what exactly do you mean by led ?

 

What does "led" mean? ?

An extremely brief overview of the workings of a light-emitting diode.

In its simplest and easiest way to think of it is that a light-emitting diode ( led full form) is an electronic device that emits light when an electric charge passes through it. The light is created when the particles carrying this current (known as holes and electrons) are incorporated into the material of semiconductor.

Since light is produced inside the semiconductor , solid LEDs are known as being in a solid state. They are also known as "solid-state lighting," that also includes organic LEDs (OLEDs) is what distinguishes this kind of lighting from others using glowing filaments that are heated (incandescent and tungsten Halogen lamps) as well as gas discharge (fluorescent lamp).

Different colors
The semiconductor component used in the LED the electrons and holes are encased within energy band. The separation of the bands (i.e. that is the bandgap) is the measure of the intensity of the photons (light particles) that are released are released from an LED.

The photon's energy determines the wavelength of light emitted and, consequently the hue. Different semiconductor materials that have different bandgaps generate different shades of light. The precise wavelength (color) can be altered by changing how light is emitted, or active area.

LEDs are made up of compound semiconductors, composed of elements that belong to the groups III and V in the periodic table (these are often referred to as III-V substances). The most popular III-V substances utilized to produce LEDs comprise gallium arsenide (GaAs) and gallium Phosphide (GaP).

In the early 90s LEDs were only available in a limited number of shades, and commercial white as well as blue LEDs were not available. With the introduction of LEDs that were based on gallium-nitride (GaN) materials system broadened the palette of colors and made for a range of different possibilities.

Main LED materials
The most important semiconductor materials that are used in the manufacture of LEDs are:

  • Indium gallium Nitride (InGaN):blue, ultraviolet, and green high-brightness LEDs.
  • Aluminium Gallium Phosphide (AlGaInP):yellow, high-brightness red and orange LEDs
  • Aluminum gallium arsenide (AlGaAs):red and infrared LEDs
  • Gallium Phosphide (GaP):yellow and green LEDs

Learn About LED Lighting

The Basics of LED Lighting

What are LEDs and how do they work?

LEDstands for light emitting diode. LED lighting products emit light that is up to 90% more efficiently than incandescent light bulbs. What's the reason for them? A current of electricity moves through a microchip. This creates small amounts of light. They are also known as LEDs. They emit visible light. To avoid performance issues the heat generated by LEDs is then absorbed into a heat sink.

Lifetime of LED Lighting Products

The time-to-life that LED light fixtures is different than other sources of light such as incandescent or CFL or Compact fluorescent light (CFL). LEDs generally do not "burn out" or fail. Instead they undergo 'lumen depreciation which means that the LED's brightness decreases gradually over time. Contrary to the incandescent bulbs, LEDs "lifetime" is established on an estimate of when the brightness drops by 30 %.

How are LEDs Used in Lighting

LEDs are integrated into fixtures and bulbs for general lighting needs. Small in size, LEDs provide unique design opportunities. Certain LED bulb options might visually resemble traditional light bulbs and they could be a better match for the look of conventional lighting bulbs. Certain LED lighting fixtures could include LEDs that can be used as an endless light source. There are also hybrid lighting solutions that make use of an unconventional "bulb" or replaceable light source is employed and specifically created to create a unique fixture. LEDs give you a chance to be innovative in the design of lighting and can be used in a variety of ways than traditional lighting technologies.

LEDs and Heat

LEDs use heat sinks to absorb the heat produced by the LED and afterwards disperse it to the environment. This prevents LEDs from overheating and burning out. The control of thermal energy is usually the most critical element to the performance of LEDs throughout its lifespan. The more heated the LEDs function, and the more quickly the light's performance will decrease and the lesser the lifespan of the LED will be.

LED bulbs use a variety of different designs for heat sinks and configurations to manage heat. Modern advances in materials allow manufacturers to create LED bulb that have shapes akin to the sizes and shapes of conventional incandescent bulbs. Whatever the shape of the heat sink the majority of LED products that have been awarded the ENERGY STAR have been tested to confirm that they can regulate the heat to ensure that the light output is kept up until the end of their rated lifespan.

Learn more about it here. led full form


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