LED Overview:
LED (Light Emitting Diode), light emitting diode, a semiconductor device is a solid, it can be converted directly into electricity to light. LED’s heart is one end of a semiconductor wafer, the wafer is attached to a bracket, one end of the negative electrode, and the other end connected to a positive power source, so that the whole wafer is encapsulated epoxy. The semiconductor wafer is composed of two parts, a portion of P-type semiconductor, hole in it dominates, the other end of the N-type semiconductor, here is mainly electrons. But when the two semiconductor connected, to form a “P-N junction” between them. When the current through the wire when on the chip, electronics will be pushed P region, electron hole recombination, and then will be issued in the form of photon energy in the region P, which is the principle of LED light. The wavelength of light that is the color of light, is determined by the material forming the P-N junction.
LED advantages:
determines the intrinsic characteristics of the LED it is the ideal light source to replace conventional light sources, it has a wide range of uses.
Small size: LED is basically a small chip is encapsulated in epoxy, so it is very small and very light.
Low power consumption: LED power consumption is very low, in general, the LED operating voltage is 2-3.6V. Current work is 0.02-0.03A. That is to say: it consumes no more than 0.1W.
Long life: at the proper current and voltage, LED life of up to 100,000 hours.
high brightness, low calorie
Environmental: LED is made from non-toxic materials, unlike fluorescent lamps containing mercury can cause pollution, while LED can also be recycled.
Robust: LED is completely encapsulated in epoxy, which are stronger than light bulbs and fluorescent tubes. Light body and no loose parts, these features make the LED can be said to be easily damaged.