19 May '13, 1pm

Understanding LED Application Theory And Practice via @ElectronicDesgn

Understanding LED Application Theory And Practice via @ElectronicDesgn

HB white LEDs work by combining blue-emitting LED diodes with phosphors that emit photons for different colors that when mixed add up to white light. According to Cree, most of the recent advances in HB white LED manufacturing arise from the techniques employed for depositing the phosphor so it will be struck by the maximum number of primary photons and will, in turn, radiate the maximum number of secondary photons in an optimum pattern. In other words, just laying down a “glob” of phosphor on top of the diode junction isn’t a very good approach. (An “optimum pattern” facilitates the use of lenses and reflectors in shaping the light from all the LEDs in the fixture.)

Full article: http://electronicdesign.com/components/understanding-led-...

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