what exactly do you mean by led ?

 

What exactly do you mean by"led" ?

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

In the most basic terms an LED ( led full form) is an electronic device that emits light when an electrical current is passing through it. The light is produced when the particles carrying electrons as well as holes (known by the names of electrons and holes) are incorporated into the semiconductor's semiconductor materials.

Since light is produced inside the semiconductor solid LEDs are described in terms of solid-state technology. The term "solid-state lighting" that incorporates organic LEDs (OLEDs) sets this technology of light sources other than that use hot filaments (incandescent and tungsten lamp and halogens) (or gas discharge) (fluorescent lamps).

Different colors
In the semiconductor of the LED, the electrons as well as holes are contained within energy bands. The band separation (i.e. it is also known as the bandgap) determines the energy of photons (light particles) which are released through the LED.

The energy of a photon determines the wavelength of light emitted and consequently the color. Different semiconductor materials with various bands emit various shades of light. The exact length (color) is altered through altering how light is emitted area or the active region.

LEDs are comprised of semiconductor compounds which are made up of elements of the group III and V from the periodic table (these are also known as III-V-based compounds). Some examples of III-V substances commonly employed in the manufacture of LEDs include gallium arsenide (GaAs) and gallium Phosphide (GaP).

In the beginning of the 1990s, LEDs were offered in a small selection of colors and, in particular white and blue commercial LEDs were not in use. The introduction of LEDs made from gallium nitride (GaN) technology widened the color spectrum and opened up an array of possibilities.

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

  • Indium Gallium Nitride (InGaN):blue, violet and green high-brightness LEDs.
  • Aluminium gallium Phosphide (AlGaInP):yellow, bright red and bright orange high-brightness 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 generate light that operates at least 90 percent better than conventional light bulbs. How do they work? A flow of electricity runs through the microchip. The microchip illuminates the tiny light sources we call LEDs. These results are visible light sources. To ensure proper performance the heat produced by LEDs is absorbed in the heat sink.

Lifetime of LED Lighting Products

The use-to-date of LED lighting equipment is different from that of other lighting sources, including incandescent lamps and 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 LED's brightness decreases gradually throughout. In contrast to bulbs that use incandescents, LEDs "lifetime" is established on an estimation of the time when light intensity decreases by 30 percent.

How are LEDs Used in Lighting

LEDs can be integrated into bulbs and fixtures for general lighting needs. Small in size, LEDs provide unique design opportunities. Some LED bulbs appear like traditional light bulbs, and they are more in line with the style of traditional light bulbs. Certain lighting fixtures with LEDs may include LEDs in order to serve as permanent lights. There are also hybrid methods which use a different "bulb" or replaceable light source that is designed specifically for a unique fixture. LEDs present a wonderful opportunity to innovate in lighting design and can be utilized to be employed in an array of different uses over traditional lighting technologies.

LEDs and Heat

LEDs make use of heat sinks that absorb the heat produced by the LED. They later release it into the surrounding environment. This prevents LEDs from overheating in the process of burning. Controlling temperature is often the primary aspect that determines the efficiency of an LED over its lifetime. The higher temperatures the LEDs are operated at, the quicker the light will degrade and the more time-consuming its use will be.

LED products employ a variety of different designs for sinks and designs to control heat. Nowadays, advances in materials allow manufacturers to create LED bulbs that are akin to the dimensions and shapes typical incandescent lamps. Despite the heat-sink design, the vast majority of LED bulbs that have been awarded recognition with ENERGY STAR are tested and certified to verify that they can manage the heat in order to ensure that the output of light is adequate until the end of its lifespan rated.

Find out more information about it here. led full form


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