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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sijia Dang Ziquan Guo Weilin Huang Yulin Gao Yijun Lu Yue Lin Tienmo Shih Lihong Zhu Hongli Lu Zhong Chen |
| Copyright Year | 2009 |
| Abstract | In this paper, we have proposed a transmission-type testing system for determining optical characteristics of remote-phosphor plates in white light-emitting diodes (WLEDs). A comparative analysis between the proposed system and a traditional reflection-type system has also been conducted. Results show that the measured optical efficiency of phosphors appears lower for the former than for the latter. Reasons lie in that, for the latter, during measurements, more blue leakage light enters the detector of the system, and more blue light is reabsorbed by phosphor plates and converted to yellow light. Both factors may lead to a slight increase in the light conversion efficiency of phosphors for the reflection-type system. However, in a real structure of WLEDs, the exciting light is mostly transmitting through the phosphor layer rather than being reflected. Finally, we propose that the transmission-type system is more suitable for determining optical properties for remote-phosphor WLEDs. |
| Starting Page | 1 |
| Ending Page | 9 |
| Page Count | 9 |
| File Size | 1255120 |
| File Format | |
| ISSN | 19430655 |
| Volume Number | 8 |
| Issue Number | 1 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2016-01-01 |
| Publisher Place | U.S.A. |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Phosphors Light emitting diodes Velocity control Optical reflection Optical device fabrication Testing Optical variables measurement optical characteristic White light-emitting diode remote phosphor White light-emitting diode (WLED) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering |
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