Still Plenty of LED/Lighting Breakthroughs Left
... For many in the LED industry who have watched, and lived, the steady march of technology for the last decade, it's pretty easy to get jaded about the technology. Not in a bad way, but just a bored kind of one. "Let me guess," they say, "next year we'll...
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Philips Lumileds Launches New Luxeon CoB LEDs for Spotlights
LIGHTimes News Staff
October 21, 2014...Philips Lumileds has introduced a new compact COB LED array with a small 6.5
mm light-emitting surface that is ideal for spotlights. The small Luxeon CoB
1202 array boasts the highest center beam candle power available. The company
says that its small size makes it perfect for PAR and other directional lamps.
The Luxeon CoB 1202s is also available with Philips Lumileds' CrispWhite
Technology, which the company says produces a high color rendering index and
for rich whites, vibrant reds and other colors.
“The 1202s lifts the bar even higher by producing light output in
a smaller, 6.5 mm LES that was only possible previously in 9 mm LES arrays. In
addition, the 1202s does so with a superior CBCP, delivering 65,000 candelas at
a 10˚ beam angle,” said Ahmed Eweida, product manager for the
Luxeon CoB line.
The company first introduced its CrispWhite Technology for retail lighting
in July 2014.
“The response has been tremendous. Shop owners and their customers
clearly prefer LED lighting with CrispWhite over CDM and halogen,”
said Eric Senders, Product Line Director.
The Luxeon CoB range including the 1202s is available in a very warm, 2200K
version for applications requiring a candlelight-like glow. Philips Lumileds
says lighting designers are using the Luxeon CoB 1202s to produce highly
reliable directional lamps. The company has published a full list of compatible
drivers, optics and holders to help speed the time-to-market for downlights and
Flip Chip LEDs and Chip Scale Packaging for LEDs Are Altering Supply Chain, According to Yole Development
LIGHTimes News Staff
October 21, 2014...The product quality of Chinese LED manufacturers has increased to the point
where they are competitive with other global producers of LEDs for general
lighting. In this competitive LED chip market, LED chip manufacturers hope to
improve efficacy, decrease cost, and increase color consistency, according to
Yole Development. Yole asserts that Several LED producers have begun focusing
on Flip Chip (FC) LEDs because of their distinct advantages over vertical LEDs
and conventional horizontally-aligned chips (MESA). Some advantages of FC LEDs
include: a smaller package, the ability to be driven at a higher current and
wire-bonding free design. FC LEDs also tend to have higher efficacy, improved
color consistency, and lower cost.
“The combination of cost reduction and advanced packaging
technologies such as Flip Chip and Chip Scale Package, is changing the LED
industry landscape, especially its supply chain,” Yole reported.
Yole points out that although companies such as Lumileds have employed the
technology for some time, technical and technological barriers such as low
yield regarding bumping/ eutectic process, and the high cost of packaging
equipment limited its adoption industry-wide. However, Yole says the technology
has gradually caught on in flash, backlighting, and lighting markets, becoming
one the most important developing technolgies in the LED sector this year.
“Whereas Flip Chip LED represented only 11% of overall high power
LED packaging in 2013, we expect this component to represent 34% by 2020. Flip
Chip LED will take market share from vertical LED that will represent 27% of
overall high power LED packages by 2020,” said Pars Mukish, senior
market & technology analyst, at Yole Development.
In addition to providing an increased “performance / cost” ratio
in metrics such as lumens/dollar, Flip Chip LEDs are also a key technology that
can enable the development of Chip Scale Packaging (CSP), which is expected to
further reduce costs as chip scale packaging did in silicon ICs. Essentially, a
CSP represents is a single chip, direct-mountable package that is the same size
as the chip. In LEDs CSPs are comprised of a blue FC LED die with a phosphor
layer coating. The primary application of such LED packages is in general
CSPs offer advantages such as better thermal contact to substrates, and
reduced size. However, CSP have eliminated several process steps of traditional
LED packaging, and have prompted some LED chip manufacturers to supply their
products directly to LED module manufacturers. Yole Development sees this as a
growing trend predicting that in the middle and long term, this technology
could make chip manufacturers supply directly to module manufacturers.
Yole says that overall, the rise of FC LEDs and chip-scale packaging is good
news for some, bad news for others. The company predicts that the LED packaging
materials market will grow by a factor x1.5 during the period 2014-2019, driven
by package substrate, phosphor and encapsulant / optic material.
Rutgers Researchers Devise Method for Systematically Creating Rare-Earth Metal Free Phosphor Family
LIGHTimes News Staff
October 21, 2014...Researchers at Rutgers University have devised a light converter (phosphor)
that is not based upon rare earth metals. Such rare metals have few sources and
primarily come from China. Instead of using phosphors such as cerium-doped
yttrium aluminum garnet or (YAG):Ce3, the researchers have developed an
inorganic–organic hybrid phosphor family based on I–VII binary
semiconductors. According to the researchers their hybrid phosphor materials do
not require rare-earth metals. The researchers published their findings in the
Journal of the
American Chemical Society.
The researchers assert that they can be produced using a simple, low-cost
solution process that is easily scalable. The material's emission energy and
band gap, color and intensity can reportedly be systematically tuned. The
researchers noted that the tuning process requires the incorporation of ligands
with suitable electronic properties.
The researchers indicated that some of the compounds that they developed
achieved High quantum efficiency. Therefore, the researchers claim that these
hybrid phosphor materials are promising candidates for eventually replacing
phosphors for general lighting devices.
Jacket Mimics Chameleon
LIGHTimes News Staff
October 21, 2014...Remember those TVs with ambient LEDs that were introduced a few years ago
but never really caught on, a company called Drap og Design has created a
jacket with an analogous, chameleon-like function. Drap og Design's Interacket,
which is presented on maker site Hackaday, allows your jacket to mimic the
colors of objects that you touch. Built in sensors detect the color of objects
you touch with your hands. Strips of RGB LEDs change color to match the color
of the object that your hand touches. The kit uses Adafruit Neopixle LED
strips, Adafruit color sensors, and a pair of Arduino Uno Chips. The system is
powered by a single 9V battery
The kit uses a pair of Arduino Uno chips, Adafruit Neopixel LED strips and
Adafruit color sensors, all powered by a single 9V battery. The jacket itself
is made of reflective foil and diffusive fabric to allow the coat to
prominently display the colors picked up by the sensors. From the video, you
can see that the design groups first prototype is cool but it does not have
practical uses. It is far from the resolution required for practical uses in
defense or military applications.
The company says that it has nearly completed its second prototype of the
Interaket. Who knows what future iterations of the jacket could be capable of.
Drap og Design says it also has other design ideas that it is developing that
attempt to give humans the "powers" that some other animals have. You can check
on their progress on the Drap og Design webpage, or by following them on
DOE Announces Grants Totaling $10 Million for SSL R&D
LIGHTimes News Staff
October 17, 2014...The U.S. Department of Energy (DOE) is offering a total of $10 million for
SSL Development. The DOE announced the funding opportunity on October 14, 2014.
The funding from the (DE-FOA-0001171), will go towards the three existing DOE
SSL R&D program areas: Core Technology Research, Product Development, and
The Core Technology Research program attempts to apply fundamental
scientific concepts to SSL technology improvements. The DOE's SSL Product
Development program intends to use the knowledge from basic or applied research
to develop or improve commercially viable SSL systems, devices and materials.
The goal of the DOE's SSL Manufacturing Technology program is to accelerate SSL
technology adoption through improvements and innovations in manufacturing
innovations that increase consistency and quality while reducing costs.
DOE plans to choose up to ten projects. Concept papers are due by November
14, and applications are due by January 15. In addition, the National Energy
Technology Laboratory will hold a webinar about the funding opportunity
announcement on October 24 at 1:00 p.m. Eastern. More information about the
funding opportunity and the webinar is available at the FOA
Some of the goals of the research and development include maximizing energy
efficiency of SSL products and improving lighting performance, lifetime, and
color quality. Additionally, the DOE hopes the funding will help reduce
luminaire and SSL source costs and maintaining high quality while improving
consistency. The DOE also intends for the funding to encourage sustainability,
growth, and leadership in domestic U.S. manufacturing.
Scientists Create Carbon Nanotube-based Light Source that Behaves Like Cathodes Ray Tubes
LIGHTimes News Staff
October 16, 2014...Scientists from Tohoku University in Japan have created a new type of
energy-efficient flat light source. The light source, which employs carbon
nanotubes, has a very low power consumption of around 0.1 Watt for every hour's
operation. The researchers claim that is about a hundred times lower than that
of an LED.
According to the researchers, the single walled carbon nanotubes and a
phosphor screen act like a field of tungsten filaments shrunk to microscopic
proportions. The scientists detailed the fabrication and optimization of the
light source in an article
appearing in Review of Scientific Instruments, from AIP publishing.
The researchers dispersed a mixture liquid containing highly crystalline
single-walled carbon nanotubes in an organic solvent mixed with a soap-like
chemical known as a surfactant. They "painted" the mixture onto the positive
electrode or cathode. Then, they scratched the surface with sandpaper to form a
light panel. According to the researchers, the light panel that they formed
could produce a large, stable and homogenous emission current with low energy
"Our simple 'diode' panel could obtain high brightness efficiency of 60
Lumen per Watt, which holds excellent potential for a lighting device with low
power consumption," said Norihiro Shimoi, the lead researcher and an
associate professor of environmental studies at the Tohoku University.
For comparison, LEDs can produce over 100 Lumens per Watt and OLEDs (organic
LEDs) around 40. Although the device has a diode-like structure, it functions
more like cathode ray tubes. the carbon nanotubes act as cathodes, and a
phosphor screen in a vacuum cavity acts as the anode.
Under a strong electric field, the cathode emits tight, high-speed beams of
electrons that flow through its sharp nanotube tips in a phenomenon known as
field emission. The electrons then fly through the vacuum in the cavity, and
hit the phosphor screen, causing it to glow.
"We have found that a cathode with highly crystalline single-walled
carbon nanotubes and an anode with the improved phosphor screen in our diode
structure obtained no flicker field emission current and good brightness
homogeneity," Shimoi said.
According to the researchers, field emission electron sources can provide
intense electron beams that are about a thousand times denser than conventional
thermionic cathode (like filaments in an incandescent light bulb). The high
electron beam density translates to lower power consumption during operation
and a much more directional and easily controllable stream of electrons.
Highly crystalline single-walled carbon nanotubes (HCSWCNT) have nearly zero
defects in the carbon network on the surface, Shimoi explained. "The
resistance of cathode electrode with highly crystalline single-walled carbon
nanotube is very low. Thus, the new flat-panel device has smaller energy loss
compared with other current lighting devices, which can be used to make
energy-efficient cathodes that with low power consumption."
"Many researchers have attempted to construct light sources with carbon
nanotubes as field emitter," Shimoi said. "But nobody has developed an
equivalent and simpler lighting device."
The researchers assert that the major step for device manufacture, the wet
coating process, is a low-cost but stable method of fabricating large-area,
uniformly thin films. The flat-plane emission device has the potential to
provide a new approach to lighting, Shimoi said.
Sharon Bahena-Garrido, Norihiro Shimoi, Daisuke Abe, Toshimasa Hojo,
Yasumitsu Tanaka, Kazuyuki Tohji. Review of Scientific Instruments.
October 14, 2014. (DOI:
It can also be accessed at http://scitation.aip.org/content/aip/journal/rsi/85/10/10.1063/1.4895913
Molex Introduces New Lite-Trap™ SMT Wire-to-Board Connector System with Low Profile
LIGHTimes News Staff
October 16, 2014...Molex Incorporated of Lisle, Illinois USA, announced its new
Lite-Trap™ SMT Wire-to-Board Connector System. The new connector system
features an overall compact size that is ideal for thin LED lighting-module
applications. It has a profile height of merely 4.20mm.
The company says that this push-button style connector offers one of the
lowest profiles and wire insertion forces available compared to wire-removable
“With dedication to innovation, Molex meets the needs of LED
lighting manufacturers by designing a connector system that reduces component
height on boards in order to achieve thinner designs and minimize shadowing or
interference with the light source,” commented Goji Tanabe, product
The termination method of the Lite-Trap Connector is similar to the
established Molex Wire Trap Connectors, as well as certain
‘poke-in’ types, but requires a lower wire insertion force.
A stripped wire is inserted into the connector and pushes open a
dual-contact gate-style terminal that ’traps’ the wire. The company
says it offers a secure electrical contact and high wire-retention force. The
company says it is easy for operators to engage and disengage without the use
of a tool. According to Molex, field assembly and removal if need are easy with
The Molex Lite-Trap Connector also includes a long wire insulation design
that offers stable wire placement for added contact and a wire stopper feature
that ensures correct wire insertion depth.
Intelligent LED Solutions Launches New UV LEDs for Industrial Applications
LIGHTimes News Staff
October 16, 2014...Intelligent LED Solutions (ILS) of the UK, has launched new high-power UV
LEDs for industrial applications. The company designed the UV power LED to have
higher thermal endurance, for better reliability at higher temperatures. The UV
LED comes in a range of output powers, package formats and wavelength options
ranging from 365nm to 420nm and output from 320mW to 7000mW.
The high power UV LED range is suited for industrial applications such as
DNA sequencing, counterfeit detection, polymer curing, ink curing, aquarium
lighting, and medical applications. The UV LED has a vertical chip structure on
the company’s patented metal alloy substrate. The LED offers the
company’s advances in optical output and high thermal conductivity.
“UV LED technology is playing an increasing role in industrial
design,” said Adrian Amor, director at ILS. “The new high
power UV LED range pushes the boundaries of what is possible. The high power
LED offers a more efficient and more robust solution for engineers working to
develop demanding applications that require a UV light source.”
“For those exploring UV LED technology for the first time, our
team at ILS are able to provide design support and prototyping within the
European market place,” said Adrian Amor. “We also have
the capability to deliver production LED and assemblies to wherever in the
world that the customer’s manufacturing or assembly is being
ILS is making available star boards with wires, strips and component LEDs
through RS Components.
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