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2 November 2012

Osram launches Displix multi-chip LEDs for high-contrast displays in extreme outdoor conditions

Osram Opto Semiconductors GmbH of Regensburg, Germany has launched the Displix black and Displix blackprint multi-chip LEDs, for which large-format outdoor displays (e.g. at rock concerts, at sporting events or for perimeter advertising) are the key target applications. The robust high-contrast high-power LEDs can withstand high humidity levels, wide fluctuations in temperature, and even torrential rain, says the firm.

Displix black has a black package with a black reflector and Displix blackprint has a white package with black overprinting and a white reflector. Displix black offers high contrast even in direct sunlight as well as precise color rendering even after a long operating time, claims the firm. Typical light intensity at the Illuminant D65 white point (at a color temperature of 6504K) is 1450 millicandela (mcd) at an operating current of 20mA, which appears very bright in the black package. Under the same operating conditions, Displix blackprint is even more intense, at 2950mcd, with good contrast.

The 4.5mm x 4.5mm x 2.1mm package for both Displix versions contains three chips with typical wavelengths of 625nm (red), 528nm (green) and 470nm (blue). So, individual LEDs do not have to be combined into an RGB cluster. This reduces the pixel spacing and improves resolution for the same area.

“People are more and more used to seeing HD images in their homes and on HD-compatible devices, so the requirements placed on outdoor displays are changing,” says Sven Weber, marketing manager for LED Displays at Osram Opto. “The two new Displix versions enable long-life displays with high resolution, high intensity and excellent contrast to be produced for a wide variety of applications.”

Due to surface-mount technology (SMT), the LEDs can be processed at reduced cost. With a height of just 2.1mm there is enough space for further standard processes (such as silicon encapsulation) for added protection against harsh outdoor conditions. Special shading elements can also be easily fitted. Both measures extend the life of the LED, which may be more than 100,000 hours, depending on the ambient temperature. At the same time, they provide the basis for long-term stability, as evidenced by approval of the components for various harsh ambient conditions such as specialty corrosive gases, aging in direct sunlight and resistance to heavy rain.

The Displix LEDs can be seen for the first time in booth 107, hall A3, at electronica 2012 in Munich, Germany (13-16 November).

Tags: Osram Oslon


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