Near-/Mid-Field Effect of Color Mixing for Single Phosphor-Converted Light-Emitting Diode Package

Author

Run Hu ; Shan Yu ; Yong Zou ; Huai Zheng ; Fei Wang ; Sheng Liu ; Xiaobing Luo

Author_Institution

Sch. of Energy & Power Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

25

Issue

3

fYear

2013

fDate

Feb.1, 2013

Firstpage

246

Lastpage

249

Abstract

In this letter, it is found through both experiments and Monte Carlo ray-tracing simulations that the working distances would influence the correlated color temperature (CCT) and the angular color uniformity (ACU) of single phosphor-converted light-emitting diode (pc-LED) package. When the working distance decreases, the CCT decreases and the ACU deteriorates. The deterioration caused by short distance is regarded as the near-/mid-field effect of color mixing of pc-LED. This discovery of the near-/mid-field effect may help to find some specific packaging methods to control color mixing and improve white light quality for some applications where the working distance was short.

Keywords

Monte Carlo methods; correlation methods; light emitting diodes; ACU deteriorates; CCT decreases; Monte Carlo ray-tracing simulations; angular color uniformity; color mixing; correlated color temperature; near-/mid-field effect; packaging methods; single phosphor-converted light-emitting diode package; white light quality; Color; Detectors; Light emitting diodes; Monte Carlo methods; Optimized production technology; Phosphors; Ray tracing; Color mixing; light-emitting diode (LED); near-/mid-field effect; phosphor;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2230618

Filename

6375749