n-UV+Blue/Green/Red White Light Emitting Diode Lamps
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- Kuo Cheng-Huang
- Institute of Microelectronics, Department of Electrical Engineering
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- Sheu Jinn-Kong
- Optical Science Center, National Central University
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- Chang Shoou-Jinn
- Institute of Microelectronics, Department of Electrical Engineering
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- Su Yan-Kuin
- Institute of Microelectronics, Department of Electrical Engineering
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- Wu Liang-Wen
- Institute of Microelectronics, Department of Electrical Engineering
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- Tsai Ji-Ming
- South Epitaxy Corporation
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- Liu C. H.
- Department of Electronic Engineering Nan-Jeon Junior College of Technology and Commerce
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- Wu R. K.
- Nantex Industry Corporation
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Abstract
Phosphor-conversion light-emitting diode (LED) lamps were fabricated by precoating blue/green/red phosphors onto near-ultraviolet (n-UV) LED chips prior to packaging them into LED lamps. With a 20 mA injection current, it was found that the color temperature, Tc, was approximately 5900 K, the color rendering index, Ra, was approximately 75, and the CIE color coordinates were x=0.33 and y=0.35 for the “n-UV+blue/green/red” white LED lamps. No obvious changes in color temperature, Tc, or color-rendering index, Ra, could be observed when we increased the injection from 20 mA to 60 mA. These results indicate that such “n-UV+blue/green/red” white LED lamps are much more optically stable than the conventional “blue+yellow” LED lamps.
Journal
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 42 (4B), 2284-2287, 2003
The Japan Society of Applied Physics
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Details 詳細情報について
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- CRID
- 1390282681231536128
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- NII Article ID
- 130004530759
- 10010801703
- 210000053292
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- NII Book ID
- AA10457675
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- ISSN
- 13474065
- 00214922
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- NDL BIB ID
- 6523798
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed