Light-emitting diode - Wikipedia
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, releasing energy in the form of photons.
What is LED? - Definition, Working, Properties, Uses, Advantages
A light-emitting diode (LED) is a semiconductor device that emits light when an electric current flows through it. Based on the semiconductor material used and the amount of doping, an LED will emit a coloured light at a particular spectral wavelength when forward biased.
Light-emitting diode physics - Wikipedia
Light-emitting diodes (LEDs) produce light (or infrared radiation) by the recombination of electrons and electron holes in a semiconductor, a process called "electroluminescence". The wavelength of the light produced depends on the energy band gap of the semiconductors used.
Light Emitting Diode or the LED Tutorial - Basic Electronics Tutorials ...
Different LED compounds emit light in specific regions of the visible light spectrum and therefore produce different intensity levels. The exact choice of the semiconductor material used will determine the overall wavelength of the photon light emissions and therefore the resulting colour of the light emitted. Light Emitting Diode Colours
Light Emitting Diode (LED): What is it & How Does it Work?
2012年2月24日 · LED Definition: A Light Emitting Diode (LED) is a semiconductor device that emits light when electric current flows through it. Working Principle of LED: The working principle of LED involves applying a forward bias current, which causes electrons and holes to recombine at the junction, producing light.
Light Emitting Diode (LED) - Working, Construction and Symbol
A light Emitting Diode (LED) is an optical semiconductor device that emits light when voltage is applied. In other words, LED is an optical semiconductor device that converts electrical energy into light energy.
LED – Light Emitting Diode - Electronics Hub
2024年9月20日 · An LED or a Light Emitting Diode is semiconductor device that emits light due to Electroluminescence effect. An LED is basically a PN Junction Diode, which emits light when forward biased. Light Emitting Diodes are almost everywhere.
LED | Definition, Light, & Facts | Britannica
2024年11月16日 · 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 starting in 1968, when Hewlett-Packard (HP) introduced the first LED display.
Light-Emitting Diodes: A Primer - Photonics
Light-emitting diodes (LEDs) are semiconductors that convert electrical energy into light energy. The color of the emitted light depends on the semiconductor material and composition, with LEDs generally classified into three wavelengths: ultraviolet, visible, and infrared.
Light-Emitting Diode - an overview | ScienceDirect Topics
2013年9月3日 · The LED is a semiconductor diode that is constructed in a manner and of a material so that light is emitted when an electric current is passed through it. The semiconductor material most often used for an LED that emits red light is gallium arsenide phosphide (GaAsP).