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November 26, 2010

High Power LEDs enabling better hydroponics and smartphones and projectors

OSRAM’S UX:3 Chip in a new package is 50 percent brighter than the precursor package.

High power LED applications like automotive headlights, general lighting, or pocket projectors demand ever increasing brightness. High driving currents yield high brightness, but as the current rises, the efficiency of the LED declines. Hence high efficiency at high currents is the key to brighter high power LEDs. OSRAM Opto Semiconductors’ new generation of high power chips features higher efficiency which is achieved by burying the n-type contact inside the chip. Moreover, the efficiency decline at high currents is overcome by reducing Auger recombination.

At 150 lux, the LED with the UX:3 chip is 50 lux brighter than its predecessor. As a result, high-quality images can be taken even with very flat cell phones or smartphones. The LED flash can illuminate a wider area and provides a more uniform light distribution. As a result, it is more efficient at higher currents than previous LEDs. Oslux is available with two different lens types, which are already integrated and matched to the beam characteristics of the UX:3 chip. This ensures smooth, rectangular illumination of the subject. The light distribution depends on the lens used. At a distance of one meter, the LED


LED horticultural lighting is enabled by OSRAM Opto Semiconductors and will reduce energy usage by 60% versus High Pressure Sodium (HPS)

High Pressure Sodium (HPS) lamps are widely used in horticulture to create the right environment for plants to grow in the dark season. A typical one hectare greenhouse using HPS lamps will consume around 10,000 Mega Watt Hour of electricity per year. “Based on some researches, we found that only 7% of the light created by HPS lamps is absorbed by the plants. Much of the energy is wasted by inefficiencies. By converting into LED lighting, energy saving can be achieved immediately. In the case of lettuce grown in a greenhouse, energy consumption can even be reduced by 20% to 30%. Certain wavelengths and color temperature can make the fruit amount, weight or biomass grow faster based on the recent studies. By using more predefined light for example in tomato growing the joules spent per kilogram of vegetables is reduced. With cucumbers the yield can be increased by more than 20%, the vegetable quality is improved, and the production season will be lengthened.





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