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Imbens, Rik (author), Klootwijk, Lucas (author)This thesis describes the design and implementation of a LED Driving and Sensing Unit, one of the parts of a UV-C LED sterilization machine for the disinfection of plant seeds. The purpose of this part is to drive LEDs which can destroy different structures of pathogens. While doing this, certain parameters like temperature and ozone generation...bachelor thesis 2023
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De Jonghe, Charlotte (author), Lagerweij, Gijs (author)The effectiveness of ultraviolet (UV) irradiation for disinfection has been well-known for more than a century. Recent advances in lightÂ-emitting diode (LED) technology have brought UV LEDs to the consumer market. These offer many advantages over traditional gasÂ-discharge lamps, allowing UV radiation to be generated with higher reliability in...bachelor thesis 2021
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Sun, Bo (author), Fan, Xuejun (author), van Driel, W.D. (author), Cui, Chengqiang (author), Zhang, Kouchi (author)In this study, we present a general methodology that combines the reliability theory with physics of failure for reliability prediction of an LED driver. More specifically, an integrated LED lamp, which includes an LED light source with statistical distribution of luminous flux, and a driver with a few critical components, is considered. The...journal article 2018
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Sun, B (author), Fan, Xuejun (author), Zhang, Kouchi (author)This chapter investigates the reliability of the integrated LED lamps with electrolytic capacitor-less LED drivers. Firstly, the impact of the interaction between the degradations of the LED light source and the driver on the lumen depreciation is studied. The electronic-thermal simulation was carried out to obtain the history of temperatures of...book chapter 2018
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Kong, Fanyu (author)LED lamps becomemore and more economically attractive in the lighting market, primarily thanks to their great energy saving, long lifetime and ever decreasing cost compared with the conventional lighting solutions, such as incandescent or fluorescent ones. A traditional fluorescent lighting system consists of a fluorescent lamp(s) and a magnetic...master thesis 2017
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Sun, B. (author), Fan, Xuejun (author), Ye, H. (author), Fan, Jiajie (author), Qian, Cheng (author), van Driel, W.D. (author), Zhang, Kouchi (author)In this paper, an integrated LED lamp with an electrolytic capacitor-free driver is considered to study the coupling effects of both LED and driver's degradations on lamp's lifetime. An electrolytic capacitor-less buck-boost driver is used. The physics of failure (PoF) based electronic thermal simulation is carried out to simulate the lamp's...journal article 2017
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Guo, J. (author)Solid-state LED lighting, as the fourth-generation lighting technology, has drawn great popularity due to its long lifetime, high luminous efficacy, high energy efficiency and sustainability. Technical advancement and rapid cost-down in LED technology bring entirely new possibilities in lighting applications and stimulate a significant...master thesis 2015
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Ma, Y. (author)In recent years, the LED lighting developed rapidly because of its superior efficiency, eco-friendliness, and longer lifetime compared to the fluorescent and its incandescent counterparts. As the core of LED systems, LED drivers need to be well designed in order to properly drive the LEDs with high efficiency, high reliability, long lifetime,...master thesis 2015