Design of the Ring Remote Phosphor Structure for Phosphor-Converted White-Light-Emitting Diodes

被引：34

作者：

Lin, Ming-Te ^{[1
,2
]}

Ying, Shang-Ping ^{[1
,3
]}

Lin, Ming-Yao ^{[1
]}

Tai, Kuang-Yu ^{[1
]}

Tai, Sheng-chieh ^{[1
]}

Liu, Chih-Hsuan ^{[1
]}

Chen, Jyh-Chen ^{[2
]}

Sun, Ching-Cherng ^{[4
]}

机构：

[1] Ind Technol Res Inst, Elect & Optoelect Res Labs, Hsinchu 310, Taiwan

[2] Natl Cent Univ, Dept Mech Engn, Chungli 320, Taiwan

[3] Minghsin Univ Sci & Technol, Dept Optoelect Syst Engn, Hsinchu 30401, Taiwan

[4] Natl Cent Univ, Inst Opt Sci, Chungli 320, Taiwan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 07期

关键词：

EFFICIENCY; REFLECTOR;

D O I：

10.1143/JJAP.49.072101

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A phosphor-converted light-emitting diode structure with an increased phosphor extraction efficiency owing to the ring remote phosphor structure achieves a maximum luminous efficacy of 145 lm/W at 20 mA and a maximum luminous flux of 132 lm at 400 mA. The ring remote phosphor structure consists of an inverted cone lens encapsulant and a surrounding ring remote phosphor layer. Ray-tracing simulations demonstrate that the phosphor extraction efficiency of the ring remote phosphor structure exceeds 93%. A high phosphor extraction efficiency is achieved by decreasing the re-emitting light from the ring remote phosphor layer to the absorptive light-emitting diode (LED) chip. Our results further demonstrate that the ring remote phosphor structure device has a radiation pattern as a bi-wing, which is more appropriate for solid-state lighting owing to the low glare. (C) 2010 The Japan Society of Applied Physics

引用

页码：0721011 / 0721016

页数：6

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