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| LEDs Magazine November/December 2011 issue |
| The November/December 2011 issue of LEDs Magazine is now available. |
| Analog technique simplifies LED dimming in portable applications (MAGAZINE) |
| Products ranging from mobile handsets to LED flashlights require SSL dimming control, explains CHRISTOPHER GLASER, and analog implementations can offer better efficiency than PWM dimming in such products. |
| Matching driver design with LED backlight scheme optimizes energy savings (MAGAZINE) |
| LED backlighting is a requisite for TVs to meet more demanding Energy Star requirements, explains GYAN TIWARY, and matching the driver design to the backlight implementation delivers maximum energy savings. |
| Production testing of HB-LEDs and LED modules demands the right hardware and techniques (MAGAZINE) |
| Cost-effective testing of LEDs and LED modules in a production environment can have a strong influence on manufacturing efficiency, as MARK CEJER explains. |
| LED-based products must meet photobiological safety standards: part 2 (MAGAZINE) |
| The potentially complex procedure of evaluating LED photobiological safety is now a legal requirement in Europe, but few countries have yet followed the European mandatory-testing lead. LESLIE LYONS discusses the implementation of the IEC62471 standard after an in-depth look at the measurement of radiance and irradiance. |
| LED backlight technology offers promising choice for lighting (MAGAZINE) |
| Edge-lit light guides with embedded optics can provide precise light control and high optical efficiency in general-lighting applications, say JOHN LANGEVIN and KENDRA DE BERTI. |
| LED modules simplify luminaire design while Zhaga closes on initial specifications (MAGAZINE) |
| LED-based modules for SSL can simplify product design and even make products field-upgradeable, reports MAURY WRIGHT. Zhaga standards will yield interoperable modular products from multiple vendors. |
| LED revolution advances in China with government backing (MAGAZINE) |
| Despite some quality issues, China now leads the world in the deployment of LED street lights, and the country’s next Five-Year Plan is expected to drive further advancements, writes PHILIP JESSUP. |
| LED drivers represent a critical but confusing market (MAGAZINE) |
| The LED driver market is characterized by complex and dynamic design issues, volatile pricing, varying degrees of integration and customization, and confusing terminology. TOM HAUSKEN makes sense of it all. |
| The elusive “life” of LEDs: How TM-21 contributes to the solution (MAGAZINE) |
| The newly-introduced TM-21 document presents a method for lumen-depreciation projection based on LM-80 data, enabling LED lifetime extrapolations beyond 6000 hours, says ERIC RICHMAN. |
| SIL Europe technology track focuses on design, from optics to luminaires (MAGAZINE) |
| The technology track at Strategies in Light Europe featured several presentations specifically aimed at selecting the right materials, optics, drivers and luminaire designs to best take advantage of LED technology, writes LAURA PETERS. |
| Strategies in Light Europe focuses on LED lighting and market transformation (MAGAZINE) |
| Europe-wide policies related to solid-state lighting, as well as standardization, lighting quality, product labels and global initiatives, were among the many subjects tackled at Strategies in Light Europe 2011. TIM WHITAKER reports.
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| LED industry tales from Taiwan (MAGAZINE) |
| A recent visit to Taiwan highlighted a number of issues in the local LED industry, writes ELLA SHUM, Director of HB-LED Research with strategies unlimited. |
| WEBCAST: Thermal Foldback for LED Lighting |
| This on-demand webcast, available starting December 5, describes a straightforward implementation of a thermal foldback technique for a linear constant-current LED driver using a low-cost NTC sensing resistor. |
| WEBCAST: Status and Diagnostic Indication Using Multiple LEDs |
| This on-demand ON Semiconductor webcast, available starting November 28, discusses some common challenges in LED lighting design and how to overcome these issues. |
| STRATEGICALLY SPEAKING: Chinese LED manufacturing – more than just LEDs |
| Significant investments and subsidies have enhanced Chinese companies’ capabilities to produce not only LED chips and packaged devices, but also materials and equipment used in LED manufacturing, as TOM HAUSKEN explains. |
