Conferences related to Light emitting diodes

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2019 IEEE 69th Electronic Components and Technology Conference (ECTC)

premier components, packaging and technology conference


2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS 2013)

Power conversion and motor drives in the green energy era.


AFRICON 2013

IEEE AFRICON, the top-event of IEEE in Africa, is a forum for professionals, academia and industry to exchange ideas, present their newest research findings and to network.

  • AFRICON 2011

    IEEE AFRICON, the top-event of IEEE in Africa, is a forum for professionals, academia and industry to exchange ideas, present their newest research findings and to network. IEEE AFRICON presents a forum for mainly Electrical, Electronic & IT research with related Mechanical and Civil activities in Africa.

  • AFRICON 2009

    After the recent successful AFRICON Conferences in Botswana and Namibia, the 9th IEEE AFRICON returns in 2009 to where it was first held, back in 1983: Nairobi, Kenya. AFRICON is a forum for professionals, academia and industry to exchange ideas, present their newest research findings and to network.


ESSDERC 2013 - 43rd European Solid State Device Research Conference

The ESSDERC conference provides an annual European forum for the presentation and discussion of recent advances in solid-state devices and process technology. The conference is organized jointly with ESSCIRC (18606), which covers advances in circuit technology.


IEEE SOUTHEASTCON 2013

Region 3 Meeting, Technical papers, student competitions.

  • SOUTHEASTCON 2012

    The annual IEEE SoutheastCon conferences promote all aspects of the theories and applications of the engineering disciplines. Sponsored by the IEEE Region 03, this event attracts researchers, professionals, and students from the Southeast region of the U.S and beyond. SoutheastCon 2012 will be held in Orlando, Florida.

  • SOUTHEASTCON 2011

    IEEE SoutheastCon2011 is the annual IEEE Region 3 technical, professional, and student conference, invites conference refereed and non-refereed technical paper presentations and tutorials that advance the work and careers of conference attendees in the areas of interest for the conference.

  • SOUTHEASTCON 2010

    SoutheastCon 2010 is the Region 3 event which includes a student conference, a technical conference, and the Region 3 business meeting.

  • SOUTHEASTCON 2009

    It is the annual IEEE Region 3 Technical, Professional, and Student Conference. As the premier conference for the IEEE Region 3, it brings together electrical, computer and other engineering and science professionals, faculty and students to share the latest information through technical sessions, tutorials and exhibits. The conference schedule includes: a technical program with seminars, tutorials, and workshops; exhibits; a student program with student competitions; and IEEE regional meetings.

  • SOUTHEASTCON 2008

    SoutheastCon is the Southeastern USA Region of the IEEE's premier conference. It contains three main sections: a technical program, student competitions and regional meetings. SouthEastCon features technical papers, tutorials and exhibits.

  • SOUTHEASTCON 2007

  • SOUTHEASTCON 2006

  • SOUTHEASTCON 2005


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Periodicals related to Light emitting diodes

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Circuits and Systems II: Express Briefs, IEEE Transactions on

Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.


Communications Letters, IEEE

Covers topics in the scope of IEEE Transactions on Communications but in the form of very brief publication (maximum of 6column lengths, including all diagrams and tables.)


Communications Surveys & Tutorials, IEEE

Each tutorial reviews currents communications topics in network management and computer and wireless communications. Available tutorials, which are 2.5 to 5 hours in length contains the original visuals and voice-over by the presenter. IEEE Communications Surveys & Tutorials features two distinct types of articles: original articles and reprints. The original articles are exclusively written for IEEE Communications Surveys & Tutorials ...


Communications, IEEE Transactions on

Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...


Components and Packaging Technologies, IEEE Transactions on

Component parts, hybrid microelectronics, materials, packaging techniques, and manufacturing technology.


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Most published Xplore authors for Light emitting diodes

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Xplore Articles related to Light emitting diodes

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Optimal Precoder for MIMO Schemes in Indoor Wireless VLC Systems

[{u'author_order': 1, u'affiliation': u'Dept. of ECE, Indian Inst. of Sci., Bangalore, India', u'full_name': u'V. Aditya Srinivas'}, {u'author_order': 2, u'affiliation': u'Dept. of ECE, Indian Inst. of Sci., Bangalore, India', u'full_name': u'Yalagala Naresh'}, {u'author_order': 3, u'affiliation': u'Dept. of ECE, Indian Inst. of Sci., Bangalore, India', u'full_name': u'A. Chockalingam'}] 2018 IEEE 87th Vehicular Technology Conference (VTC Spring), None

In multiple-input multiple-output (MIMO) indoor visible light communication (VLC) systems, channel gains are highly correlated. As a result, the bit error rate (BER) of the system is degraded. To improve the BER performance of the system, we propose two precoders, namely, an optimal precoder and a diagonal precoder for MIMO schemes in VLC systems with Nt light emitting diodes (LED) ...


Leaky lightguide/LED row-backlight, column-shutter display

[{u'author_order': 1, u'affiliation': u'Bellcore, Morristown, NJ, USA', u'full_name': u'T. J. Nelson'}, {u'author_order': 2, u'affiliation': u'Bellcore, Morristown, NJ, USA', u'full_name': u'M. Anandan'}, {u'author_order': 3, u'affiliation': u'Bellcore, Morristown, NJ, USA', u'full_name': u'J. W. Mann'}, {u'author_order': 4, u'full_name': u'E. Berry'}] IEEE Transactions on Electron Devices, 1991

The authors arrayed leaky fused-quartz lightguides, each illuminated by GaAlAs light-emitting diodes, to make a row-addressable backlight. It was much more efficient than a DC-plasma row-backlight that was also made. Test patterns were displayed by operating the backlight with a ferroelectric liquid-crystal shutter array, and gray-scale capability was demonstrated


The Pace of Modern Technology

[{u'author_order': 1, u'full_name': u'C. L. Hogan'}] IRE Transactions on Microwave Theory and Techniques, 1958

In 1946, J. H. E. Griffiths published in Nature the first account of an experimental observation of the phenomenon of ferromagnetic resonance. Naturally enough this paper elicited little interest from electrical engineers, nor did the theoretical work of C. Kittel and D. Polder published during the next three years which gave a quantitative explanation of Griffith's experiment. Now, however, approximately ...


Electrical and optical feedback in an InGaAs/InP light-amplifying optical switch (LAOS)

[{u'author_order': 1, u'affiliation': u'Colorado State Univ., Fort Collins, CO, USA', u'full_name': u'S. A. Feld'}, {u'author_order': 2, u'affiliation': u'Colorado State Univ., Fort Collins, CO, USA', u'full_name': u'F. R. Beyette'}, {u'author_order': 3, u'affiliation': u'Colorado State Univ., Fort Collins, CO, USA', u'full_name': u'M. J. Hafich'}, {u'author_order': 4, u'affiliation': u'Colorado State Univ., Fort Collins, CO, USA', u'full_name': u'H. Y. Lee'}, {u'author_order': 5, u'affiliation': u'Colorado State Univ., Fort Collins, CO, USA', u'full_name': u'G. Y. Robinson'}, {u'author_order': 6, u'affiliation': u'Colorado State Univ., Fort Collins, CO, USA', u'full_name': u'C. W. Wilmsen'}] IEEE Transactions on Electron Devices, 1991

A circuit model for optical and electrical feedback has been developed to investigate the cause of negative differential resistance (NDR) switching in a series connected heterojunction phototransistor (HPT) light-emitting diode (LED) device. The model considers optical feedback from the light generated in the LED, electrical feedback from the holes thermally emitted over the LED cladding layer, nonlinear gain of the ...


Summary of LED down light testing and its implications

[{u'author_order': 1, u'affiliation': u'Department of Electrical & Electronics Engineering, Manipal Institute of Technology, Manipal University, Udupi, India', u'full_name': u'K. R. Shailesh'}, {u'author_order': 2, u'affiliation': u'Department of Electrical & Electronics Engineering, Manipal Institute of Technology, Manipal University, Udupi, India', u'full_name': u'Savitha G Kini'}, {u'author_order': 3, u'affiliation': u'Department of Electrical & Electronics Engineering, Manipal Institute of Technology, Manipal University, Udupi, India', u'full_name': u'Ciji Pearl Kurian'}] 2016 10th International Conference on Intelligent Systems and Control (ISCO), None

LED lighting technology is advancing at fast pace, LED lighting products in the market show a wide range of performance characteristics. This work explains the need for trustworthy, fair product performance information to promote the market for LED lighting products. In this work more than 120 LED down lights were tested using industry-approved test procedures and summary of the results ...


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Educational Resources on Light emitting diodes

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eLearning

No eLearning Articles are currently tagged "Light emitting diodes"

IEEE-USA E-Books

  • Practical Thermal Performance of LEDs

    This chapter discusses thermal performance of light emitting diodes (LEDs). The most immediately noticeable performance change of LEDs with temperature is that their forward voltage drops. This is a die phenomenon, and so varies from manufacturer to manufacturer. Thermal effects on electrical performance of LEDs depend only on the die. There are the effects of temperature on the light beyond the efficacy drop. One more performance consideration is the effect of pulsing current into the LED. Pulse¿¿¿width modulation (PWM) of the current into the LED is a preferred method of dimming. The LED itself has a lifetime that is probably enormous, perhaps hundreds of thousands of hours. This lifetime is set by catastrophic failures, such as bond wires breaking or lightning strikes. In a real circuit, the negative feedback effect is overbalanced by a positive feedback effect.

  • Practical Thermal Management of LEDs

    This chapter starts¿¿¿off by giving an easily understood analytical method for calculating thermals. It then turns to an in¿¿¿depth look at the environment in which LEDs operate, and a variety of methods for keeping them cool. The chapter looks at reducing the resistance of the thermal conduction path. This is typically done with a heat sink, a piece of metal attached either directly or indirectly to the LEDs. A thermal resistance that can be minimized is the convection. Convection in air is moderately effective at cooling, but it can be dramatically enhanced by a fan. Fans and blowers work by forcing air to move across the hot surface. One more area that one should consider for reduction of thermal resistance is the thermal radiation. The chapter also considers some thermal management of the ballast. The ballasts are fairly immune to high temperatures.

  • Multicolor Modulation

    This chapter discusses multicolor modulation schemes to satisfy both communication and illumination requirements, introducing color shift keying (CSK), which has been adopted in the IEEE802.15.7 standard. The visible light spectrum is de?ned from 380 nm to 780 nm in wavelength, which is divided into seven frequency bands in the IEEE 802.15.7 standard. The implementation of CSK can use the color band based on the center wavelength of the actual optical source. At the receiver, color calibration should be conducted to compensate the color coordinate errors and cancel the interference among di?erent colors. Besides, other light devices and ambient light may cause multicolor imbalance and multicolor interference as well, which can be compensated by a color calibration at the same time. The quadrilateral can be divided into four smaller triangles each illuminated by the optical sources corresponding to its three vertices. The interleaved bits are used for CSK mapping to modulate the optical sources. At the receiver, a joint MAP‐based soft detection is used to generate the soft information as the input for channel decoder, which exchanges extrinsic information with the channel decoder, and hard decision is only performed when the channel decoder reaches its maximum number of iterations.

  • Practical DC Drive Circuitry For LEDs

    LEDs need to be electrically driven in order to emit light. This chapter discusses how to design DC drive circuitry for LEDs. The fundamental determinant of what type of converter to use for a DC drive is set by the relative values of the supply voltage and the LED voltage. The chapter provides some basic information of batteries and also examines the performance of the batteries. The most basic piece of electrical information about a cell or battery is that it is a voltage source. Cells are actually complicated electrochemical systems. A buck converter can convert an input voltage to a lower output voltage. Switch¿¿¿mode power supplies (SMPS) are used almost universally to convert a source of power into a form suitable for a load. The chapter covers some of the basics of the topologies that will be suitable for driving LEDs from DC sources.

  • Optical MIMO

    This chapter discusses optical multiple‐input multiple‐output (MIMO) techniques for imaging and non‐imaging visible light communication (VLC) systems, including modern optical MIMO, optical spatial modulation (OSM), optical space shift keying (OSSK), and optical MIMO combined with orthogonal frequency division multiplexing (MIMO‐OFDM). Multi‐user precoding techniques for VLC systems are also introduced under lighting constraints. Spatial dimension can be used to improve the spectral e?ciency without extra transmitting power, leading to improved energy e?ciency. Moreover, inter‐channel interference is completely avoided since only one channel is used at a time. Due to its good performance, SM has been applied to the optical domain termed as optical SM (OSM). In a typical indoor scenario, multiple users usually need to be served simultaneously, where the elimination of multiuser interference is crucial. The precoders and decoders for MU‐MIMO in RF communications have been widely studied to cancel the interference.

  • Smart Lighting

    This chapter discusses the concept of smart lighting in smart cities, its development, and its applications. The development of smart lighting technique consists of two stages. The first stage is that the conventional bulbs are replaced by the new technology, light‐emitting diodes (LEDs). The second stage of development of smart lighting is the lighting control algorithm. Adaptive lighting control solutions are the aims for this stage to make smart lighting system have higher performance efficiency, satisfy users' illumination requirements, and provide wireless network connections. Smart lighting technique is one of the most significant branches in smart cities, which can be used in many aspects such as dimmable outdoor environment lighting, vehicle safety, indoor illumination and communications, smart lighting positioning, and so on. The chapter also introduces indoor smart lighting communication principles, power allocation algorithms, and practice considerations. It further defines smart lighting system as a combination system, which includes illumination, safety alarm, positioning, and communication.

  • Practical AC Drive Circuitry For LEDs

    This chapter addresses AC drive circuitry for LEDs. When LED light needs to run off the electrical grid, AC drive circuitry is used. AC power conversion is considerably more complicated than DC. The chapter discusses one of the important safety techniques to be used in the lab: isolating the system from AC line with an isolation transformer. Isolation is also very useful for products for the same reason, although it's not done the same way. The chapter discusses how to select the values of the components. One of the things that make design of AC ballasts much harder than DC is electromagnetic interference (EMI). Governments require that devices that attach to the AC line not produce more than a specific amount of electrical noise. And switch¿¿¿mode power supplies, since they switch at high frequency, generate a lot of noise. The chapter describes how to get AC converter to pass EMI.

  • Signal Processing and Optimization

    This chapter addresses several signal processing and optimization issues for visible light communications (VLCs). An electrical and optical power allocation scheme is introduced to maximize the multiuser sum‐rate in consideration of the luminance, chromaticity, amplitude, and bit error rate constraints for multi‐chip‐based multi‐input single‐output VLC systems. Compared to the phosphor‐converted LEDs, multichip LEDs have higher modulation bandwidth. Since each chip of the multi‐chip LEDs can be modulated independently, parallel communication channels are viable for information transmission. Since the light intensity perceived by human eyes is determined by the average luminous flux, the average luminous flux instead of instantaneous luminous flux is optimized to improve the system performance. Besides, the optimization of the instantaneous luminous flux requires the knowledge of the DC bias for each signal at the receiver, which is impractical for implementation.

  • Performance of OLEDs

    Performance of OLED devices is very important not only in scientific studies but also in applications to practical devices and commercial products. While various characteristics and parameters of OLED devices have already been described in the previous chapters, this chapter explains typical characteristics and parameters of OLED devices and describes current performances of OLEDs. These characteristics are I¿¿¿V¿¿¿L characteristics, efficiencies, and lifetimes. In addition, this chapter describes the temperature elevation phenomenon in OLED devices, which is also important in practical applications because such temperature elevation is closely related to lifetime.

  • Practical System Design With LEDs

    This chapter first discusses printed circuit board (PCB) design for designing light¿¿¿emitting diodes (LEDs). The first step in creating a good PCB is to make a good schematic. A good schematic is more important than it at first seems, for two reasons. In the first place, a good schematic is easy to look at and understand. A second reason a good schematic is important is because it helps generate a good layout. The chapter describes the aspects that are part of the system design of the optics and first deals with lenses. One other aspect of lighting system design is the possibility of an interface of the light with a lighting controller. DALI is a digital addressable lighting interface designed to replace and enhance the traditional 0¿¿¿10V analog dimmer. It is an open¿¿¿lighting control protocol backed by major lighting manufacturers, and it has been established as the de facto control standard in fluorescent ballasts.



Standards related to Light emitting diodes

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Jobs related to Light emitting diodes

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