tools o convert length

 

What do you mean by"led" ?

An introduction to the way light-emitting diodes function.

In its most basic form, it's a device that emits light ( led full form) is an electronic device that emits light when an electric current flows through it. Light is created when particles that carry the current (known as electrons and holes) are mixed within the semiconductor material.

Because light is generated inside the semiconductors, solid LEDs are considered to be solid-state electronic. Solid-state lighting, that includes organic LEDs (OLEDs) differentiates this lighting technology apart from different sources of light, which use heater filaments (incandescent as well as tungsten lamp Halogens) (or gas discharge) (fluorescent bulbs).

Different colors
In the semiconductor inside the LED the holes and electrons are contained within energy bands. The distance between these bands (i.e. the bandgap) determines the amount of intensity the light particles (light particles) emit from the LED.

The energy of the photon determines the wavelength of light emitted and, as a result, the hue. Different semiconductor materials that have different bands emit different hues of light. The exact length (color) is altered through changing how light is emitted, or active, area.

LEDs are composed of compound semiconductors made up of elements that belong to group III as well as group V in the periodic table (these are referred to as III-V substances). The most common III-V substances used to make LEDs include gallium arsenide (GaAs) and gallium Phosphide (GaP).

In the early 90s, LEDs were available in only a few colors. In particular, commercial white and blue LEDs were not readily available. The introduction of LEDs based on the gallium Nitride (GaN) technology expanded the color spectrum and opened up a range of new options.

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

  • Indium Gallium Nitride (InGaN):blue, ultraviolet, and high-brightness light bulbs that are green.
  • aluminum gallium Phosphide (AlGaInP):yellow, high-brightness orange and red 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 produce light that can be up to 90 % more efficient than conventional incandescent bulbs for lighting. What is their purpose? A current that is driven by voltage is pushed through a microchip which creates light that is small. We refer to them as LEDs. They emit visible light. To ensure that the LEDs function properly, the heat produced by LEDs is transferred to the heat sink.

Lifetime of LED Lighting Products

The duration for LED lights is determined differently from different sources of light, such as incandescent light and CFL, as well as CFL, or compact fluorescent light (CFL). LEDs typically do not "burn out" or fail. They are instead susceptible to "lumen degradation" where the brightness of the LED decreases gradually as time. In contrast to traditional bulbs, the LED "lifetime" is established on an estimate of when the brightness decreases by 30 percent.

How are LEDs Used in Lighting

LEDs are integrated into fixtures and bulbs for general illumination. Small in size, LEDs provide unique design opportunities. Some LED bulb designs might look like conventional lighting bulbs, and have more of the look of traditional lighting bulbs. Certain LED lighting fixtures contain LEDs that function as an ongoing source of light. There are also hybrid options which use a different "bulb" or replaceable light source specifically designed to create an original fixture. LEDs offer a great opportunity to create new lighting design elements and can be used in a greater range of applications than conventional lighting technologies.

LEDs and Heat

LEDs use heat sinks to absorb the heat produced by the LED, and then disperse it into the surrounding environment. The heat sinks stop LEDs from overheating and causing them to melt out. The management of temperature is usually the most important factor in the performance of an LED throughout its life. As high the temperatures at which LEDs function the faster the light's quality will decrease and the less useful lifespan will be.

LED lighting fixtures utilize a range of designs for heat sinks and designs for managing heat. Modern advances in materials allow manufacturers to create LED bulbs that are similar to the size and shape that traditional bulbs. Whatever the heat sink shape or design the majority of LED products that have been awarded the ENERGY STAR have been tested to ensure that they are able to manage heat to ensure that the light output is maintained to the expiration date of their life span.

Read more about it here. led full form


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