9 January 2020
Osram boosts Ostar Projection Power LED family beyond 3000 ANSI lumens, rivaling high-pressure discharge lamps
As projectors have become more and more popular in home entertainment systems, so have the expectations of users. In addition to ever-higher resolution, the focus is also on richer colors, contrasts and higher brightness. Osram Opto Semiconductors GmbH of Regensburg, Germany says that, with the Ostar Projection Power family, it has succeeded for the first time in achieving projector brightness levels beyond the 3000 ANSI lumen barrier using LEDs instead of conventional lamps, making them accessible to a broad market.
Depending on the ambient light conditions and the distance to the projection surface, requirements differ for the light source. Osram says that, with 12 new products, it can now offer three different power classes for RGB solutions in deep blue (440nm), blue (456nm), converted green (520nm) and amber (614nm) wavelengths. In the lowest power class, two chips of the same color per component provide projector brightness of up to 1500 ANSI lm. In the mid-power class, four chips of the same color per component can achieve 2500 ANSI lm. In the highest-power class, six chips of the same color per LED can achieve more than 3000 ANSI lm. As a result, products from the Ostar Projection Power family present an alternative to the high-pressure discharge lamps previously used in projectors above 2000 ANSI lm.
Picture: An Osram Ostar Projection Power LED, which can achieve brightness values beyond 3000 ANSI lm.
Osram says that this leap in performance was achieved by, among other things, improved chip and package technology. The developers have fundamentally modified the individual LED chips, allowing them to be electrically connected in a series on the copper board. The system designer benefits not only from a significantly lower operating current (with the same power consumption) and reduced complexity of the LED driver but also from the much simpler contacting of the component, says the firm. In addition, direct coupling of the LEDs to a heat sink is possible, without additional isolation costs.
The mechanical design remains largely unchanged compared to previous products, enabling fast and uncomplicated exchange of the products in existing projector systems.
“With products from the Osram Ostar Projection Power family, we have successfully crossed the 3000 ANSI lumens barrier using LED technology,” says Wolfgang Schnabel, product manager in the Visualization & Laser division. “Our customers can easily integrate the new components in their desired power class into their system design and replace conventional lamps with state-of-the-art LED systems,” he adds.