Author(s): CHE Zhen, ZHANG Jun, YU Xin-yu, CHEN Zhe
Pages: 1220-1226
Year: 2015 Issue:  10
Journal: Chinese Journal of Luminescence
Keyword:  optical simulation; phosphors; particle number concentration; luminous efficiency;
Abstract: The optimal design of the particle number concentration of phosphor is an important way to improve the color quality and lumen efficiency of white LED. Through the method of optical simu-lation, the optical properties were analyzed under the influence of different particle number concen-trations. According to the simulation results, with the increasing of the particle number concentration of phosphor, the absorption and scattering of blue light are strengthened. It is helpful to get the higher luminous efficiency, the better white light spot and uniform chrominance. When the particle number concentration of phosphor is at level of 105/mm3 , the LED light spot has the most uniform light intensity distribution and chrominance, and approximates the standard white light source.