| Summary: | 碩士 === 國立中央大學 === 光電科學與工程學系 === 105 === This study based on method of coating process to produce the secondary optical components to replace tradition production by coating echelon UV glue on the substrate .This method can achieve concentrating effect of nude crystal LED (such as Flip-chip) and improve the light efficiency. In this study, we use the software-TracePro, to simulate and analyze the model, and to optimize the result by Taguchi method in the end of this research, we realize the idea by a prototype. In the Taguchi method we choose four control factor to optimize including coating thickness, width between, layers coating, layers number and UV curing refractive index. According to result of study, compare to the conventional simulation using a perfect surface on the top of nude crystal LED (beam angle 180°) which can concentrate the LED beam angle to 37.16 deg, and in our structure LED beam angle can concentrate the light become 37.68 deg. Our method can reduce the cost ,although the beam angle different perfect surface 0.52 deg .Final product can concentrate the nude crystal LED beam angle from 140 deg to 46.1 deg.
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