Results 271 to 280 of about 74,429 (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
openaire +1 more source
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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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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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
+4 more sources
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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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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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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Efficiency of Polymer Light‐Emitting Diodes: A Perspective
Advanced Materials, 2022Yungui Li +2 more
exaly
The Yale Review, 2005