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| Author | : Sima Tarashioon |
| Publisher | : |
| Total Pages | : |
| Release | : 2014 |
| Genre | : |
| ISBN | : 9789491909115 |
| Author | : Willem Dirk van Driel |
| Publisher | : Springer |
| Total Pages | : 603 |
| Release | : 2017-07-11 |
| Genre | : Technology & Engineering |
| ISBN | : 3319581759 |
In the past four years we have witnessed rapid development in technology and significant market penetration in many applications for LED systems. New processes and new materials have been introduced; new standards and new testing methods have been developed; new driver, control and sensing technologies have been integrated; and new and unknown failure modes have also been presented. In this book, Solid State Lighting Reliability Part 2, we invited the experts from industry and academia to present the latest developments and findings in the LED system reliability arena. Topics in this book cover the early failures and critical steps in LED manufacturing; advances in reliability testing and standards; quality of colour and colour stability; degradation of optical materials and the associated chromaticity maintenance; characterization of thermal interfaces; LED solder joint testing and prediction; common failure modes in LED drivers; root causes for lumen depreciation; corrosion sensitivity of LED packages; reliability management for automotive LEDs, and lightning effects on LEDs. This book is a continuation of Solid State Lighting Reliability: Components to Systems (published in 2013), which covers reliability aspects ranging from the LED to the total luminaire or system of luminaires. Together, these two books are a full set of reference books for Solid State Lighting reliability from the performance of the (sub-) components to the total system, regardless its complexity.
| Author | : S. W. Ricky Lee |
| Publisher | : John Wiley & Sons |
| Total Pages | : 260 |
| Release | : 2021-09-28 |
| Genre | : Technology & Engineering |
| ISBN | : 1118881478 |
FROM LED TO SOLID STATE LIGHTING A comprehensive and practical reference complete with hands-on exercises and experimental data In From LED to Solid State Lighting: Principles, Materials, Packaging, Characterization, and Applications, accomplished mechanical engineers Shi-Wei Ricky Lee, Jeffery C. C. Lo, Mian Tao, and Huaiyu Ye deliver a practical overview of the design and construction of LED lighting modules, from the fabrication of the LED chip to the LED modules incorporated in complete LED lighting fixtures. The distinguished authors discuss the major advantages of solid-state lighting, including energy savings, environmental friendliness, and lengthy operational life, as well as the contributions offered by the packaging of light-emitting diodes in the pursuit of these features. Readers will discover presentations of the technical issues that arise in packaging LED components, like interconnection, phosphor deposition, and encapsulation. They’ll also find insightful elaborations on optical design, analysis, and characterization. Discussions of LED applications, technology roadmaps, and IP issues round out the included material. This important book also includes: Thorough introductions to lighting, photometry, and colorimetry, the fundamentals of light-emitting diodes, and the fabrication of LED wafers and chips Practical discussions of the packaging of LED chips, wafer-level packaging of LED arrays, and optical and electrical characterization Comprehensive explorations of board-level assembly and LED modules and optical and electrical characterization In-depth examinations of thermal management, reliability engineering for LED packaging, and applications for general lighting Perfect for post-graduate students and practicing engineers studying or working in the field of LED manufacturing for solid state lighting applications, From LED to Solid State Lighting: Principles, Materials, Packaging, Characterization, and Applications is also an indispensable resource for managers and technicians seeking a one-stop guide to the subject.
| Author | : National Academies of Sciences, Engineering, and Medicine |
| Publisher | : National Academies Press |
| Total Pages | : 117 |
| Release | : 2017-06-11 |
| Genre | : Science |
| ISBN | : 0309452570 |
The standard incandescent light bulb, which still works mainly as Thomas Edison invented it, converts more than 90% of the consumed electricity into heat. Given the availability of newer lighting technologies that convert a greater percentage of electricity into useful light, there is potential to decrease the amount of energy used for lighting in both commercial and residential applications. Although technologies such as compact fluorescent lamps (CFLs) have emerged in the past few decades and will help achieve the goal of increased energy efficiency, solid-state lighting (SSL) stands to play a large role in dramatically decreasing U.S. energy consumption for lighting. Since the publication of the 2013 National Research Council report Assessment of Advanced Solid-State Lighting, the penetration of SSL has increased dramatically, with a resulting savings in energy and costs that were foreshadowed by that study. What was not anticipated then is the dramatic dislocation and restructuring of the SSL marketplace, as cost reductions for light-emitting diode (LED) components reduced profitability for LED manufacturers. At the same time, there has been the emergence of new applications for SSL, which have the potential to create new markets and commercial opportunities for the SSL industry. Assessment of Solid-State Lighting, Phase Two discusses these aspects of changeâ€"highlighting the progress of commercialization and acceptance of SSL and reviewing the technical advances and challenges in achieving higher efficacy for LEDs and organic light-emitting diodes. This report will also discuss the recent trends in SSL manufacturing and opportunities for new applications and describe the role played by the Department of Energy (DOE) Lighting Program in the development of SSL.
| Author | : |
| Publisher | : |
| Total Pages | : 12 |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
An investigation of an off-the-shelf solid-state lighting device with the primary focus on the accompanied light-emitting diode (LED) electrical driver (ED) has been conducted. A set of 10 EDs were exposed to temperature humidity life testing of 85% RH and 85 C (85/85) without an electrical bias per the JEDEC standard JESD22-A101C in order to accelerate the ingress of moisture into the aluminum electrolytic capacitor (AEC) and the EDs in order to assess the reliability of the LED drivers for harsh environment applications. The capacitance and equivalent series resistance for each AEC inside the ED were measured using a handheld LCR meter as possible leading indications of failure. The photometric quantities of a single pristine light engine were monitored in order to investigate the interaction between the light engine and the EDs. These parameters were used in assessing the overall reliability of the EDs. In addition, a comparative analysis has been conducted between the 85/85 accelerated test data and a previously published high-temperature storage life accelerated test of 135°C. The results of the 85/85 acceleration test and the comparative analysis are presented in this paper.
| Author | : Vinod Kumar Khanna |
| Publisher | : CRC Press |
| Total Pages | : 606 |
| Release | : 2014-06-03 |
| Genre | : Technology & Engineering |
| ISBN | : 1466561092 |
Compared to traditional electrical filaments, arc lamps, and fluorescent lamps, solid-state lighting offers higher efficiency, reliability, and environmentally friendly technology. LED / solid-state lighting is poised to take over conventional lighting due to cost savings—there is pretty much no debate about this. In response to the recent activity in this field, Fundamentals of Solid-State Lighting: LEDs, OLEDs, and Their Applications in Illumination and Displays covers a range of solid-state devices, technologies, and materials used for lighting and displays. It also examines auxiliary but critical requirements of efficient applications, such as modeling, thermal management, reliability, and smart lighting. The book discusses performance metrics of LEDs such as efficiency, efficacy, current–voltage characteristics, optical parameters like spectral distribution, color temperature, and beam angle before moving on to luminescence theory, injection luminescence, radiative and non-radiative recombination mechanisms, recombination rates, carrier lifetimes, and related topics. This lays down the groundwork for understanding LED operation. The book then discusses energy gaps, light emission, semiconductor material, special equipment, and laboratory facilities. It also covers production and applications of high-brightness LEDs (HBLEDs) and organic LEDs (OLEDs). LEDs represent the landmark development in lighting since the invention of electric lighting, allowing us to create unique, low-energy lighting solutions, not to talk about their minor maintenance expenses. The rapid strides of LED lighting technology over the last few years have changed the dynamics of the global lighting market, and LEDs are expected to be the mainstream light source in the near future. In a nutshell, the book traces the advances in LEDs, OLEDs, and their applications, and presents an up-to-date and analytical perspective of the scenario for audiences of different backgrounds and interests.
| Author | : Willem Dirk van Driel |
| Publisher | : Springer Nature |
| Total Pages | : 552 |
| Release | : 2022-01-31 |
| Genre | : Technology & Engineering |
| ISBN | : 3030815765 |
This book aims to provide a comprehensive reference into the critical subject of failure and degradation in organic materials, used in optoelectronics and microelectronics systems and devices. Readers in different industrial sectors, including microelectronics, automotive, lighting, oil/gas, and petrochemical will benefit from this book. Several case studies and examples are discussed, which readers will find useful to assess and mitigate similar failure cases. More importantly, this book presents methodologies and useful approaches in analyzing a failure and in relating a failure to the reliability of materials and systems.
| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 141 |
| Release | : 2013-04-27 |
| Genre | : Science |
| ISBN | : 0309270111 |
The standard incandescent light bulb, which still works mainly as Thomas Edison invented it, converts more than 90% of the consumed electricity into heat. Given the availability of newer lighting technologies that convert a greater percentage of electricity into useful light, there is potential to decrease the amount of energy used for lighting in both commercial and residential applications. Although technologies such as compact fluorescent lamps (CFLs) have emerged in the past few decades and will help achieve the goal of increased energy efficiency, solid-state lighting (SSL) stands to play a large role in dramatically decreasing U.S. energy consumption for lighting. This report summarizes the current status of SSL technologies and products-light-emitting diodes (LEDs) and organic LEDs (OLEDs)-and evaluates barriers to their improved cost and performance. Assessment of Advanced Solid State Lighting also discusses factors involved in achieving widespread deployment and consumer acceptance of SSL products. These factors include the perceived quality of light emitted by SSL devices, ease of use and the useful lifetime of these devices, issues of initial high cost, and possible benefits of reduced energy consumption.
| Author | : Adrian Kitai |
| Publisher | : John Wiley & Sons |
| Total Pages | : 486 |
| Release | : 2016-12-15 |
| Genre | : Technology & Engineering |
| ISBN | : 1119140609 |
LEDs are in the midst of revolutionizing the lighting industry Up-to-date and comprehensive coverage of light-emitting materials and devices used in solid state lighting and displays Presents the fundamental principles underlying luminescence Includes inorganic and organic materials and devices LEDs offer high efficiency, long life and mercury free lighting solutions
| Author | : Mark L. Ayers |
| Publisher | : John Wiley & Sons |
| Total Pages | : 200 |
| Release | : 2012-09-14 |
| Genre | : Technology & Engineering |
| ISBN | : 1118423143 |
Practical tools for analyzing, calculating, and reporting availability, reliability, and maintainability metrics Engineers in the telecommunications industry must be able to quantify system reliability and availability metrics for use in service level agreements, system design decisions, and daily operations. Increasing system complexity and software dependence require new, more sophisticated tools for system modeling and metric calculation than those available in the current literature. Telecommunications System Reliability Engineering, Theory, and Practice provides a background in reliability engineering theory as well as detailed sections discussing applications to fiber optic networks (earth station and space segment), microwave networks (long-haul, cellular backhaul and mobile wireless), satellite networks (teleport and VSAT), power systems (generators, commercial power and battery systems), facilities management, and software/firmware. Programming techniques and examples for simulation of the approaches presented are discussed throughout the book. This powerful resource: Acts as a comprehensive reference and textbook for analysis and design of highly reliable and available telecommunications systems Bridges the fields of system reliability theory, telecommunications system engineering, and computer programming Translates abstract reliability theory concepts into practical tools and techniques for technical managers, engineers and students Provides telecommunication engineers with a holistic understanding of system reliability theory, telecommunications system engineering, and reliability/risk analysis Telecommunications System Reliability Engineering, Theory, and Practice is a must-have guide for telecommunications engineers or engineering students planning to work in the field of telecommunications Telecommunications System Reliability Engineering, Theory, and Practice is a must-have guide for telecommunications engineers or engineering students planning to work in the field of telecommunications.
