Yardsticks To Evaluate The Quality Of An Outdoor LED Screen Display

What are the yardsticks to evaluate the quality of an outdoor LED screen display?

 

An outdoor LED display is an imperative part of the modern advertising methodologies. Businesses around the world are using outdoor signage for effective results and better return on investment. There is no doubt about the effectiveness of outdoor LED screens. However, to ensure the results, it is important to have the best quality of outdoor LED screens. If you wondering, how can you calculate the quality of an LED screen, then you have come to the right place. In this article, we are going to tell you how to evaluate the quality of an outdoor LED screen display.

 

There are several parameters that have a direct impact on the quality of the outdoor led screen. In order to ensure the high quality of the screen, every parameter carries value. We are going to give provide you with complete details of these parameters, thus making it possible for you to comprehend and understand the context and importance of these parameters.

 

Fundamental parameters to evaluate the Quality of outdoor LED screen Display

 

The fundamental parameters for outdoor LED quality include the LED chip brand, the type of PCB, power supply brand, characteristics of the cabinets and finally the type of LED. They are the basic ingredients to buy a good outdoor LED screen. However, very few know the difference between these characteristics and the importance they hold. Most people consider them as one, thus they don’t pay much attention to them.

 

How to Choose the LED Chip Board

 

                  led display

 

 

LED displays are low on power, they have environment-friendly and they can be recycled. All these characteristics make them consumers first choice. Choosing the right LED chipboard is imperative as it will ensure life-longevity, improved performance and enhanced productivity. Conversely, the important question here is how to choose the right LED chipboard.

The chip of an LED is going to have a direct impact on the retention of the quality of the image over time. The key point to remember here is the most expensive option is not always the best option. Some of the big names for LED chip manufacturers include the following

  • Silan (China)
  • Epistar (Taiwan)
  • AXT(USA)
  • Cree(USA)
  • Nichia(Japan)

 

According to the current market trends, the best chips are the ones by Nichia. Nichia chips offer outstanding image quality, but they are extremely expensive as well. The price of LEDs varies on average, ranging from one cent per LED to almost about 15 percent and so on. The shift in price depends on the LED, for instance, RGB LED’s with three chips present at one time is going to be very expensive.

 

All LED chips manufacturers tend to differentiate themselves via different sensitivity levels to the effects of the electrostatic discharge. Manufacturers implement numerous safeguarding measures ESD in their production processes in order to prevent display failures that are mainly due to the electrostatic discharges.

 

The table below shows different LED chips and the voltage their respective LED can withstand in case of electrostatic discharges.

 

 

LED Chips

Electrostatic Discharge

Cree

2000V

Nichia

1000V

Taiwanese LED Chips

800V

Chinese LED Chips

200-800V

 

Weather impact on Chips

 

Weather plays an important role in determining the right LED chip. If you opt for poor LED chips, they will fade faster in extreme weather conditions. These chips will reduce the services of life when they come across high-temperature variations. The temperature can become extremely cold or hot depending on the country, or the season. A poor LED chip is bound to create a premature fading of the overall outstanding and expensive LED screen.

 

LEDs’ general service life often lies between 50,000 to 100,000 hours. It equates to about 10 years of continuous display operations at full brightness. If you choose weak LED chipboard, the services are likely going to last that long.

 

Every chip does have brightness reducing due to aging. Some chips age gracefully in comparison to other chips. Below is the table that shows the lighting reduction that arises within the first 100,000 hours. The chips are sorted by manufacturer name.

 

 

 

Nichia-Japan

Cree-USA

AXT-USA

Silan-China

Epistar

Red

2.5%

Unknown

Not known

Unknown

28%

Green

2,50%

26%

8%

7%

28%

Blue

2,50%

45%

8%

7%

28%

 

Recommendations

 

For outdoor advertising LED screens, you do not want high quality as for stages or television. The consumers are less likely to invest a huge amount of money as the screens are seen as an investment to shorten the ROI to no more than a year. The idea is to use the screen for product and service advertising for about 5 to 8 years and then gain from an advertisement or about 5 to 8 years.

 

The right type of PCB

 

PCB’s color defines the color of the solder mask or the solder oil. It generally consists of the lacquer impregnated with pigments. These pigments protect the traces of bare copper. PCB’s finishing color is made from glass, expoxy and it represents the solder mask. Solder mask is responsible for preventing short-circuiting of the circuit board.

PCB comes in different colors, and we are going to provide you with concise information about these types.

 

Types of PCB colors

 

You will find different types of colors available for PCB boards and the most famous and the standard color for printed circuits boards is the green solder mask. Nonetheless, the advancement in technology and with the advent of much innovation, the PCB’s colors are not changing.

Previously the assemblers were trying to use other colors instead of green for the PCB. Below are the reasons for choosing different colors instead of the standard green color.

To make the user aware of the revision changes, we recommend using different colors of PCB.

If a different color is used, it will produce a contract or brightness. What we need to understand id that assembles equipment is significant by light reflectance, absorbance, and transmission properties.

 

                           led sign

 

Use Colors other than Green

 

Using color, other than green will prevent the mistakes that generally arise due to mixed assemblies. In addition, the different color type can help identify assemblies that are lead-free.

The colors that companies use for fabricating of PCB includes red, yellow, black, blue, white, etc. Generally, the organizations, call the call of colors of PCBs the PCB color code.

The modern PCB types did adopt specific colors, for instance, motherboards of PC are still using the green epoxy. These colors of the solder mask do not have any impact on the performance of the PCB. Therefore, regardless, you use a black or a white, or a chip-solder mask color, the performance of the chip is going to remain the same.

Although, do remember that different PCB colors are going to have different board resolution. For instance, the yellow and black colors have significantly less resolution in comparison to the regular green and red colors. Solder mask with clear transparency are usually the ones with the highest resolutions.

You should always opt for a multi-layer PCB for LED displays for effective and efficient results. Make sure that the multi-layer PCB for the LED should be UL approved and it should be manufactured in ISO-9001 certified facilities. In addition, these PCBs should go through high voltage E-Test, photo-electricity balance, copper thickness tests, and much more.

 

Choose the Right Power Supply

 

The proliferation of high-brightness LED displays requires equal if not, greater proliferation of power supplies. With so many products and manufacturers on the market, finding the right power supply for your outdoor LED can really turn out to be a troublesome task.

Making sense of all the power rating, output current, output voltages, input voltage, and many others could be complex. We will provide you with short, yet easy to understand guide on how to choose the right power supply for your outdoor LED display.

 

Understanding of Power Supply

 

To select the best type of power supply for your particular project, you need to understand the nature of your application first. You need to answer a question like where and how to deploy the application, what form of LED lighting the application will use etc.

To determine the power supply for outdoor LED screens, you need to pay heed to IP rating, an appropriate level of protection against water spray, moisture, dust, and solid objects.

Knowing the basic LED helps to determine the right power supply. The light emitting diode is a semiconductor device and when a current flows across the P-N junction, the device emits lights. The optimum performance of the forward voltage is typically around 3 V. However, it is important to remember that the relationship of current t voltage is non-linear. In addition, the relationship with forwarding current and a measure of light output (luminous flux) are non-linear. Therefore, driving LED with higher current will increase the light output, but it is highly inefficient in comparison to using multiple LEDs in order to achieve the same results.

Remember the temperature also affects the results; the increase in its temperature will cause a decrease in the forward voltage, thus making the entire operation less efficient.

The power rating of an LED bulb might be fifth or less in comparison to the traditional incandescent light while generating the same results. There is a difference in power requirements. The power requirements range from a few watts to a hundred watts or so. The most power supply does come with protection against over temperature, over voltage, over current, short circuits, etc. Consider all these economic and environmental factors before deciding on the power supply.

 

                               

                            

                              led sign     

 

The Cabinet

 

An LED cabinet should be able to withstand extreme weather conditions. They should be able to protect the hardware of outdoor LED signs. In modern times, Aluminum and steel plates are widely adopted in order to create cabinet panels for different LED displays.

The cabinets are also known as the sheet metal. LED cabinets are available in different sizes and shapes. Choose the one that suits your needs to perfection.

 

Different Types of LED Displays

 

There are different types of LED screen display available. We did list some of these types below.

  • Outdoor LED Message Signs
  • LED strip video screens
  • LED Mesh Curtain Video Wall
  • Flexible LED screens
  • Stadium Screens
  • Sports Displays
  • Fixed outdoor LED screens
  • Fixed Indoor Led Screens
  • Controlling the LED Matrix
  • Dot Matrix LED Display
  • 7-Segment LED Display

 

When choosing the type of the LED screen, make sure that you have the right resolution, pixel pitch, and other factors. For further details on a resolution for out displays, check out the article “How to choose the best resolution for highway billboards”

 

Summary

 

Outdoor LED displays play an important role in determining the success of the advertisement. The outdoor LED signs increase the return on investment and generate more foot traffic. However, these signs are effective only if you use the right quality.

Determining the right quality of outdoor LED screens require research. There are several parameters that need consideration in order to evaluate the quality of an outdoor LED screen display. However, the most important out the fundamental factors including the power supply brand, the chipboard of the LED, the PCB, and the type of LED.

Most people are unaware of their importance while evaluating the quality of an outdoor LED screen. They tend to confuse these factors with one another. However, each factor is important at an individual level. These factors together define the quality of the screen.

 

 

 

share