نتایج جستجو برای: light emitting diode

تعداد نتایج: 421178  

Journal: :journal of dentistry, tehran university of medical sciences 0
sm. abtahi z. khamverdy

statement of the problem: various methods such as light emitting diode (led) have been used to enhance the polymerization of resin-based orthodontic adhesives. there is a lack of information on the advantages and disadvantages of different light curing systems. purpose: the aim of this study was to compare the effect of led and halogen light curing systems on the shear bond strength of orthodon...

Journal: :Journal of the Illuminating Engineering Institute of Japan 2001

Journal: :Optics letters 2014
Son T Le T Kanesan F Bausi P A Haigh S Rajbhandari Z Ghassemlooy I Papakonstantinou W O Popoola A Burton H Le Minh F Cacialli A D Ellis

We present a newly designed polymer light-emitting diode with a bandwidth of ~350  kHz for high-speed visible light communications. Using this new polymer light-emitting diode as a transmitter, we have achieved a record transmission speed of 10  Mb/s for a polymer light-emitting diode-based optical communication system with an orthogonal frequency division multiplexing technique, matching the p...

Journal: :Neuroscience 2006
H L Liang H T Whelan J T Eells H Meng E Buchmann A Lerch-Gaggl M Wong-Riley

Near-infrared light via light-emitting diode treatment has documented therapeutic effects on neurons functionally inactivated by tetrodotoxin or methanol intoxication. Light-emitting diode pretreatment also reduced potassium cyanide-induced cell death, but the mode of death via the apoptotic or necrotic pathway was unclear. The current study tested our hypothesis that light-emitting diode rescu...

Journal: :Physical Review Letters 2010

Journal: :Physical review letters 2010
Patrik Recher Yuli V Nazarov Leo P Kouwenhoven

We consider an optical quantum dot where an electron level and a hole level are coupled to respective superconducting leads. We find that electrons and holes recombine producing photons at discrete energies as well as a continuous tail. Further, the spectral lines directly probe the induced superconducting correlations on the dot. At energies close to the applied bias voltage eV(sd), a paramete...

2012
S. W. Liu Y. Divayana A. P. Abiyasa S. T. Tan H. V. Demir X. W. Sun

Related Articles Gallium nitride-based light-emitting diodes with embedded air voids grown on Ar-implanted AlN/sapphire substrate Appl. Phys. Lett. 101, 151103 (2012) Analysis of the external and internal quantum efficiency of multi-emitter, white organic light emitting diodes Appl. Phys. Lett. 101, 143304 (2012) Analysis of the external and internal quantum efficiency of multi-emitter, white o...

Journal: :IEICE Transactions 2005
Ken Sakuma Naoto Hirosaki Naoki Kimura Masakazu Ohashi Rong-Jun Xie Yoshinobu Yamamoto Takayuki Suehiro Kenichiro Asano Daiichiro Tanaka

White-light emitting diode lamps for general illumination can be realized by a combination of a blue light-emitting diode semiconductor die and phosphors. Newly developed oxynitride and nitride phosphors are promising candidates for this application because they have suitable excitation and emission wavelengths and stable optical properties in a high temperature environment. High brightness war...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید