Osram Opto Semiconductors GmbH of Regensburg, Germany says that, as a more efficient successor to the P3W LED (with more output from a smaller package), its new Osram Ostar Projection Power LED light source enables users to equip even mainstream projectors rated at more than 2500lm exclusively with LED lighting for the first time. As a monochrome LED, it is available in the colors red (the LE A P3W 01), converted green (the LE CG P3A 01) and blue (the LE B P3W 01).
The external dimensions of the new Ostar Projection Power have been reduced to 27mm x 16mm x 2.1mm and are now the same as those of the compact sister LEDs (the P1W and P2W). The firm’s latest UX:3 and thin-film chip technologies and production methods are also used for the new P3W 01. Pulsed at a current of 36A (at 25°C), typical brightness is 4500lm (red), 11,000lm (green) and 33W (blue). The firm reckons that it has not been possible before to generate such high luminous flux and radiant intensity from such a small surface area. Typical electrical output is 121W (red), 128W (green) and 128W (blue).
LED projectors now 100 times brighter than in 2005
Osram Opto says that, due to the new LED, standard office projectors with luminous intensities of 2500-3500lm can now have LEDs as the sole light source for the first time. “In the past ten years the brightness of projectors equipped solely with LEDs has been increased by a factor of 100,” says Wolfgang Schnabel of Product Marketing LED at Osram Opto. “It is the result of years of research and development,” he adds. “Our customers have made huge progress in system development, and we have in chips and packages.”
High brightness from small surface
One red, one green and one blue Ostar Projection Power can be used as the light sources in a projector. The monochrome LEDs each consist of six chips with an area of 2mm2 operated in parallel. Osram developers are using a new type of connection between the chip and the heat-sink that results in a small thermal resistance Rth of <0.5K/W. Heat can therefore be dissipated better and the system can be operated up to its maximum output limit. The heat-sinks can also be made smaller, which in turn leads to a more compact design for the projectors.
The Ostar Projection Power LED is already available on request for first customer projects. Volume start-up is planned for the end of January.
