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Journal articles on the topic 'LEDs'

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1

Schiermeister, Norbert, Lukas Schwenkschuster, Detlef Decker, and Karsten Eichhorn. "LEDs." ATZ worldwide 105, no. 9 (2003): 6–8. http://dx.doi.org/10.1007/bf03224619.

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2

Park, Jongwoon, Taehyun Ban, and Daehyuk Choi. "Organic LEDs Combined With Inorganic LEDs." Journal of Lightwave Technology 29, no. 18 (2011): 2684–89. http://dx.doi.org/10.1109/jlt.2011.2161975.

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3

Hwang, Do-Hoon, Beng Sim Chuah, Xiao-Chang Li, et al. "New luminescent polymers for leds and LECS." Macromolecular Symposia 125, no. 1 (1998): 111–20. http://dx.doi.org/10.1002/masy.19981250109.

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4

Chien, Ming-Chin, and Chung-Hao Tien. "Cluster LEDs mixing optimization by lens design techniques." Optics Express 19, S4 (2011): A804. http://dx.doi.org/10.1364/oe.19.00a804.

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5

Zhu, L., A. Ge, Z. Ge, R. Hao, J. Chen, and X. Tao. "A Fresnel freeform surface collimating lens for LEDs." Lighting Research & Technology 50, no. 6 (2017): 952–60. http://dx.doi.org/10.1177/1477153517712780.

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This paper proposes a freeform surface lens design based on the Fresnel model to achieve a compact structure and good collimation. A simulation indicates the lens enjoys an efficiency as high as 88.43% within a half view angle of 2° for 1 × 1 mm2 size LED. This paper makes a comparison of three types of lens, among which the Fresnel freeform lens achieves the best performance when the LED size is smaller than 2.5 × 2.5 mm2. The influence of the LED size and the manufacturing tolerances are discussed.
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6

Friend, Richard H., Dawei Di, Samuele Lilliu, and Baodan Zhao. "Perovskite LEDs." Scientific Video Protocols 1, no. 1 (2019): 1–5. http://dx.doi.org/10.32386/scivpro.000008.

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Sir Richard H. Friend is Cavendish Professor of Physics at the University of Cambridge. In the 1990s, he reported for the first time efficient operation of polymer based FET and LED, which contributed to the commercialisation of OLED displays employed in current TV and smartphone devices. He is co-founder of several companies and start-ups including Cambridge Display Technology, Plastic Logic, and Heliochrome limited. In this interview, he and Dr. Dawei Di, who recently joined Zhejiang University in China as a tenure-track professor, discuss recent developments and future prospects of perovski
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7

Horiuchi, Noriaki. "Building LEDs." Nature Photonics 5, no. 10 (2011): 571. http://dx.doi.org/10.1038/nphoton.2011.246.

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8

P Caro and Associates Ltd. "Chip LEDs." Displays 7, no. 3 (1986): 142. http://dx.doi.org/10.1016/0141-9382(86)90019-3.

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9

Reuschling, Ralf, and Armin Wedel. "Organische LEDs." Vakuum in Forschung und Praxis 12, no. 6 (2000): 379–81. http://dx.doi.org/10.1002/1522-2454(200012)12:6<379::aid-vipr379>3.0.co;2-n.

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10

Kimura, Goro, Toshihiro Kusama, and Hiroyuki Watanabe. "Performance Evaluation of Low Attracting Insects between Sunlight Type LEDs, High CRI LEDs and White LEDs." JAPAN TAPPI JOURNAL 78, no. 4 (2024): 292–94. http://dx.doi.org/10.2524/jtappij.78.292.

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11

Băjenescu, Titu-Marius I. "DEEP ULTRAVIOLET LIGHT EMITTING DIODES (DUV LEDS)." Journal of Engineering Science XXV (2) (June 15, 2018): 6–19. https://doi.org/10.5281/zenodo.2559253.

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There are a variety of applications for devices that extend into the deep-UV, including biological agent detection and optical storage. The nitride material system is a set of semiconducting compounds that have wavelengths that span a broad range, from yellow to deep-UV. AlGaN has a direct bandgap that extends into the deep-UV range; the device-quality material, is deposited epitaxially using metalorganic chemical vapor deposition on sapphire substrates.&nbsp;
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12

Zhang, Mengqi, Chuantian Zuo, Jianjun Tian, and Liming Ding. "Blue perovskite LEDs." Journal of Semiconductors 42, no. 7 (2021): 070201. http://dx.doi.org/10.1088/1674-4926/42/7/070201.

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13

Chervinsky, M. "Cree power LEDs." ELECTRONICS: Science, Technology, Business, no. 8 (2018): 92–100. http://dx.doi.org/10.22184/1992-4178.2018.179.8.92.100.

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14

Houser, Kevin W. "LLD for LEDs." LEUKOS 8, no. 4 (2012): 233–36. http://dx.doi.org/10.1080/15502724.2012.10732168.

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15

Narukawa, Yukio. "White-Light LEDS." Optics and Photonics News 15, no. 4 (2004): 24. http://dx.doi.org/10.1364/opn.15.4.000024.

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16

Cassarly, William J. "High-Brightness LEDs." Optics and Photonics News 19, no. 1 (2008): 18. http://dx.doi.org/10.1364/opn.19.1.000018.

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17

Rahman, Faiz. "Photonic Crystal LEDs." Optics and Photonics News 20, no. 6 (2009): 24. http://dx.doi.org/10.1364/opn.20.6.000024.

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18

Allen, John. "Firsts for LEDs." Physics World 18, no. 9 (2005): 20. http://dx.doi.org/10.1088/2058-7058/18/9/24.

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19

Stevenson, Richard. "LEDs for less." IEEE Spectrum 49, no. 1 (2012): 39–40. http://dx.doi.org/10.1109/mspec.2012.6117834.

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20

Widstrand, Cynthia G., Jonathan Breitzer, Arthur B. Ellis, George C. Lisensky, and S. Michael Condren. "LEDs Are Diodes." Journal of Chemical Education 78, no. 12 (2001): 1664A. http://dx.doi.org/10.1021/ed078p1664a.

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21

Bradley, David. "Glare-free LEDs." Materials Today 15, no. 12 (2012): 529. http://dx.doi.org/10.1016/s1369-7021(13)70005-1.

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22

Rabinovich, O., S. Sizov, M. Orlova, et al. "AlGaP LEDs optimization." Journal of Physics: Conference Series 1451 (January 2020): 012023. http://dx.doi.org/10.1088/1742-6596/1451/1/012023.

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23

Braun, David. "Semiconducting polymer LEDs." Materials Today 5, no. 6 (2002): 32–39. http://dx.doi.org/10.1016/s1369-7021(02)00637-5.

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24

Donaldson, Laurie. "Improved white LEDs." Materials Today 16, no. 3 (2013): 51–52. http://dx.doi.org/10.1016/j.mattod.2013.03.019.

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25

Quality Technologies (UK) Ltd. "Sub-miniature LEDs." Displays 14, no. 3 (1993): 185. http://dx.doi.org/10.1016/0141-9382(93)90046-8.

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26

Szuromi, P. "Brighter perovskite LEDs." Science 350, no. 6265 (2015): 1217–19. http://dx.doi.org/10.1126/science.350.6265.1217-k.

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27

Han, Jung, Hiroshi Amano, and Leo Schowalter. "Deep UV LEDs." Semiconductor Science and Technology 29, no. 8 (2014): 080301. http://dx.doi.org/10.1088/0268-1242/29/8/080301.

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28

Sommer, F., T. Stephan, F. Vollrath, et al. "III-N based short-wavelength LEDs, LUCO-LEDs, and lasers." phys. stat. sol. (a) 201, no. 12 (2004): 2628–34. http://dx.doi.org/10.1002/pssa.200404983.

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29

Mukai, T., S. Nagahama, T. Yanamoto, et al. "High output power 365 nm ultraviolet LEDs and white LEDs." physica status solidi (c) 2, no. 11 (2005): 3884–86. http://dx.doi.org/10.1002/pssc.200562015.

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30

Thi Giang, Duong, Thuy Linh La, Tran Quoc Tien, Pham Hong Duong, and Quang Cong Tong. "A Simple Designed Lens for Human Centric Lighting Using LEDs." Applied Sciences 10, no. 1 (2020): 343. http://dx.doi.org/10.3390/app10010343.

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Light is generally important for human beings. Visible light supports vision and can modify circadian rhythm, and together with invisible light at longer or shorter wavelength can also make either a direct or indirect impact on human biological and mental health. For medical applications, several studies have shown success in using light to fasten the skin regeneration in burns and to cure diseases such as newborn jaundice. In daily life, an appropriate amount and time exposure to certain types of light can result in rising of alertness and mood improvement, which leads to noticeable growth in
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31

Sivakumar, V., and U. V. Varadaraju. "Intense Red Phosphor for White LEDs Based on Blue GaN LEDs." Journal of The Electrochemical Society 153, no. 3 (2006): H54. http://dx.doi.org/10.1149/1.2163781.

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32

Syu, Yong-Sin, and Yung-Chun Lee. "Quantitative Evaluation of Light Collimating for Commercial UV-LEDs Based on Analytic Collimating Lens." Applied Sciences 12, no. 2 (2022): 911. http://dx.doi.org/10.3390/app12020911.

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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 parameters, and hence is called an analytic collimating lens. An optical ray-tracing algorithm has been developed for these analytic collimating lenses to analyze their optical performance and to optimize their designs. Six high-power and commercially available ultraviolet (UV) LEDs are chosen as examples for demonstrating the optimal collimating lens
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33

Pacchioni, Giulia. "Highly efficient perovskite LEDs." Nature Reviews Materials 6, no. 2 (2021): 108. http://dx.doi.org/10.1038/s41578-021-00280-5.

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34

KAMAKURA, Koji. "Image Sensors Meet LEDs." IEICE Transactions on Communications E100.B, no. 6 (2017): 917–25. http://dx.doi.org/10.1587/transcom.2016lci0001.

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35

SHINTANI, Akira. "White LEDs and Lighting." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 86, Appendix (2002): 294–95. http://dx.doi.org/10.2150/jieij1980.86.appendix_294.

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36

TAMULAITIS, GINTAUTAS. "LEDs IN DEVELOPING WORLD." International Journal of High Speed Electronics and Systems 20, no. 02 (2011): 343–58. http://dx.doi.org/10.1142/s0129156411006635.

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Every fifth inhabitant of our planet has no access to electric lighting. Most of them are poor people living in remote areas of developing countries. Recent progress in solid-state lighting technologies offers good opportunities to develop, commercialize and introduce off-grid lighting systems based on application of white light emitting diodes (WLEDs) in combination with photovoltaic solar panels, wind generators or tiny hydro power plants. Though strongly dependent on the mainstream progress in implementation of LEDs for general lighting, application of this technology in developing world ha
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37

Stevenson, Richard. "Explaining LEDs' diminishing returns." IEEE Spectrum 48, no. 11 (2011): 20. http://dx.doi.org/10.1109/mspec.2011.6056609.

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38

Boyce, Peter. "Editorial: LEDs and POEs." Lighting Research & Technology 46, no. 4 (2014): 367. http://dx.doi.org/10.1177/1477153514541611.

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39

Allen, John W. "More on Early LEDs." Physics Today 56, no. 11 (2003): 12–13. http://dx.doi.org/10.1063/1.4796912.

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40

Katayama, K., H. Matsubara, F. Nakanishi, et al. "ZnSe-based white LEDs." Journal of Crystal Growth 214-215 (June 2000): 1064–70. http://dx.doi.org/10.1016/s0022-0248(00)00275-x.

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41

Bradley, David. "European team tunes LEDs." Materials Today 20, no. 10 (2017): 557. http://dx.doi.org/10.1016/j.mattod.2017.11.011.

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42

Bradley, David. "Ultraviolet LEDs for lepidoptery." Materials Today 28 (September 2019): 6. http://dx.doi.org/10.1016/j.mattod.2019.06.014.

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43

Szweda, Roy. "InGaN LEDs still headlining." III-Vs Review 11, no. 4 (1998): 55. http://dx.doi.org/10.1016/s0961-1290(98)80122-1.

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44

Berntsen, Arjan, Yvo Croonen, Coen Liedenbaum, et al. "Stability of polymer LEDs." Optical Materials 9, no. 1-4 (1998): 125–33. http://dx.doi.org/10.1016/s0925-3467(97)00082-7.

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45

Graydon, Oliver. "Spinach fuels organic LEDs." Nature Photonics 5, no. 4 (2011): 198. http://dx.doi.org/10.1038/nphoton.2011.36.

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46

DATADISPLAYPRODUCTS. "Bright LEDs can illuminate." Displays 7, no. 3 (1986): 139. http://dx.doi.org/10.1016/0141-9382(86)90013-2.

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47

Heber, Joerg. "Not-so-rare LEDs." Nature Materials 10, no. 11 (2011): 808. http://dx.doi.org/10.1038/nmat3165.

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48

Sreedhar, K. V. S. "Light Emitting Diodes (LEDs)." IOSR Journal of Electronics and Communication Engineering 9, no. 2 (2014): 07–13. http://dx.doi.org/10.9790/2834-09270713.

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49

Baker, Blane, and Colby Lojka. "LEDs provide 'green' energy." Physics Education 43, no. 2 (2008): 124–25. http://dx.doi.org/10.1088/0031-9120/43/2/f02.

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50

Craford, M. G. "LEDs challenge the incandescents." IEEE Circuits and Devices Magazine 8, no. 5 (1992): 24–29. http://dx.doi.org/10.1109/101.158509.

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