15,000 hours of constant output for portable device displays
The white version is a classic LED with chip and converter, achieving a high efficiency of 150 lumen/watt (lm/W). For white in particular Osram offers particularly fine binning to ensure a uniform color over the entire backlit surface.
The efficiency of the blue MicroSideled is 55 percent, measured as the external quantum efficiency (EQE), in other words the ratio of the electrical power used to the emitted optical power. This LED is designed for special display technology that uses quantum dots (special nano particles) as conversion material. This conversion technology features a thin sheet with quantum dots (the quantum dot sheet) in the backlighting. This sheet is illuminated by the blue LEDs. This in turn leads to an extremely narrow-band emission spectrum which accurately hits the color filters of the backlighting unit. Light losses are therefore kept to a minimum and the colors are more vibrant. System efficiency with this conversion technology is 10 to 15 percent better than with classic white LED solutions. Coverage of the color space is also 33 percent better than with classic white LED systems.
Both versions are compact, measuring only 3.8 x 1.0 x 0.6 mm (length x width x height), and have good thermal conductivity with a thermal resistance of 66 K/W.
For more information visit www.osram-os.com
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