Design of a cylindrical LED substrate without radiator  

作　　者：Fan Tang Zhenning Guo 

机构地区：[1]Huaqiao University,College of Information Science and Engineering,Key Laboratory of Light Propagation and Transformation of Fujian Province,Xiamen 361021,China

出　　处：《Journal of Semiconductors》2017年第12期62-67,共6页半导体学报（英文版）

摘　　要：To reduce the weight and production costs of light-emitting diode （LED） lamps, we applied the principle of the chimney effect to design a cylindrical LED substrate without a radiator. We built a 3D model by using Solidworks software and applied the flow simulation plug-in to conduct model simulation, thereby optimizing the heat source distribution and substrate thickness. The results indicate that the design achieved optimal cooling with a substrate with an upper extension length of 35 mm, a lower extension length of 8 mm, and a thickness of 1 mm. For a substrate of those dimensions, the highest LED chip temperature was 64.78 ~C, the weight of the sub- strate was 35.09 g, and Rib = 7.00 K/W. If the substrate is powered at 8, 10, and 12 W, its temperature meets LED safety requirements. In physical tests, the highest temperature for a physical 8 W cylindrical LED substrate was 66 ℃, which differed by only 1.22 ℃ from the simulation results, verifying the validity of the simulation. The designed cylindrical LED substrate can be used in high-power LED lamps that do not require radiators. This design is not only excellent for heat dissipation, but also for its low weight, low cost, and simplicity of manufacture.To reduce the weight and production costs of light-emitting diode （LED） lamps, we applied the principle of the chimney effect to design a cylindrical LED substrate without a radiator. We built a 3D model by using Solidworks software and applied the flow simulation plug-in to conduct model simulation, thereby optimizing the heat source distribution and substrate thickness. The results indicate that the design achieved optimal cooling with a substrate with an upper extension length of 35 mm, a lower extension length of 8 mm, and a thickness of 1 mm. For a substrate of those dimensions, the highest LED chip temperature was 64.78 ~C, the weight of the sub- strate was 35.09 g, and Rib = 7.00 K/W. If the substrate is powered at 8, 10, and 12 W, its temperature meets LED safety requirements. In physical tests, the highest temperature for a physical 8 W cylindrical LED substrate was 66 ℃, which differed by only 1.22 ℃ from the simulation results, verifying the validity of the simulation. The designed cylindrical LED substrate can be used in high-power LED lamps that do not require radiators. This design is not only excellent for heat dissipation, but also for its low weight, low cost, and simplicity of manufacture.

关 键 词：cylindrical substrate highest temperature LED without radiator chimney effect 

分 类 号：TN312.8[电子电信—物理电子学]