2015-06-09

Soraa: The Challenge of Flicker in Solid-State Lighting

The last Soraa blog post discussed various consequences of driving LEDs, an inherently DC component, with alternative current. Today,Soraa Chief Scientist Aurelien David takes a closer look at one of the most infamous of these: flicker. Flicker is a hot-button topic these days, and one where LEDs tend to struggle.
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2015-06-08

Japanese Researchers Develop Silicon QD-based White-blue LED

A Si quantum dot (QD)-based hybrid inorganic/organic light-emitting diode (LED) that exhibits white-blue electroluminescence has been fabricated by Professor Ken-ichi SAITOW (Natural Science Center for Basic Research and Development, Hiroshima University), Graduate student Yunzi XIN (Graduate School of Science, Hiroshima University), and their collaborators. A hybrid LED is expected to be a next-generation illumination device for producing flexible lighting and display, and this is achieved for the Si QD-based white-blue LED. For details, refer to "White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode," in Applied Physics Letters; DOI: 10.1063/1.4921415.
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2015-06-08

Dow Corning: Rapid Growth of LED Lighting Driving Adoption of Advanced Silicone Technologies

General lighting applications for LEDs continue to accelerate in China, thanks to improvements in LED power, efficacy and quality, as well as new government mandates that seek to replace conventional incandescent lighting with solid-state sources. According to market analyst TechNavio, China’s LED lighting market will grow at a compound annual growth rate of 26.9% between 2013 and 2018, making the country one of the globe’s largest potential markets for LED lighting. However, as the technology matures, pressure will grow on LED lighting OEMs to offer more differentiated lighting designs within increasingly stringent cost constraints. 
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2015-05-28

GE: Moonlight Isn’t Enough for a Walk by the Sea

As year-round tourist hot-spots, many European seaside towns find that the influx of tourists brings its own unique set of challenges. In order to address safety concerns and minimise the impact on residents, city councils look to make infrastructure investments that improve both the energy efficiency and local ambience of the area.
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2015-05-15

Overview of Global LED Lighting Rebates

With the rapid development of global economy, energy and environment has become one hot topic discussed by us. So far, energy and environment problem has been one of the important factors that retrained economic development. Under such circumstances, many countries have launched key lighting projects and in addition carried out RELEVANT incentives and rebates program. As the 4th generation light source, LED is characterized by energy-efficiency and eco-greenness. LED incentives and rebates programs have risen around the world. Here bellow is the introduction to LED incentives and rebates in some major countries.
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2015-05-11

Data Network Communication at the Speed of Light

In this GE blog entry, Walter Kraus, the chairman of the Li-Fi Consortium, sheds insights on the different Li-Fi technologies available to the market at the moment.
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2015-04-28

LRC Issues New Guide To Selecting LED Troffers

The Lighting Research Center at Rensselaer Polytechnic Institute has released a new guide for contractors and specifiers who are replacing existing fluorescent troffers with new LED troffers or retrofit kits.
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2015-04-21

Soraa: Consumers Confused by Complex LED Metrics

In this blog entry from Soraa, the company addresses some of the challenges the LED industry faces when it comes to applying and explaining the different metrics to LED consumers.
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2015-04-07

Wafer Level Chip Scale LED Package Jumping over Flip Chip CSP LED

No more packaging – Package-less Package. That is the fundamental solution which LED manufacturers are looking for to meet the market demands. Unfortunately, the era of Flip Chip-Chip Scale LED Package (FC CSP LED) is, however, emerging. It will make the time of the wide spread of LED light coming slowly step by step. Any LED manufacturers who aggressively jump over FC CSP LED and current leading-edge packaging technologies would be expected under the paradigm of no more packaging. A little of endeavour has been conducted to fulfil package-less package like Phosphor on Die and Package Free Chip.
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2015-03-30

Important Lessons for Retail Lighting from The Dress that Broke the Internet

In late February, an innocent question raised by Grace Johnston from Scotland as to what color a striped lace dress her mother wore to her wedding on Tumblr went viral on the Internet. Celebrities and public were equally divided as to whether the dress was blue and black or white and gold, and the heated debate went on well into mid-March. Since the incident, there has been many theories ranging from genetics, optical illusion, visual perception, and poor lighting to explain the phenomemnon. LEDinside had an opportunity to speak to Bridgelux experts Maria Topete, and Aaron Merill, Senior Director of Channel Marketing about this rare visual perception phenomenon, and why this is so important for the retail lighting sector.
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2015-03-23

How to Design with GaN Drivers

You may have recently encountered “GaN,” which is replacing silicon (Si) in some key applications for power conversion. In this blog series, “How to design with GaN,” I will take a look at how gallium nitride (GaN) is different from Si and what the key considerations are when creating a power design with GaN.
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2015-03-13

Low Power LED Lighting Trends (V)

This is the fifth and final installment of Fairchild Semiconductor's series on LED lighting trends. In this entry, Fairchild Semiconductor experts will address PAR16,20,30,38 lamps. These lamp types are AC voltage input, power rating between 4W~20W, socket is screw type E26/27 or 2 pin type GU10, as shown in Fig. 1.
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2015-03-13

In-store Lighting, An Underused Resource

Both large department chain stores and smaller outlets usually fail to take advantage of the different options for interior and exterior lighting.
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2015-03-13

LayTec and German University Collaborate on In-situ Photo-Luminescence of Growing III-Nitride LED Structures

In a collaboration between LayTec and Prof. Dirk Rueter´s group at University of Applied Sciences Ruhr West a breakthrough has been achieved regarding the real-time monitoring of InGaN/GaN quantum well emission wavelength during MOCVD growth. It is well known that room temperature wafer based photoluminescence (PL) measurements provide an excellent forecast of the emission wavelength and emission intensity of the later LED devices. Recently, a prototype in-situ PL system worked simulatnneously with a LayTec Pyro 400 in a commercial multi-wafer MOCVD reactor. The related paper [2] was rocketed immediately to the status of  “most downloaded Journal of Crystal Growth articles”  from Science Direct. This  work is supported under grant KF3242801NT3 by BMWi (German Federal Government).
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2015-03-10

Low Power LED Lighting Trends (IV)

In Part III of Fairchild Semiconductors blog series on LED lighting trends we discussed MR11/16 Lamp LED Driver Design Challenges. Now we’ll look at A19, E14/17, E26/27 Bulb Lamp LED Driver Design.
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2015-03-09

Value Adding Lighting for Petrol Stations

Balazs Torok,  Petrol Station Key Account Manager at GE Lighting EMEA, shares some of his insights on how to brighten up petrol stations with proper lighting.
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2015-03-06

Low Power LED Lighting Trends (III)

In Part II of our series on Solutions for Today’s Low Power LED Lighting Trends we listed the many regulatory and industry standards that designers need to account for in order to understand the design constraints of any given project for reducing power losses, power factor correction and low THD in the LED driver. In addition to the regulations and standards discussed, there are a number of other factors that need to be considered that can impact design. These include:
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2015-03-04

Low Power LED Lighting Trends (II)

This is Part II in our five part series that takes a big picture look at today’s low-power LED lighting trends. In Part I we reviewed the worldwide market for LED lighting and predictions for the potential of high-brightness LEDs. In this installment we will look at some of the many driver standards and governmental agency requirements designers need to be aware of.
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2015-03-03

Low Power LED Lighting Trends (I)

This is the first part of Fairchild Semiconductor's five part blog series that will examine LED lighting trends and Fairchild solutions. LED lighting applications fall into three basic input power levels: low-power is less than or up to 20 Watts; mid-power is between 20 Watts and 50 Watts; and high-power is above 50 watts. In the real-world, applications do not always fit nicely in these three buckets, but these power levels align when considering LED driver solutions.
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2015-02-05

The Next Generation of LED Filament Bulbs

Until now, the basic design of an LED lamp has remained fundamentally unchanged. The common formula has been to use a single, high power GaN chip (or a few larger chips), add phosphor (remotely or directly), and drive the chip(s) with as much power as possible to yield the maximum amount of white light. The key to the longevity of the lamps is to effectively dissipate the heat that is generated by the large LED chips. This is why so many LED lamps have large heat sinks added to the base of the lamps.
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2015-02-04

Lumia: Streetlights Replacement Problems and Solutions

  Streetlights are being replaced from conventional technologies and converted into new LED solutions. This is not a new story but we are getting more and more information saying that the change to LED causes problems for people living nearby the newly installed LED streetlights. We at Lumia® would like to explain why this is not a problem for our streetlight solutions and how we are avoiding the issues faced by other streetlight brands.   
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2015-02-03

Team Led by UCLA and Columbia Engineers Uses Disorder to Control Light on a Nanoscale

A breakthrough by a team of researchers from UCLA, Columbia University and other institutions could lead to the more precise transfer of information in computer chips, as well as new types of optical materials for light emission and lasers.
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2015-01-27

Taking Light beyond the Bulb

Now that we’ve flipped the calendar page to January, it’s a chance to celebrate that 2015 has been declared the International Year of Light and Light-based Technologies (IYL 2015) by the United Nations. We don’t take this opportunity – pardon the pun – lightly.  This is for several reasons. First, our jobs revolve around light.  We work for NASA’s Chandra X-ray Observatory, which is a telescope in space that observes X-rays from the Universe. X-rays are a kind of light. In fact, there are many different kinds of light, but only one that the human eye can detect naturally (called optical, or “visible,” light).
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2015-01-13

L.J. Star White Paper Illuminates Diffused Light for Process Vessels

L.J. Star Inc., a leading supplier of sight glass lighting, has released a new white paper that explains why the wrong kind of vessel lighting can make a stainless steel vessel appear scratched or contaminated when it’s really not.
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2015-01-13

What are the Real COB, Flip Chip and Vapor Chamber Technology?

What is “Vapor Chamber” Vapor Chambers provide far superior thermal performance than traditional solid metal Heat spreaders at reduced weight and height. Thermal spread resistance is almost neglectable and thermal resistance is x times lower than (refer to copper, carbon nanotube compound, nano diamond compound). Vapor Chambers enable higher component heat densities and TDPs(Thermal Design Power) at safe operating temperatures, extending the components and products life.
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2015-01-13

Light and Vision: Between an Object and a Subject

Alessandro Farini, head researcher of the Visual Ergonomy Lab at the CNR-National Institute of Optics in Florence, Italy, shares in this UN International Year of Light blog entry the impact of lighting on visual perception.
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2015-01-08

Comprehensive Guide to Existing and Developing SSL Standards

The implementation and development of lighting standards has built up the market’s confidence in the Solid State Lighting (SSL) industry, according to a Leading Testing Laboratories (LTL) report. The U.S. Department of Energy (DOE) has been working closely with standards organizations to provide technical support, covering product performance testing, statistical evaluations, data compilation, analysis, and related documents. Its goal is to quickly develop and implement required SSL product standards.
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2014-12-22

NASA Study Shows Correlation Between Holidays and Global Lighting Intensity

Even from space, holidays shine bright. With a new look at daily data from the NOAA/NASA Suomi National Polar-orbiting Partnership (Suomi NPP) satellite, a NASA scientist and colleagues have identified how patterns in nighttime light intensity change during major holiday seasons – Christmas and New Year's in the United States and the holy month of Ramadan in the Middle East.
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2014-12-11

PECO Helps Customers Keep Holidays Happy and Bright

The holiday season is upon us, bringing decorations, festivities and holiday cheer! PECO offers the following tips and suggestions to get in the holiday spirit while staying safe.
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2014-12-09

New LED Device Tracks Oxygen Levels Underwater for Swim Performance, Muscle Repair

A research article published 5 December describes a new light-based technology for measuring oxygen content in muscles while underwater, valuable information for competitive swimmers as well as patients using water-based therapies to recover from muscle injuries. Authored by researchers from the University of Essex and Artinis Medical Systems, the open-access paper appears in the current issue of the Journal of Biomedical Optics, published by SPIE, the international society for optics and photonics.
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EVERLIGHT ELECTRONICS, a leading player in the global LED and optoelectronics industry, presents four new ceramic high reflective packaged high power automotive LEDs with a Golden Lead Frame in four different colors White, PC-Amber, Red and Su... READ MORE

Lumileds launches its second generation LUXEON CoB Compact Range LEDs, which feature an efficacy and output boost of up to 16% over its previous generation arrays. The new product line reinforces Lumileds le... READ MORE