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Technologies | Optics | Material Science | Jul 04, 2014

Novel Nanoparticle Production Method Could Lead to Better LED Lights, Lenses and Solar Cells

Sandia National Laboratories researchers Dale Huber, left, and Todd Monson have come up with an inexpensive way to synthesize titanium-dioxide nanoparticles, which could be used in everything from solar cells to light-emitting diodes. (Photo by Randy Montoya) Sandia National Laboratories has come up with an inexpensive way to synthesize titanium-dioxide nanoparticles and is seeking partners who can demonstrate the process at industrial scale for everything from solar cells to LEDs. Titanium-dioxide (TiO2) nanoparticles show great promise as fillers to tune the refractive index of anti-reflective coatings on signs and optical encapsulants for LEDs, solar cells and other optical devices. Read more »

Technologies | Measurement | Jun 18, 2014

How Much Can the Color of Nominal CCT Vary?

Color Temperatures The threshold at which a color difference becomes perceptible is defined by a MacAdam ellipse. A MacAdam ellipse is drawn over the color space in such a way that the color at its center point deviates by a certain amount from colors at any point along its edge. The scale of a MacAdam ellipse is determined by the standard deviation of color matching (SDCM). A color difference of 1 SDCM “step” is not visible; 2 to 4 steps is barely visible; and 5 or more steps is readily noticeable. Read more »

Technologies | Engineering | Systems | Mar 21, 2014

Not Just Light Generation - Xicato Calls It "Internet of Lights" or Lighting 2.0

Key properties and features of Lighting 2.0 and the Internet of Lights Xicato, in cooperation with Echelon will demonstrate a new integrated controls approach. What Xicato understnds when saying "Internet of Lights" is already explained shortly on their website. If you are interested in topic like this, don't miss LpR 43. Read more »

Technologies | Electronics | LiFi | Jan 14, 2014

Enhanced Data Transmission for Li-Fi Communications using LED Lighting

Experimental set-up of a Li-Fi receiver Despite continuous improvements in wireless communication technology, e.g. 3G, LTE, 4G etc., a looming crisis is anticipated due to a lack of sufficient radio frequency bandwidth to support the growth in demand for data transmission, in the so called “Spectrum Crunch”. Visible Light Communication (Li-Fi) offers an economical solution. LED lighting is now widely deployed and can, in parallel with its primary function, also be used for wireless communication. Li-Fi demonstrates significant improvements in security, safety and capacity over radio frequency communication, and ease of deployment as compared with fibre-optic cable. The LED link is untethered, enables links with many mobile devices, and is independent of any one host. Improvements to the data rate achievable using LEDs as the transmitter allows services based on Li-Fi concept to outperform other communication modes. 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 »

Technologies | Measurement | Feb 20, 2007

MaxMile Technologies introduces EpiEL mapping system optimized for nitride-based LED applications

epiel2-gif MaxMile Technologies, LLC at Lexington has recently introduced a EpiEL mapping system (EpiEL-700) which is optimized for nitride-based LED applications. Read more »