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...
full story at the bottom of the current news page, or
if this is a back issue, go here...
Osram Claims Lab-Produced LED Brightest Ever for Car Headlights
LIGHTimes News Staff
October 14, 2014...At Vision Congress in Paris (October 14 and 15, 2014) Osram Opto
Semiconductors is showcasing an LED for car headlights, which the company says
has three times the luminance of existing versions. The company notes that this
single LED can provide a complete low beam. Whereas several LED chips were
required in the past with the number dependent on the design and the type of
The company says it developed the new LED’s tremendous brightness
using a combination of its ceramic conversion technology, its UX:3 chip
technology, and high-current technology used in projection applications. Osram
Opto boasts that future headlights could be much smaller with every lighting
function smaller than a box of matches.
While currently the LED being showcased is a lab-based result, the company
contends that a low beam unit measuring only 30 mm x 50 mm generating a 1400
lumens from a single LED chip could be a reality in just a few years. The 200
megacandelas per m² LED has three times the luminance of existing LEDs for
these applications. It loses less than ten percent of its intensity even at
high operating temperatures of 85°C, according to the company.
"In developing the LED we applied our extensive experience in projection
applications to combine the high-current technology used in such applications
with UX:3 chip technology and ceramic conversion technology which is standard
practice for white headlight LEDs,“ said Stefan Grötsch, Senior Key
Expert at Osram Opto Semiconductors.
Like the company did with its Osram Ostar used in projection applications,
the company soldered the chip directly to the copper. The copper allows large
amounts of heat from the high-output LED to be dissipated much more easily. The
company says that under laboratory conditions, the light distribution from the
LED proves that it will meet the standards for automotive headlights.
Nanoco and Osram Sign Follow-on Agreement for Joint Development of Quantum Dots for LEDs
LIGHTimes News Staff
October 14, 2014...Nanoco Group plc of Manchester, UK, a developer and manufacturer of
cadmium-free quantum dots and other nanomaterials, reported that it has signed
a follow-on joint development agreement with Osram. Nanoco says that Osram
plans to use the quantum dots in general lighting.
Nanoco points out that producing white light from a blue LED tends to
produce light that is weak in red wavelengths. The deficiency in red
wavelengths results in light that fails to show true colors and lacks warmth.
Nanoco asserts that its quantum dots can potentially overcome these issues,
which the company says are limiting the widespread adoption of LEDs in certain
general lighting applications in which color reproduction is important.
Since 2011, Nanoco has been working with Osram under joint development
agreements with the goal of creating LED lighting with superior performance. So
far, Nanoco says that the companies have made considerable progress in
optimizing the procedure to incorporate Nanoco's cadmium-free quantum dots with
blue LEDs. During this latest phase of work with Osram, which is for a 12-month
period, the companies intend to advance the product development.
Michael Edelman, Nanoco's CEO, said, "We're delighted to sign this
latest joint development agreement with Osram and we are very excited about the
potential of our technology in general lighting. We have worked with Osram
since 2011 and have made significant technical progress towards the development
of an LED incorporating cadmium-free quantum dots and offering substantially
improved color performance."
Mass Production Begins on Seoul Semiconductor’s Acrich MJT 3030
LIGHTimes News Staff
October 14, 2014...Seoul Semiconductor of Seoul, Korea, made available the Acrich MJT 3030 a
new LED in the company's Acrich MJT product family. The company says it
improves on performance and enables lower system costs. The Acrich MJT 3030
employs Seoul Semiconductor’s high-reliability Acrich MJT technology.
According to Seoul Semiconductor, the MJT 3030 LED offers high lm/$ and
improved performance compared to previous versions in a mid-power package.
This new Acrich series measures 3.0mm x 3.0mm and delivers 103 lumens at
40mA at 22V, 25° C, 3000K. The 3030 LED can be driven to a maximum current of
60mA at high voltage to provide up to 155 lumens. At high voltage and 60 mA it
consumes 1.5 W for over 103 lm/W efficacy. The company designed the LED for
high-lumen applications that require high reliability and low cost. Seoul
points out that Energy Star® qualification is easier with the already completed
6,000 hours LM-80 data of the Acrich MJT 3030 LED.
The LED uses the company’s high voltage architecture and its Acrich
MJT "Multi-Junction chip Technology". The company claims that the Acrich MJT
3030 LED eliminates the tradeoff between size and efficacy. The LED allows
operation in either DC or AC mode, depending on your configuration. The Acrich
IC reportedly eliminates the need for an AC/DC converter and is said to improve
reliability and simplify integration when making lighting fixtures.
The MJT 3030 boasts low THD and a 0.97 power factor both help save energy
and optimize designs. In the DC-mode, according to the company, the low-current
use of the Acrich MJT 3030 can reduce the cost of the power supply and lower
the number of components. The company contends that the Acrich MJT 3030 LED
optimizes performance in both AC and DC configurations.
"The new Acrich MJT 3030 LED combines the improved performance and high
lm/$ with the reliability of the MJT technology enabling lighting manufacturers
to create new innovative solutions to address a wide range of lighting
applications,” said Seoul Semiconductor executive vice president of
lighting sales, Jay Kim.
Duke Researchers Speed Up Fluorescence for Faster Turn-on LEDs
LIGHTimes News Staff
October 14, 2014...Duke Researchers Speed Up Fluorescence for Faster Turn-on LEDs
Duke University researchers have made fluorescent molecules emit photons of
light 1,000 times sooner after being turned on than normal. While LEDs appear
to turn on instantly, they are apparently not fast enough to make light-based
communications truly practical. Modern telecommunications systems, operate
nearly a thousand times faster. Atoms in an LED can emit about 10,000 photons
when the LED is turned on. The researchers sandwiched fluorescent molecules
between metal nanocubes and a gold film to achieve record photon emission rates
from the molecules. The results appear online October 12 in Nature
“One of the applications we’re targeting with this research
is ultrafast LEDs,” said Maiken Mikkelsen, an assistant professor of
electrical and computer engineering and physics at Duke. “While
future devices might not use this exact approach, the underlying physics will
Mikkelsen’s group created 75-nanometer silver nanocubes and trapped
light between them, producing much more intense light. Through an effect called
Purcell enhancement, the molecules emit photons at a faster rate when
fluorescent molecules are placed near intensified light.
The group with the help of co-author David R. Smith, the James B. Duke
Professor and Chair of Electrical and Computer Engineering at Duke, used
computer simulations to determine the exact size of the gap between the
nanocubes and gold film so that the gap’s resonate frequency maximized
the photon emission rate for the color of light that the molecules respond to.
The optimum gap was just 20 atoms wide. Because the experiment used many
randomly aligned molecules, the researchers believe they can get the emission
rate even higher.
Being a Morning or Evening Person May Be the Result of Light Quality According to Royal Philips
LIGHTimes News Staff
October 9, 2014...A Royal Philips whitepaper has gathered findings from over ten years of
research on the effect of light on human sleep/wake cycles known as
“circadian rhythms”. The whitepaper asserts that the amount and
quality of light a person is exposed to daily may be responsible for their
Monday morning blues. Furthermore, the report claims that the light may
ultimately dictate whether you are a morning person or a night owl.
In humans, the company notes, lighting plays helps regulate circadian rhythm
or body clock. The report says that our circadian rhythms run a little slower
than an artificial clock on average, going for 24 hours and 30 minutes. The
report says that for this reason people are naturally inclined to sleep and
wake 30 minutes later each day. So, if not regulated, our sleep/wake cycle
could be off by more than 2 hours by the end of the week.
Alarm clocks can offer one method of managing the time lag that our
naturally slower circadian rhythm creates. However, Royal Philips says that
scientists recently discovered that the color temperature of light which hits
the photoreceptors in our eyes, specifically its blueness, can regulate our
internal body clock, and can also reset it every single day.
The rising and setting sun has regulated our body clocks like those of many
animals for thousands of years. Today high intensity artificial blue-rich light
can also reset our body clock because of its qualitative resemblance to natural
morning light. Our modern 9 to 5 lifestyle means that we may not be getting
enough sleep with our natural tendency to sleep in. The company notes that
while longer sleep during weekends may compensate for the lack of rest during
the week, it can reset a later circadian rhythm the following week, resulting
in ‘Monday morning blues’.
“The message from nature is clear,” said Light and
Sleep Scientist at Philips Research, Luc Schlangen. “Our bodies have
evolved a kind of steering wheel, constantly adjusting the sleep wake cycle,
driven by light, allowing us to adapt to the differing daylight lengths during
the seasons. We can help regulate our body clock through lighting by providing
light injections at appropriate times, for instance through brighter office
lighting on Monday mornings.”
Philips says that exposure to blue-rich light, which is like natural
sunlight in the morning can speed up our circadian rhythm to wake us
Lighting expert Professor Derk Jan Dijk of the University of Surrey added,
“Dimming lights a few hours before bedtime facilitates a more rapid
onset to sleep and it will prevent your body clock from being shifted to later
hours. If you want to shift your clock to earlier hours it is good to be
exposed to light and specifically high intensity blue-rich light, when you wake
Luminus XNOVA chip-on-board LED Arrays Complete 6000 Hr. LM-80 Testing; Company Offers Limited 5-year Warranty on the Arrays
LIGHTimes News Staff
October 9, 2014...Luminus Devices Inc of Billerica, Massachusetts USA reports that the
company’s XNova COB LED arrays have completed 6000 hour LM-80 testing.
The company says that the arrays demonstrated robust lumen maintenance and long
term color stability under extreme conditions. As a result, the company has
begun offering a five year limited warranty for the XNOVA family of
chip-on-board (COB) arrays designed for both indoor and outdoor directional
“Our XNOVA COB arrays have already been recognized by customers as
having industry-leading efficacy, value, and quality of light, and now we have
long term data and the 5 year warranty to give customers peace of mind knowing
that their fixtures and bulbs will comply with Energy Star and deliver
consistent performance for many years to come," says Jim Miller,
executive, VP of sales & marketing for Luminus. "Our mission is to help
our customers achieve new levels of performance in their end products, so that
they can gain advantages over their competitors, and this 5 year warranty helps
our customers confidently position themselves as providers of robust, long
lasting bulbs and luminaires."
SiliconCore Launches 1.2mm Pixel Pitch LED Display
LIGHTimes News Staff
October 9, 2014...SiliconCore is launching what the company claims to be the highest
resolution LED display ever manufactured, the Lavender 1.2mm. The company will
showcase the new display at Infocomm MEA on Booth TA-120 from 13th – 16th
October in Dubai. The Lavender 1.2mm achieves Full HD in a 110” diagonal
The Common Cathode LED manufacturer claims that the new display is the first
ever to achieve 1.2 mm pixel pitch. The display is ideal for close proximity
viewing within command, control, simulation, as well as corporate or broadcast
viewing. Siliconcore says the display uses a fraction of the power consumption
of traditional displays.
SiliconCore uses what the company calls common cathode technology to drive
the LEDs. It replaces the traditional common anode approach. According to the
company, the common cathode technology design is a much more efficient. It
ensures that less power is wasted as heat and increases the lifespan of the
display for a low total cost of ownership.
Eric Li, President and CEO of SiliconCore commented,
“We have been working towards this product for several years, with
the Orchid 1.9mm and Magnolia 1.50mm pioneering the way for its development, so
we are very proud to finally be shipping."
“With a close proximity viewing distance of less than one metre,
LED is now operating in the same space as existing large format display
technologies. The display also comes with the additional benefit of being
scalable for any size or shape application and due to the nature of LED is
truly seamless. The clarity, uniformity and viewing angle are other market
leading benefits that now new markets can utilise for comfortable large screen
GPE Ardenghi Srl Introduces New Screen Printer With UV LED Curing
October 9, 2014...GPE Ardenghi srl of Hillsboro, Oregon USA, has introduced the new Mod. GPE/24-LED automatic screen printer. UV LED curing technology enables the printer. The new machine can perform screen printing on pens, barrels and other small round articles. The printer employs LED technology from Phoseon that provides the maximum UV output with lower energy consumption, and cooler operating temperatures that allow for printing on heat sensitive substrates.
Our news features are reported
by the LIGHTimes staff writers.
For submissions or content suggestions, you can contact us using
editor -at - sslighting.net
For more information and to reserve promotion space contact
Info8 -at - sslighting.net
or call +1 (512) 257-9888