light-emitting junction

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• Light-emitting Electrochemical Cell — A light emitting electrochemical cell (LEC or LEEC) is a solid state devices that generates light from an electric current (electroluminesces). They are usually composed of two metal electrodes connected by (e.g. sandwiching) an organic… …   Wikipedia

• Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …   Wikipedia

• light-emitting diode — /luyt i mit ing/. See LED. [1965 70] * * * ▪ electronics       in electronics, a semiconductor device that emits infrared or visible light when charged with an electric current. Visible LEDs are used in many electronic devices as indicator lamps …   Universalium

• light-emitting diode — noun diode such that light emitted at a p n junction is proportional to the bias current; color depends on the material used • Syn: ↑LED • Hypernyms: ↑diode, ↑semiconductor diode, ↑junction rectifier, ↑crystal rectifier • Hyponyms …   Useful english dictionary

• junction rectifier — noun a semiconductor that consists of a p n junction • Syn: ↑diode, ↑semiconductor diode, ↑crystal rectifier • Hypernyms: ↑semiconductor device, ↑semiconductor unit, ↑semiconductor …   Useful english dictionary

• Traffic light — The traffic light, also known as traffic signal, stop light, traffic lamp, stop and go lights, robot or semaphore, is a signaling device positioned at a road intersection, pedestrian crossing, or other location. Its purpose is to indicate, using… …   Wikipedia

• Vertical-cavity surface-emitting laser — The vertical cavity surface emitting laser (VCSEL; [v ɪxl] ) is a type of semiconductor laser diode with laser beam emission perpendicular from the top surface, contrary to conventional edge emitting semiconductor lasers (also in plane lasers)… …   Wikipedia

• Laser diode — Top: a packaged laser diode shown with a penny for scale. Bottom: the laser diode chip is removed from the above package and placed on the eye of a needle for scale …   Wikipedia

• Diode — Figure 1: Closeup of a diode, showing the square shaped semiconductor crystal (black object on left) …   Wikipedia

• laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; …   Universalium

• radiation measurement — ▪ technology Introduction       technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement.       The term ionizing radiation refers to those… …   Universalium