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Related to Light Emitting Diode |
Sapphire is a crystal boules of aluminum oxide (Al2O3) formed at the 2050¡É. Because of the remarkable hardness of sapphires, 9 Mohs scale (and of aluminum oxide in general), sapphire has infrared optical characteristics, superior heat conductivity, stability between low and high temperature similar metal in ceramic material. |
LED is semiconductor device has contains various ability to flow electricity due to impurity of internal structure of all semiconductor (created by additives of trace chemical). N type impurity is added excess electron to the semiconductor, P type impurity is generate ¡®electric attack¡¯. Particle contains negative electricity is naturally move from many electron group (negative) to low electron group (positive). N type materials stationed along the P type material in the internal of Diode , electric flow from N type to P type in one direction when these two are stayed in electrode. Electron send energy in the form of light quantum when In the moment of fall in electric attack, as a result of this, emit light when the diode move one way to another way. Generate various light wave length depends on the using materials to the semiconductor. |