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, thereby …
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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 microchip, which …
LED - Light Emitting Diode: Basics, Types and Characteristics
Sep 20, 2024 · As mentioned in the introduction, an LED is a semiconductor light source. It consists of a PN Junction Diode and when voltage is applied to the LED, electrons and holes recombine in the PN …
Light Emitting Diode: How LEDs Work, How to Use LEDs
Jun 12, 2025 · Learn what a light emitting diode is, how LEDs work, and how to use them in electronics projects. Includes history, applications, tips, and FAQs.
Light Emitting Diode (LED): Principle, Advantages, and Uses
Jun 10, 2025 · 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 …
LED | Definition, Light, & Facts | Britannica
Nov 25, 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 devices …
Light Emitting Diode ＜What are LEDs and How Do They Work?＞
Compared with conventional light sources that first convert electrical energy into heat, and then into light, LEDs (Light Emitting Diodes) convert electrical energy directly into light, delivering efficient light …
Introduction to LEDs - Lighting Design Lab
LEDs are solid state semiconductor devices. LED illumination is achieved when a semiconductor crystal is excited so that it directly produces visible light in a desired wavelength range (color).