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  2. wikipedia.org
    https://en.wikipedia.org › wiki › Light-emitting_diode

    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, …

  3. energystar.gov
    https://www.energystar.gov › products › learn-about-led-lighting

    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 …

  4. britannica.com
    https://www.britannica.com › technology › LED

    LED | Definition, Light, & Facts | Britannica

    Jan 2, 2026 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.

  5. electrical4u.com
    https://www.electrical4u.com › led-or-light-emitting-diode

    Light Emitting Diode (LED): What is it & How Does it Work?

    Feb 24, 2012 · What is a Light Emitting Diode (LED)? 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 …

  6. electronicshub.org
    https://www.electronicshub.org › led-light-emitting-diode

    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 …

  7. howstuffworks.com
    https://electronics.howstuffworks.com › led.htm

    How Light Emitting Diodes 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, …

  8. sciencefacts.net
    https://www.sciencefacts.net › light-emitting-diode.html

    Light Emitting Diode (LED): Principle, Advantages, and Uses

    Jun 10, 2025 · 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, …

  9. vipled.com
    https://www.vipled.com › what-is-led-and-how-does-it-work

    What Is LED and How Does It Work? - vipled.com

    Jul 27, 2025 · What Does LED Stand For? LED stands for Light Emitting Diode. It is a semiconductor device that emits light when electricity flows through it. Unlike traditional bulbs …

  10. soldered.com
    https://soldered.com › learn › led-light-emitting-diode-explained

    LED (Light-emitting diode) explained - Soldered Electronics

    The first question that might pop into your mind is, what is exactly an LED? A regular diode is a semiconductor device that works as a one-way switch for electrical current. It allows current in …

  11. rohm.com
    https://techweb.rohm.com › product › opto-electronics › led

    Light Emitting Diode ＜What are LEDs and How Do They Work?＞

    LEDs are a type of semiconductor called “Light Emitting Diode”. White LEDs, which have achieved practical realization through the use of high-brightness blue LEDs developed in 1993 …

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