The next big leap in smartphones and cameras is the ability to project images onto larger surfaces with an integrated pico projector for easy navigation. This is commonly referred to as an embedded projector that uses LEDs as a light source. In order to see the projected image in the presence of ambient light interference, the light source must have a sufficiently high brightness. Therefore, the biggest challenge facing lighting technology so far is the lack of light efficiency of green light-emitting diodes. Today, OSRAM Opto Semiconductors has launched the Osram Ostar Projection Cube, which provides an excellent solution to this problem.
Efficient red and blue LEDs have been around for a while, but green LEDs with satisfactory light output are extremely rare. Now, OSRAM Opto Semiconductors has launched the new Osram Ostar Projection Cube to fill this gap. Compared to other green LEDs previously used in the embedded projector industry, the new LEDs are leading the way with 110 lumens per watt (lm/W).
Osram Ostar Projection Cube is the first to achieve high output in embedded projector applications. Wolfgang Schnabel, LED projection application marketing manager at OSRAM Opto Semiconductors in Germany, stated: "This new LED almost doubles the brightness of the light source in smartphone applications, and the embedded projector can achieve a system brightness of up to 25 lumens." Even if there is interference from ambient light, the projected image can be very clear. In addition, thanks to the energy-efficient LED technology, even mobile devices with limited battery capacity can have built-in projectors.
Small footprint and high luminous intensity
The Osram Ostar Projection Cube is available in two versions with 1 mm and 0.75 mm sides, making it suitable for a wide range of standard imager formats in mobile devices. Both versions are bright, with 260 lm (700 mA, 2.3 W) and 130 lm (350 mA, 1.2 W), depending on the chip size.
The Osram Ostar Projection Cube LED is packaged in a special package to produce high brightness in a small area. This package strictly defines the light-emitting surface, and light can only be emitted from a defined surface without causing package reflection. With an area of â€‹â€‹3.8 x 4.1 mm2 and a height of only 0.6 mm, it contributes to the extremely slim projection unit and is ideal for modern smartphone and camera designs. In addition, the Osram Ostar Projection Cube does not contain a glass cover, so its spacing from external optics can be small, allowing the emitted light to be fully utilized.
During the 2012 projection industry summit in Las Vegas, Mr. Francis Nguyen of OSRAM Opto Semiconductors' German headquarters will deliver a speech entitled â€œDevelopment History of LEDs for Micro Projectorsâ€ on June 11, 2012. Participants showed off this new LED.
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