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what exactly do you mean by led ?
An introduction to the way light-emitting diodes operate.
In its simplest sense, it's a device that emits light ( led full form) is one of the semiconductor devices that emits light when an electric current is passing through it. Light is produced when particles carrying the current (known as electrons and holes) combine within this semiconductor material.
Since light is produced inside the semiconductor solid LEDs are classed as electronic devices that are solid state. Solid-state lighting that comprises organic LEDs (OLEDs) distinguishes this lighting technology apart from the other lighting sources that utilize heater filaments (incandescent or tungsten lamps Halogens) (or gas discharge) (fluorescent bulbs).
Different colors
Inside the semiconductor inside the LED the electrons and holes are contained within energy bands. The distance between these bands (i.e. that's the bandgap) determines the brightness of the photos (light particles) that are emitted by the LED.
The energy of the photon determines the intensity of the light and, as a result the hue. Different semiconductors with different bands emit various shades of light. The exact wavelength (color) may be changed by changing its structure in the emitting, or active, area.
LEDs are comprised of compound semiconductors made up of elements that belong to group III, and V within the periodic table (these are referred to as III-V substances). Some examples of III-V compounds commonly employed in the creation of LEDs include gallium arsenide (GaAs) and gallium Phosphide (GaP).
Until the mid-90s LEDs had a limited range of colors, and in particular commercial blue and white LEDs were not widely available. The development of LEDs made of the gallium Nitride (GaN) technology expanded the colors available and opened up a range of new options.
Main LED materials
The main semiconductor materials used to make LEDs are:
- Indium gallium Nitride (InGaN):blue, ultraviolet, and high-brightness light bulbs in green.
- aluminum gallium Phosphide (AlGaInP):yellow, high-brightness red and orange 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 emit light that works at least 90 percent more efficient than conventional incandescent light bulbs. What exactly do they do? A voltage-driven current runs through a microchip which produces light that is small. which we call LEDs. Their output can be described as visible light. To ensure that the LEDs are working properly, the heat produced by LEDs is transferred to an energy sink.
Lifetime of LED Lighting Products
The time-to-life of LED lighting devices is determined differently than various other light sources like incandescent and CFL, as well as the compact fluorescent light (CFL). LEDs generally do not "burn out" or fail. They are instead susceptible to "lumen degradation" in which the light intensity of the LED diminishes slowly over time. Contrary to conventional bulbs, LED "lifetime" is established on an estimate of when the illumination decreases by 30.
How are LEDs Used in Lighting
LEDs are integrated into fixtures and bulbs that provide lighting general. Small in size, LEDs provide unique design opportunities. Some LED bulb designs could look similar to conventional lighting bulbs, and have more of the style of traditional light bulbs. Certain LED lighting fixtures contain LEDs that provide a continuous light source. They also offer hybrid solutions which use a different "bulb" or replaceable light source. The design of the light source is utilized and specifically designed to make an original fixture. LEDs present a unique opportunity to innovate in lighting form aspects and are able to be utilized in a wider variety of applications than traditional lighting technologies.
LEDs and Heat
LEDs utilize heat sinks to absorb the heat generated by the LED and release it out to the surrounding. The heat sinks prevent LEDs from becoming overheated which could cause them melt out. The management of temperature is generally the most important factor in the success of an LED throughout its life. The higher the temperature which LEDs function the greater speed the light's efficiency will decline and the less useful lifespan will be.
LED lighting fixtures incorporate a range of different designs for heat sinks and designs for managing heat. Modern advances in materials allow for the development of LED bulbs that look similar to the size and shape that traditional bulbs. In spite of the heat sink's design and shape the majority of LED products that have been awarded the ENERGY STAR have been tested to determine if they are able to manage heat so that light output is maintained to the expiration date of their lifespan.
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