what exactly do you mean by led ?
what exactly do you mean by led ?
A brief explanation of how light-emitting diodes function.
In its most basic form it is a light-emitting device ( led full form) is a semiconductor device that produces light when the current of electricity flows through it. The light is produced when the particles that carry this current (known as holes and electrons) combine within this semiconductor substance.
Because light is produced within the semiconductor solid LEDs are classified as solid-state electronics. Solid-state lighting that comprises organic LEDs (OLEDs) differentiates this lighting technology from the other lighting sources that rely on heating filaments (incandescent and tungsten lamp halogens) (or gas discharge) (fluorescent bulbs).
Different colors
Inside the semiconductors inside the LED the holes and electrons are contained within energy bands. The distance between the bands (i.e. that's the bandgap) determines the amount of intensity the photos (light particles) emit when they are powered by the LED.
The energy of a photon determines the intensity of the light and, therefore, the color. Different semiconductors with different bands produce various colours of light. The duration (color) can be altered by changing how light is emitted or active, area.
LEDs are comprised of compound semiconductors made up of elements that belong to group III and group V of the periodic table (these are also known as III-V compounds). Some examples of III-V compounds commonly employed to create LEDs include gallium arsenide (GaAs) and gallium phosphide (GaP).
Until the mid-90s LEDs had only a few colors, and in particular commercial blue and white LEDs were not available. The advent of LEDs made of the gallium nutride (GaN) technology completed the range of colors 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 green light bulbs
- 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 percent more efficiently than traditional incandescent light bulbs. What is their purpose? A voltage-driven current is pushed through a microchip which produces light that is small. We refer to them as LEDs. This output of light is known as visible. To ensure that the LEDs perform properly the heat generated by LEDs is transferred to a heat sink.
Lifetime of LED Lighting Products
The lifespan for LED lights is defined differently than different sources of light such as incandescent light and CFL, as well as CFL, or compact fluorescent light (CFL). LEDs do not typically "burn out" or fail. However, they can be susceptible to "lumen degrading" in which the light intensity of the LED decreases gradually as time. In contrast to traditional bulbs, the LED "lifetime" is established on a prediction of when the brightness decreases by 30 percent.
How are LEDs Used in Lighting
LEDs are used in bulbs and fixtures in order to give general light. Small in size, LEDs provide unique design opportunities. Certain designs of LED bulbs might look like traditional light bulbs, but seem more like the style of traditional light bulbs. Certain LED lighting fixtures contain LEDs that are an ongoing source of light. There are also hybrid options which use a different "bulb" or replaceable light source, and specially designed to make an original fixture. LEDs provide a wonderful opportunity to invent lighting forms elements and can be used in a greater scope of applications than traditional lighting technologies.
LEDs and Heat
LEDs use heat sinks to absorb the heat generated by the LED and disperse it to the surroundings. They prevent LEDs from overheating which could cause them be destroyed. Temperature management is often the most crucial element to the efficiency of an LED throughout its lifetime. As high the temperatures which the LEDs work the greater speed the light's performance will diminish and the shorter its useful duration of the LED will be.
LED lighting products utilize a range of different designs for heat sinks and designs for managing heat. Today, advancements in materials allow manufacturers to create LED bulbs that are akin to the shape and size of traditional incandescent bulbs. No matter the heat sink shape or design the majority of LED products that have been awarded the ENERGY STAR have been tested to verify that they have the proper capacity to handle heat to ensure that the light output is kept at a consistent level until the expiration date of their duration.
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