Multifunctional devices such as tablets, ultrabooks and even smartphones need high brightness levels and good color rendering without draining the batteries too quickly. The new MicroSideled 3806 from Osram Opto Semiconductors is designed specifically to meet these requirements. It is extremely efficient in white and also in blue, offers consistent brightness throughout its lifetime of 15,000 hours, and can withstand high temperature and high current. At the end of its rated life, it does not simply go dark. Rather, half of the light emitting diodes still provide 70 percent of their initial brightness (L70/B50).
The MicroSideled 3806 ensures stable light levels on the display. The brightness of this light emitting diode, which is available in white and blue, remains consistent throughout its lifetime, and the color rendering is excellent. It also offers impressive battery-saving efficiency, making these semiconductor light sources ideal for portable devices such as tablets and smartphones.
The white version is a standard LED with chip and converter, achieving a high efficiency of 150 lumens/watt (lm/W).
The blue MicroSideled offers an impressive efficiency of 55 percent, measured as the external quantum efficiency (EQE), i.e., 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 in the backlight, which is illuminated by the blue LEDs. This, in turn, leads to an extremely narrow-band emission spectrum that accurately matches 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 greater than with mainstream white LED solutions. Coverage of the color space is also 33 percent better.
Both versions are extremely compact, measuring only 3.8 x 1.0 x 0.6 mm (0.15 x 0.03 x 0.2 inches) in length, width, and height, and have good thermal conductivity with a thermal resistance of 66 (K/W).
OSRAM Opto Semiconductors