LED is a solid light source, when it is coupled with a positive voltage across the semiconductor in the minority carrier and majority carrier complex occurs, release the excess energy will cause the photon emission.
Using different materials, different colors can be made of light-emitting diodes. As a new light source, in recent years,glue stick major companies and research institutions in the ascendant on the LED so that light efficiency can be greatly improved, Lumiled company has research and development and production of optical efficiency to achieve 90Lm / W white LED, has reached the incandescent level.
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