Precise Model of Phosphor Geometry Formed in Dispensing Process of LED Packaging
Phosphor geometry is one of key factors which affect the optical performance for white light emitting diode (LED). In the optical simulation of LED packaging, the phosphor geometry was usually assumed as a sphere cap, but in fact, it is not a sphere cap. Therefore, the simulation results based on such an assumption may not be accurate. In this paper, a precise model of phosphor geometry for a common LED packaging type was built. With consideration of the comprehensive effect of surface tension and gravity, a second-order differential equation is established for describing the axisymmetric phosphor geometry. This equation was solved by the numerical algorithm based on the four-order Runge-Kutta method. Through the solution of this model, the curve of contact angle versus the volume of dispensing phosphor slurry can be achieved.
Huai Zheng Jinlong Ma Xiaobing Luo Sheng Liu
School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074 School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074 MOEMS division, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Te
国际会议
上海
英文
1077-1080
2011-08-08（万方平台首次上网日期，不代表论文的发表时间）