Results 261 to 270 of about 6,640,031 (344)

Clinical Experience with Light‐Emitting Diode (LED) Photomodulation

Dermatologic Surgery, 2005
Light-emitting diode (LED) photomodulation is a novel nonthermal technology used to modulate cellular activity with light.We describe our experience over the last 2 years using 590 nm LED photomodulation within a dermatologic surgery environment.Practical use of nonthermal light energy and emerging applications in 3,500 treatments delivered to 900 ...
Robert A, Weiss, David H, McDaniel, Roy G, Geronemus, Margaret A, Weiss, Karen L, Beasley, Girish M, Munavalli, Supriya G, Bellew   +6 more
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Is the light emitting diode (LED) an ultimate lamp?

American Journal of Physics, 2000
Simple diagrams are used to show the transformation of a thin “slab” of intrinsic semiconductor (direct gap, kelec=khole) from an ideal “flat-band” photopumped recombination-radiation light source into an ultimate lamp, a p–n junction light emitting diode (LED).
N. Holonyak
openaire   +2 more sources

Chiral-induced spin selectivity enables a room-temperature spin light-emitting diode

Science, 2021
Spin injection sans magnetism Light-emitting diodes (LEDs) that emit circularly polarized light (spin-LEDs) have potential applications in in three-dimensional displays, bioencoding, and tomography.
Young-Hoon Kim, Ya-Xin Zhai, Hai-Peng Lu, Xin Pan, C. Xiao, E. A. Gaulding, S. Harvey, J. Berry, Z. Vardeny, J. Luther, M. Beard   +10 more
semanticscholar   +1 more source

Light-Emitting Diodes (LEDs) in Dermatology

Seminars in Cutaneous Medicine and Surgery, 2008
Light-emitting diode photobiomodulation is the newest category of nonthermal light therapies to find its way to the dermatologic armamentarium. In this article, we briefly review the literature on the development of this technology, its evolution within esthetic and medical dermatology, and provide practical and technical considerations for use in ...
openaire   +2 more sources

Light Emitting Diodes (LEDs)

1999
One of the most exciting developments in the field of CPs in the last five years was the discovery, first reported by the Cambridge, England group [742], that CPs such as, poly(phenylene vinylene) (P(PV)) could be used as the emissive layer in Light Emitting Diodes (LEDs).
openaire   +1 more source

Use of a Light Emitting Diode (LED) Array for Bilirubin Phototransformation

2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2005
The newborn liver has a limited ability to process unconjugated bilirubin. Thus, infants are prone to an accumulation of unconjugated bilirubin, and can develop jaundice (hyperbilirubinemia). Recently, light emitting diodes (LEDs) which operate in the 410 - 490 nm wavelength range (peak at 475 nm) have been developed.
Harel, Rosen, Arye, Rosen, Danielle, Rosen, Banu, Onaral, Mark, Hiatt   +4 more
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[Light-emitting diodes (LED)].

Annales de dermatologie et de venereologie, 2010
LED home-use is now widely spread. In dermatology, numerous reports have stated their results for many indications: wound healing process, rejuvenation, acne and, of course, photodynamic therapy. Nevertheless, fluence, pulse duration and color of the LED are so variable as it is difficult to bring well codified results.
H, Cartier, A, Le Pillouer-Prost, C, Grognard   +2 more
openaire   +1 more source

PLANT PHYSIOLOGICAL ACCLIMATION TO IRRADIATION BY LIGHT-EMITTING DIODES (LEDS)

Acta Horticulturae, 2007
LEDs may be a suitable light source for future use as assimilation lighting in protected greenhouse cultivation. LEDs have properties which offer advantages compared to other light sources, but which also raise specific research questions. The narrow band spectrum of LEDs enables manufacturers to produce LED based lightsources specifically suitable for
S.W. Hogewoning, G. Trouwborst, G.J. Engbers, J. Harbinson, W. van Ieperen, J. Ruijsch, O. van Kooten, A.H.C.M. Schapendonk, C.S. Pot   +8 more
openaire   +1 more source

Application of the light emitting diodes (LEDs) in optical measurements

SPIE Proceedings, 2003
At current moment the Light Emitting Diodes (LED) have found a great amount of applications in different areas -- for location and communication systems, optical information systems, in architecture light decoration and advertising, traffic signals, etc. In current work we are making attempt to analyze some new possible fields of LED application. Among
Vladimir E. Sabinin, Sergey K. Savelyev, Sergey V. Solk   +2 more
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