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Xin Li, Yue Wu, Jialei Yuan, Shuyu Ni, Chuan Qin, Yan Jiang, Jie Li and Yongjin Wang
Optical light communications.
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Won Hee Kim, Young Jae Jang, Ja-Yeon Kim, Myungsoo Han, MinJae Kang, Kiyong Yang, Jae-Hyun Ryou and Min-Ki Kwon
Color-converted micro-LED displays consisting of mono-blue-colored micro LED arrays and color-conversion materials have been used to achieve full color while reliving the transfer and epitaxial growth of three different-colored micro LEDs. An efficient t...
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Monette H. Khadr, Ahmed Abd El Aziz, Heba A. Fayed and Moustafa Aly
This paper aims to extend the limited bandwidth of phosphorescent white LEDs for a multiple-input single-output (MISO) visible light communication (VLC) system. A proposed LED arrangement model is presented, resulting in improved results as compared to t...
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Yong-Nong Chang, Shun-Yu Chan and Hung-Liang Cheng
This paper proposes a single-stage, high power-factor light-emitting diode (LED) driver with a self-excited control scheme for the power switches. The self-excited mechanism is accomplished by fetching the driving voltages from a center-tapped transforme...
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Byung-Lip Ahn, Ji-Woo Park, Seunghwan Yoo, Jonghun Kim, Hakgeun Jeong, Seung-Bok Leigh and Cheol-Yong Jang
We investigated the synergetic effect between light-emitting diode (LED) lighting efficiency and building energy savings in heating and cooling using an alternative thermal operating system (ATOS) of indoor LED lighting integrated with the ventilation sy...
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Kyung-Ryang Lee, Sung-Dae Yeo, Seung-Il Cho and Seong-Kweon Kim
Conventional fluorescent light sources, as well as incandescent light sources are gradually being replaced by Light Emitting Diodes (LEDs) for reducing power consumption in the image display area for multimedia application. An LED light source requires a...
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Flaminia Chellini, Alessia Tani, Sandra Zecchi-Orlandini, Marco Giannelli and Chiara Sassoli
Although photobiomodulation (PBM) has proven promising to treat wounds, the lack of univocal guidelines and of a thorough understanding of light?tissue interactions hampers its mainstream adoption for wound healing promotion. This study compared murine a...
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Mahdi Soltani, Moritz Freyburger, Romit Kulkarni, Rainer Mohr, Tobias Groezinger and André Zimmermann
Higher energy efficiency, more compact design, and longer lifetime of light-emitting diodes (LEDs) have resulted in increasing their market share in the lighting industry, especially in the industries of consumer electronics, automotive, and general ligh...
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Yong-Sin Syu and Yung-Chun Lee
This paper proposes a lens design method for effectively collimating the light emitting from a light-emitting diode (LED). This collimating lens contains two aspherical lens surfaces which can be mathematically characterized using a few designing paramet...
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Dohyun Kim, Keun Man Song, UiJin Jung, Subin Kim, Dong Su Shin and Jinsub Park
In this study, we investigated the effects of InGaN/GaN-based interlayer (IL) and electron emitting layer (EEL) consisting of a GaN barrier layer grown with different metal-organic (MO) precursors of gallium (Ga), which were grown underneath the active l...
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Kai Ding, Vitaliy Avrutin, Natalia Izyumskaya, Ümit Özgür and Hadis Morkoç
Compared with conventional display technologies, liquid crystal display (LCD), and organic light emitting diode (OLED), micro-LED displays possess potential advantages such as high contrast, fast response, and relatively wide color gamut, low power consu...
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Weipeng Guan, Jingyi Li, Shangsheng Wen, Xinjie Zhang, Yufeng Ye, Jieheng Zheng and Jiajia Jiang
In this paper, an online to offline (O2O) method based on visible light communication (VLC) is proposed, which is different from the traditional VLC with modulation and demodulation. It is a new VLC with modulation and recognition. We use RGB light emitt...
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Chen Chen, Xiong Deng, Yanbing Yang, Pengfei Du, Helin Yang and Lifan Zhao
In this paper, we propose and evaluate a novel light-emitting diode (LED) nonlinearity estimation and compensation scheme using probabilistic Bayesian learning (PBL) for spectral-efficient visible light communication (VLC) systems. The nonlinear power-cu...
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Nanang Shonhadji
Pág. 427 - 434
The company's commitment to implement Six Sigma has been said to fail, as a quality management strategies, as expected to lead to continuous improvement. This study has its objective to identify the use of Six Sigma as a tool to improve cost management s...
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Jae-Hyun Han and Young-Cheol Lim
In this study, to achieve the constant current drive and brightness control without a separate pulse width modulation (PWM) converter, a single converter is designed and verified by experiment under the condition of a multiple LED light load with differ...
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Chia-Man Chang, Ching-Wen Wang, Meng-Yuan Huang, Chung-I Chen, Kuan-Hung Lin and Chih-Pei Shen
In our previous work, we observed that Oncidesa Gower Ramsey ?Honey Angel? (HA) plants became stunned on hot summer afternoons, and the seasonal trend in solar radiation affected its production schedule by limiting flower yield and quality. The objective...
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Viktorija Va?takaite-Kairiene, Sigita Jurkoniene, Neringa Rasiukeviciute, Rasa Karkleliene and Giedre Samuoliene
This study aims to evaluate the influence of the pre-harvest light-emitting diode (LED) spectrum on the metabolic indices in microgreens during post-harvest storage. Broccoli ?Micro Green? and kale ?Dwarf Blue Green? microgreens were cultivated in a grow...
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Ziqi Peng, Hongzi Bai, Tatsuo Shiina, Jianglong Deng, Bei Liu and Xian Zhang
LED (light-emitting diode)-lidar (light detection and ranging) has gradually been focused on by researchers because of its characteristics of low power, high stability, and safety to human eyes. However, LED-lidar systems are easily disturbed by backgrou...
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Sunghwan Kim and Haiyoung Jung
This study is about an improved high-quality light-emitting diode (LED) converter for a T8 LED tube. The converter is separated into the AC driving circuit and DC driving circuit. Also, the LED tube was applied with an output ripple eliminator for the op...
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Dae-Hwan Park, Seung-Taek Oh and Jae-Hyun Lim
Ultraviolet B (UVB) in sunlight is known to promote health when humans are exposed to optimum sunlight. Proper exposure to ultraviolet B is essential to produce vitamin D in the body, which is a particularly important factor for health. However, there ha...
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