2008-03-25

ITC Investigating Blue LED/Laser Patent Infringement Case

The US International Trade Commission (ITC) has agreed to institute an investigation based on a complaint filed on 20 February by Gertrude Neumark Rothschild, professor emeritus of Materials Science and Engineering at Columbia University.
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2008-03-17

LEDs Shine in Solid-State Lighting

The use of LEDs for solid-state lighting, rather than as indicators, is poised to make inroads in applications in the automotive, architectural and general illumination markets, according to market analysis firm Yole Developpement. But for the growth to pan out, particularly in the general illumination market, there is still technical work to be accomplished. Although LEDs are prized for their energy efficiency, a great deal of color performance and design and cost optimization remains to be done, and semiconductor companies need to keep improving manufacturing processes.
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2008-03-17

LED Driver ICs: Application Drivers, Technology Developments & Product Introduction Trends

Driven in the short-run primarily by mobile phone handsets, the worldwide white light-emitting diode (LED) market is projected to exceed 20 billion units in 2008. Using higher light-emitting efficiency and lower pricing, an increasing number of white LEDs are being used as backlight for notebook PCs, medium and large LCD TVs, and single-color and full-color outdoor signs. Further growth is expected to come from automotive applications, which are expected to see increased penetration in LED headlamps, as well as LEDs in interior lighting.
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2008-03-13

Benefits and Advantages of LED Over Standard Bulbs

We've likely all experienced the bothersome inconvenience of having to change a light bulb located in a hard-to-reach place. Maybe a lofty porch light burns out, or a chandelier bulb dies. These can be difficult to get to, and many times they are lights that are left on for many hours throughout the day, so they burn out frequently. Luckily, www.besthomeledlighting.com provides a solution in the form of LED light bulbs. This growing technology offers benefits and advantages over standard bulbs in almost every possible category.
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2008-03-10

Replacement of Conventional Light Sources by LED

The latest LED technology opens up wide areas for new applications, new technical possibilities and reduced costs. The main advantages of the state of the art LED light sources are:
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2008-03-06

New Application for LED—LED Printer

What is an LED printer? LED printer was firstly invented by the Okidata co. in Japan and has been put into use for a period of time. Currently, it is developed and manufactured mostly by Japanese companies. The cost of LED printer is lower than laser printer, which scans the information onto the rotating drum through light with high energy and fixed wave band.
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2008-03-04

Bright Future Forecast for Innovative LED Lighting

The success of ScreenSign Arts Ltd's Photometric Edge Lighting Technology, using LED components, suggests it should be possible for the beverage dispensing industry to phase out light bulbs, including mercury-lined fluorescent tubes, sooner rather than later. Christchurch-based ScreenSign Arts began commercialisation of electroluminescence technology in 1998. The company has since negotiated a six-year agreement for distribution of its technology into the beverage sector in North America and Europe.
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2008-02-26

OKI Printing Solutions' Groundbreaking LED Technology is Recognized in Japanese Industry Award

On Mon, 25 Feb 2008, OKI Printing Solutions announced that its revolutionary Epi Film Bonding (EFB) technology has been awarded the most prestigious New Machinery Promotion Award by the Minister of Economy, Trade and Industry (METI) in Japan. EFB has been specifically designed to support OKI Printing Solutions' unique LED printheads. EFB provides an enhancement to the existing LED technology and it reaffirms the company’s position as an innovator and pioneer for adopting LED technology for printers. Benefits of EFB technology:
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2008-02-26

The Luminous Intensity of LEDs

1. Luminance Units1) The unit of Illuminance: Lux (lx)2) The unit of Luminous Flux: Lumen (lm)3) The unit of Luminous Intensity: Candela (cd)The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 ×1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.The energy density striking an object is given in lumens per square meter, generally known as lux.
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2008-02-25

The Benefits of LED Lighting

For now, LED light fixtures are substantially more expensive than their glass competitors. But LED lighting brings significant advantages that Ruud Lighting executives think will steadily steer the industry toward LED — and toward Ruud.Those advantages include:A Energy savings. LEDs are about 50 percent more efficient than high-pressure sodium or metal halide, 35 percent more than fluorescent and 80 percent more than incandescent, said Christopher Ruud, executive vice president for national accounts at Ruud Lighting.
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2008-02-19

Basic Knowledge about Different Kinds of LED Power Supplies

Although LED’s power saving efficiency is higher than ordinary light sources, it can not be connected directly to public grid voltage like those ordinary ones. It should be configured with special voltage switching device which can supply it with rated voltage and current, providing a sound condition for it to function in normally. That is the so-called special power supply for LED.
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2008-02-18

A View on Categories of WLEDs

As we all know, a combination of red, green and blue lights can produce the impression of white light. So does a combination of blue and yellow lights. Most white LEDs (WLEDs) in production today are based on the technology of blue LEDs.1. Mixing the light produced by red, green and blue LEDs to achieve the white light.
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2008-02-18

Many Patents Will Expire in 2010, LED Market Would Be Reformed

It’s forecasted that all the patents related to LED issued since 1990 will expire from 2010 in succession. The former patent structure will have to be adjusted by then, which may lead to reforming LED market. Take Japan for example, which ranks No.1 in LED industry. Nichia had been issued 74 patents from 1991 to 2001, covering LED fabrication, epitaxial wafer, chip manufacturing, chip packaging, processing technology and raw materials such as phosphors, etc. By means of its patents, Nichia monopolized the LED market before the year of 2002 and enjoyed high gross margin.
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2008-01-10

LED Streetlights Cooling Design

When it comes to LED lights, many people focus on lumens and pay less attention to cooling.  In fact, LED lumens are increasing rapidly.  In 2006, lumens per watt in mass production reached 50 and it is still going up fast.  Heat transfer theory has matured, its channels are clear: conduction, convection, radiation and phase change (such as heat pipes).
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2008-01-10

LED and Smart Lighting System

With the improvement of material and spiritual life, people nowadays have more demands to lighting. It is no longer just about lighting. Besides energy-saving, more and more people are using lights to create a harmonious, homey and comfortable environment. 
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2007-12-20

Advantages and Weaknesses of LED Application

Unlike conventional incandescent lamps which need to convert the electricity into thermal energy first and then to light, LED illumination is achieved when a semiconductor crystal is activated so that it directly produces visible light in a desired wavelength range. With the continuous development of lighting technologies, more possible future applications of LEDs will be seen. Advantages and disadvantages of using LEDs are to be discussed as follows. Advantages of LEDs 1. Long Lifespan
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 “As the demands on our customer’s fixtures become more challenging, we need to ensure our Color portfolio enables them to meet these demands. This increase in flux across several key colors will give our customers a significa... READ MORE

Samsung Electronics announced a new family of chip-on-board LED lighting packages, labeled the “Samsung D-series Special Color.” 

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