Abstract:Improving the light extraction efficiency of LED with various types of lens is the research focus of LED package. Taking sub-millimeter size 5630 TOP LED with lens as the model, the effects of cone arrays, half-ellipsoid arrays and hemisphere arrays with different sizes on the light extraction efficiency were investigated and stimulated by applying stimulation software TracePro. The stimulation results show that under optimal conditions, the light extraction efficiency of 5630 TOP LED can be increased by 10.7% and the light distribution is uniform.