Description of LED lighting, color, lighting principles

time2011/11/08

  LED, light emitting diode is a solid-state semiconductor devices, it can directly into electricity to light. The heart of the LED is a semiconductor chip, the chip attached to a bracket on one end, one end is negative, the other end to connect the positive power supply, so that the whole chip is epoxy encapsulated. Semiconductor chip consists of two parts, part of P-type semiconductor, the hole in it dominates the other end is N-type semiconductor, mainly in the electronics side. But neither of the time semiconductor connected between them to form a "PN junction." When the current through the wire act on the chip, electronics will be pushed to the P zone, with the P zone electron hole recombination, and then will be issued in the form of photon energy, which is the principle of LED light. The wavelength of light determine the color is determined by the material forming the PN junction.
  LED lighting color
  LED (LightingEmittingDiode) lighting that is LED lighting, is a solid light-emitting semiconductor devices. It is the use of solid semiconductor chip as luminescent materials in the semiconductor compound occurs through the carrier release excess energy caused by photon emission, the direct issue of red, yellow, blue, green, blue, orange, purple, white light. LED lighting products is the use of LED as a light source created by the lighting apparatus.
  LED lighting works
  LED is Ⅲ - Ⅳ compounds, such as GaAs (gallium arsenide), GaP (Gallium Phosphide), GaAsP (gallium arsenide phosphate) and other semiconductor processing, and its core is the PN junction. Therefore, it is generally IN characteristics of PN junction that is forward, reverse end, breakdown characteristics. In addition, under certain conditions, it also has light-emitting properties. In the forward voltage, electron injection from the P N zone area, the hole injection from the P Zone N area. Into other areas of minority carriers (minority carriers) part of the carrier with the majority (more children) composite and light.