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LED | Definition, Light, Facts | Britannica An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current
Light Emitting Diode (LED): What is it How Does it Work? A Light Emitting Diode (LED) is a special type of PN junction diode The light emitting diode is specially doped and made of a special type of semiconductor This diode can emit light when it is in the forward biased state Aluminum indium gallium phosphide (AlInGaP) and indium gallium nitride (InGaN) are two of the most commonly used semiconductors for LED technologies
Light-emitting diode physics - Wikipedia The inner workings of an LED, showing circuit (top) and band diagram (bottom) The p–n junction in any direct band gap material emits light when electric current flows through it, that is, electroluminescence Electrons cross from the n-region and recombine with the holes existing in the p-region Free electrons are in the conduction band of energy levels, while holes are in the valence
Light Emitting Diode (LED): Principle, Advantages, and Uses A light-emitting diode (LED) is a small electronic device that emits light when an electric current flows through it LED works by passing electricity through a semiconductor, which releases energy in the form of light This process makes an LED highly efficient, durable, and versatile, finding its applications in everyday devices such as smartphones, TVs, and home lighting systems
Learn About LED Lighting - ENERGY STAR What are LEDs and how do they work? LED stands for light emitting diode LED lighting products produce light up to 90% more efficiently than incandescent light bulbs How do they work? An electrical current passes through a microchip, which illuminates the tiny light sources we call LEDs and the result is visible light To prevent performance issues, the heat LEDs produce is absorbed into a
How Light Emitting Diodes Work | HowStuffWorks Light emitting diodes form numbers on digital clocks, send data from remote controls and illuminate watches - the simple genius of the design makes it infinitely applicable And now, LEDs are affordable