6 questions about LED screen

The field of LED display screens is very important for a lot of customers around the world, so we will replay 6 questions about LED screen to to explain the importance of these screens.

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1. What does the term LED mean and what does stand for?
2. What does the term pixel mean?
3. What is the difference between DIP and SMD in advertising screens?
4. What are the advantages of LED screen?
5. How to choose the right pixel size for your screen?
6. What are types of LED screen?

1- What does the term LED mean and what does stand for?

One of 6 questions about LED screen. The term LED stands for (Light Emitting Diode), which means light-emitting diode An LED is a device that emits light when an electric current passes through it. LED first appeared in 1962 as electronic components that emit only low intensity red light.

However, the recent versions are very bright and are available in many other colors. It is mainly used in various electronic devices such as watches, light bulbs, mobile phones, monitors and many more. Since LEDs have a longer lifespan and are more energy efficient than regular bulbs, many industrial companies have used them in their products, especially in home environments.

2- What does the term pixel mean?

If you are looking for digital signage for your brand then pixel pitch is the industry term you will have to get used to so when it comes to finding the right screen it is important to know the pixel pitch that way you can understand what is appropriate for a successful image display.

In layman’s terms a pixel pitch is the total distance between pixels usually measured in millimeters and is a measure from the midpoint of a pixel to the midpoint of an adjacent pixel When the pixel pitch is smaller the LED will be closer and result in higher resolution quality.

Higher pixel pitch means more space between pixels as such you get lower resolution Smaller pixel pitch LED display relates to resolution for optimum viewing distance When the number is small more pixels are used to make the image on the screen this way it improves display resolution and optimum viewing distance.

This means that when the pixel pitch is small, the viewer can have good resolution even when standing close to the screen. While a small pixel pitch LED display improves picture quality, it comes at a hefty price. In short, when you have more LED clusters on the screen, the pixel pitch will be Less and your expenses will be higher.

However, you can cut costs without compromising display quality by choosing a large pixel pitch, provided your audience is not too close to the screen. However, if there is not much space between the screen and your audience, a small pixel pitch of 4mm is a must.

If you want to hang the screen higher and farther from your audience such as airport signage, 6mm LED display should be the best choice. Images from the LED screen with small pixel pitch make the image edge clear and the information is accurately restored.

3- What is the difference between DIP and SMD in advertising screens?

The most common type in outdoor advertising screens is the DIP, which is short for (dual in-line package), as it has the ability to give higher brightness, greater resistance to weather factors, and better heat dissipation, since the entire LED is far from the panel and is connected to the panel only by two legs ( The anode and the cathode) and the plate in this case has openings for the passage of the feet of each LED.

And they are soldered from the other side through tin and connected to the circuit while covering them with glue as an insulating material for water and moisture (GLUE) and this type is suitable for large screens that do not need high accuracy in pixels The screen is that the size of the LEDs is rather large.

As for the other type, which is SMD, which is an acronym for (surface mounted technology), it is more suitable for indoor environments because it is characterized by the small size of the LED, which allows it to be used in screens that need high accuracy and has a wider viewing angle and does not produce heat High, it is more efficient in the use of energy and less expensive in production.

4- What are the advantages of LED screen ?

One of the most important 6 questions about LED screen .

1. Long life, up to 100,000 hours of continuous operation.
2. Saving electricity consumption due to the famous LED technology.
3. The flexibility of the design and its suitability with any place and any project easily.
4. The intensity of lighting with the clarity of colors, and this is the secret of its high ability to attract attention.
5. Environmentally friendly, as there is no mercury or ultraviolet radiation.
6. It works on a low voltage and does not need a high current.
7. Ease of dealing with it and changing the content through the attached program.

For more information’s about EGYLED products, Click here.

5- How to choose the right pixel size for your screen?

And due to the large number of models with different prices, you must check during your choice to get the right size for you. You must first determine the target viewing distance, that is, the distance between the screen and the person watching.

• Display distance.

Pixels or “PH” or “P”, which means Pixel Pitch or the distance between each two pixels on the screen.  For example, the screen of the P5 model means that the distance between each two pixels is 5 mm and the resolution is 40,000 pixels / square meter.

The smaller the PH value, the higher the pixel resolution and the smaller the viewing distance. Therefore, if you want to have a close viewing distance, you have to take small pixel model like P1.5, P2.5, and you can’t take large pixel distance like P5, P4.

• Size display.

The size which is less than 10 square meters, P10 outdoor LED display is recommended. From the above, we can conclude that there is a relationship between viewing distance, area, and screen resolution. You must specify your requirements accurately so as not to pay a higher cost than required.

For more information’s about EGYLED solutions, Click here.

6- What are types of LED screen?

One of the most important 6 questions about LED screen. The types of advertising LED displays screen are mainly divided into indoor advertising LED displays and outdoor advertising LED displays according to their installation places. EGYLED advertising LED display is durable and excellent in performance, and can display advertising content in various occasions such as outdoors, semi-outdoors, and indoors.

• Indoor LED Display

Indoor LED display is an LED display screen installed in an indoor environment and is widely used in indoor places. Compared with other types of LED displays, indoor LED displays have high refresh rate, high brightness, high contrast and color reproduction, and the display effect is clearer, brighter and more vivid.

Indoor LED displays are divided into P2.5, P3, P4, P5, and P1.8and other specifications. The larger the number behind the number, the sparser the screen pixels. EGYLED provides high-quality, high-stability indoor advertising LED displays, featuring ultra-light weight, ultra-thin thickness, easy maintenance, and easy installation.

Additional reading:
10 Reasons Why 20w COB LED Chip Outshines the Competition

If you are looking for more details, kindly visit smd led types pdf.

• Outdoor Advertising LED Display.

Outdoor advertising LED displays are widely used in large outdoor plazas, stadiums, cultural and entertainment centers, highways, etc., with IP65 dustproof and waterproof functions, which can withstand harsh weather conditions in outdoor activities. Outdoor display screens are divided intoP4, P5, P6, P6.67 and other specifications.

EGYLED outdoor advertising LED display cabinet is light, portable and easy to maintain, which not only saves time but also saves cost. Thus, we have clarified the most important 6 questions about LED screen,

6 questions about LED screen

LED is in high demand. But do we always know what type of LED we are buying? Paul Milligan investigates.

LED has been the hottest product in the AV world for the last decade. You only have to open the pages of a trade magazine or walk around the ISE or InfoComm shows for two minutes to see a wide range of LED products from around the globe. It’s not rocket science to work out why it’s everywhere right now. Its falling in price and rising in quality, so buyers are now getting a far better product for less money than they were 5 or 10 years ago. Its super bright, quick and easy to install and requires little maintenance once built. Basically, it’s an integrator’s dream. So its not surprising then that the LED market is becoming flooded with new manufacturers looking to get a piece of this lucrative pie. The issue with such a vast array of new companies being added to the market is that users can be baffled by what’s in front of them, and also confused by the different types of specific LED technology you are getting for your money.

To help clear this up we spoke to established LED providers to go through the different LED package types, and why you would choose certain ones. The four LED package types that are widely used in videowalls are DIP (Dual In-line Package), SMD (Surface Mounted Device), GOB (Glue-on-Board) and COB (Chip-on-Board). Graham Burgess, CEO of contract manufacturers DigiLED has been involved in LED sales and installation since 1990, so is one of the most qualified to guide us through a short history lesson of LED, and its different types, starting with DIP. “When people started buying LED screens instead of cathode ray tube and FDT (Fluorescent Discharge Tubescreens), they were using a technology called DIP (also known as Through Hole technology). It’s a cylindrical LED with a dome at the end of it, and two LEDs are pushed through a PCB, hence Through Hole. It was used for outdoor screens in the early days, and you picked a combination of red, green and blue to create a pixel. The diodes that you put together to make the pixel, there were just too many of them to get a very tight pixel pitch, so its limit was 12mm or 10mm. DIP is the most robust, the most traditional of LED technologies, but used very little anymore, because there are lots of limitations with DIP.”

You will still find DIP LED screens being installed, with the majority as outdoor screens with a long viewing distance. The disadvantages of DIP are that it’s expensive to produce and has a narrow viewing angle. When viewing off-centre, the colours may appear dimmer. Burgess says DIP began to fade into the background around the turn of the century, and credits Lighthouse with the emergence of SMD, which doesn’t use three colours (red, blue and green) of LEDs, instead it makes a single point of white or black by grouping them into a single package. The resulting package can then be soldered onto a PCB. “It’s not as bright or as resilient as DIP, not as waterproof as DIP, but massively more versatile, and like all of the technologies has improved over the years,” adds Burgess.

Unlike DIP, SMD LEDs are not visibly separate, so the gap between each pixel is almost unnoticeable to the eye. ROE Visual’s range for now consists just of SMD LED, with a release of a COB-based display (more on that later) planned for later this year says Marina Prak, marketing manager, ROE Visual Europe. The big advantage of SMD is its size, it’s small so can produce tiles of just 0.4mm pixel pitch. Due to mass production, SMD is generally cheaper too. It does has some disadvantages however, its prone to damage because of its small size, and has a poorer heat transmission rate, which can result in higher maintenance costs over time. The inevitable comparison between DIP and SMD also raises another issue for buyers says Burgess, and one they may not know the importance of, about the comparative differences between gold thread and copper thread technology.

Traditionally LED used gold thread technology because people were worried about the longevity of LEDs, so to be on the safe side they always use gold thread instead of copper thread LED. What he has seen in the last five years is an increasing use of copper thread LEDs, driven by costs (copper is cheaper than gold thread LED). The difference in price can be up to 30%, so you can see why people would be tempted, but be aware that cheaper price comes at a cost says Burgess. “A lot of uneducated customers don’t know there’s a difference, or don’t ask about the difference. They’ll get a quote and one price is much lower than the other and they buy on that basis. If they investigated, they’d probably find that that cheaper LED quote is because it’s using copper instead of gold, and you won’t get as much brightness and it will consume more electricity because it’s slightly less efficient than gold. So whilst the capital cost is cheaper, your running costs and the efficiency the LED won’t be as good. I’m not saying there’s no place for copper thread LEDs, I’m just saying that it’s one of those things that any customer is buying should be asking, am I getting copper thread LED? Or am I getting gold thread LED?

All ROE Visual’s LED products use gold thread says Prak, because it “chooses the highest quality parts and materials available in production to ensure a durable and stable performance of all our display types.

That leaves us with the two newest LED technologies, called GOB and COB. Again, Burgess can provide some context. “The reason for the move to those two technologies is because LEDs when you get to a very tight pixel pitch (such as SMD) it becomes very fragile, and it’s easy to catch the edge of a PCB and knock off a couple of LEDs. Often the cost of doing that is not that you have to pay an engineer to resolder the LEDs, it may well be that in knocking off the LEDs, you’ve damaged the track on the PCB, and it’s damaged beyond economical repair, so it becomes quite expensive to do.

COB (chip on board) technology again dates back to the early 2000s, when manufacturers began to realise instead of being soldered to the PCB you could bond it to the PCB, so it bypassed the wave soldering process. With SMD you can have up to 3 diodes within a single chip, in COB you can have 9 or more diodes. Regardless of how many diodes are soldered on an LED substrate, a single COB LED chip has only two contacts and a circuit. This has greatly reduced the failure rate. One of the biggest advantages of COB is that it can produce higher brightness with lower power consumption per square inch when compared to DIP and SMD. One disadvantage COB has compared to SMD is that more expensive to produce than SMD, and has lower colour uniformity.

The two most important elements in an LED production line are the pick and place machine which puts the LEDs in place and the wave solder machine that passes the PCB through with the LEDs in place (but not attached). It is then heated to 272 degrees centigrade, and that melts the LED and flows the solder into the right position. “But if you’re at 280 degrees or 260 degrees, and you don’t solder it properly, you might get damaged solder joints, and so consequently, the screen will be unreliable for its entire life. By going to COB you’re not relying on soldering, so that element doesn’t matter. COB is also more resilient, with an SMD screen you handle it very carefully, with a COB screen you can hit it with your shoe, and it still won’t break,” says Burgess.

A GOB display uses almost the same production technology as SMD, it just adds a transparent glue to provide a shield which makes