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Philips Lumileds Announces Easy-to-Implement Luxeon K
LIGHTimes News Staff
January 31, 2012...Philips Lumileds introduced another of its Luxeon LED arrays, the Luxeon K its illumination grade array. The company claims that the array, which is designed for downlights and retrofit bulbs, can allow designers to take a product to market more quickly and at a lower price .The Luxeon K comes in configurations with between 4 and 24 LEDs producing between 620 and 4455 lumens respectively at 700mA.
“Luxeon K extends our portfolio of illumination grade LEDs engineered to optimize end-user satisfaction of specific applications,” said Rahul Bammi, VP Marketing at Philips Lumileds. “For downlights and retrofit bulbs, Luxeon K provides a unique approach that delivers the highest, most consistent quality of light in an easy- to-implement array. Our hot testing and specification at 85°C, and freedom from color, flux, and Vf binning, makes Luxeon K the simplest of LEDs to specify and use.”
MicroOLED Introduces Highest Pixel Density OLED Microdisplay
LIGHTimes News Staff
January 31, 2012...
MicroOLED, a maker of microdisplays for near-to-eye applications, introduced a new 5.4 million pixel density 0.61 inch diagonal, low power consumption OLED microdisplay on silicon. The microdisplay is for applications demanding high picture quality, such as professional camera and camcorder equipment, night vision systems and head-mounted displays used in surgery.
The microdisplay has a sub-pixel pitch of 4.7 micrometres by 4.7 micrometres. The company says that it is the highest pixel density OLED microdisplay available today. The company says that by doubling the pixel density of comparable products, MicroOLED has eliminated the gap between pixels. The company notes that with no black matrix present, the resulting image resolution is of the highest quality.
The display has high contrast (maximum 100,000:1) and high uniformity (96 per cent). Depending on how one drives the OLED microdisplay, it can perform using as low as 0.2W, half the power consumption of other products in its category even when the fully digital video input is embedded.
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LG Display to Showcase LED Backlit Window Display at ISE 2012
LIGHTimes News Staff
January 31, 2012...LG Display of Seoul Korea, announced that it will showcase a line-up of next generation public display products including an innovative 26-inch window display. Public display is one of the most rapidly growing, high growth potential, and exciting markets in display technology today. According to DisplaySearch, the public display market is expected to grow over 30%, from 2.9 million units in 2011 to 3.8 million units in 2012, with an annual growth rate of 20%, marking a total volume of 7.7 million unit sales by 2015.
“Unlike the TV and IT display markets which have reached maturity and are showing signs of slowing down, the public display market is a rapidly growing market full of potential,” said Mr. Joon Jun, Vice President and Head of LG Display’s Public Display Division. “We plan to take an aggressive approach as a leading pioneer in the market by introducing our cutting edge technologies at ISE 2012.”
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Philips Lumileds Introduces Luxeon M LED for Outdoor and Industrial LED Lighting Applications
LIGHTimes News Staff
January 26, 2012...
The company says that each part is hot tested and specified at 85C and delivers what the company calls Freedom From Binning. Philips Lumileds plans to make the Luxeon M broadly available in the second quarter of this year.
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Philips Lumileds has introduced Luxeon M, an illumination grade LED. The The company says that the Luxeon M was designed specifically to simplify solution design, reduce costs, and provide the optic control and quality of light required by high-bay and low bay lighting solutions and outdoor lighting applications. The Luxeon M will come in 3000K, 4000K, and 5700K versions each with specified minimum CRI of 70.
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What is the DOE's role in technology development for LED lighting?
Guest Commentary: James Brodrick, SSL Program Manager, US Dept of Energy
January 26, 2012...We recently asked Dr. James Brodrick, SSL Program Manager for the US Department of Energy, what the sustaining role of the DOE is in the basic science and technologies underlying the LED and solid state lighting industries. Jim has been a powerful voice championing the healthy technology and market development of LED lighting, and was kind enough to share his views in some detail.
Researchers have made great progress in the efficacy of LED packages, to the point where many people are asking if they are "good enough". Why shouldn't DOE just let industry take over now and move on to other things? The answer in part depends on how much energy savings is "needed" from SSL and in part on one's assumptions about what industry will do on their own going forward.
Max Possible... As to the first question, DOE has taken the position that we should maximize the potential energy savings. The goal should be to wring all the efficiency we reasonably can out of the technology, and not be satisfied with being able to compete with some fraction of incumbent technologies. At the present time, we're perhaps a bit more than half way to what DOE believes is the ultimate capability; why should we stop now?
State of Today... The second question is a lot more complicated. Do we believe industry will continue to drive the bandwagon on their own? There is some evidence that there is competition for the most efficacious products in what have become the standard platforms: GaN pc-LEDs on sapphire or SiC. But recent efficacy gains have been realized through either lowering the current density (sidestepping droop) or by using white pc-LEDs in concert with monochromatic reds (sidestepping phosphor spectral limitations and reducing Stokes loss). Both are excellent choices but they do have their limitations. Lowering current density either with larger LEDs or more of them tends to increase costs. Using monochromatic red LEDs results in additional complexity for drivers, especially when dimming is needed, but also to account for variable ageing rates and temperature sensitivity, both of which add cost and may reduce reliability.
Take it to the Next Level... The obvious "science" opportunity is to find a way to overcome the fundamental limitations that these work-arounds are addressing: Put most simply, dramatically reduce or eliminate current droop and find a way to realize an efficient color mixed solution to eliminate Stokes loss. There are of course other challenges, especially if one moves beyond the devices into the end products. But these challenges are presently the big ones. In fact, while practical products continue to improve, we have not seen the kind of basic breakthroughs that we would like to see in a while. The greatest progress is likely to be step-like, not incremental. Finding promising "steps" that represent real breakthroughs would seem to be a legitimate role for publically supported science work.
Just do It Sooner... Another value of supporting basic development is
the notion of acceleration of progress. There is a fairly logical argument that
says industry may prefer to avoid or delay a major change in the platform, choosing
to maximize the return on investments they have already made. It would seem
to be a difficult argument to gain support for internal research if the outcome
would be to obsolete millions of dollars of expensive equipment. More effort
and funding by industry is likely to go into specific product development with
incremental but not dramatic efficiency gains, just enough to remain competitive.
So while competition may eventually approach to some extent the ultimate capability
of LEDs, it might take a lot longer, thus delaying higher energy savings.
DOE looks to focus its resources on exploring fundamental science challenges
and pathways that may lead to the next “step” or breakthrough. We
look forward to continuing the discussion with the R&D community and industry
at the upcoming Transformations
in Lighting - 2012 DOE Solid State Lighting R&D Workshop in Atlanta,
Jan 31- Feb. 2 (on-site registration is available).
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