High-power LEDs for projection

Up to 30% greater system efficiency and brightness

The wait is now over. The new generation of green OSRAM OSTAR Compact LEDs are now being used in the first miniature projectors. By simply replacing existing LEDs of the same package size you can achieve an instant increase in system efficiency and system brightness of up to 30%, depending on the design. Customers can offer projectors of the same size but with improved performance or projectors with the same performance but with reduced overall energy consumption.

More fun in computer games and better performance in the office: LED projectors equipped with the new OSRAM OSTAR Compact can illuminate diagonals of up to three meters; the result is a clear, bright and sharp image with saturated colors that everyone can appreciate.

Source: OSRAM

The new green OSRAM OSTAR Compact is what is behind this enormous 30% increase in power. These LEDs contain a blue chip in the latest ThinGaN chip technology and a green phosphor converter. It is twice as bright as the predecessor model and produces a homogenous pattern of light. Without any change in footprint (3.8 x 3.8 mm) the LED achieves a brightness of 410 lm in converted green at a wavelength of typical 550nm. Green LEDs generally have a particularly strong influence on system brightness because a higher proportion of green light than blue or red light is needed to produce white light. The ratio is approximately 60% green, 30% red and 10% blue. These proportions depend on the required color location and may therefore vary.

Fit for gaming and office
The prime target applications are miniature projectors for the growing gaming sector and projectors for office and for mobile applications in which projectors are used as add-ons. Several new OSRAM OSTAR Compact LEDs can be used to create lighting systems that can achieve the system brightness value of 2000 lm needed for office projectors. These projectors are capable of uniformly illuminating a diagonal of up to three meters. This used to be possible only with projectors equipped with conventional light sources such as high-intensity discharge lamps.

Wolfgang Schnabel, who is responsible for the OSRAM OSTAR Compact at OSRAM Opto Semiconductors: “With our new LEDs you can immediately achieve better performance without having to change the pad design. This gives our customers greater flexibility. They can either make their projectors more energy-efficient without any loss of performance, or they can offer more powerful devices without increasing their size.” Thanks to this new high performance there is no longer any restriction on using LEDs in pico and pocket projectors. And there are even more benefits: In contrast to conventional light sources, LEDs require no maintenance. They have an average life of more than 20,000 hours, many times longer than the 4000 hours of high-intensity discharge lamps for example. Projectors with LED light sources also respond instantly to on/off switching, and they support stepless dimming. They can therefore be adjusted to ambient lighting conditions, helping save even more energy. The color space can be adjusted with a high degree of flexibility by electronically controlling the individual colors.

High performance and efficiency are no longer a factor in choosing the light source. LEDs provide both and take up very little space. After prototyping in appropriate projectors at the end of last year the first customer projects have already started worldwide.

More information on projection: http://www.osram-os.com/osram_os/EN/Press/Digital_Press_Kit/Projection/index.html