Chip-sized LED achieves homogeneous illumination
The Duris S2 is in the low to middle output range and offers a high typical luminous efficacy of 160 lm/W, excellent color homogeneity and color stability. The device is capable of achieving homogeneous illumination in LED products designed as replacements for fluorescent tubes.
Thanks to device’s compact footprint of 2.0 mm x 1.6 mm, the space-saving LED is ideal for linear lighting solutions. With an emission angle of 150°, this chip-size LED emits more light to the side than LEDs with classic packages. The light is therefore better distributed in linear lamps and luminaires, and hot spots (visible points of light) are reduced. This in turn enables the number of LEDs and therefore costs also to be reduced. By overdriving the LED up to 150 mA the range of applications for the new Duris S 2 can be extended to recessed ceiling luminaires and panel luminaires.
The S2 is the first Osram LED to use a new lead frame material, an epoxy molding compound (EMC). “Thanks to this material the Duris S 2 has a longer life of up to 50,000 hours”, said Tony Tam, Project Manager at Osram Opto Semiconductors and responsible for the Duris product family. This is more than that of the existing Duris products such as the sister LED Duris E 3, which has a lifetime of 35,000 hours.
Measuring 2.0 mm x 1.6 mm, the S2 is the smallest LED in the Duris family. The new product now joins the existing S5 and S8 versions. The Duris S2 is available in different correlated color temperatures: 3000, 3500, 4000 and 5000 K. From summer 2015 additional versions with color temperatures of 2700 to 6500 K will follow. The new LED is currently being subjected to extensive quality testing. The certification process based on the LM-80 standard (Energy Star) is in progress and the results are likely to be available in the winter of 2015/2016.
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