what exactly do you mean by led ?

 

What do you mean by"led" ?

A very basic introduction to the inner workings of a light-emitting diode.

In its simplest terms, the simplest definition, an LED ( led full form) is an electronic device that produces light when an electric current passed through it. The light is produced when the particles carrying electrons as well as holes (known by the names of electrons and holes) are integrated into the semiconductor's materials.

Because light is generated inside the semiconductor , solid LEDs can be described as solid-state technology. The term "solid-state lighting" which also comprises organic LEDs (OLEDs) is a method of separating this type of light from other sources with heated filaments (incandescent and tungsten lamp Halogens) (or gas discharge) (fluorescent lamps).

Different colors
In the semiconductor of the LED, the electrons and holes are contained in energy bands. Band separation (i.e. that's what is known as the bandgap) is the key to determining the energy level of the photons (light particles) which are released by the LED.

The energy of the photon determines the wavelength of light emitted and the consequent hue. Different semiconductor materials with various bands emit different shades of light. The exact length (color) is altered through changing structures of light-emitting area or the active region.

LEDs are composed of semiconductor compounds, made up of elements belonging to the group III and V in the periodic table (these are also referred to as III-V-based substances). The most common III-V materials employed in the manufacture of LEDs include gallium arsenide (GaAs) and gallium Phosphide (GaP).

In the beginning of the 90s, LEDs were available in a limited range of colors , and in particular white and blue commercial LEDs were not used. In the 1990s, LEDs that were made from the gallium Nitride (GaN) technology broadened the color spectrum and opened up an array of possibilities.

Main LED materials
The most important semiconductor materials used to make LEDs are:

  • Indium Gallium Nitride (InGaN):blue, green , and ultraviolet high-brightness LEDs.
  • Aluminum gallium Phosphide (AlGaInP):yellow, bright orange and bright red light sources
  • Algalium 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 produce light that can be up to 90 % more efficient than traditional light bulbs. What is their purpose? A electric current flows through the microchip. The microchip is able to illuminate small light sources that are referred to as LEDs. The result is visible light. To prevent problems with performance, the heat generated by LEDs is absorbed by the heat sink.

Lifetime of LED Lighting Products

The lifespan of LED lighting equipment differs from other sources of light, such as incandescent or CFL, the compact fluorescent lamp (CFL). LEDs typically do not "burn out" or fail. They are more prone to 'lumen depreciation' which occurs when the brightness of LEDs decreases slowly over. In contrast to incandescent bulbs, the LED's "lifetime" is established on an estimate of when the brightness drops by 30 percent.

How are LEDs Used in Lighting

LEDs are integrated into bulbs and fixtures to provide general lighting. Small in size, LEDs provide unique design opportunities. Certain LED bulbs can appear like traditional light bulbs, and they are more similar to the design of traditional lighting bulbs. Certain lighting fixtures made of LED may contain LEDs to provide permanent light sources. There are also hybrid methods which use a different "bulb" or replaceable light source and are specially designed for a specific fixture. LEDs offer a great chance to create new lighting designs and can be used to be used in many different applications than traditional lighting technology.

LEDs and Heat

LEDs utilize heat sinks to absorb the heat generated by the LED and later disperse it to the surrounding surroundings. This stops LEDs from overheating and burning out. Control of temperature is usually the most important aspect that determines the performance of LEDs throughout its lifespan. The higher the temperature that LEDs operate at the faster the light will decrease in brightness and the less efficient its use time will be.

LED bulbs utilize a variety of designs for heat sinks and designs to control the heat. Modern advances in materials allow manufacturers to create LED lamps that have shapes similar to the sizes and forms that traditional bulbs. Despite the heat-sink design, the majority of LED bulbs that have been awarded certification with the ENERGY STAR were tested in order to confirm that they can handle the heat so that the output of light is sufficient until the end of their life.

Find out more information about it here. led full form


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