A light-emitting diode is a semiconductor component. Early use as a light, display light-emitting diode board; with the emergence of white LED, also used as lighting.
LED light-emitting diodes, is a solid-state semiconductor devices, it can be directly into the energy of light energy. The heart of the LED is a semiconductor chip, one end of the wafer attached to a bracket, is the negative, the other end connected to the positive power supply, the entire chip is encapsulated by epoxy resin.light-emitting diode Semiconductor chip consists of two parts, part of the P-type semiconductor, in which the dominant hole inside, the other end is the N-type semiconductor, mainly electronic here. But when the two semiconductors are connected, they form a "P-N junction" between them. When the current through the wire acting on the chip, the electron will be pushed to the P area, in the P area with the hole in the electronic composite, and then will be issued in the form of photon energy, which is the principle of LED light. The wavelength of light determines the color of light, is formed by the formation of P-N knot material.
Light-emitting diodes are referred to as LEDs. Is made of a compound containing gallium (Ga), arsenic (As), phosphorus (P),light-emitting diode nitrogen (N), and the like.
When the electrons and holes combined to radiate visible light, which can be used to make light-emitting diodes. In the circuit and the instrument as a light, or composed of text or digital display. Gallium arsenide diode red,light-emitting diode gallium phosphide emitting green, silicon carbide diode yellow, gallium nitride diode blue. Due to the chemical nature of organic light-emitting diode OLED and inorganic light-emitting diode LED.