Abstract
This study proposed a correlated color temperature (CCT) tunable phosphor-converted white light emitting diode (LED) with an omni-directional reflector (ODR). Applying current to each individual InGaN based ultraviolet, purple and blue source LED chip of the white LED package, we can achieve the CCT tunability. The optimum color properties of the resulting white light are (0.3347, 0.3384), 5398 K, 81, 3137~8746 K for color coordinates, CCT, color rendering index (CRI) and CCT tuning range, respectively. Roughening the ODR substrate, we solve the non-uniformity color distribution caused by the reflectance of the ODR and positioning of source LED chips.
©2009 Optical Society of America
Full Article | PDF ArticleOSA Recommended Articles
Ping Zhong, Guoxing He, and Minhao Zhang
Opt. Express 20(S5) A684-A693 (2012)
Ji Hye Oh, Su Ji Yang, Yeon-Goog Sung, and Y. R. Do
Opt. Express 20(18) 20276-20285 (2012)
Peifen Zhu, Hongyang Zhu, Gopi C. Adhikari, and Saroj Thapa
OSA Continuum 2(8) 2413-2427 (2019)