The LED (luminous diot)Emitting diode (LED) is an optical components-power on the basis of semiconductor crystals. To convert electric energy into luminous energy, load grain gets pumped into an electrode of the LED, then reunited back and glowing. The emission wavelength is primarily dependent on semiconductor materials, and can be adjusted exactly when designing components.Due to the characteristic spontaneous emission LED's should generally be used for lighting large areas, such as lights, traffic signals and public lighting systems.Compared with the conventional screen used by light bulbs, then used by the LED has advantages such as low power marketing target, more powerful brightness, longer lifespan and smaller voltage (so it is more secure). There are a lot of outdoor display screen with diagonal greater than 100 inches was created by millions of LEDs.
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