Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling
碩士 === 崑山科技大學 === 光電工程研究所 === 102 === Light Emitting Diode (LED) is an environmentally friendly energy saving light. In this study, we propose the packaged blue LED with SiO2 added in the encapsulation material mixture. It is found that the blue LED can enhance light efficiency when SiO2 is added. T...
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ndltd-TW-102KSUT01230012016-05-22T04:34:18Z http://ndltd.ncl.edu.tw/handle/69156579977737988781 Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling 封裝膠摻雜二氧化矽防止螢光粉沉澱之發光二極體光電特性研究 Yung-Hsiang, Yeh 葉永祥 碩士 崑山科技大學 光電工程研究所 102 Light Emitting Diode (LED) is an environmentally friendly energy saving light. In this study, we propose the packaged blue LED with SiO2 added in the encapsulation material mixture. It is found that the blue LED can enhance light efficiency when SiO2 is added. The other hand, the packaged white LED with SiO2 added in the phosphor/encapsulation material mixture. It is found that the settling of phosphor particles can be efficiently prevented when SiO2 is added. Part I:There are three kinds of the lead-frames with SiO2 added in the encapsulation material mixture to increase light efficiency. The results show experimental data, light efficiency of three kinds lead-frames increased when SiO2 is added. The concentration of SiO2 is 2wt%. SiO2 is added to increase the light efficiency 2.09%, 5.72%, and 9.37%, respectively. Light output efficiency increased as a result of SiO2 is added to be scattering particles. Part II:Phosphor settling phenomena exists during the encapsulation process of the white light emitting diodes (WLED). Phosphor settling will affect chromaticity coordinates, and correlated color temperature (CCT) for phosphor-converted white LED light source. In this investigation, an experiment confirmed the LED packaging process was conducted to investigate the phosphor settling phenomena from settling 0 hour to 4 hours. The deviations of CIE-x, CIE-y, and CCT by settling are decreased by doping SiO2 micro-particle in the encapsulant. The results show ΔCIE-x, and ΔCIE-y decrease the difference about 0.004. The correlated color temperature difference is lower than 100 K. In addition, we found that doping particles is possible to increase the luminous flux about 11.42 lm, which is 14.48 %. Chun-Liang, Lin Min-Chuan, Lin 林俊良 林明權 2014 學位論文 ; thesis 69 zh-TW |
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碩士 === 崑山科技大學 === 光電工程研究所 === 102 === Light Emitting Diode (LED) is an environmentally friendly energy saving light. In this study, we propose the packaged blue LED with SiO2 added in the encapsulation material mixture. It is found that the blue LED can enhance light efficiency when SiO2 is added. The other hand, the packaged white LED with SiO2 added in the phosphor/encapsulation material mixture. It is found that the settling of phosphor particles can be efficiently prevented when SiO2 is added.
Part I:There are three kinds of the lead-frames with SiO2 added in the encapsulation material mixture to increase light efficiency. The results show experimental data, light efficiency of three kinds lead-frames increased when SiO2 is added. The concentration of SiO2 is 2wt%. SiO2 is added to increase the light efficiency 2.09%, 5.72%, and 9.37%, respectively. Light output efficiency increased as a result of SiO2 is added to be scattering particles.
Part II:Phosphor settling phenomena exists during the encapsulation process of the white light emitting diodes (WLED). Phosphor settling will affect chromaticity coordinates, and correlated color temperature (CCT) for phosphor-converted white LED light source. In this investigation, an experiment confirmed the LED packaging process was conducted to investigate the phosphor settling phenomena from settling 0 hour to 4 hours. The deviations of CIE-x, CIE-y, and CCT by settling are decreased by doping SiO2 micro-particle in the encapsulant. The results show ΔCIE-x, and ΔCIE-y decrease the difference about 0.004. The correlated color temperature difference is lower than 100 K. In addition, we found that doping particles is possible to increase the luminous flux about 11.42 lm, which is 14.48 %.
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author2 |
Chun-Liang, Lin |
author_facet |
Chun-Liang, Lin Yung-Hsiang, Yeh 葉永祥 |
author |
Yung-Hsiang, Yeh 葉永祥 |
spellingShingle |
Yung-Hsiang, Yeh 葉永祥 Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling |
author_sort |
Yung-Hsiang, Yeh |
title |
Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling |
title_short |
Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling |
title_full |
Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling |
title_fullStr |
Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling |
title_full_unstemmed |
Investigation of LED electro-optical characteristics for doping SiO2 in encapsulant to prevent phosphor settling |
title_sort |
investigation of led electro-optical characteristics for doping sio2 in encapsulant to prevent phosphor settling |
publishDate |
2014 |
url |
http://ndltd.ncl.edu.tw/handle/69156579977737988781 |
work_keys_str_mv |
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