What is an LED? How does it work?  How do I know what product for me? Are you asking yourself the right questions? 

Let us help you understand LED a little more. PixelDiode prides itself on carrying products for virtually any type of installation. 

In today’s digital world, LED can be utilized for basic messaging, all the way to high-resolution video playback.From concerts and events, to permanent install for advertising or branding in your retail or corporate environment, LED can transform your space to an unforgettable one.

What is an LED?

In the simplest terms, a light-emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. Light is produced when the particles that carry the current (known as electrons and holes) combine together within the semiconductor material.


Indoor LED Displays:

SMD Red Green Blue LEDs in one package. 

SMD LED Advantages:

  • Wide-viewing angle
  • No color shift at extreme viewing angles
  • Smooth color from short distance
Outdoor LED Displays:

DIP Individual Red, Green, Blue, White LEDs

DIP LED Advantages:

  • Weather proof
  • Extremely bright
  • Great for longer viewing distance

Main LED materials

      The main semiconductor materials used to manufacture LEDs are:    

    •  Indium gallium nitride (InGaN): blue, green and ultraviolet high-brightness LEDs
    • Aluminum gallium indium phosphide (AlGaInP): yellow, orange and red high-brightness LEDs
    • Aluminum gallium arsenide (AlGaAs): red and infrared LEDs
    • Gallium phosphide (GaP): yellow and green LEDs


Determining the right brightness for your application is extremely important. Having a screen that is not bright enough, or too bright, can render your installation useless and ineffective. Here are a few things to consider when designing your LED wall:

    • Indoor Brightness: 1000-1500 nits is enough for most indoor use.
    • Outdoor Brightness at close viewing: 2000-3000 nits is usually enough for most situations.
    • Outdoor Brightness with direct sun: up to 5,000 + nits should be enough in most situations.

Resolution Vs Viewing Distance

Understanding how viewing distance and resolution co-related can not only help you better pair yourself with the right product but also save you a ton of money. Viewing distances are somewhat subjective, but can roughly be calculated based on the display type and the distance from the display. Each display will have a recommended minimum viewing distance that may vary based on application and your intended use.

Resolution is the physical distance measured in millimeters from the center of one led to its closest neighboring led. The higher the number, the less pixels and the lower the resolution; the smaller the number, the more pixels and higher the resolution. Let’s take one more step. Resolution is the number of pixels contained in the physical area of your LED display. The more pixels you have per square meter, the more detail your wall will display. Overall resolution is determined by display size, pixel technology, pixel pitch and viewing distance.


LED is a very energy-efficient technology, which is why energy-saving LED bulbs are so popular today. The quantity of power consumed by the diodes in an LED display is determined by the display’s kind, brightness, and usage.

LEDs and displays come in a variety of shapes and sizes. For example, the power consumption of an interior display will differ from that of an outdoor digital sign that must be viewed in direct sunlight. The display’s brightness is also a significant element. The visuals must be crisp, yet the display’s brightness should not dazzle. In the sunshine, an outdoor LED display must be significantly brighter than when darkness falls.

What is portrayed has an impact as well. LED displays show images by turning on and off coloured diodes and altering their brightness. White text on a black background will require significantly more lit diodes – and far more electricity – than white text on a white backdrop.


It’s tough to tell how long an LED display will last because there are so many variables at play. A display, on the other hand, can easily endure more than ten years if properly maintained. Life expectancy is determined by everyday use and the environment around the display, as it is with all forms of electronics. Darker images with a lower degree of brightness are more wearable on the display than lighter ones with a higher level of brightness. Factors such as humidity and atmospheric salt concentration can also have a role.

The light output from the diodes in an LED display will gradually decrease with time. How much depends on the diode’s type and generation. Because many LED displays never use their full light output, downsizing is rarely an issue.


RGB is short for Red, Green and Blue. It is a colour scheme that exploits the fact that all visible colours can be mixed from these three basic colours. It is used in almost all types of displays, including LED displays.


Surface Mount Device is the abbreviation for Surface Mount Device. These are electrical components that are surface mounted directly on a printed circuit board, rather by soldering the metal pin on the circuit board’s underside, as in the past.

The SMD principle is employed in LED display technology in a slightly different way. The red, green, and blue diodes of an SMD display are potted in a tiny plastic encapsulation that is surface mounted on the show’s printed circuit boards. Because the diodes are encased in this way, they take up much less space, allowing for displays with tighter diode spacing and better resolution.



When analysing the luminance of an LED display, the nit measurement is utilised. Candela per square metre is also known as nit. The SI unit of brightness is the candela (metre system). It’s a metric that takes into account how the human eye perceives the brightness of various colours. As a result, when measuring the brightness of a display, it is the most obvious unit to employ. A candela is the amount of light emitted by a standard candle.

Electromagnetic Compatibility (EMC) is an acronym for Electromagnetic Compatibility. It’s electrical engineering research that looks into the effects of electromagnetic radiation from electrical devices. To a greater or lesser extent, all electrical equipment produce radiation. Humans are not affected by the radiation, but other electrical gadgets may be. When you place a cell phone near an old speaker, an audible noise is produced.