Reduction of phosphor particle segregation effects on the CIE & spatial CIE distribution of LED packages

fYear

2013

fDate

11-14 Aug. 2013

Firstpage

1202

Lastpage

1206

Abstract

For lighting applications, it is common to dispense multi-phosphor materials mixing with silicone on blue LED chips to obtain high color rendering index and superior white light quality. One of the technical challenges related to dispensing phosphor materials in LED packages is the settling of the phosphor particles with time due to density & size difference. The phosphor distribution directly affects the radiation pattern (viewing angle) and also the CIE distribution of LED packages. In current study, experiments have been conducted using lead frame 3528 packages to investigate the settling effect of phosphor particles on the spatial distribution of CIEx for i) a single phosphor package (as a control); ii) a dual phosphor package.

Keywords

light emitting diodes; phosphors; silicones; LED packages; blue LED chips; dual phosphor package; high color rendering index; lead frame packages; lighting applications; multiphosphor materials; phosphor particle segregation effect reduction; phosphor particles; radiation pattern; silicone; single phosphor package; spatial CIE distribution; superior white light quality; Color; Curing; Distribution functions; Electronics packaging; Graphical models; Light emitting diodes; Phosphors; phosphor; settling; spatial CIE distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Packaging Technology (ICEPT), 2013 14th International Conference on

Conference_Location

Dalian

Type

conf

DOI

10.1109/ICEPT.2013.6756674

Filename

6756674