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Editorial: 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...
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Welcome to your LED Applications news channel!

The 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.

For 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.


SSL is booming and the 2011/2012 Summit Series is coming back to keep the message on quality

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.


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 other places.

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 at Urbana-Champaign.

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 the workday.

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 show.

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 positions.

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 receiver.

"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 sponsor messages.

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 elements.

Baku Olympic Stadium to Get New LED Super-System from Daktronics
LIGHTimes News Staff

September 4, 2014...Daktronics of Brookings, South Dakota, was asked to provide Baku Olympic Stadium in Baku, Azerbaijan, with a new LED super-system. Installation of the system that features two HD video displays will begin around September 2014. The system will also include new LED ribbon and pitch perimeter displays. By 2015, Baku Olympic Stadium is expected to be completed in time to host the inaugural European Olympic Games including track and field events and the opening and closing ceremonies. The facility will also be the new home of the Azerbaijan national soccer team. Tekfen Construction is the primary contractor on the project and Anel Group is the electromechanical subcontractor.

"Daktronics provided many key elements that led to their selection for this video display project," said Javid Najafov, senior engineer for regional and social projects delivery department of SOCAR, the State Oil Company of Azerbaijan Republic, the company funding the project. "Simply put, the quality they provide, the solid reference list built from their experience in the industry, and the responsibility and responsiveness of the company from a partnership perspective positioned them to succeed with this installation."

Two new displays will be positioned with one at each end of the field. Each display will measure 10.97 meters high by 19.75 meters and feature a 15HD pixel layout with 720 pixels high by 1296 pixels wide. These displays can provide full screen live video and instant replays, or they can be divided into separate windows to show additional statistics, animations, graphics and sponsor messages.

One ribbon display will be installed on the fascia of the seating area that will feature 20 line spacing. The ribbon display will measure 1.1 meters high by 691.65 meters wide. One pitch perimeter display will be installed around the edge of the field featuring 10 millimeter line spacing. The pitch perimeter display will measure 0.73 meters high by 307 meters wide.

These additional displays can supplement the content shown on the main video displays and provide additional space to highlight event sponsors, show crowd prompts and graphics, and inform fans about relevant game information. The displays can be used individually or synchronized all together. They are commonly used to highlight an exciting moment during the event or to provide premium exposure for sponsors.

"We're extremely honored to be selected for this monumental installation for Baku Olympic Stadium," said Ewan Prentice, Daktronics regional sales. "These displays will provide the stadium with extra game-day excitement and amplify the action that's taking place on the field. We're excited to see everything installed and turned on for their first event."

ALA Treatment and Blue-violet LED Cure MRSA-Infected Skin Ulcer
LIGHTimes News Staff

September 4, 2014...A group of researchers from Osaka City University reported the successful treatment of a skin ulcer with methicillin-resistant staphylococcus aureus (MRSA). The researchers treated the skin ulcer with the systemic administration of natural amino acid (5-aminolevulinic acid: ALA) and a photodynamic therapy (PDT) using LED light, according to TechOn Nikkei.

The researchers point out that the new treatment method does not produce resistant bacteria. For this reason, the researchers expect it could be used as a new treatment for bacterial infections. The group along with SBI Pharmaceuticals Co Ltd are planning to conduct a preclinical test targeted at skin ulcers infected with MRSA.

Bacteria has emerged in recent years that is resistant to antibacterial drugs, and MRSA is one example of resistant bacteria. Skin ulcers infected with MRSA are more difficult to cure. In some cases, MRSA prevents a wound from healing and causes death. The researcher point out that even MRSA resistant to vancomycin, which is effective in the treatment of MRSA, has already emerged. For these types of infections, treatments are needed that do not rely on anti bacterial drugs

In a study, the research group formed skin ulcers infected with MRSA on the back of a mouse. Then, they systemically administered ALA that makes photosensitive and applied PDT using a blue-violet LED light source with a wavelength of 410nm to them. PDT generates reactive oxygen when light with a specific wavelength is applied. After concentrating photo-sensitive substances on the target tissues, and applying the specific wavelength of light, PDT annihilates target cells (bacteria). It does not develop resistant bacteria.

From the treatment MRSA was sterilized, and the skin ulcers were able to heal in a way that was equivalent to that of ulcers that are not infected with MRSA. The group proved that PDT using ALA can be a new method for the treatment of MRSA infections. The results of the research was published on the US online journal PLOS ONE.

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