what exactly do you mean by led ?
What is an led ?
A basic outline of how light emitting diodes function.
In the most basic terms the most basic way to describe it is to describe a light-emitting diode ( led full form) is a semiconductor device that emits light when an electric current flows through it. The light is created when the particles carrying this current (known as electrons and holes) are incorporated into the semiconductor material.
Because light is produced within the semiconductor , solid LEDs are often referred to as solid-state devices. Solid-state lightingthat also includes organic LEDs (OLEDs) is what distinguishes this kind of light from other sources that use glow filaments heated (incandescent and the tungsten halogen lamps) as well as gas discharge (fluorescent bulbs).
Different colors
In the semiconductor of the LED the electrons and holes are contained within energy bands. The distance between the bands (i.e. that's what is known as the bandgap) determines the intensity of the photons (light particles) that are released by the LED.
The energy of the photon is the key to determining the strength of the light, and consequently, the color. Different semiconductors that have different bandgaps emit various colors of light. The exact wavelength (color) can be controlled by altering the composition of light emitting or active area.
LEDs are composed of semiconductor compounds that comprise elements belonging to the group III and V in the periodic table (these are known as III-V-based substances). The most popular III-V substances that are used in the production of LEDs include gallium arsenide (GaAs) and gallium Phosphide (GaP).
The market for LEDs was limited in colors and, specifically commercial blue and white LEDs were not available. The introduction of LEDs that were that were built on the gallium-nitride (GaN) materials system boosted the color options and allowed for a variety of new possibilities.
Main LED materials
The most important semiconductor materials that are used to create LEDs are:
- Indium gallium Nitride (InGaN):blue, ultraviolet and green high-brightness LEDs
- Aluminum 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 produce light as high as 90% more effectively than traditional light bulbs. What is their purpose? A current of electricity is passed through the microchip. It then illuminates the tiny LEDs that light up the. This is visible lighting. To make sure that the LEDs function correctly, the heat produced by the LEDs is taken up by a heat sink.
Lifetime of LED Lighting Products
The duration for LED sources of light is determined differently from different sources of light, such as incandescent light and CFL, as well as compact fluorescent light (CFL). LEDs typically do not "burn out" or fail. Instead, they undergo 'lumen depreciation' which occurs when the brightness of the LED decreases gradually over. In contrast to incandescent bulbs, the LED's "lifetime" is established on the basis of when the brightness drops by 30 percent.
How are LEDs Used in Lighting
LEDs are used in fixtures and bulbs for general lighting purposes. Small in size, LEDs provide unique design opportunities. Some LED bulb designs may physically resemble traditional light bulbs, and could enhance the appearance that traditional bulbs. Certain lighting fixtures made of LED could contain LEDs that provide an eternal light source. Additionally, there are hybrid options that use a non-traditional "bulb" or replaceable light source is used and made for a specific fixture. LEDs offer a great possibility for innovative lighting design and are utilized in a wider variety of applications than conventional lighting technologies.
LEDs and Heat
LEDs utilize heat sinks to absorb the heat generated by the LED, and then disperse it to the environment around it. This prevents LEDs from burning out. Control of temperature is usually the most important element in the performance of an LED throughout its lifespan. The higher the temperature that LEDs operate at the higher the temperature, the faster the light's efficiency will decrease and the shorter the period of use will be.
LED bulbs utilize a variety of new designs for heat sinks and configurations that control the heat. Modern advances in materials allow manufacturers to create LED bulbs that are akin to the dimensions and shapes of conventional incandescent bulbs. Whatever the design of the heat sink the majority of LED bulbs that have been given the ENERGY STAR have been tested to ensure that they are able to manage heat so that the lighting output is maintained until the end of their lifespan.
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