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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50144

    Title: Ring Remote Phosphor Structure for Phosphor-Converted White LEDs
    Authors: Lin,MT;Ying,SP;Lin,MY;Tai,KY;Tai,SC;Liu,CH;Chen,JC;Sun,CC
    Contributors: 機械工程學系
    Date: 2010
    Issue Date: 2012-03-27 17:04:28 (UTC+8)
    Publisher: 國立中央大學
    Abstract: An efficient packaging configuration for high-power white light-emitting diodes (LEDs), consisting of an inverted cone lens encapsulant and a surrounding ring remote phosphor layer, is present. Ray-tracing simulations demonstrate that the package extraction efficiency of the ring remote phosphor structure exceeds 93%. With the implementation of the ring remote phosphor structure, the ring remote phosphor device has a maximum luminous efficacy of 145 lm/W at 20 mA and a maximum luminous flux of 132 lm at 400 mA. The enhancements are attributed to reduced absorption of the re-emitting yellow light by the LED chip, and the reduction of the trapping light inside the flat remote phosphor layer in normal remote phosphor structure.
    Appears in Collections:[機械工程學系] 期刊論文

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