SESSION 5: APPLICATIONS OF UV LEDS
EXTENDING POST-HARVEST PRODUCE SHELF LIFE AND VISUAL QUALITY USING UV LEDS.
The world fruit and vegetable market will exceed $735 billion by 2015 and has had 25% growth over fve years. Effective preservation of post-harvest produce
is a top priority in order to reduce loss and conserve resources such as water, fuel, and fertilizers. Deep Ultraviolet Light Emitting Diodes (DUV LEDs) provide
a chemical and hazardous material free solution. Using Deep UV LEDs, we have extended the shelf life of several fruits and vegetables using devices ranged
within 250nm-365nm. Results show the increase in post-harvest shelf life of strawberries was due to total UV dosage rather than power density distribution.
Exposure during one hour at 18m W/m2 results in the total dose of ~65 J/m2, which is not enough to prevent mold growth, although the peak power during
illumination in the pulse regime was rather high ( 1.8W/m2). Dosages greater than 11×103 J/m2were shown to signifcantly maintain the visual appearance of
the strawberries and prevent mold growth for a minimum of 7 days.
IGNAS GASKA, STUDENT, RPI
Mr.Ignas Gaska is currently a PhD student at Rensselaer Polytechnic Institute in Troy New York. His previous research was conducted as a
bioengineer at Sensor Electronic Technology Inc. where he worked with Deep UV LEDs in water and surface disinfection as well as post-harvest
2: 15 PM - 2: 45 PM
UV LED APPLICATIONS
This speech will give a survey about various applications in the area of 400nm to 250nm. It will show why UV LED technology has been so successful in
competing with conventional lamps and systems.
In the last 10 years UV LED technology has made tremendous progress in the area of effciency improvement, simultaneously becoming cost competitive.
Markets that were previously dominated by conventional devices are opening themselves to the possibilities brought about by breakthroughs in LED technology.
For example, in recent years, UV LED technology has become a respected player in UV Curing, with growth rates exceeding market averages. This has also been
made possible due to advancements of related materials, e.g. in the application area of UV Curing, where these materials were optimized to the monochromatic
spectrum of UV LEDs. The latest technological developments in the area of below 300nm are enabling access to water and air disinfection as well as medical
and analytical applications.
HARALD MAIWEG, GENERAL MANAGER PLANNING & STRATEGY, DEEP UV LED DIVISION, NIKKISO GIKEN CO., LTD.
Harald Maiweg has been working in the Optoelectronics industry since 1986. He received of B.Sc. in Electrical Engineering and in Business
Administration. Harald has provided leadership in different management positions with responsibilities ranging from sales, business
development, production as well as research & development in international organizations. Since 2015 Harald has worked for Nikkiso Giken Co.,
Ltd. as Global Business Development Manager for deep UV LED products.
2: 45 PM - 3: 15 PM
THE WORLD MARKET FOR UV LEDS
While visible-spectrum LEDs have penetrated into TV and mobile backlighting, auto, general lighting, signage and other markets, UV LEDs are just
beginning to replace incumbent UV sources in a diverse arrays of markets, including curing, counterfeit detection, medical, sensing, printing, bio analysis
and water/air disinfection applications. This presentation will provide data on the world market for UV-A, -B and -C LEDs for 2015 along with fve year
forecast, by application.
MARTIN SHIH, ANALYST, STRATEGIES UNLIMITED
Martin Shih is an analyst at Strategies Unlimited and is responsible for LED supply chain and market trend, especially in Taiwan and China. He
has more than a decade of experience in covering the electronics industry including semiconductor, hardware, LED and related components. Prior
to Strategies Unlimited, He worked in the research department of Canaccord Genuity and Morgan Stanley as an analyst. He received his MSc from
University of Birmingham and his B.A. from National Taiwan University.