LEDs ♦ news digest
Manufacturers are seeking to “print” tetrapod quantum dots onto backplane films in liquid crystal displays (LCD) for brighter images, larger screens and a wider gamut of colours to deliver a new visual experience in image technology.
Thinner, lighter, brighter and less expensive QD-LED displays, including portable and flexible devices, will offer almost infinite contrast levels, deep black levels and high light output with no motion blur or field-of-view issues.
Stephen B. Squires, Quantum Materials Corp’s Founder and CEO says, “Tetrapod Quantum Dots ultimately allow for lower display manufacturing costs due to their superior luminescence and much lower incidence of aggregation. Far fewer quantum dots are required to achieve the same level of performance. We believe this performance advantage coupled with our continuous- flow manufacturing technology will ensure the lowest quantum dot cost.”
David C. Doderer, vice president of research and development for Quantum Materials wrote the feature article in the July/August 2013 issue of iSP Magazine entitled “Quantum Dots: The Future of Displays”. The article details Quantum Materials’ ability to reduce the cost of quantum dot creation while ensuring uniformity in quantities sufficient to meet high volume display- manufacturing needs.
Nanomarkets’ August article “Key Quantum Dots Markets” highlighted “U.S.-based Quantum Materials Corporation” and the need for “cost-effective large-scale manufacturing techniques, which will be the key to the commercialisation of cost-effective and high-performance QDs”.
Susan Eustis of Wintergreen Research stated in their 2013 report, “Quantum Dot and Quantum Dot Display (QLED) - Markets Reach $6.4 billion by 2019” that “Once manufacturers learn to integrate higher efficiency luminescent quantum dots into their products, each vendor will need to follow or dramatically lose market share. This level of change brought by quantum dot and quantum dot displays (QLED) represents a new paradigm that will create new industries, products and jobs in science and industry.”
Seoul Semi launches LEDs reaching 140 lumens/Watt
The firm’s III-nitride based AC-driven Acrich2 LED modules reach the equivalent luminance efficiency of DC LEDs
Seoul Semiconductor has announced that Acrich2 LED modules powered by AC are now achieving luminous efficacies of 140lm/W, nearly a 20 percent upgrade from previous versions.
The technology has been incorporated into lighting fixtures already being sold in major North American lighting retailers and has become the world’s best luminance efficacy AC LED module in the global solid state lighting market.
The latest product being released is 10W and can achieve 1,400 lumen in cool white and 1,250 lumen in warm white. Accordingly, it achieves the same level of luminance efficacy that DC LED module with 180lm/W LEDs would offer.
This increased efficacy saves an additional 20 percent of power compared to the older versions. In addition, new arrangements of the LEDs on the board optimise the light pattern for specialised solutions such as flush-mount ceiling lights for living rooms, kitchens and porches.
Acrich2 Module with 140 Lm/W (Left:120V, Right: 220V)
Seoul Semi says its Acrich2 is the world’s first module with an on-board IC and multi-junction technology (MJT) LED that can be directly plugged into the wall without a ballast, driver, or converter.
October 2013
www.compoundsemiconductor.net 77
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