The new LED prototype replaces the car with a "bright" for the headlights
At the International Automotive Lighting Symposium (ISAL) in Darmstadt, Germany, September 26-28, 2011, OSRAM Opto Semiconductors will present two prototypes of new LED headlights: OSLON Black Flat and OSRAM OSTAR Headlamp Pro. Both prototypes feature new chip and packaging technologies and are equipped with ceramic converters. At the same time, they also have many advantages, including high light output, uniform light pattern, thermal stability and very good contrast ratio even at high currents.
As the "eyes" of a car, headlights require a more flexible light source. These light sources are not only reliable, they provide the right amount of light in all visible and driving conditions, but they must also perform a variety of functions to cope with changing environmental conditions, including the high temperatures of the headlights themselves. To meet these requirements, OSRAM has developed two new LED prototypes: OSLON Black Flat and OSRAM OSTAR Headlamp Pro.
OSLON Black Flat is the newest member of the OSLON Black Series, equipped with ceramic converters and QFN (Quad Flat No Leads) packages. The typical thermal resistance of this product is 5 K/W, which is 20% lower than the thermal resistance of other members of the Black series. Since the thermal expansion coefficient of the special material is consistent with the expansion coefficient of the metal core plate, the black package means high stability. This new LED does not require a lens, so the light it emits can be injected very close to the light guide. In addition, the pads are the same as those used in the entire product line, so even with roughly the same board design, the light output can be greatly increased. With a traction power of 2.3 W and an operating current of 700 mA, this new product achieves a typical luminous flux of 190 lm.
The OSRAM OSTAR Headlamp Pro meets many of the requirements for adaptability of output and environmental conditions, providing a more uniform light pattern, better thermal stability and higher brightness than previous versions. This 20 x 20 mm high-throughput LED is available in multiple versions from 2 to 5 chips.
With the new OSTAR solution, headlight manufacturers are expected to significantly reduce costs, ie, less investment, but achieve higher output. AFS (Adaptive Frontlighting System) functionality can be implemented with a chip that can be controlled individually or in series, introducing a configuration that allows for a matrix chip solution. The typical luminous flux of a single chip is about 250 lm (operating current is 1 A), which can be equivalent to a luminous flux of about 1250 lm for a 5-chip version; a thermal resistance of 2.1 K for a 5-chip version, which is also a thermal resistance of the previous model. 0.5 K lower.
Peter Knittl, Director of Automotive LEDs at Osram Opto Semiconductors' German headquarters, is confident: "These prototypes combine new technologies and new features to meet all the requirements of the headlight system, making them attractive to all models. Force, easy to promote." All prototypes are based on UX: 3 chip technology, high light output at high current. Their ceramic converters are responsible for ensuring the uniformity of the light pattern. With advanced packaging technology, the chip is packaged directly into the reflector, enabling clear light/dark boundaries to be created in the light pattern for very good contrast ratios. All of these features are a testament to the fact that these two LEDs are ideal for high-efficiency headlights. Both prototypes are currently available in the first batch and are scheduled to be launched in the third quarter of 2012.
The OSLON Black Flat (left) and OSRAM OSTAR Headlamp Pro (right) combine new technology with new features to meet all the requirements of a headlight system.
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