What We Can and What We Still Cannot Do with LEDs
... In recent years, the LED makers have raised the bar on performance of their LED chips and modules. One of the biggest changes has been in lumens per dollar. In both the high-power and mid-power LED chips and modules. Cree, Osram, and Philips have been at the forefront of... Read
the editorial... (or permalink is here)
opportunities presented by the increasing rapid adoption of high brightness LEDs,
in all their forms and applications, represents nothing short of a "digital
revolution" for a previously "analog" world. LEDs are having a
substantial disruptive effect on a number of established technologies, and where
there is disruption, there is an intense need for information.
LIGHTimes Online is here to serve the information needs of the LED industry
supply chain, as well as integrators and non-architectural application solution
providers with technology, product and market news updates for these rapidly evolving
devices. Our readership also includes LED packagers, technology enablers and service
companies seeking the the answers to how best to meet their customers' needs.
architectural lighting and applications news of interest specifically to lighting
designers, specifiers, and architectural lighting decision makers, along with
luminaire designers, lighting system integrators and lighting subsystem developers,
please visit our sister publication, Solid
State Lighting Design.
is booming and the 2011/2012 Summit Series is coming back to keep the message
Launched in 2008, the SSL
Summit will bring the quality story to New York City in October 2011, and
then back to LA in March 2012. At every one of the Summit events, the feedback
remains consistent: Just what we need, do it again soon. The Summit brings together
lighting decision makers with industry thought leaders, pioneers, and innovators
from the across the solid state lighting eco-system.
Continuing the tradition, 2011/2012 will continue
to be all about quality, quality, quality.Showcase
participants and sponsors are vetted to separate the wheat from the chaff
(have your IES LM-79 test reports ready!). Last year's event in NYC included
representatives of over 100 million square feet of developed property, and the
one thing we don't want to leave out for 2011 is you! Look into the series information
at www.SSLsummit.com for the details.
Sponsorships are available for the full series.
Excelitas Technologies® Unveils New OmniCure® AC8 Series UV LED Curing Solutions LIGHTimes News Staff
September 18, 2014...Excelitas Technologies Corp. launched its new OmniCure® AC8 Series UV LED
Curing Systems. According to the company, this latest addition to the AC Series
of UV LED Curing solutions features enhanced process control, superior optical
uniformity, and ease of integration. The systems support the curing of inks,
adhesives and coatings. The AC8 series allows multiple LED heads to be adjoined
to create a larger curing area. The company says that the ability to adjoin the
LED heads increase the system’s flexibility without compromising output
Excelitas says that it specifically designed these new high power,
air-cooled UV curing systems with small form factors for applications in
industrial, medical, and electronics manufacturing including print, conformal
coatings, touch panel/display, and solar panels.
The OmniCure AC8150/AC8150P, AC8225/AC8225P, and AC83000 systems have custom
front-end optics to deliver uniform, high powered, high peak irradiance at
different working distances. According to the company, the AC8 Series employs a
patented process to control individual UV LED module outputs and ensure
uniformity over the curing area. Precise control of the UV irradiance level
ensures consistent and reliable irradiance with the correct amount of UV light
provided with every exposure. The company asserts that the air-cooled design
with a small form factor enables system upgrades with minimal disruption and
seamless integration into new or existing production lines.
“In keeping with our commitment to deliver innovative UV curing
solutions, we are excited to offer the new OmniCure AC8 Series,”
said Oliver Scheuss, vice president, Solid State Lighting and UV/Microscopy for
Excelitas Technologies. “Excelitas strives to develop products to
help customers be more productive and cost efficient. The OmniCure AC8 Series
helps do just that by increasing throughput for a wide range of applications in
the curing of inks, adhesive and coatings.”
The UV curing solutions in the OmniCure® product family will be showcased at
The Assembly Show in Rosemount, IL at the Excelitas booth #1424 from October
28-30, 2014; MD&M in Minneapolis, MN booth #641 from October 29-30, 2014;
and IWCS in Providence, RI, booth #230 from November 10-11, 2014.
Cree Files Patent Infringement Lawsuits Against Havatek and Kingbright LIGHTimes News Staff
September 17, 2014...Durham, North Carolina-based Cree Inc. has filed patent infringement
lawsuits in the United States District Court for the Western District of
Wisconsin. The lawsuits aim to prevent Harvatek Corporation and Kingbright
Corporation from allegedly infringing Cree’s patents. Among other things,
these patents protect Cree’s LED component portfolio, including
Cree’s white light LEDs.
The Cree patents included in the lawsuits are: U.S. patent # 6,600,175,
and U.S. Patent # 8,659,034,
which are all titled "Solid state white light emitter and display using same".
The lawsuits also include Cree's U.S. Patent # 7,910,938
and # 8,766,298,
which are both titled, "Encapsulant profile for light emitting diodes". The
sixth Cree patent included in the lawsuits is U.S. patent # 8,362,605
titled, "Apparatus and method for use in mounting electronic elements".
“Cree continues to invest significant resources in developing
industry-leading technologies, and it’s paramount that we protect the
investment of our current licensees, shareholders and customers,”
said Brad Kohn, Cree general counsel.
Osram Presents First OLED Application for Car Interiors LIGHTimes News Staff
September 16, 2014...Osram has launched an OLED-based reading lamp for car interiors, reportedly
the first OLED product ever for car interiors. The OLED Reading Light from
Osram with matt aluminum housing provides a warm and uniform light. "With
the launch of the Osram OLED Reading Light in the fall we are once again
providing evidence of our technological leadership and powers of innovation in
the automotive lighting sector," said Hans-Joachim Schwabe, CEO of the
Osram Specialty Lighting Business Unit.
Osram notes that an OLED’s homogeneous light neither casts shadows nor
dazzles (blinds a person temporarily), making OLED technology ideal for
applications requiring eye focus for a long time. The OLED’s color
temperature of 3300 kelvin is very warm, and it has continuously variable
brightness. According to Osram, the OLED Reading Light has been optimized for
use in a car and can be recharged via a USB cable. An indicator at the USB port
shows the status of the battery charge. A clip allows it to be easily attached
to the sun visor for example.
The OLED reading light comes with a five-year guarantee and will be
available from fall 2014 in a limited edition at www.shopyourlight.com, among
Natural Light at Offices Improves Sleep Quality of Workers at Night LIGHTimes News Staff
September 16, 2014...A new study from the University of Illinois at Urbana-Champaign and
Northwester Medicine found that office workers with more sunlight exposure at
the office had longer sleep duration, better sleep quality. Additionally, they
had higher levels of physical activity and an overall better quality of life in
terms of vitality and health compared to office workers with less natural light
exposure in the workplace.
Employees with windows in their offices received 173 percent more white
light exposure during work hours. They reported sleeping an average of 46
minutes more per night than employees who were not exposed to natural light at
the office. Workers in offices with windows also tended to report more physical
activity than those without windows.
In the study, workers without windows reported poorer scores on quality of
life measures that relate to vitality and physical problems in addition to
poorer outcomes in terms of overall sleep quality and sleep disturbances. The
study was detailed in the Journal of Clinical Sleep Medicine in June.
“There is increasing evidence that exposure to light, during the
day --particularly in the morning -- is beneficial to your health via its
effects on mood, alertness and metabolism,” said the study’s
lead author, Phyllis Zee, M.D., a Northwestern Medicine neurologist and sleep
specialist. “Workers are a group at risk because they are typically
indoors often without access to natural or even artificial bright light for the
entire day. The study results confirm that light [exposure] during the natural
daylight hours has powerful effects on health.”
“Architects need to be aware of the importance of natural light
not only in terms of their potential energy savings but also in terms of
affecting occupants’ health,” said co-lead author Mohamed
Boubekri, an associate professor of architecture at the University of Illinois
Boubekri noted that one simple design solution could help make sure that
workstations are within 20 to 25 feet of the peripheral walls containing
windows. ”Daylight from side windows almost vanishes after 20 to 25
feet from the windows,” he said.
The study included 49 day-shift office workers; 27 of which were in
windowless workplaces, and 22 were in workplaces with windows. Study
participants filled out form reporting on their quality of life and sleep
quality. The researchers evaluated the forms with the Pittsburgh Sleep Quality
Index (PSQI). Actigraphy measured sleep, light exposure and activity in a
representative subset of 21 participants including 10 in windowless workplaces
and 11 in workplaces with windows.
Actigraphy is a device worn on the wrist that measures light exposure as
well as activity and sleep and keeps a record of it. The researchers used the
motion to determine activity levels while awake and to calculate sleep time.
The researchers also determined luminance as a measure of light exposure during
Massive Attack Tours with XL Video LED Displays LIGHTimes News Staff
September 16, 2014...XL Video supplied LED screens and d3 media servers for Massive
Attack’s recent festival tour. The tour featured a video concept
co-designed by UVA and Icarus Wilson-Wright. Massive Attack is well known for
their use of video to reinforce their music’s message and immerse
audience members in its visceral live shows.
For over a decade, the band has been developing their own distinctive
text-based style of video content since they first incorporated it into their
show. The group can translate the text into the local language/s for each
Phil Mercer and Steve Ackein managed the project. The initial brief for the
tour’s video design specified that it should be flexible and have high
impact for a mix of festivals and own show headliners. The band wanted the
screen to be semi-transparent and through-lit from behind.
Wilson Wright explained that they decided to use XL’s new Radiant
MC-7T black-face 7mm resolution for its good resolution, light weight and the
fact that it is very dark when off.
The display stays lurking in the shadows. Each screen measures 4.2 meters
wide by 1.2 meters high, offering 560 x 160 pixels. The XL designed the system
to be configured in a standard 6-screen format on two levels and be expandable
up to nine screens on three levels. The screens were designed to independently
rotate louvre style to produce different architecture and shapes behind the
band during the performance. The media server controlled the rotation.
XL devised a series of stepper motors that powered an axle-based system. The
d3 media server controlled the motors which allowed 180 degrees of travel.
Two pins attached each axle to the screen support structures, and two
different sets of support structures were toured for maximum flexibility
depending on the venue or gig. One support structure was based on a scissor
mechanism and an aluminum option which utilized motors to lift the louvers.
Wilson-Wright ran the d3 server from FOH. They took in timecode there and
sent the signal down a DVI fibre link to the screen processors onstage, and via
a MOXA box, data was distributed to the screens. The show’s video content
was newly commissioned by UVA, with Wilson-Wright looking after re-editing some
of the ‘heritage’ items from the band’s extensive digital
archive and also creating some new material. All the time he worked in close
collaboration with Lighting Designer Tim Oliver to optimize the different live
show looks with lighting and the screen louvers as they moved into different
UVA created a custom grid software module for the d3, upon which text and
graphics can be placed and then scaled and sized to maintain complete pixel
integrity without aliasing or blurring. Massive Attack’s show video
allows multi-lingual text translations including Cyrillic and Chinese
characters. With bi and tri-lingual shows the norm, current local and world
events and issues can be fully integrated and communicated to the audience in
the performance’s context.
Leti and Luciom Focus on High-data-rate LiFi Applications LIGHTimes News Staff
September 11, 2014...Luciom, which develops visible-light communication using LEDs, and CEA-Leti
of Grenoble, France have launched a project to develop high-data-rate LiFi
transceivers. In mid-2015, Luciom plans to begin offering the first
high-data-rate bidirectional light-fidelity (LiFi) products that can work with
different LED lighting sources, and can work on various mobile devices.
Luciom notes that Visible Light Communications (VLC) has gained significant
momentum in recent years, primarily because LEDs are expected to become
predominant. Luciom goes so far as to suggest that eventually LiFi will be more
efficient and economical compared to wireless RF communications do to rapid
market penetration and reduced production costs.
LEDs can be modulated at very high frequencies. High-speed oscillations are
invisible to humans allow very high data rates of information transmission.
Earlier in 2014, Leti demonstrated a new prototype for wireless high-data-rate
Li-Fi transmission that uses LED engines in commercial lighting. Leti says that
the technology achieves throughputs of up to 10Mb/s at a range of three meters.
At this data rate, the company says it would be suitable for HD video streaming
or Internet browsing, using direct or even indirect LED lighting with a
luminous flux of under 1,000 lumens. Luciom says that the technology will be
adapted to meet the needs its transceivers.
Luciom claims that its technology allows any LED lighting source to act as a
high-speed data transmitter that is both secure and environmentally -friendly.
The technology, which uses integrated circuits and transceivers, turns LED
light sources into positioning beacons, which transmit signals that indicate
the location of the specific luminaire. The technology so far only allows one
way communication from the light source to the
Smartphones and tablets can become LiFi receivers using their camera as a
receiver. When combined with WiFi or Bluetooth in a 3.5mm audio jack Bluetooth
dongle, a LiFi application launched from a smartphone can transmit to a server.
The companies hope to go a step further than what can be done now to offer a
receiver and transmitter (transceiver) that can be connected to a smartphone
via an audio dongle.
Luciom says its technology can be combined with the use of gyro-sensors in
smartphones and tablets to predict movement between two LiFi beacons and
calculate a very accurate position of the user.
Indoors, when GPS technology does not work, communication between phones and
smart indoor LED lighting can be used, Locium says that the localization
application can provide additional personalized services or information to
customers as well as information to the infrastructure manager.
The company is targeting high-data-rate video transfer via LiFi in future
products and apps. The project between Leti and Luciom builds on their previous
collaboration in which Leti developed an optical over-the-air data link for the
company that allows the transmission of true HD video from a lamp to a handheld
"Our indoor geo-localization could guide shoppers through the maze of
large shopping malls to the stores they are seeking, and LED lighting in
museums could be used to guide visitors through an enriched tour of the
displays and exhibits," said Michel Germe, CEO of Luciom. "Working
again with Leti, we will be able to bring new, bidirectional transceivers that
enable these applications to market in 2015."
"Luciom was one of the first companies to see that LEDs and LiFi can
offer a powerful, secure and highly energy-efficient communications alternative
to WiFi," said Leti CEO Laurent Malier. "With Leti's first proof of
concept developed earlier this year and its expertise in RF communications, we
expect data-transmission rates in excess of 100Mb/s with traditional lighting
based on LED lamps."
Samsung Creating New Ultra HD TV with 300 LEDs
September 9, 2014...Samsung Electronics is creating a new Ultra HD TV equipped with a 300 LED direct-type LED backlit unit, according to a Digitimes article, which cited supply chain sources. The new TV is reportedly expected to help compete against OLED TVs in the high-end TV market. Samsung hopes the TV will help meet expected demand for Ultra HD TVs in 2015.The company plans to enhance the resolution and color quality of the TV using increased LEDs, an improved color filter, and local dimming technology.
Daktronics to Provide New HD Video Displays at the Palace of Auburn Hills LIGHTimes News Staff
September 9, 2014...The Palace of Auburn Hills, home of the Detroit Pistons, has gotten a new
high definition centerhung display system as well as ribbon and auxiliary
displays from Daktronics. Daktronics of Brookings, South Dakota, has partnered
with Palace Sports & Entertainment to provide the new display systems and
repurposed audio system for the 21,231-seat, multi-purpose arena in Auburn
Hills, Michigan. The display installation is the fourth stage of the facility's
three-year capital improvement plan.
"As a long-term partner of the Detroit Pistons and The Palace of Auburn
Hills, Daktronics is proud to be part of the vision of excellence and very
excited to be supplying the new HD video screens," said national sales
manager Will Ellerbruch."The Daktronics screens will supply a crystal clear
HD view of the game and enhance the entire game-day experience for Pistons
fans. Our control system will help immerse the fans with eye-popping video
along with the two 360-degree LED ribbon boards that will surround the fans
with unprecedented entertainment. We are very much looking forward to fall and
another great year of basketball."
The 56,000 pound custom-designed sound and video display system is scheduled
for completion by early November for the 2014-15 NBA season. The centerhung
features four convex high definition video displays along with two lower
sideline facing displays.
The rectangular centerhung system boasts two displays facing the sidelines
that each measure 24 feet high by 42 feet wide and feature 6 millimeter line
spacing. They provide 1080p HD imagery. Each of the two displays facing the
baseline measure 16 feet high by 27.5 feet wide and features 6 millimeter line
spacing to provide 720p HD imagery. The centerhung installation combines for
2,896 square feet of active display area.
Two additional video displays will be angled out from the bottom of the
centerhung setup to appeal to fans, players and coaches that are close to the
action and courtside. Each display will have 6 millimeter line spacing and will
measure about 8.5 feet high by 16 feet wide. These two displays will supplement
content shown from the main video displays.
"We are pleased to enhance the visual experience of sporting and
entertainment events at The Palace with the installation of a new high
definition video system," said Dennis Mannion, CEO of Palace Sports &
Entertainment. "Multi-million dollar renovations and technological upgrades
at The Palace support the vision of our owner Tom Gores and his commitment to
providing our fans with one of the most innovative, technologically advanced
facilities in the country."
The existing audio system will be repurposed and integrated with the video
and scoring system at The Palace. This system provides full-range sound
reproduction and delivers clear speech.
The installation also includes a fascia display measuring about 2.5 feet
high by 984 feet wide. Two end fascia displays measure about 6 feet high by 80
feet, and two ribbon displays measure about 3 feet high by 535 feet wide.
Thirty vomitory displays measuring 3.5 feet high by 4.5 feet wide are
throughout The Palace. All of the displays have 15 millimeter line spacing and
can be used to deliver statistics, additional game information, animations, and
The company will also include its Show Control system, a production
solution, which combines display control software, video processing, data
integration and playback hardware. The Show Control System can control all
video displays in the arena from a centralized control room.
Daktronics will also supply two Lapeer Road Palace marquees with 16
millimeter line spacing, each about 18.5 feet high by 25.5 feet wide. The
displays will include multiple levels of protection from the outdoor
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