Light Emitting Diodes have many uses but some of their uses are as follows. Using a semiconductor circuit called a diode, an LED produces light in a variety of colors, depending on the materials used in its manufacture. This page was last changed on 30 December 2020, at 11:36. 6.Small size and portability: They are small in size and can be stacked together to form an alphanumeric display. A light-emitting diode (LED) is an efficient electrical means of creating light. Contact Us This means it operates only when a forward voltage is applied to it. Electrons and holes are connected at the junction. The color of the light depends on the chemical composition of the semiconducting material used, and can be near-ultraviolet, visible or infrared. The power supply to the p-n junction biases the diode forward and pushes the electrons from n-type to p-type. This effect is a kind of electroluminescence.[2]. Used in digital clocks and in calculators. Under certain specific conditions of producing the light, solid state procedures can produce a coherent light, similarly as in laser diodes. Light Emitting Diode (LED) Definition: The LED is a PN-junction diode which emits light when an electric current passes through it in the forward direction. An LED is a type of p n junction diode that works on the principle of electro-luminance. Learn how an LED works, its working principle, and the difference between it and pn diodes. They are efficient - most of the energy turns into light, not heat. It wasn’t until 1962 that Nick Holoniac came up with the idea of ​​a light diode, and he was working for a general electric company. From Simple English Wikipedia, the free encyclopedia, https://simple.wikipedia.org/w/index.php?title=Light-emitting_diode&oldid=7235773, Creative Commons Attribution/Share-Alike License. Aluminum indium gallium phosphide (AlInGaP) and indium gallium nitride (InGaN) are two of the most commonly used semiconductors for LED technologies. These lights come in many different shapes and sizes, and have a wide variety of uses. : L'alignement axial se fait par rapport au plateau d'une diode électroluminescente. Required fields are marked *. Sitemap Some displays, however, mix the two technologies, using LEDs to backlight the LCD. [4] A white LED has either two or three LEDs inside, of different colors. LEDs are used in many places. | DEFINITION & EXPLANATION, WHAT IS DC GENERATOR | CONSTRUCTION | WORKING PRINCIPLE | TYPES OF DC GENERATOR, STAR DELTA STARTER: WORKING PRINCIPLE | TYPES OF STAR DELTA STARTER | STAR DELTA STARTER THEORY, Your email address will not be published. Hence there will be recombination due to the flow of these charge carriers. 1.Overvoltage or Overcurrent: There is a possibility of loss when the power exceeds a certain limit. What is Light Emitting Diode A light releasing diode is an electric component that emits light when the electric current flows through it. Holes from the p-type region and electrons from the n-type region enter the junction and recombine like a normal diode to enable the current to flow. Une diode électroluminescente (abrégé en LED, de l' anglais  :  light-emitting diode, ou DEL en français) est un dispositif opto-électronique capable d’émettre de la lumière lorsqu’il est parcouru par un … This can damage the LED. They are efficient - most of the energy turns into light, not heat. [1], An LED is a type of diode that makes one color of light when electricity is sent through it in the expected direction (electrically biased in the forward direction). WHAT IS A VARACTOR DIODE | SYMBOL | CONSTRUCTION | WORKING | CHARACTERISTICS | APPLICATIONS OF VARACTOR DIODE, STEP-UP TRANSFORMER | CONSTRUCTION | WORKING & ITS APPLICATIONS, What is a Conservator Tank of Transformer | Construction And Its Working, Electrical Substation Components and Their Workings, What is a Switchgear | Working Of Switchgear | Types and Its Functions. De très nombreux exemples de phrases traduites contenant "light emitting diode" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. Definition: LED is a PN junction diode, that emits light when a certain potential is provided to the diode. A SIMPLE explanation of Light Emitting Diodes (LEDs). LEDs are used in all the circuits of the song. The LED occupies the s… LED is the short form for L ight E mitting D iode and is a forward-biased device. If you exceed this limit, a high current will flows and the LED will be damage. The working principle of LED works on the quantum principle. Unlike ordinary diodes that are made of germanium or silicon, LEDs are made of elements such as gallium, arsenic, and phosphorus. When the diode is in the forward-biased side the electrons are moving rapidly at the hole junction and are continuously joining. The “ Light Emitting Diode ” or LED as it is more commonly called, is basically just a specialised type of diode as they have very similar electrical characteristics to a PN junction diode. An LED is basically a PN Junction Diode, which emits light when forward biased. Pushing the holes in the opposite direction. 5.Economical and reliable: LEDs are cheap in price and have a high degree of reliability. But in most LEDs it is forward biased gives the energy in the front bias, current flows the. [ 4 ] a white LED has either two or three LEDs inside, of colors... Due to the p-n junction biases the diode is a possibility of loss when the diode forward and pushes electrons. 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