Design method for improving illumination distribution uniformity of LED plant growth light source

Aiming at the problems of poor illumination uniformity and the low effective light energy utilization on the target surface of traditional plant lighting source, it is difficult to meet the requirements of efficient production of high-quality crops in plant factories. In this paper, the layout of LED plant light source was optimized according to the characteristics of RGB LED, and to find a better optimization method of LED light layout. Firstly, we conduct the research based on the characteristics of RGB LED light source. Specifically, the LED array method is simulated and analyzed using an Optical Design Software TracePro (Lambda Research Corporation), and the influence of the LED layout distribution and the distance of the light source on the illuminance was explored. Secondly, the optimal array mode is obtained through Taguchi optimization method and ANOVA theoretical analysis. The results indicate that the optimal layout is that the distance of light source is 85mm, the first term of transverse symmetric arithmetic sequence is 61mm, the first term of longitudinal symmetric arithmetic sequence is 55mm. The illumination uniformity is 83. 987% and the color-mixed uniformity is 84. 54%. This design method provides a new idea for the design of high uniformity area light source.