Title :
Study on the Optical Properties of Conformal Coating Light-Emitting Diode by Monte Carlo Simulation
Author :
Hu, Run ; Luo, Xiaobing ; Liu, Sheng
Author_Institution :
Sch. of Energy & Power Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
The light extraction efficiency (LEE), correlated color temperature (CCT), and angular color uniformity (ACU) of the conformal coating phosphor silicone gel were investigated by Monte Carlo ray-tracing simulations. Relative to the conventional dispensing method, the conformal coating method can make the light-emitting diode (LED) module obtain better optical properties. It was found that the thickness of the phosphor layer in conformal coating was a key factor determining the optical performance. The thickness could be optimized for good optical properties. The optimal thickness is around 50-70 μm when taking LEE, CCT, and ACU into consideration.
Keywords :
Monte Carlo methods; gels; light emitting diodes; optical films; phosphors; ray tracing; silicones; Monte Carlo ray tracing simulation; Monte Carlo simulation; angular color uniformity; conformal coating light emitting diode; conformal coating phosphor silicone gel; correlated color temperature; light extraction efficiency; optical properties; optimal thickness; size 50 mum to 70 mum; Coatings; Color; Light emitting diodes; Monte Carlo methods; Optimized production technology; Packaging; Phosphors; Angular color uniformity (ACU); Monte Carlo simulation; correlated color temperature (CCT); light-emitting diodes (LEDs); phosphor-conversion;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2166381
