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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R-LIM: an Affordable Library Search System Based on RFID

[{u'author_order': 1, u'affiliation': u'Soonchunhyang University, Asan, 336-745,Korea', u'full_name': u'Jung-wook Choi'}, {u'author_order': 2, u'affiliation': u'Soonchunhyang University, Asan, 336-745,Korea', u'full_name': u'Dong-ik Oh'}, {u'author_order': 3, u'affiliation': u'Technology, Drexel University, Philadelphia, PA 19104, USA', u'full_name': u'Il-yeol Song'}] 2006 International Conference on Hybrid Information Technology, None

With a large volume of materials today's libraries carry, locating the exact position of materials is time-consuming. This is not true just for poorly managed libraries, but also for well maintained libraries. In the former case, the problem is rather serious. Even though a material is somewhere in the library, if we cannot locate the material, the fundamental roles of ...


A 100MHz real-time tone mapping processor with integrated photographic and gradient compression in 0.13 μm technology

[{u'author_order': 1, u'affiliation': u'Department of Computer Science, National Tsing Hua University, Hsin-Chu, Taiwan, R.O.C', u'full_name': u'Ching-Te Chiu'}, {u'author_order': 2, u'affiliation': u'Department of Electrical Engineering, National Tsing Hua University, Hsin-Chu, Taiwan, R.O.C', u'full_name': u'Tsun-Hsien Wang'}, {u'author_order': 3, u'full_name': u'Wei-Ming Ke'}, {u'author_order': 4, u'full_name': u'Chen-Yu Chuang'}, {u'author_order': 5, u'full_name': u'Jhih-Siao Huang'}, {u'author_order': 6, u'full_name': u'Wei-Su Wong'}, {u'author_order': 7, u'affiliation': u'Department of Computer Science, National Tsing Hua University, Hsin-Chu, Taiwan, R.O.C', u'full_name': u'Ren-Song Tsay'}] 2008 IEEE Workshop on Signal Processing Systems, None

As the advance of high quality displays such as light-emitting diode (LED), liquid-crystal-display (LCD) or laser TV, the importance of a real-time high dynamic range (HDR) data processing for display devices increases significantly. Many tone mapping algorithms are proposed for rendering HDR images or videos on display screens. The choice of tone mapping algorithm depends on characteristics of displays such ...


Ultrashort-pulse Generation From A Diodepumped Self-mode-locked Cr:LiSAF Laser

[{u'author_order': 1, u'affiliation': u'Research Section, Optoelectronics Divisionr Electrotechnical Laboratory, 1-1-4, Umezono, Tsukuba, lbanzki 305, JAPAN', u'full_name': u'S. Uemura'}, {u'author_order': 2, u'full_name': u'K. Miyazaki'}] Lasers and Electro-Optics, 1997. CLEO/Pacific Rim '97., Pacific Rim Conference on, None

First Page of the Article ![](/xploreAssets/images/absImages/00610741.png)


Monolithic KU-band diode phaseshifter

[{u'author_order': 1, u'full_name': u'S. P. Emmons'}, {u'author_order': 2, u'full_name': u'P. L. Noel'}, {u'author_order': 3, u'full_name': u'F. E. Emery'}, {u'author_order': 4, u'full_name': u'B. W. Battershall'}] 1968 International Electron Devices Meeting, None

Recent efforts toward realization of integrated microwave diode phase-shifters have utilized hybrid technology, i.e., ceramic substrates and beam lead diodes. These techniques, however, do not as easily lend themselves to designs at frequencies as high as KU-Band. Small variations in diode placement can cause significant phase errors. Fabrication in monolithic form not only provides the accurate component placement limited only ...


Improvement of BER in LED based indoor communication using overlapping pulse position modulation and LDPC coding

[{u'author_order': 1, u'affiliation': u'Electronics and Communication Engineering Department, SRM University, 603203, India', u'full_name': u'Santosh Kumar Biswal'}, {u'author_order': 2, u'affiliation': u'Department of Electronics and Communication Engineering, SRM University, 603203, India', u'full_name': u'Shanthi Prince'}] 2013 International Conference on Communication and Signal Processing, None

Indoor optical wireless communication systems provide an attractive alternative for realizing next generation wireless local area network. Free space optical (FSO) communication suffers from several challenges in practical deployment. To overcome such limitation various modulation schemes are used. Generally modulation technique like on-off keying is used in visible light communication system to build a basic communication system. The schemes like ...


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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 Introduction To Light

    This chapter covers all the concepts at a practical level for the light emitting diode (LED) lighting engineer. Light source is measured by radiant flux. Photometric quantities are measured in 'lumens'. Photometric quantities are weighed by photopic vision, or bright light vision, as opposed to night vision, or scotopic vision. For every radiometric measure, there is an equivalent photometric measure. The chapter explains difference between luminous flux, luminous intensity, illuminance, and luminance. It compares radiated power of each light to the number of lumens. Light from an LED source depends on the particular phosphor used, and varies by manufacturer. But in general LED sources have a broader spectrum than fluorescents and will have better color rendition. The Commission Internationale de l'Eclairage (CIE) measure for color rendition is the Color Rendition Index (CRI). To find the CRI, a calculated comparison between the test light source and the reference is done with eight Munsell pastel color.

  • 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.

  • 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 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.

  • Flexible OLEDs

    One of the significant advantages of OLEDs is that they can be fabricated on flexible substrates. The use of flexible substrates instead of conventional glass substrates can significantly reduce the thickness and weight of displays and lighting. In addition, flexible OLEDs bring about additional attractive features from the product design point of view, because flexible OLEDs can provide such unique designs as curved, bent, folded, rolled, and ultimately flexible. Moreover, use of flexible substrates has great potential of production innovation such as utilization of roll¿¿¿to¿¿¿roll (R2R) process with low mass¿¿¿production cost. As the candidates for flexible substrates, ultra¿¿¿thin glasses, stainless steel foils and plastic films are well known. This chapter describes current status and future potential of three types of flexible substrates and their applications to flexible OLED displays and lightings.

  • 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.

  • 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.

  • Introduction to Visible Light Communications

    This chapter offers an overview of the history of visible light communication (VLC), its advantages, applications, related modulation and signal processing techniques, and standardization progresses. Higher rate VLC has attracted global research attentions, in particular, from European researchers at the beginning, by maximally exploring the light emitting diodes (LED) capabilities and increasing the spectral e?ciency. An optical diversity scheme was proposed, where the original data and its delayed versions were simultaneously transmitted over orthogonal frequencies. Data rate can be signi?cantly enhanced by employing di?erent degrees of freedom. VLC emerges as an alternative to alleviate radio spectrum crunch. Higher rate VLC has attracted global research attentions, in particular, from European researchers at the beginning, by maximally exploring the LED capabilities and increasing the spectral e?ciency. Visible light communication has many attractive advantages compared to its radio frequency (RF) counterpart, which include wide spectrum, easy implementation, and low cost.

  • Devices: Smartphones

    Smartphones have become the main device to access digital services. Its key advantage is the mobility it offers (always with you), despite its limitations in terms of user interface (small screen in comparable terms, and difficult to use keyboard). There are currently many competitors manufacturing smartphones, most of them from Asia, with the exception of Apple. However, in terms of Operating System, there is a duopoly of Android and iOS. Almost 10 years after its launch, it appears that it is increasingly difficult to innovate in the space of smartphones. However, given the myriad of devices available, its hardware specifications allow plenty of choices for customers.

  • Radio Frequency and Visible Light Communication Internetworking

    Visible light communication internetworking (VLC) is considered to be a promising network technology that can offer high data rates with almost no transmission power consumption. It suffers from some technical limitations that motivate its integration with RF network technologies to enhance the overall network performance. This chapter discusses RF and VLC integration in heterogeneous networks. It presents several integration objectives such as load balancing, throughput maximization and uplink data transmission. The chapter focuses on RF and VLC internetworking for green communications. It presents a radio resource allocation mechanism that can improve downlink energy efficiency in an integrated RF¿¿¿VLC network. The chapter demonstrates the superior performance of the heterogeneous integrated RF¿¿¿VLC network and compares with the benchmarks that support an RF¿¿¿only network or a heterogeneous network consisting of two RF systems, respectively.



Standards related to Light emitting diodes

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Jobs related to Light emitting diodes

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