Thursday, 30 September 2010
suggested. Laurent Jenck, director of the LED lighting segment at ON Semiconductor, noted that the energy-saving bulbs are increasingly being favoured over incandescent lamps. He explained that LEDs are playing a key role in cell phones, camera flashes, LCD panel backlighting and portable torches, plus interior, exterior, signage and architectural lighting.
The inductor-less solution requires only three external capacitors to complete the driver circuit. High levels of functional integration coupled with thin QFN packages mean that these devices save board space and reduce manufacturing costs. The devices offer up to 93% power efficiency, maximize battery life, and feature 1% current matching accuracy between channels to deliver an extremely even, consistent screen image.
LED open and short-circuit protection, thermal and under-voltage lockout and over voltage protection are provided on all channel outputs to maximize reliability. A soft start function reduces power supply inrush current to maximize battery-operating life. Both drivers are available in a lead-free, thermally enhanced, 20-pin 3mm x 3mm 0.6mm height QFN package.
Wednesday, 29 September 2010
better in different spaces of a home. Take a closer look at the different light bulbs to see where each should be used. The incandescent bulb is the most commonly used light bulb and usually the least expensive. It has a warm, inviting quality and is complimentary to skin tones and psychologically appealing. Incandescent bulbs usually last between 700 to 1,000 hours and can be used with a dimmer; however, they're not as energy-efficient as other options.
Tuesday, 28 September 2010
LM3492 LED driver with dynamic headroom control that accurately and efficiently drives current to two independently dimmable strings of LEDs. The LM3492, a member of National's PowerWise energy-efficient product family, maximizes system efficiency and reduces system complexity and cost in automotive LCD backlight applications. National's LM3492 integrates a boost converter and a two-channel current regulator to efficiently and cost-effectively drive two independently dimmable LED strings with a maximum power of 15W and an output voltage of up to 65V.
named the winners of its eighth annual Lighting for Tomorrow competition, and the focus was squarely on new high efficiency LED designs that could help cut lighting energy use by 25 percent. LEDs (light emitting diodes) also have a big advantage over conventional bulbs when it comes to longevity, which could add even more on top of the $120 billion in energy savings that DOE expects from LEDs over the next 20 years – if enough building owners can be convinced to make the shift.
Monday, 27 September 2010
Can math make art? Can logic inform patterns and sequences that are visually compelling? Is light a medium suitable for the artistic canvas? Clearly, the answer to all those questions is yes, and people like James Turrell and M.C. Escher have offered years of proof of that. LEDs light path to art, But now anyone in or near Silicon Valley has a chance to take in a fantastic collection of light works by the New York-based artist Leo Villareal at the San Jose Museum of Art.
LED lighting to its 827 corporate restaurants.
Friday, 24 September 2010
expanding for the second time in a year. After flirting with China and Malaysia, Cree executives said Monday that the company plans a $135 million expansion that would create an estimated 244 local jobs over the next two years.
reinvent the entire way we think of lighting rooms, by creating wallpaper with tiny LEDs embedded directly into the surface.
Thursday, 23 September 2010
increase yields and lower costs.
On September 24, General Electric will close its lamp plant in Winchester, Virginia. It's the company's last U.S. factory producing plain, old incandescent light bulbs. New energy standards will phase out the old bulbs by 2014, and eventually they'll be all but banned in this country. Millions of Americans will be forced to switch to compact fluorescent bulbs, or CFL's, most of which are made overseas.
Wednesday, 22 September 2010
UK experts have warned that CFL bulbs can trigger migraines, dizziness and loss of focus, as well as increased pain for those with lupus and can cause people with epilepsy to experience symptoms similar to the early stages of a fit. CFL's operate at high frequency using an electronic switching ballast to chop up the 120 volts -- that's how they are able to use less energy when compared to an old-style incandescent bulb. A typical operating frequency for an electronic ballast would be in the region of 20kHz to 100kHz, a frequency range known to produce adverse effects on one's health
50 to 70 percent.
Tuesday, 21 September 2010
eco-friendly step too far. But a dimmer living room and risk of eye-strain may be the least of our worries. In the rush to get us using greener, more energy-efficient light bulbs, authorities here have forgotten to engage in any public information campaign about their health risks.
helping illuminate the future of energy-efficient homes. In a release, the company said its Acriche A3 AC LED is featured in solid state lighting installed throughout an energy-saving home at the Oak Ridge National Laboratories' ZEBRAAlliance project. Molex, Inc. produced the modules, which were designed by Lumenique. ZEBRAAlliance - the Zero Energy Building Research Alliance --is a collaborative effort among Schaad, the Tennessee Valley Authority, the Department of Energy, and the Oak Ridge Labs to field-test two pairs of energy saving residences.
Monday, 20 September 2010
The XLamp ML-E delivers lighting-class performance in applications where a smooth, uniform appearance is required, such as LED fluorescent tube replacement, ceiling-mounted panel lights and under-cabinet lighting. Unlike other low-power LEDs originally developed for consumer electronics and backlighting applications, the XLamp ML-E delivers the segment-leading color binning, efficacy, thermal resistance and the long-term reliability required for ENERGY STAR(R) luminaires and bulbs.
The XLamp ML-E delivers full-size features in a small, affordable package with luminous flux of up to 58 lm at 150 mA in cool white (5000K) and up to 48 lm in warm white (3000K). Like the XLamp MX-6 and MX-3 LEDs, the ML-E provides a tightly controlled uniform angular chromaticity and a 120 degree viewing angle, optimized for distributed lighting applications. The XLamp ML-E also shares the same ANSI-complaint chromaticity binning used by the XLamp XP and MX families of LEDs.
SDK is aiming to reduce impact on the environment and address such issues as the depletion of resources. In its ultrabright LED business, SDK will continue providing energy-saving products in order to contribute to sustainable development of society
Friday, 17 September 2010
breakthrough. Although still at the laboratory stage, it will eventually mean that bulky power electronics and transformers will no longer have to be used with OLED lights, which brings down costs, simplifies design and allows them to be fitted into more products.
unveiled at the Jackson Convention Complex Tuesday morning called "Kinetic Vapor." The artwork depicts an image of water vapor that is created out of reflected natural light and color-shifting LEDs on aluminum wall panels.
Thursday, 16 September 2010
With nominal output current determined by external resistor setting, LED dimming is simply achieved by either a DC voltage or PWM signal on the AL8805's control input. A DC voltage between 0.5V and 2.5V yields an output current between 25% and 100% of nominal, while a PWM signal between normal CMOS or TTL levels offers a highly flexible 1000:1 dynamic dimming range. On/off control is provided via a <0.4V signal applied to the same control input. The LED driver's enhanced switching speed and low on-resistance provide 1MHz switching frequency capability which reduces the size of the external components required in thermally demanding environments. The AL8805 is provided in the SOT23-5 package.
biggest savings, staff said.
Wednesday, 15 September 2010
DIY Analog LED clock from Wellyb00t is based on a PIC 16f877 microcontroller, and will require a keen eye for detail as well as steady hands since hand wiring the spiderweb of connections on the back of the board does take a fair amount of perseverance.
"We are honored to receive the award for best LED interior commercial product," said Dave Ranieri, Vice President and General Manager, Lithonia Lighting Commercial Indoor Products. "The RTLED fixture is an intelligent, controllable and adaptable LED lighting solution designed to meet current and future needs. Volumetric lighting, embedded controls and plug-and-play features make it ideal for various commercial applications, including office, retail, education and healthcare facilities."
First introduced in May 2010 and now available nationally through Lithonia Lighting sales representatives and authorized distributors, the RTLED is a high-quality, volumetric recessed luminaire that delivers ambient white light uniformly throughout an entire space while reducing energy and maintenance costs and a building's environmental footprint. Powered by an advanced LED light engine, the RTLED luminaire delivers an expected 50,000 hour system life and a superior lighting environment: high color rendering (80+ CRI), 3500K color temperature, and full range dimming with 0-10V DC control.
Tuesday, 14 September 2010
powered directly from a mains electricity supply has been developed, claim scientists from Philips Research. The prototype opens the door to OLED systems that can be directly plugged into standard power outlets without the need for bulky power management circuitry. This will reduce the bill of materials and simplify luminaire design for future OLED-based systems aimed at mass-market general illumination applications.
raise about £6m on Aim. If it succeeds, ProPhotonix will become only the second US company to join Aim. The company, which is advised by Libertas Capital, has ambitions to be a market leader in high-brightness, energy-efficient light emitting diode light engines.
Monday, 13 September 2010
expensive (though their color temperature issues are being worked out), and CFLs are… well, fluorescent. Nobody likes fluorescent light.
Friday, 10 September 2010
announced on Wednesday that it had sued Lights of America, a light bulb manufacturer based in California, for misrepresenting the light output and life expectancy of its LED bulbs. It is the first F.T.C. case challenging LED marketing claims.
slumped Wednesday as fears resurfaced about weakening demand for equipment such as liquid crystal display screens that use the LED bulbs. Shares of LED-maker Cree Inc. closed down 8.1% to $50.18, Veeco Instruments Inc. (VECO) fell 8.3% to $33.44 and Aixtron AG (AIXG) was 5.3% lower at $24.78.
Thursday, 9 September 2010
additional cost. Traditional halogen bulbs are cheap and reliable, but they leave room for improvement in lighting quality. To help shed some light on the real-world benefits of xenon lighting, and what the future of vehicular illumination might have in store, Metro had an enlightening conversation with Mercedes-Benz’s David Sherrard about the differences in two types of automotive lighting.
saving up to 87 per cent on the monthly electricity bill for traffic signals by replacing all incandescent bulbs with Light Emitting Diode (LED) lamps islandwide over the next 12 months. With some 40 per cent of the LED lamps already installed, a $14-million contract was signed last Friday for work to begin by month-end to replace the remaining 1,990 lamps.
Wednesday, 8 September 2010
disappear from the shelves and be replaced by cheaper Edge LED and plasma screens. That's according to Markus Wagenseil, Panasonic's technical marketing manager. Speaking to TechRadar in Berlin last week, Wagenseil said that Direct LED technology is not viable and will be extinct within two years.
rechargeable LED bulb may function as a normal bulb most of the time, but it has extra features that’ll keep you feeling safe and secure even during bad storms.
Tuesday, 7 September 2010
changing. Federal stimulus money is helping to swap out some of the lights in favor of new, energy efficient L.E.D. bulbs. The bulbs can cut costs and greenhouse gasses, and while Arlington installs them, frame changes will lower light pollution.
coming to an intersection near you. It's part of a Montana Department of Transportation project replacing old incandescent street lights. Any intersection on a state or federal roadway will get the upgrade. Missoula City workers say the new lights will cut down significantly on the power needed to run the streetlights
Monday, 6 September 2010
collaboration with Hong Kong’s Quantum Lighting Products Ltd to develop an LED retrofit for E26-base incandescent light bulbs. Using LUXEON Rebel LEDs made by Philips Lumileds of San Jose, CA, USA, the retrofits are being marketed through Japanese retail stores under the country’s Elpa brand, and are available in four cool- and warm-white models designed to replace 40W and 60W bulbs.
The perimeter of Buckhead Marketplace parking garage is now brilliantly illuminated with the Redbird LED Vapor Tight Luminaries (40 watt). Redbird LED selected this product to enhance the lighting of parking spaces and walls along the periphery of the parking garage. The field adjustable illumination pattern allows the walls to be washed with light without any glare to pedestrians. The Vapor Tight Luminaries have a 50,000 hour lifetime, which reduces maintenance and energy costs for the shopping center owner. The Redbird LED parking garage LED lighting uses high efficacy linear light modules with controlled directional intensity which can be adjusted as needed on installation. The directionality of the Vapor Tight Luminaries was a key feature to provide the right lighting for the parking garage walls.
In addition to energy savings, LED lighting provides many advantages for parking garage owners. LED lights contain no harmful mercury so they do not need to be recycled; they operate much better in cold weather than fluorescent lamps and are more resistant to damage. “LED linear lights were a great solution for the Buckhead Marketplace project. The quality of the lighting has been enhanced and they will realize energy savings for many years” said Jonathan Eppstein, President of Redbird LED.
Friday, 3 September 2010
The LED released today features a clear, untinted plastic case with a lens and viewing angle of 22.5 deg., and high light output and visibility performance. With its luminous intensity, the VLHW4100 provides an alternative to incandescent lamps and is intended for a wide range of general and consumer applications, including interior and exterior lighting, outdoor LED panels, light guides, and instrumentation and front panel indicators. The VLHW4100 offers low thermal resistance down to 400 K/W and power dissipation up to 95 mW. Featuring a 22.5 deg. angle of half intensity, the device is luminous categorized, per packaging unit, for luminous intensity and color. ESD-withstand voltage for the LED is up to 2 kV, in accordance with JESD22-A114-B. The device is compliant to RoHS directive 2002/95/EC.
Samples and production quantities of the new VLHW4100 LED are available now with lead times of eight weeks for larger orders. Follow Vishay LEDs at http://twitter.com/vishaylighting.
crime to manufacture or ship for sale a traditional 75-watt incandescent light bulb in the European Union. Autocrats in Brussels last year declared war on Edison's greatest invention with a ban on 100-watt lamps. Homes throughout the Old World will continue to dim until incandescent lighting of all types is snuffed out in 2012 - the same year the United States is scheduled to begin a phaseout schedule mirroring the European plan.
Thursday, 2 September 2010
new LED can replace traditional fluorescent bulbs for all general lighting applications, and also be used for automobile headlights and LCD backlighting.
slimmest full LED 3D TV at the IFA consumer electronics trade show in Berlin from September 3 to 8. At just 0.88cm thin (and a 1.25cm bezel) the LG LEX8 is able to capture what the company says is the "sharpest 3D images on the market."
Wednesday, 1 September 2010
Last week, Digital Lumens announced that Maines Paper & Food Service, Inc., a $3 billion broadline foodservice distributor, has deployed the company's Intelligent Lighting System in its 460,000 square foot headquarters in Conklin, New York. With Digital Lumens' technology, Maines will reduce its lighting-related energy use by 87 percent, and Maines expects to save 1,726,108 kWh per year (more than enough electricity to power 200 homes for a year) and 1,240 metric tons of CO2.