Results 261 to 270 of about 60,145 (311)
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1998
Using blue-emitting GaN LEDs on SiC substrate chips as primary light sources, we have fabricated green, yellow, red and white light emitting diodes (LUCOLEDs). The generation of mixed colors, as turquoise and magenta, is also demonstrated. The underlying physical principle is that of luminescence downconversion (Stokes shift), as typical for organic ...
J. Baur, P. Schlotter, J. Schneider
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Using blue-emitting GaN LEDs on SiC substrate chips as primary light sources, we have fabricated green, yellow, red and white light emitting diodes (LUCOLEDs). The generation of mixed colors, as turquoise and magenta, is also demonstrated. The underlying physical principle is that of luminescence downconversion (Stokes shift), as typical for organic ...
J. Baur, P. Schlotter, J. Schneider
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Photometry of diode emitters: light emitting diodes and infrared emitting diodes
Applied Optics, 1991New methods are described for luminous intensity and luminous flux determination for small light sources. Introduction of a special multiple point method and correction techniques for integrating spheres are shown.
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Proceedings of the IEEE, 1972
Light-emitting diodes (LEDs) are devices designed to efficiently convert electrical energy into electromagnetic radiation, most of which is visible to the human eye. Some of the disciplines involved in the understanding and utilization of LEDs are reviewed, with emphasis on the III-V semiconducting compounds and GaP LEDs in particular. Salient features
A.A. Bergh, P.J. Dean
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Light-emitting diodes (LEDs) are devices designed to efficiently convert electrical energy into electromagnetic radiation, most of which is visible to the human eye. Some of the disciplines involved in the understanding and utilization of LEDs are reviewed, with emphasis on the III-V semiconducting compounds and GaP LEDs in particular. Salient features
A.A. Bergh, P.J. Dean
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2011
Lighting technology is continuously improving for greater comfort, higher power efficiency and due to concerns about health and environment issues. The evolution of lighting technology through conversion of electricity into light led to the revolution in Light Emitting Diodes (LEDs).
Ramchandra Pode, Boucar Diouf
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Lighting technology is continuously improving for greater comfort, higher power efficiency and due to concerns about health and environment issues. The evolution of lighting technology through conversion of electricity into light led to the revolution in Light Emitting Diodes (LEDs).
Ramchandra Pode, Boucar Diouf
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1979
The sources of optical radiation between approximately 0.1 μm and 1 μm wavelength (1 μm = 10−6 m) may be classed into two types according to their spectral line width. The communication engineer is aware of the desirability of a signal source which is monochromatic.
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The sources of optical radiation between approximately 0.1 μm and 1 μm wavelength (1 μm = 10−6 m) may be classed into two types according to their spectral line width. The communication engineer is aware of the desirability of a signal source which is monochromatic.
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2006
Revised and fully up-dated, the second edition of this graduate textbook offers a comprehensive explanation of the technology and physics of LEDs such as infrared, visible-spectrum, ultraviolet, and white LEDs made from III-V semiconductors. Elementary properties such as electrical and optical characteristics are reviewed, followed by the analysis of ...
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Revised and fully up-dated, the second edition of this graduate textbook offers a comprehensive explanation of the technology and physics of LEDs such as infrared, visible-spectrum, ultraviolet, and white LEDs made from III-V semiconductors. Elementary properties such as electrical and optical characteristics are reviewed, followed by the analysis of ...
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1990
Light-emitting diodes are simple compact optical sources which have certain attractions for use in digital optical transmission systems. They are easy to fabricate and therefore potentially cheap, can be modulated at high data rates, and emit moderate output powers which can be coupled reasonably efficiently into optical fibres.
M. J. Adams, I. D. Henning
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Light-emitting diodes are simple compact optical sources which have certain attractions for use in digital optical transmission systems. They are easy to fabricate and therefore potentially cheap, can be modulated at high data rates, and emit moderate output powers which can be coupled reasonably efficiently into optical fibres.
M. J. Adams, I. D. Henning
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The Yale Review, 2005 1999
Light Emitting Diodes (LEDs) convert electrical power to generally visible optical power and are simply p-n-junction devices, when biased in the forward direction. They produce light through spontaneous emission whose wavelength is determined by the bandgap of the semiconductor in which the carrier recombination takes place.
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Light Emitting Diodes (LEDs) convert electrical power to generally visible optical power and are simply p-n-junction devices, when biased in the forward direction. They produce light through spontaneous emission whose wavelength is determined by the bandgap of the semiconductor in which the carrier recombination takes place.
openaire +1 more source