Title :
Comprehensive Study on the Transmitted and Reflected Light Through the Phosphor Layer in Light-Emitting Diode Packages
Author :
Run Hu ; Huai Zheng ; Jinyan Hu ; Xiaobing Luo
Author_Institution :
Sch. of Energy & Power Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
In this study, we modeled the transmitted and reflected light of a phosphor layer in light-emitting diode packages by coupling the revised Kubelka-Munk and Mie-Lorenz theories. Through analyzing the transmitted and reflected light separately, it is found that the transmitted and reflected blue light vary monotonically with the changes of phosphor particle size, concentration and thickness. While the trends of the transmitted and reflected yellow light are non-monotonic, which are influenced by the interactions among the phosphor particle size, concentration and thickness. The light extraction efficiency through a phosphor layer was discussed. The reasons behind these phenomena were also presented.
Keywords :
light emitting diodes; light reflection; light transmission; particle size; phosphors; Mie-Lorenz theory; light extraction efficiency; light reflection; light transmission; light-emitting diode; phosphor layers; phosphor particle size; revised Kubelka-Munk theory; Absorption; Backscatter; Light emitting diodes; Light scattering; Market research; Phosphors; Light-emitting diodes (LEDs); phosphors; reflection; transmission;
Journal_Title :
Display Technology, Journal of
DOI :
10.1109/JDT.2012.2225021