Essential Factor for Determining Optical Output of Phosphor-Converted LEDs

Author

Tsung-Hsun Yang ; Cheng-Chien Chen ; Ching-Yi Chen ; Yu-Yu Chang ; Ching-Cherng Sun

Author_Institution

Dept. of Opt. & Photonics, Nat. Central Univ., Chungli, Taiwan

Volume

6

Issue

2

fYear

2014

fDate

Apr-14

Firstpage

1

Lastpage

9

Abstract

An essential factor of the particle number is exploited for the phosphor excitation in phosphor-converted white LEDs. The particle number can clearly reveal the dependence of the light output flux and the correlated color temperature upon the conventional parameters, thickness, and concentration of the phosphors in a simpler way. In addition, we also find that there might exist an optimal particle number for the maximal luminous light output. An empirical function is then proposed for successfully modeling the relation between the output light and the particle number.

Keywords

colour; light emitting diodes; phosphors; correlated color temperature; empirical function; light output flux; optical output; particle number; phosphor excitation; phosphor-converted white LED; Color; Licenses; Light emitting diodes; Optical mixing; Packaging; Phosphors; Resins; Light-emitting diodes; fluorescent and luminescent materials; wavelength conversion devices;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2014.2308630

Filename

6748849