Miniature LED makes pocket projectors possible

9 March 2005 Opto-Electronics

Although smaller than a pack of cigarettes, Osram's latest high-performance light-emitting diode, called Ostar, is 50 times brighter than comparable predecessor models. Because of its small size (3 x 1 cm) and high brightness (120 lumens), the new LED is ideally suited for use in mini projectors.

The LED itself takes up only a fraction of the device's surface area, generating an extremely bright and uniform light for its size. As a result, the manufacturer says that the Ostar could play a decisive role in the future development of projectors, ranging from applications for digital cameras and PCs to pocket-sized mini projectors.

Unlike conventional projection systems, a miniature projector equipped with the Ostar module would not require a warm-up phase or a fan, making the unit exceptionally quiet. The extremely small RGB (red-green-blue) light source has been designed to ensure a very even distribution of light. The ready-to-install mini-LED consists of four thin-film chips (one red, one blue and two green), a ceramic carrier for connecting the system to the heat sink, and a number of elements for protecting against over-voltage.

Due to its special beam characteristics, Ostar is also suitable for use in other areas, such as medicine or the automotive sector. In cars, the bright LEDs would be especially useful in headlights and head-up displays that project speedometer data and other information onto windshields.

For more information contact Mandla Mpangase, Siemens Southern Africa, +27 (0)11 652 2000.

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