Effective method for improving illuminating properties of white-light LEDs

Hong Yu Chou, Tzu Hsun Hsu, Tsung Hsun Yang

研究成果: 雜誌貢獻會議論文同行評審

9 引文 斯高帕斯(Scopus)


Recently, the applications of light emitting diodes (LED) in illumination are up roaring, and the solutions with nigh color rendition under various color temperature are in urgent need. Therefore, an effective method for improving lighting properties is very critical and necessary. To study new material of phosphor to combine with the LED chip or new LED structure to emit different spectrum could improve them. In addition, to combine with different kind of LEDs could achieve the same purpose and even with much lower cost. In this work, it has developed such an optimization method for a common white LED combined with a color LED. This method allows for finding the optimal mixing ratio of luminance of both LEDs in order to obtain the best CRI for illumination. By combining with a specific color LED, a white LED whose color temperature is approximately 6500K and CRI is 70, can be improved its color rendering index better than 80 and its correlated color temperature down to near 3000K simultaneously. Moreover, it could produce one which is more close to the warm-white lighting, and it is possible to substitute for the incandescent lamp. Thus, the mixing light is more suitable for illumination in housing applications. In the same way, with more LEDs in combination, CRI could be enhanced much better.

頁(從 - 到)33-41
期刊Progress in Biomedical Optics and Imaging - Proceedings of SPIE
出版狀態已出版 - 2005
事件Light-Emitting Diodes: Research, Manufacturing, and Applications IX - San Jose, CA, United States
持續時間: 25 1月 200527 1月 2005


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