what exactly do you mean by led ?

 

What is "led" mean? ?

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

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

Because light is produced in the semiconductors of solid LEDs, they are also referred to as devices in the solid state. "Standard-state lighting" or "solid-state lighting," that also includes organic LEDs (OLEDs) is what differentiates this type of light from other sources made up of glowing filaments heated (incandescent and tungsten Halogen lamps) and gas discharge (fluorescent lamp).

Different colors
In the semiconductor material used in the LED the electrons and holes are encased within energy band. The separation of the bands (i.e. that's called the bandgap) is the measure of the intensity of photosns (light particles) release by the LED.

The energy of the photon determines the wavelength of light released and, therefore, the shade. Different semiconductor materials that have different bandgaps emit different shades light. The wavelength (color) can be altered by altering the composition of the light emitting, or active region.

LEDs are made of compound semiconductors made up of elements that belong to the groups III and V within the periodic table (these are also known as III-V substances). The most well-known III-V compounds that are used to construct LEDs are gallium arsenide (GaAs) and gallium Phosphide (GaP).

In the beginning of the 90s, LEDs were only available in a handful of colors , including commercial white and blue LEDs were not readily available. The introduction of LEDs made of the gallium-nitride (GaN) material system expanded the color spectrum and provided for a range of different possibilities.

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

  • Indium gallium Nitride (InGaN):blue, ultraviolet, and green high-brightness LEDs.
  • Aluminium gallium Phosphide (AlGaInP):yellow, red and orange high-brightness LEDs
  • 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 emit light up to 90% more efficiently than traditional incandescent light bulbs. What's the reason for these lights? A flow of electrical energy flows through a microchip. This creates very tiny amounts of light. called LEDs. The output is visible light. To prevent performance issues, the heat that LEDs generate is then absorbed into a heat sink.

Lifetime of LED Lighting Products

The life span of LED lighting devices differs than other sources of light such as incandescent or CFL, also known as CFL, or compact fluorescent light (CFL). LEDs are not able to "burn out" or fail. Instead, they experience 'lumen depreciation' which is the process where the LED's brightness decreases gradually over time. In contrast to bulbs that use incandescents, the LED's "lifetime" is established on an estimate of the moment when the brightness decreases by 30 percent.

How are LEDs Used in Lighting

LEDs can be integrated into bulbs and fixtures for general lighting requirements. Small in size, LEDs provide unique design opportunities. Certain LED bulb types may visually resemble traditional light bulbs , and could enhance the appearance of traditional lighting bulbs. Certain LED lighting fixtures may include LEDs that can be used as an endless light source. In addition, there are hybrid solutions that use an alternative "bulb" or replaceable light source is employed and specifically designed to create an unusual fixture. LEDs are a fantastic way to create new lighting designs and can be used for a wider range of applications than traditional lighting technologies.

LEDs and Heat

LEDs use heat sinks to absorb the heat produced by the LED and then release it into the surrounding environment. This prevents LEDs from overheating in the process of burning. The management of heat is typically the most important aspect in the performance of LEDs throughout its lifetime. The hotter the LEDs work, the more the light's performance decreases and the lesser the lifespan of the LED will be.

LED bulbs make use of a variety of different designs as heat sinks and configurations for managing heat. The advancements in technology allow manufacturers to create LED bulbs that are similar to the dimensions and forms of conventional incandescent bulbs. No matter what the shape or design of the heat source, the majority of LED bulbs that have been recognized with the ENERGY STAR have been tested to ensure that they are able to handle heat in a way that ensures that the light output is kept up until the end of their expected lifespan.

Learn more on it in this article. led full form


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