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Packaging Advances High-Power White LEDs

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Anne L. Fischer

High-power white LEDs are in high demand for automotive use and are a potential replacement for the incandescent lightbulb. But problems with size, heat dissipation and efficiency have taken researchers back to the drawing board to come up with new packaging designs. White LED lamps consisting of a blue-emitting semiconductor LED chip and a yellow-emitting phosphor were examined in two configurations: one in which the phosphor is close to the chip (top) and a more favorable one in which the phosphor is removed from the chip (bottom). Different encapsulant shapes — hemispherical, flat and...Read full article

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    Published: August 2005
    diffuse reflector cupFeaturesincandescent lightbulbindustrialwhite LEDs

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