提出在LED多芯片平面封装表面添加微透镜阵列，以提高取光效率。仿真分析了微透镜阵列的半径、间距和排列方式等对取光效率的影响。分析结果表明，通过在封装平面添加微透镜阵列，可以极大地提高取光效率，微透镜的填充因子是影响取光效率大小的关键因素，填充因子越大，则其取光效率越高;微透镜的排列方式对出射光强的分布也会产生影响。

A method was presented in order to enhance the light extraction efficiency of multichips LED array by adding microlens array on the surface of multichips LED array package. The effects of radius, distance and arrangement of microlens on the light extraction efficiency were simulated. The results show that the light extraction efficiency is enhanced greatly, and it is positively correlated with the fill factor of microlens, and the arrangement of microlens impacts on the distribution of extractive light intensity.