標題: Planar Lighting System Using Array of Blue LEDs to Excite Yellow Remote Phosphor Film
作者: Huang, Hsin-Tao
Huang, Yi-Pai
Tsai, Chuang-Chuang
光電工程學系
顯示科技研究所
Department of Photonics
Institute of Display
關鍵字: Angular color deviation;indium gallium nitride (InGaN);light-emitting diodes (LEDs);phosphor;remote phosphor;yttrium aluminum garnet (YAG)
公開日期: 1-Jan-2011
摘要: This investigation demonstrates a novel light-emitting system with an array of blue light-emitting diodes (LEDs). Unlike a conventional lighting system that is constructed from white LEDs, the proposed planar lighting system uses blue LEDs to excite a YAG : Ce(3+) yellow phosphor film remotely, yielding a high lumen efficiency with uniform and planar light-emission. The phosphor film herein acts as a wavelength converter and a light diffuser simultaneously. The optical properties of the proposed lighting system, angular color deviation and light-emitting uniformity, are studied. Eventually, a high lumen efficiency (73.0 lm/W) and thin lighting module (7.5 mm-thick) was demonstrated without the use of any conventional diffuser plate or light guiding plate (LGP). A low color deviation (Delta u'v' = 0.025) and a high light-emitting uniformity (U(niformity) = 82%) were achieved. Hence, the proposed lighting system exhibited superior optical performance using a compact module.
URI: http://dx.doi.org/10.1109/JDT.2010.2090339
http://hdl.handle.net/11536/26105
ISSN: 1551-319X
DOI: 10.1109/JDT.2010.2090339
期刊: JOURNAL OF DISPLAY TECHNOLOGY
Volume: 7
Issue: 1
起始頁: 44
結束頁: 51
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