:

1- Size: the smallest led screen size I recommend is 2 x 1.5 meters: of course it depends on the pixel pitch, but in general that’s the smallest size I recommend.

2- Power: the best price/performance ratio resolution I recommend is 10mm: again, the resolution depends on the average viewing distance of your audience, but in general 10mm is a safe bet.

3- Reliability: the warranty should be ideally 2 years or more. some entry-level products might have a 1 year warranty. If this is the products you are looking for, make sure that maintenance contracts are available. And if they are, beware of companies asking 25% of the value of the screen starting from the second year for maintenance it might mean that they consider their product at risk.

4- Credentials: for the credentials of the company I recommend you don’t only check the website because anyone could insert a nice picture on his website (e.g. there are a few pictures of an Italian manufacturer screens published on other websites). What I would recommend you to do is to get the name of at least 2/3 Customers that are already using the screen and then talk to them. Or ask for video-testimonial (indicating the details of the person speaking).

5- Training: concerning the training, make sure that your supplier can provide you at least a basic training on how to use the screen. I’m not talking about a technical training (that’s should be obvious) but I’m talking about a training that shows you the best techniques (and the worst mistakes) to create ads, market your screen, find and win advertisers etc.

A final note concerning the price: if you are approaching the LED screen industry for the first time, I think you should consider a minimum investment of about 20/30.000 Euro to purchase a display similar to the one I described above. If you get an offer for a lower price, go through the 5-points-checklist and make sure you are aware of what kind of LED screen you are getting.

This set of 20 different LEDs each has a battery and a magnet attached. Pull the tab to activate, then place them on any magnet surface. They stick and glow brightly to let everyone know you were there, like a “Kilroy was here” message of the 21st century.

Product Features:

Decorate your world with LED Graffiti that light up and stick to metal surfaces
Each package includes 20 different LEDs:
4 x 10mm Red
4 x 10mm Blue
4 x 10mm Green
4 x 10mm Orange
4 x 5mm Rainbow Cycling
Pull tab to activate. No on/off switch
LED battery life is approximately 48 hours
This is not a Toy. Not for children of any age

The LED Magnetic Digital Graffiti set is availiable from the ThinkGeek website for $9.99.

LED Light for you opens a new dimension in business relations between you and your partners. Using our network you can now easily contact a wide range of LED light products worldwide.

We have a number of joint factory to provide you with product, Key products include LED Work Light, LED Flashlight, Outdoor LED Display, Outdoor LED Display, also we can supply LED Display Screen, LED Ceiling Lights etc.

All partners can assure you the highest level of quality, know how and service.

LED Light for you opens a new dimension in business relations between you and your partners. Using our network you can now easily contact a wide range of LED light products worldwide.

We have a number of joint factory to provide you with product, Key products include LED Work Light, LED Flashlight, Outdoor LED Display, Outdoor LED Display, also we can supply LED Display Screen, LED Ceiling Lights etc.

All partners can assure you the highest level of quality, know how and service.

Big Moving Pictures will be rolling out a fleet of mobile href="http://www.vissledlighting.com/LED-Display-Screen-c1.html">LED screen
displays which will be part of a new advertising medium. These displays will
definitely put your spanking new 52″ plasma TV in your living room to shame,
considering the fact that the ones offered by Big Moving Pictures are extremely
massive, towering over ordinary folk at 40′ x 22′. These HDTV href="http://www.vissledlighting.com/">LED displays will be attached to
trucks, allowing it to engage the audience at major outdoor events in an
unprecedented, close-to-home manner. I wonder what the power consumption of such
a huge screen would be like - certainly the truck ferrying these HDTVs around
will have more than a mere battery?

Big time events will definitely appreciate huge screens such as these, since
the noise from an F1 or Indy car is anything but quiet. Thankfully, we still
have our visual faculties to help us get a hang of everything around us, and
these huge LED displays were specially constructed to be seen at a distance in
daylight conditions, enabling it to easily address outdoor audiences of over
100,000 people. The brightest Light-Emitting-Diode (LED) technology available
can be found in these mammoth displays, making the MEGASCREENS (as it is known)
to be the biggest and most powerful LED-based display solution to date.

Setting it up at an event isn’t as simple as hooking up a few cables like the
TV in your licing room though - it will take around an hour to get it up and
running right after it arrives onsite. Good news is, this can be done by a
single technician or truck driver, doing away with the need for you to employ
yet another tech-head to get it going. The image area sizing measures 39.4′ wide
and 22′ in height, allowing you and the audience to view the promotional
material in a true 16:9 aspect ratio for direct usage of 720P HDTV signals.
Other features include an LED element pitch of 15mm and a brightness range up to
10,000NITS. I can’t wait for the first proposal in the world that uses this
screen.

Relative Products: LED Display Screen, LED Tube, LED Lamp, LED High Power

These high output LED wall washers are extremely robust and IP67 rated, suitable for use inside or out.

They are extremely efficient, using a fraction of the power of standard halogen flood lights and also have a 50,000 hour life expectancy - that’s 25-50 times longer than standard halogen devices.

Perfect for simple illumination or more advanced colour sequences.

Round (18 LED), Linear (18 LED) and Rectangular (36 LED) versions are available in White and RGB colour changing.

Please download a PDF Guide for more information

Our Relative Products: LED Lighting, LED Display Screen, LED High Power

LED’’s are special diodes that emit light when connected in a circuit. They are frequently used as “pilot” lights in electronic appliances to indicate whether the circuit is closed or not. A a clear (or often colored) epoxy case enclosed the heart of an LED, the semi-conductor chip. The two wires extending below the LED epoxy enclosure, or the “bulb” indicate how the LED should be connected into a circuit. The negative side of an LED lead is indicated in two ways: 1) by the flat side of the bulb, and 2) by the shorter of the two wires extending from the LED. The negative lead should be connected to the negative terminal of a battery. LED’’s operate at relative low voltages between about 1 and 4 volts, and draw currents between about 10 and 40 milliamperes. Voltages and currents substantially above these values can melt a LED chip.The most important part of a light emitting diode (LED) is the semi-conductor chip located in the center of the bulb as shown at the right. The chip has two regions separated by a junction. The p region is dominated by positive electric charges, and the n region is dominated by negative electric charges. The junction acts as a barrier to the flow of electrons between the p and the n regions. Only when sufficient voltage is applied to the semi-conductor chip, can the current flow, and the electrons cross the junction into the p region. In the absence of a large enough electric potential difference (voltage) across the LED leads, the junction presents an electric potential barrier to the flow of electrons.

LED Display Screen

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LED stands for Light Emitting Diode, a kind of semiconductor which is used to give and receive the electronic signal into infrared rays or light, using the characteristics of compound semiconductor. This is used for household appliances, remote controller, electric bulletin board, various kinds of automation appliances. Infrared LED Chip Stands for IRED(Infrared Emitting Diode) Chip. The manufactured chip is used for IR Emitter, TV remote controller, optical switch, IR LAN, and for a module for wireless digital data communication. Visible LED Chip Stands for VLED (Visible Light Emitting Diode) Chip, whose color covers red, green and orange etc. This chip is assembled into lamp to be used for light source of indication or signal of various electric products.

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When sufficient voltage is applied to the chip across the leads of the LED, electrons can move easily in only one direction across the junction between the p and n regions. In the p region there are many more positive than negative charges. In the n region the electrons are more numerous than the positive electric charges. When a voltage is applied and the current starts to flow, electrons in the n region have sufficient energy to move across the junction into the p region. Once in the p region the electrons are immediately attracted to the positive charges due to the mutual Coulomb forces of attraction between opposite electric charges. When an electron moves sufficiently close to a positive charge in the p region, the two charges “re-combine”. Each time an electron recombines with a positive charge, electric potential energy is converted into electromagnetic energy. For each recombination of a negative and a positive charge, a quantum of electromagnetic energy is emitted in the form of a photon of light with a frequency characteristic of the semi-conductor material (usually a combination of the chemical elements gallium, arsenic and phosphorus). Only photons in a very narrow frequency range can be emitted by any material. LED’’s that emit different colors are made of different semi-conductor materials, and require different energies to light them.

Our Relative Product:LED Display Screen, LED Tube, LED Lamp, LED High Power, LED Wall Washer, LED High Power Light