Open AccessStudy of temperature distributions in pc-WLEDs with different phosphor packages
Author(s) -
Bao Jen Shih,
Shih Chen Chiou,
Yu Hua Hsieh,
Ching Cherng Sun,
Tsan Yang,
Szu Yu Chen,
Te Yuan Chung
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.033861
Subject(s) - phosphor , hotspot (geology) , materials science , optics , coating , light emitting diode , thermal , color temperature , conformal map , optoelectronics , physics , composite material , mathematical analysis , mathematics , geophysics , meteorology
Phosphor converted white LEDs (pc-WLED) with different geometries, namely remote-dome, remote-plate, half-dome, and conformal-coating packages, were studied using simulations to obtain the thermal power and the temperature distribution. The results of an experiment carried out to measure the temperature distribution in these pc-WLEDs validate the simulation results. A hotspot always occurs in the phosphor region. The conformal-coating package is the most feasible choice to reduce the hotspot temperature comparing with the other geometries.