Technologies | Thermal Management | Jul 14, 2016

Engineered “Sand” May Help Cool Electronic Devices and LEDs

Engineered “Sand” May Help Cool Electronic Devices and LEDs Giorgia Tech Research reports that Baratunde Cola, associated professor at the George W. Woodruff School of Mechanical Engineering at the Georgia Institute of Technology, would like to put sand into your computer and other electronic devices. Not beach sand, but silicon dioxide nanoparticles coated with a high dielectric constant polymer to inexpensively provide improved cooling for increasingly power-hungry electronic devices. Read more »

Technologies | Thermal Management | Jun 24, 2015

Litecool Turns LED Packaging on Its Side

Litecool's new packaging concept significantly reduces the thermal resistance of LED packages by using a vertical dielectric Litecool has produced LED packages in a vertical orientation rather than horizontal. This means that the dielectric layers only have a minor impact on the thermal performance of the LED package and allow the heat to escape more effectively through the metallic parts of the package. This has significant benefits for flip-chip packaging where dielectric layers are usually very close to the diode. Read more »

Technologies | Thermal Management | Jul 30, 2013

NRL Researchers Discover Novel Material for Cooling of Electronic Devices

Schematic of thermal management in electronics: Local temperature increases occur as a result of current flow in active regions of devices and can lead to degradation of device performance. Materials with high thermal conductivities are used in heat spreading and sinking to conduct heat from the hot regions. (Photo: U.S. Naval Research Laboratory)  A team of theoretical physicists at the U.S. Naval Research Laboratory (NRL) and Boston College has identified cubic boron arsenide as a material with an extraordinarily high thermal conductivity and the potential to transfer heat more effectively from electronic devices than diamond, the best-known thermal conductor to date. Read more »

Technology | Dec 13, 2012

Nature Materials Study: Boosting Heat Transfer with Nanoglue Might also Improve LED Cooling

A team of interdisciplinary researchers at Rensselaer Polytechnic Institute has developed a new method for significantly increasing the heat transfer rate across two different materials. By sandwiching a layer of ultrathin “nanoglue” between copper and silica, the research team demonstrated a four-fold increase in thermal conductance at the interface between the two materials A team of interdisciplinary researchers at Rensselaer Polytechnic Institute has developed a new method for significantly increasing the heat transfer rate across two different materials. Results of the team's study, published in the journal Nature Materials, could enable new advances in cooling computer chips and lighting-emitting diode (LED) devices, collecting solar power, harvesting waste heat, and other applications. Read more »

White Paper | Technology | Aug 02, 2012

SWITCH CEO Reveals Best-Kept Secret in LED Lighting

Switch Lighting offers the full range of A lamps up to an 100W equivalent lamp with approximately 1700lm Tracy Bilbrough, CEO of SWITCH Lighting™, the first company to offer a full family of LED replacements to the incandescent A-Lamp, today revealed for the first time key details behind the company’s core technology to a group of industry insiders during a speech at the LED Show. Bilbrough also introduced SWITCH’s new LQD Cooling System™. Read more »

Technology | Jul 05, 2012

New Thermal Management Product Manufacturing Process Brightens Future of LED Lighting

High-powered LEDs are set to replace conventional lighting in homes and offices in the next decade. The new manufacturing process, liquid forging was developed by John Yong (far left) and his team (from left to right) Steven Tong Kin Kong, Chua Beng Wah and Ho Meng Kwong A new technique for making brighter, longer-lasting LEDs (Light Emitting Diodes) has taken the first leap from research laboratory towards the three-billion-US-dollar global market in high-powered lighting. The new manufacturing system, called liquid forging, dramatically improves the way tiny electronic devices keep cool and looks set to revolutionize production of next generation LEDs. Read more »

White Paper | Technology | Mar 27, 2012

Diamond Brightens the Performance of Electronic Devices and LEDs

While diamonds may be a girl’s best friend, they’re also well-loved by scientists working to enhance the performance of electronic devices Two new studies performed at the U.S. Department of Energy’s Argonne National Laboratory have revealed a new pathway for materials scientists to use previously unexplored properties of nanocrystalline-diamond thin films. While the properties of diamond thin films are relatively well-understood, the new discovery could dramatically improve the performance of certain types of integrated circuits by reducing their "thermal budget." Read more »

Technology | Dec 15, 2011

New Method for Enhancing Thermal Conductivity Could Cool Computer Chips, Lasers, LED's and other Devices

Mechanical engineer Deyu Li in the lab and pair of boron nanoribbons stuck together on a microdevice used to measure thermal conductivity (small image). (Courtesy of the Li Lab & Daniel Dubois/Vanderbilt University) The surprising discovery of a new way to tune and enhance thermal conductivity – a basic property generally considered to be fixed for a given material – gives engineers a new tool for managing thermal effects in smart phones and computers, lasers and a number of other powered devices. Read more »

Technology | Jan 01, 2011

LED – Cooling and Thermal Management

Figure 4 - Often as an application specific heatsink, it is best to use an adapted standard heatsink. As we all know, the life span of an LED depends on the semi-conductor material used as well as the current/heat relationship. The light output of the LED becomes weaker and weaker and once it reaches 50% of its initial value, the life expectancy of the LED has, by definition, been reached. A life span of a few hundred and up to 100,000 hours is possible, but only when avoiding high temperatures which drastically reduce the length of the LED’s life. Read more »

Technology

LED – Cooling and Thermal Management

Dear Sir,   We have LED lights with UL, CE and RoHs on spot lamp, light bulb, down light and high bay light.   JIESEN [...] Read more »

Technology

LED – Cooling and Thermal Management

The full article can be downloaded with an annual subscription to the digital version of LED professional Review (LpR). Details see http://www.led-professional.com/subscribe Read more »

Technology

Thermally Activated Degradation of Phosphor-Converted White LEDs

The full article can be downloaded with an annual subscription to the digital version of LED professional Review (LpR). Details see http://www.led-professional.com/subscribe Read more »

Technology | Apr 29, 2010

Rice Researchers Theorize Acoustic Waves May Cool Microelectronics

rice_univ_thermal_graphene_sound-jpg Acoustic waves traveling along ribbons of graphene might be just the ticket for removing heat from very tiny electronic devices. Read more »

Technology | Mar 23, 2010

Nanowire Advances Promise Improved Light-Emitting Diodes and Solar-Energy Generation

asu_research_nanowire_sm-jpg A recent advance by ASU researchers in developing nanowires could lead to more efficient photovoltaic cells for generating energy from sunlight, and to better light-emitting diodes (LEDs) that could replace less energy-efficient incandescent light bulbs. Read more »

Technology | Mar 08, 2010

MIT Team Coaxes Polymers To Line Up, Transforming Them Into Materials That Could Dissipate Heat

mit_polymerconductor_sm-jpg MIT team has found a way to transform the most widely used polymer, polyethylene, into a material that conducts heat just as well as most metals, yet remains an electrical insulator. Read more »

Technology | Feb 01, 2010

Thermally Activated Degradation of Phosphor-Converted White LEDs

Figure 8 - Optical images of electrical aged device (top), thermal aged device (center), and the cross section of the electrical aged device, along cathode-anode direction. The increasing performances and long lifetime of High Brightness LEDs are still limited by the high temperatures involved. This work shows the results of several accelerated lifetime tests on 1W white LEDs. Two different tests have been carried out: a pure thermal storage at different temperatures and an electrical aging obtained by biasing the LEDs. The impact of high temperatures has been evaluated in terms of flux decay, chromatic properties modification, increase of forward voltage and thermal resistance. A picture of the main degradation mechanisms detected has been provided in detail. Read more »

Technology | Jan 30, 2009

For Refrigeration Problems, a Magnetically Attractive Solution, Maybe for SSL Cooling too

HOW IT WORKS: Conventional and magnetic refrigeration cycles use different physical effects to cool things off. [Top] When a gas is compressed (2), it heats up, but if it is cooled and then allowed to expand (3), its temperature drops much lower than it was originally (4); this principle keeps food in your home refrigerator cool. But a magnetocaloric material [bottom] heats up when magnetized (b); if cooled and then demagnetized (c), its temperature drops dramatically (d). Electricity-guzzling cooling systems could soon be a lot smaller, quieter and more economical thanks to an exotic metal alloy discovered by an international collaboration working at the National Institute of Standards and Technology (NIST)’s Center for Neutron Research (NCNR).* Read more »

Technology | Sep 10, 2008

Optek - Thermal Management - Introduction

Optek presents the research on heat management. Read more »

Technology | Aug 13, 2007

New technology has dramatic chip-cooling potential for future computers - a solution for LED lighting too?

purdue_research_cooling-jpg Researchers have demonstrated a new technology using tiny "ionic wind engines" that might dramatically improve computer chip cooling, possibly addressing a looming threat to future advances in computers and electronics. Read more »

Technology | Jun 04, 2007

New method to cool electronics, harness waste heat and sunlight

Orest Symko demonstrates a device for a promising new technology for capturing heat now wasted during industrial processes and turning it into electric power. Here, Symko uses a battery to heat the device in his hands. The device changes the heat to audible sound, and then into an electric current that makes the light bulb glow. University of Utah physicists developed small devices that turn heat into sound and then into electricity. The technology holds promise for changing waste heat into electricity, harnessing solar energy and cooling computers and radars. Read more »

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EDITORIAL

High Conductive Foils Enabling Large Area Lighting

High Conductive Foils Enabling Large Area Lighting Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP as one of the leading partners for research and development for surface technologies and organic electronics and Sefar AG, a leading manufacturer of precision fabrics from monofilaments, developed a roll-to-roll ... Read more »

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