Future LED chips could be sourcing light from a 30mm x 5mm low beam unit generating 1,400 lumens, with experts at Osram Opto Semiconductors developing an LED that promises a luminance three times that of existing versions.

The LED boasts an output of 200 megacandelas per m2, losing less than ten per cent of its intensity even at operating temperatures as high as 85°C. Whereas the achievement means that a single LED can be used to provide a complete low beam, several LED chips have always been needed in the past depending on the design and the type of LEDs used. .

"In developing the LED we applied our extensive experience in projection applications to combine the high-current technology used in such applications with UX:3 chip technology and ceramic conversion technology, which is standard practice for white headlight LEDs", said Stefan Grötsch, senior key expert at Osram Opto Semiconductors.

Even the special mounting technology based on the Osram Ostar platform was transferred from projection to this automotive application. This involves soldering the chip directly to the copper. The large amounts of heat produced as a result of the high output can be dissipated much more easily, which in turn greatly improves the thermal connection.

The high brightness values were measured in the laboratory, and the company is already working out the commercialisation of the LEDs, scheduled next year. Together with the use of laser technology which produces very high luminance, a series LED could lead to extremely compact headlight solutions, expanding the Osram product portfolio in this sector.

It is conceivable, for example, that headlights will become ultra-compact, comprising a laser high beam and LED low beam, and that other automotive applications such as interior lighting and new types of head-up display will follow. These displays will project important information directly onto the windshield, such as video of the area directly in front of the car, or navigation instructions, and will be much more vivid and graphic than is the case with existing systems. They will therefore be classed as "augmented reality" displays because they enrich the viewing experience with additional information and therefore create a fresh impression of reality.

By: DocMemory
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