Development of Aluminum Nitride Coatings to Optimal Multiple Characteristics of Thermal Performance for High Power LED Packages by Eletrostatic Spraying

• Main Authors: Kuang Hui Kao, 高光慧
• Other Authors: Hung Shyong Chen
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/30717267080161736747

碩士 === 正修科技大學 === 機電工程研究所 === 103 === The project reports to optimize the multiple characteristics of the aluminum nitride (AlN) ceramics coated heat sink based on Fuzzy based Taguchi design that is used to enhance the thermal performance of light-emitting diode (LED) packages. AlN coatings are grown on substrates as heat sink by electrostatic sprayed process. The 18 orthogonal arrays of the LEDs with a signal-to-noise (S/N) ratio are adopted and the impact of the effect of the spraying parameters with an analysis of variance (ANOVA) on the AlN coatings is examined. The junction temperatures of AlN coated heat sink are explored using an infrared camera. In addition, the optical characteristics of the LED, such as its lumens and luminous efficiency using an integrating sphere are evaluated. In this study, cooling effect on the junction temperature of LED substrate, and enhancing optical characteristics of the LED are obtained through the optimal design. The experimental results show that using AlN ceramics on Al substrate that can effectively enhance the heat dissipation and luminous efficiency, provides a high heat transfer capability and an effective thermal management. In this study, the thermal properties of LED modules for AlN coated Al substrate on LEDs are successful optimized.