摘要
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.
原文 | ???core.languages.en_GB??? |
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頁(從 - 到) | 574-576 |
頁數 | 3 |
期刊 | IEEE Photonics Technology Letters |
卷 | 22 |
發行號 | 8 |
DOIs | |
出版狀態 | 已出版 - 15 4月 2010 |