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OSRAM Creates a New World Record in the Laboratory

OSRAM Opto Semiconductors Press Release - 7/05/2007

Higher current handling capacity gives this chip prototype of the next generation a boost in brightness.

Output graph for OSRAM OPTO Red ThinGaN LED

Output graph for OSRAM OPTO Red ThinGaN LED

REGENSBURG, Germany. - Brightness values of over 300 lm have been achieved by OSRAM Opto Semiconductors with a red 1 mm2 chip featuring the latest InGAlP thin-film technology. The chips are designed primarily for projection applications, bringing a real boost in brightness to this sector. They will be used in Dragon and Ostar LEDs.

The chip prototypes will show their strengths in projection applications, particularly in Ostar Projection. They are more powerful than their predecessors and offer a much greater luminance for the same chip area. Much more light is therefore available for injecting into external optical systems. As a pure surface emitter Ostar LEDs are extremely efficient and can achieve much higher system outputs in projectors with optimum light injection.

Thanks to thin-film technology the chip surfaces are also scalable. This means that smaller chip surfaces are needed to produce a particular brightness. This is important especially for exterior automobile lighting because the same number of LEDs can be used to achieve greater system brightness.

Under laboratory conditions the red chip with a wavelength of 615 nm achieves more than 300 lm from an operating current of 2 A. With a power consumption of 6 W its efficiency is an impressive 52 lm/W. By comparison, the current red Platinum Dragon LED has an output of 96 lm from a consumption of 2.5 W, giving a luminous efficacy of 38 lm/W. “We have achieved this enormous increase in brightness above all by designing the new chips to handle higher currents. This has resulted from optimizing the series resistors”, said Dr. Ralph Wirth, development engineer at OSRAM Opto Semiconductors.

OSRAM expects the first light emitting diodes based on these chips to go into series production by the middle of 2008.

About OSRAM Opto Semiconductors

OSRAM Opto Semiconductors GmbH is the world's second largest manufacturer of opto-semiconductors for the lighting, sensor and visualization sectors. The company employs more than 3,500 people at its corporate headquarters in Regensburg, Germany and at its development and manufacturing sites in San José, California and Penang, Malaysia. The company produces opto-semiconductors for the lighting, sensor and visualization sectors. Perhaps best known are the light emitting diodes (LED) – tiny components, only a few millimeters in length, that convert electrical energy directly into light. Their color is determined by the semiconductor material used. Important advantages of LED technology include low power consumption, low thermal output, small dimensions and extremely long service life.

For more information, visit the company's website at:

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