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 …
LED | Definition, Light, & Facts | Britannica
Nov 25, 2025 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.
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 …
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 type of …
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, which releases …
Light Emitting Diode Basics | LED Types, Colors and Applications
Sep 16, 2024 · This article is composed as a brief understanding guide to LED, which includes a brief introduction, the electrical symbol of LED, types, construction, characteristics, LED Drivers and many.
What is LED Lighting: Definition, Working Principle and Components
Jun 3, 2025 · Unlike traditional incandescent bulbs or fluorescent lamps, an LED is a semiconductor device that emits light when electrical current passes through it in the forward direction.
What is LED ( Light Emitting Diodes ) | LED Lighting Supply
Dec 3, 2019 · How does an LED work? The P-N junction is the basis of the LED’s functioning. The LED has an anode and a cathode separated by a crystal of semiconductor material. By adding impurities …
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 …
LED display - Wikipedia
An LED display is a flat panel display that uses an array of light-emitting diodes (LEDs) as pixels for a video display. Their brightness allows them to be used outdoors where they are visible in the sun for …