DesignLights Consortium Racks Up 50K Listings
... In 1996, the DesignLights Consortium was founded as a regional non-profit whose mission was to serve the Northeast and Mid-Atlantic to accelerate energy efficiency in the building sector through public policy, program strategies and education. As a project of Northeast Energy Efficiency Partnerships (NEEP). In its own (correct) words,...
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Natick Examines the Effects of Shelter Lighting on Soldier Thinking, Mood
LIGHTimes News Staff
July 22, 2014...Researchers at the Natick Soldier Research, Development and Engineering
Center, or NSRDEC, are examining the effects of various types of lighting in
military shelters on soldiers. The Natick Soldier Research, Development and
Engineering Center is part of the U.S. Army Research, Development and
Engineering Command that aims to create technology and engineering solutions
for American soldiers.
NSRDEC's Cognitive Science Team are investigating the effect of lighting on
the ability to perform tasks, visual acuity, mood, or affective state, and
cognitive alertness/awareness. The team is comparing traditional fluorescent
lighting and newer LED lighting at varying color temperatures ranging from
low-color temperatures of yellow and red tinted white light to high-color
temperatures of bluish white. Twenty-four volunteers, soldiers between 18 and
31 years of age, participated in the five-day study,
"This study is important because it is the first study that has considered
the tradeoff between the differences in cost between the lighting technologies
and the impact of the lighting on Soldier mood and performance," Dr. Caroline
Mahoney, leader of the Cognitive Science Team, said.
"There is a ton of past research on what lighting can do to
humans," Breanne Hawes, lead researcher on the project and member of the
cognitive science team said. "It can affect how sleepy you are, your
sleeping patterns, or how productive you are. But this has rarely been studied
as a military application."
"The ultimate aim of the project is to develop efficient spaces that
promote well-being," said Hawes. "We were thinking of Soldiers in
tents doing mission planning. This is where they setup their maps and have
their meetings in shelters, and we wanted to see how the lighting would affect
that especially, among other things."
Dr. Mahoney pointed out that one of the team's goals is to help shape
technology and material development. On this study, the Cognitive Science Team
collaborated with the Shelters Team and the Special Projects Team.
"This (study) was about helping material/product developers and
designers make decisions about the technology," said Hawes. "We were
trying to analyze different lighting systems. Currently, all the tents use
fluorescent lighting, and (the Shelters Team and the Special Projects Team
members) were trying to analyze three LED systems, which are newer lighting
technologies. They were analyzing them based on technological differences, such
as how long they last and how easy they are to set up. So the goal for our
project was to tie in how (the lighting choice) is actually affecting the
people sitting under the lighting, how is it affecting the Soldiers."
Mahoney said, "Ultimately, we want to provide information to predict a
Soldier's abilities in a given context, keep them safe, and optimize
Compared with fluorescent lighting, the NSRDEC researchers found that LED
lighting in a work environment seems to promote a positive mood, increased
alertness, and faster performance on cognitive and visual perception tasks. The
researchers found that soldiers working in fluorescent lighting tended to be
more fatigued, less alert, and more depressed over time. Soldiers under
fluorescent lighting also tended to have slower response times on cognitive
tasks that measured verbal and spatial memory.
"It's important to consider how we can make things so they can perform
their best and help ensure their well-being," Hawes said.
AMOLED Mobile Phone Panel Costs to Fall Below LCD, According to NPD DisplaySearch
LIGHTimes News Staff
July 22, 2014...The difference in price between AMOLED mobile phone panels and TFT-LCD
panels is decreasing, according to NPD DisplaySearch. Production yields of
AMOLED mobile phone panels have reportedly helped reduce the cost difference.
According to the NPD DisplaySearch's OLED Technology Report, the cost of
manufacturing AMOLED panels is currently 10 to 20 percent higher than that of
However, the rapid improvement in AMOLED panel production yields is expected
to result in a lower manufacturing costs for AMOLED mobile phone panels than
LCD mobile phone panels within the next two years, according to NPD
DisplaySearch. The company points out that AMOLED panels were expected to cost
less than LCD panels from close to the beginning of their use in smartphone
displays because they do not require backlighting. However, production
challenges kept AMOLED yields low, increasing production costs. Therefore,
equivalent LCDs cost less. AMOLED panels became high-end products, due to their
high-color gamut, good contrast, and slimness. Production yield improvements
are expected to help broaden the adoption of AMOLED panels into smartphones.
"Until recently, there have been few breakthroughs in the production of
AMOLED displays, and the OLED industry seemed to be facing hard times,"
said Jimmy Kim, senior analyst of display materials and LED at NPD
DisplaySearch. "If AMOLED costs fall below LCDs, as expected, it would lead
to more opportunities for the OLED display industry, greater competition with
LCD, and more choices for consumers."
The company gives the current example of a 16 percent cost difference
between 5-inch AMOLED and LCD (1920 × 1080) mobile phone panels. NPD
DisplaySearch contends that AMOLED panel costs are expected to fall below LCD
panel costs when AMOLED production yields reach 90 percent. The company notes
that if further cost reductions for OLED materials are achieved, then the yield
required for AMOLED panels to be cheaper than LCD will be even lower.
Jacksonville Jaguars to Unveil Largest Ever HD Video Displays
LIGHTimes News Staff
July 22, 2014...On July 26th, 35.5 million LEDs in an enormous HD LED video display will
light up EverBank Field, the home of the Jacksonville Jaguars, in Jacksonville,
Florida. During the game, the world's largest HD LED video display will be
unveilled. EverBank Field will host a soccer match between Fulham F.C. and D.C.
United followed by a concert by country music star Carrie Underwood.
"The Jaguars have done a great job in preparing an exciting unveiling
event for the world's largest video displays," Daktronics vice president
of live events Jay Parker said. "These displays will set a precedent in
professional venues in terms of the fan experience and what can be witnessed by
going to the stadium. The team can show a never before seen combination of
content with essentially three huge HD screens on one massive LED display. It's
going to be amazing when they fire them up to host their first home football
The two massive end zone displays featuring a 13HD pixel layout will each
measure 60 feet high by 362 feet wide. Each display with more than 21,700
square feet of digital canvas is longer than a football field and can feature
three full-size HD windows for maximum versatility during any event. Three
sections of 60 feet high by 106 feet wide provide enough real display space and
allow an extra 44-foot-wide buffer space for additional graphics, statistics
and other content.
The 13HD technology was selected for numerous reasons, especially its high
brightness that helps overcome the direct Florida sunlight. The displays boast
high contrast and wide viewing angles.
ITRI Establishes Alliance for Commercialization of OLEDs
LIGHTimes News Staff
July 22, 2014...Taiwan's Industrial Technology Research Institute initiated the setup of the
Organic Light Emitting Diode Commercialization Alliance (OLCA) to spark the
OLED industry in Taiwan. OLED companies RiTdisplay Corp, WiseChip Semiconductor
Inc, Merck, Corning Incorporated and Tongtai Machine & Tool CO have joined
OLCA Chairman Liu who serves as vice president and general director of the
Electronics and Optoelectronics Research Laboratories at the ITRI, noted that
while fluorescent lamps currently lead in high luminosity and cost-efficiency,
technological development of fluorescents has reached its limit. Technology for
LEDs and OLEDs and their use in general lighting has much room for improvement.
Liu asserts that OLEDs can theoretically achieve higher luminance efficiency
and longer life than fluorescent tubes. Liu noted that OLCA has organized five
committees, which are lamps, lighting design, materials, fixtures and optical
engines. The committees plan to making OLEDs ready for indoor lighting. So far,
more than 60 companies have revealed their interest in working with other OLCA
Philips Lumileds Luxeon CoB with CrispWhite Technology Wins LFI Innovation Award
LIGHTimes News Staff
July 17, 2014...Philips Lumileds' CrispWhite Technology, which was showcased at LightFair
International 2014, was awarded the LFI Innovation Award in the LED/OLED Chips
and Modules category. The company developed the Luxeon CoB with CrispWhite
technology specifically for retail applications including downlights and
spotlights in which store owners and retail customers require the truest color
representation. The company's CrispWhite technology is offered throughout the
Luxeon chip-on-board (CoB) line of arrays. The company boasts that the arrays
deliver the highest combination of lumen density and efficacy available.
The arrays have an output ranging from 1,000-10,000 lumens with a typical
efficacy of 100 lm/W. Thousands of attendees including lighting designers and
professionals got a glimpse at CrispWhite’s ideal light spectrum at
LightFair International 2014 and the Guangzhou International Lighting
Exhibition earlier this month.
“We displayed saturated red, blue and white fabrics lit by
CrispWhite next to the same fabrics lit by halogen and CDM sources.
Overwhelmingly, attendees preferred CrispWhite’s rendition,”
said Eric Senders, product line director at Philips Lumileds.
An independent panel of lighting professionals judges the LFI awards, which
recognize products that exemplify innovative design. The 2014 LFI award winners
were chosen from among 261 entries spanning 14 categories.
University of Michigan Researchers Develop Metal-free Phosphorescent OLED
LIGHTimes News Staff
July 17, 2014...Researchers from the University of Michigan claim to have produced a
metal-free Phosphorescent OLED. The researchers note that fluorescent LEDs can
produce light from up to 25 percent of the electrons that pass through them.
However, phosphorescent organic LEDs can potentially turn every electron into a
ray of light, but achieving this efficiency with inexpensive materials is
The researchers note that while carbon-based, or organic, semiconductors are
much cheaper than inorganic semiconductors, today's organic technologies employ
metals in the semiconductor to enable phosphorescence. According to the
researchers, these metals and their incorporation into the semiconductor
material raises the price and sometimes makes the material toxic. Now, the team
led by Jinsang Kim, a professor of materials science and engineering, has
devised bright, metal-free, phosphorescent OLEDs.
The difficulty was getting the semiconductors to produce light rather than
heat. The researcher pointed out that electrical charges in a semiconductor can
produce light in one of two ways. About one in four of the charges can cause
fluorescence, resulting in the 25 percent efficiency limit for fluorescent
LEDs. The other three in four can go towards phosphorescence, emitting slightly
lower energy light than fluorescence, the researchers said.
Organic semiconductors reportedly tend to loose about 75 percent of the
energy from electricity in producing phosphorescence. Instead of creating
light, 75 percent of the electrons generate vibrations in the surrounding
molecules, heating the material. The researchers note that while incorporating
metals can improve phosphorescent emission efficiency, going metal-free
requires a different solution.
"That's why phosphorescence from metal-free organic materials in nature is
very rare," said Min Sang Kwon, a materials science and engineering postdoc in
Kim's lab. One example, he added, is the Hope Diamond.
The researchers indicated that the phosphorescent OLEDs that they developed
can reveal the presence of water under backlight. Water reportedly causes the
polymers in the phosphorescent OLED they created to break, changing the
material's phosphorescent light (green) to fluorescent light (blue), according
to the researchers.
The team demonstrated that the stiff lattice structure of the OLED they
created helps to stifle vibrations so more energy could be released as light.
The material's crystals produced light from 55 percent of the charges. However,
according to the researchers, it is very difficult to produce high-quality
crystals consistently in manufacturing.
The researchers altered the molecules so that they would structurally bond
with a transparent polymer. The team heated and dried a solution containing the
new phosphorescent OLEDs and polymers, and the molecules assembled themselves
into a stiff matrix. This structure allowed 24 percent of the charges to
produce light. While this efficiency level is only about as good as fluorescent
light, the team is attempting to devise a complementary way to improve the
"We demonstrated that increasing the intermolecular bonding strength
could efficiently suppress the vibrational loss of the phosphorescent
light," said Kim. "This finding provides an insight into molecular
designs for achieving energy-efficient and inexpensive light-emitters, ideal
for practical devices."
The presence of water reportedly breaks up the bonds that enable the charges
to fluoresces (producing green light in this material). However, when the bonds
break, the OLED switches to the fluorescent mode, emitting blue light.
"We can see the change from phosphorescence to fluorescence, and we know
some water is there," said Kwon.
The material could lead to simple sensors for detecting water. The
researchers detailed their findings in a paper in Angewandte Chemie. The
Samsung Global Outreach grant funded the research.
Cree Leases Warehouse in Durham
SSL Design News Staff
July 17, 2014...Cree has begun leasing an 80,600 square foot warehouse located on Weck Drive
in Durham, North Carolina to store products awaiting shipment to distributors.
Mike Watson, vice president of product strategy at the Cree, reported that
because the space is being used as a warehouse, “minimal new hires
would be tied to this space specifically, potentially one-to-two jobs if
Lakewood Church Upgrades Displays with Higher Resolution Daktronics LED Video Displays
LIGHTimes News Staff
July 17, 2014...Lakewood Church in Houston, Texas got two new LED video displays from
Daktronics Inc. of Brookings, South Dakota USA. Daktronics designed,
manufactured and installed two new LED video displays to replace the existing
Daktronics displays with a higher resolution display that features 4-millimeter
line spacing in a full black package.
The church uses the displays to show inspirational images and stories during
service or reveal IMAG (Image Magnification) shots as well as live video of the
sermon and song lyrics that allow the congregation to follow along. The feed
shown on the new LED displays is the same video shown on the video displays
inside the church.
The display installation continues the nine-year relationship between
Lakewood Church and Daktronics. The installation employs the existing structure
to support the new displays that measure more than 12-feet high by 22-feet wide
that replaces the two previously installed 8-millimeter pitch displays
positioned on each side of the main service platform. Installing each display
took roughly five days between Dec. 1 and Dec. 13.
"We started tearing down one of the old displays after the final service
on Sunday and had the new display installed and operational before the Saturday
service at the end of the week," said Nathan McGillivray, Daktronics
project manager of the installation. "It was critical for Lakewood to have
zero display downtime, so we installed one display the first week and the other
display the following week. Services went off without a hitch and with full
video display functionality."
"After the displays were installed, the wardrobe and makeup departments
had to be notified of everything that was now visible on the new
high-definition displays," said Joel Henie, Daktronics sales
Henie said, "A trip to the recent installation at Saddleback Church
really helped confirm Lakewood's choice to upgrade with Daktronics."
The upgrade reportedly offers image clarity and contrast that now makes
everything much more visible to the audience, from lint on clothing to blotches
of makeup and powder.
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