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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Hybrid inorganic/organic luminescent devices

[{u'author_order': 1, u'affiliation': u'Nanoelectron. Lab., Cincinnati Univ., OH, USA', u'full_name': u'A.J. Steckl'}, {u'author_order': 2, u'affiliation': u'Nanoelectron. Lab., Cincinnati Univ., OH, USA', u'full_name': u'S. Allen'}, {u'author_order': 3, u'full_name': u'J. Heikenfeld'}] International Semiconductor Device Research Symposium, 2003, 2003

In this paper, we review the field of hybrid I/O luminescent devices (organic LEDs, inorganic LEDs and insulator-based ELDs) that combine inorganic and organic materials. Organic "color changing materials" (CCM) are efficient down-conversion light emitters. Multi-color emission from blue converted into InGaN LED array to green, white, yellow and red emission. Emission spectra from blue, green, and red CCM pumped ...


Session 6 overview: displays & biomedical devices

[{u'author_order': 1, u'affiliation': u'Analog Devices, Wilmington, MA, USA', u'full_name': u'Iliana Fujimori-Chen'}, {u'author_order': 2, u'affiliation': u'TU Berlin, Germany', u'full_name': u'Roland Thewes'}] 2010 IEEE International Solid-State Circuits Conference - (ISSCC), 2010

Advances in capacitive touch-sensor technology, LED dimming controllers for LCD backlight applications and an electronic compensation method to minimize OLED degradation are highlighted in the first 3 papers of this session.


A simple and flexible driver for OLED

[{u'author_order': 1, u'affiliation': u'Inst. of Photoelectron., Nankai Univ., Tianjin, China', u'full_name': u'Shaozhen Xiong'}, {u'author_order': 2, u'full_name': u'Weiliang Xie'}, {u'author_order': 3, u'full_name': u'Ying Zhao'}, {u'author_order': 4, u'full_name': u'Junsong Wang'}, {u'author_order': 5, u'full_name': u'Enfeng Liu'}, {u'author_order': 6, u'full_name': u'Chunya Wu'}] Proceedings of 5th Asian Symposium on Information Display. ASID '99 (IEEE Cat. No.99EX291), 1999

A microcontroller-based driver was designed and developed for dot-matrix displays made with organic light emitting diodes (OLEDs). It was made by modifying driver designed for dot matrix LEDs made with inorganic semiconductors. The driver was designed with adjustable driving frequency, pulse-width, polarity and pulse-amplitude. It is a generalized driver suitable for operating OLED dot matrices made with different electroluminescent organic ...


All-organic integrated emissive pixels

[{u'author_order': 1, u'affiliation': u'Center for Thin Film Devices, Pennsylvania State Univ., University Park, PA, USA', u'full_name': u'H. Klauk'}, {u'author_order': 2, u'full_name': u"B. D'Andrade"}, {u'author_order': 3, u'full_name': u'T.N. Jackson'}] 1999 57th Annual Device Research Conference Digest (Cat. No.99TH8393), 1999

We have fabricated fully-integrated all-organic active matrix emissive pixels in which an organic light emitting diode (LED) is directly integrated into the channel region of an organic thin film transistor (TFT). Charge carriers enter the organic emissive layer directly from the TFT channel, thus eliminating the need for TFT drain and LED anode contacts.


High efficient self-assembly CdSe/ZnS quantum dots light-emitting devices in organic matrix

[{u'author_order': 1, u'affiliation': u'School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Sydney, Australia', u'full_name': u'A. Uddin'}, {u'author_order': 2, u'affiliation': u'School of Materials Science and Engineering, Nanyang Technological University; Singapore 639798', u'full_name': u'C.C. Teo'}] 2010 3rd International Nanoelectronics Conference (INEC), 2010

We have fabricated and investigated the effect of CdSe/ZnS quantum dot (QD) concentrations on self-assembly hybrid organic/inorganic light emitting diodes (QD-OLEDs). The uniform distribution of QDs with controllable density was achieved using the conventional spin-coating method. There was a QD threshold concentration below which there was no emission from the QDs. The estimated QD concentration was around 9 × 10<sup>11</sup> ...


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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 Design of An Automotive Tail Light

    An inexpensive automotive tail light is made from 5mm red light emitting diodes (LEDs). This chapter looks at 5mm red LEDs in surface mount, limiting the search to those with ratings of at least 8000 mcd. That will require about 20 devices. The chapter argues that the design issues with temperature compensation that are complex enough that one can just do the design with 15 LEDs. After the issues and costs are explained, the customer agrees to this, since that's what they wanted anyway. The chapter documents the desired size of the tail light, as well as the desired mean time to failure (MTTF). It also mentions load dump. There are two ways of surviving load dump. The common way for most automotive electronics is to clamp the voltage coming out of the surge protection. The other way of handling load dump is what one is doing with the circuitry.

  • 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.

  • 10 Information: Displays and Memory Devices (1981–2007)

    Ovshinsky's most important energy technologies, thin-film solar cells and NiMH batteries, were major commercial successes. But his information technologies—which were more radically innovative and based on his most original discoveries, the switching effects he first observed in the early 1960s—failed to realize their full commercial potential for ECD. The flat panel displays that Ovshinsky had envisioned in 1968, and which ECD's subsidiary OIS (Optical Imaging Systems) contributed greatly to developing, ended up enriching other companies. Ovonic optical memories, such as rewritable CDs and DVDs, enjoyed a period of commercial success but again mostly profited others. And while many in the semiconductor industry recognized the enormous promise of Ovshinsky's electrical phase-change memory, it lay dormant for years because it was not considered commercially viable. Finally, his innovative cognitive computer, based on a further extension of his phase-change technology, never advanced beyond its research phase.

  • Single Carrier/Carrierless Modulation and Coding

    This chapter presents a review of carrier‐less and single carrier modulation schemes for visible light communication (VLC). The chapter also offers a brief introduction of modulation and coding techniques recently developed for dimming control and flicker mitigation to meet the illumination requirements. Dimming control can be achieved and the simplicity and robustness inherited from pulse position modulation (PPM) can be maintained. CAP is a bandwidth‐efficient two‐dimensional (2‐D) passband transmission scheme. The basic principle of CAP is to choose two orthogonal ?lters to modulate two different data streams, which are combined for simultaneous transmission. Alternatively, the CAP transceiver can be regarded as a trans‐multiplexer. The shaping filter at the transmitter is implemented by an up‐sampled finite impulse response (FIR) window from the original continuous‐time non‐causal signal, while the equalizer at the receiver is down sampled to match the original symbol rate.

  • Practical Design of An LED Light Bulb

    To make the light bulb brighter, the light emitting diodes (LEDs) are also going to have to run hotter. And hotter LEDs means the mean time to failure (MTTF) is going to be less. There are going to be two sources of heat in the LED light bulb design, the ballast and the LEDs. This chapter draws a specification, for marketing sign‐off before the design begins. There are a number of issues that are indirectly addressed in this specification. The chapter talks about total harmonic distortion (THD). While THD has long been familiar to those interested in audio, it is relatively new in the world of power conversion. The chapter provides a summary in words of how the two measures, Flicker Index (FI) and Percent Flicker (%F), are calculated. FI first finds the average light output. The chapter then finds how much of the total light is emitted above that average. % F measures the difference between the brightest light emitted and the dimmest light.

  • Visible Light Communications: Channel and Capacity

    This chapter introduces the channel and capacity of visible light communication (VLC), describing the characteristics of light emitting diode (LED). The basic structure of OLEDs is thin‐film organic semi‐conductors sandwiched between the anode and the cathode. The luminescence mechanism for OLEDs is di?erent from inorganic LEDs. In the recombination of electron‐hole pair, a high‐energy molecular state called singlet or triplet exciton is formed. The exciton would emit the light and its wavelength is related to the emitting layer material rather than the band gap. Since an LED's capacitance and conductance are frequency‐dependent, the polynomial model is not capable of describing the dynamics and memory effects of the LEDs accurately. LED lighting constraints are crucial to modulation and signal processing for VLC systems, which include dimming control, chromaticity control, and ?icker‐free communication. The driver circuit has a set of transistors that combine the dimming signal with the biased modulating signal and switch the LEDs.

  • OLED Materials

    OLED performance is largely dependent upon OLED materials. This chapter describes the classification of OLED materials and typical OLED materials.OLED materials are divided into two types – vacuum evaporation type and solution type – from a process point of view. Vacuum evaporation materials are usually small molecular materials, while solution type materials contain polymers, dendrimers, and small molecular materials. In addition, materials are also divided into fluorescent materials, phosphorescent materials, and thermally activated delayed fluorescent (TADF) materials in terms of emission mechanisms. From the function point of view, OLED materials can be classified as hole injection material, hole transport material, emission material, host material in emissive layer, electron transport material, electron injection material, charge blocking material, etc.Anode and cathode materials are also important, so this chapter also describes anode and cathode materials.In addition, this chapter describes molecular orientations of organic materials because this also influences OLED characteristics.

  • Machine Learning: Anomaly Detection

    It is important to identify deviation from the nominally healthy behavior of the product and detect the onset of the product's potential faults for achieving prognostics and health management (PHM). This chapter offers a comprehensive overview of the research on anomaly detection and discusses the challenges in anomaly detection. For anomaly detection, methods can be categorized into distance‐based, clustering based, classification‐based, and statistical anomaly detection methods. The chapter provides the underlying background of the type of anomalies that can be classified into one of the following categories: point anomalies, contextual anomalies, and collective anomalies. Clustering is the partitioning of a dataset into clusters by maximizing inter‐cluster distances and minimizing intra‐cluster distances. The chapter summarizes the advantages and disadvantages of clustering‐based anomaly detection methods. A self‐organizing maps (SOM), also known as a Kohonen neural network, is a type of unsupervised learning.

  • 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.

  • Practical Characteristics of LEDs

    The first thing to know about light emitting diodes (LEDs), and all diodes, is that they are current devices, not voltage devices. Power supplies for LEDs are typically designed to drive them with a constant current. For easy estimates, the forward voltage of a diode is a constant. Forward voltage depends on the temperature of the die, and this depends on how big the package is. The same diode in a bigger package will stay cooler, and thus have a higher forward voltage. Rectifier diodes and LEDs fall into the unintentional category. If they conduct in the reverse direction, there is an excellent chance that they have broken. Now with rectifier diodes, there is an easy solution. This chapter talks about quite a number of parameters for LEDs, as well as their temperature variations. Realizing how much the variation in some of these parameters influences performance, manufacturers offer binning.



Standards related to Light emitting diodes

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Jobs related to Light emitting diodes

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