Light-emitting diode - Wikipedia
In electrical engineering, a light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, …
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LEDs: What Are They? (Definition, Types, and Uses)
Mar 12, 2021 · We will start by taking a look at what LEDs actually are, the different types of LEDs, and the uses of LEDs. Finally, we will answer some of the most frequently asked …
How Light Emitting Diodes (LEDs) Work - HowStuffWorks
Light emitting diodes, commonly called LEDs, are real unsung heroes in the electronics world. They do many different jobs in all kinds of devices. They form numbers on digital clocks, …
Learn About LED Lighting - ENERGY STAR
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 …
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LED | Definition, Light, & Facts | Britannica
Nov 21, 2025 · LED, in electronics, a semiconductor device that emits infrared or visible light when charged with an electric current. LED displays began to be used for consumer electronic …