LEDs for displays

17 August 2011 Opto-Electronics

OSRAM Opto Semiconductors has expanded its TopLED Black series beyond the previously available red and yellow variants. The small LEDs in black packages are now also available in blue, green and orange with a 60° or 30° beam angle.

The LEDs are particularly suitable for monochromatic and multicolour displays, such as those in electronic road signs, travel information displays, parking control systems and price information pillars at petrol stations. The most suitable beam angle for each of these applications depends on the distance from the viewer and on local conditions. On straight roads, the LEDs with a 30° beam angle are ideal, whereas the versions with a 60° beam angle are better for the curves on entrances to and exits from highways, for petrol stations and for bus destination displays.

The completely black package of the TopLED Black series reduces reflections considerably. The LEDs also offer high contrast so that displays have good legibility in all lighting conditions. The 30° version of the green LED offers high luminance of 7 cd at an operating current of 20 mA.

As SMT components, the LEDs are suitable for automatic handling. The solder legs compatible with TopLED and Power-TopLED provide flexibility since displays can be made with different luminances and beam angles on one and the same circuit board.

For more information contact Ryan Hunt, OSRAM Opto Semiconductors, +27 (0)11 472 5264, [email protected], www.osram.co.za

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