Compound Semiconductor January February 2010

compound semiconductor news digest
rhombus4
Audi A8 with
LEDs from
OSRAM Opto
Semiconductors -
28 Jan, 2010
LEDs take on major lighting functions in
main headlamps in Audi’s top-of-the-range
limousine.
In the new version of the Audi A8 light
emitting diodes from OSRAM Opto
Semiconductors are responsible for the
dipped and full beams as well as for other
specific lighting functions. Apart from their LED headlamps at night - OSRAM LEDs take on all theheadlamp functions in the new
efficiency, an excellent argument for LEDs is Audi A8.. Photo: AUDI AG
their long life, which exceeds that of the
vehicle. Plus, with light similar to daylight
they improve motorists’ safety. unnecessary and means savings for car beams, cornering lights, fog-lamps and even
owners. for use in daytime running lights. LED
Striking features of Audi’s current vehicles technology makes it possible: The elaborate
are the LED daytime running lights installed The use of diodes also increases driver mechanism with actuators, which is required
in the headlamps. In the new top-of-the- safety. The Ostar headlamp LEDs fitted in for cornering lights with conventional lamps,
range A8 OSRAM LEDs now take on the A8 illuminate the road surface with for example, can be replaced by
further lighting functions in the headlamps – perfect definition, without glare, and they appropriately aligned LEDs.
not only dipped and full beams are based produce a light similar to daylight, which
on the energy-saving LEDs from the Ostar enhances perceptions of contrast. In the Headlamps are therefore evolving from a
headlamp product platform. Special lighting peripheral field of vision especially, i.e. mechanical type of component to an
functions such as motorway beams, where pedestrians, animals or poorly lit electronic module, which can operate linked
cornering lights and all-weather lights are vehicles may suddenly appear at night, it is to the vehicle’s electronic system.
handled by LEDs. The technological easier to recognize objects with white LED For an innovative glare-free full beam, for
progress is readily identifiable – the light. But even potholes, obstructions and example, data from the navigation system
individual light sources are visible in the worn road markings are much more visible and information from a light-based driver
headlamps. That distinguishes the Audi thanks to the attributes of LED lighting. assistance system are combined. Thus, the
noticeably from other automobiles at night. Another benefit is that the color temperature lighting system can by itself illuminate only
“LEDs have left the niche market of limited is close to that of sunlight, so a driver’s eyes the required parts of the road when
edition and luxury vehicles and have arrived will not tire so quickly. cornering or in oncoming traffic. LED arrays
successfully involume production”, says play a particular role here in future –
Peter Knittl, LED automotive director at Essentially, this technology has the potential depending on the lighting function,
OSRAM Opto Semiconductors. “As they to prevent numerous accidents caused at individual LED pixels can be switched on or
already meet all the requirements of modern night. off, which enables light to adjust perfectly to
car lighting and set new standards in many various conditions.
respects, LEDs are perfectly suited to mass The future of vehicle lighting
market use.” The Ostar headlamp is available as a new
product platform with up to five LED chips.
Better light – for the car’s life An innovative conversion process provides a
LEDs offer carmakers like Audi significant seamless white colour impression at
advantages compared with conventional maximum brightness levels. Typical light
lighting solutions.With their energy values achieved for each LED chip are
efficiency, LEDs provide major energy 160lm at 700mA.
savings, which are ultimately reflected in fuel
consumption and CO2 emissions as well. Depending on the variant and operating
Besides, they have outstanding advantages current, values between 125lm and 1100lm
in terms of maintenance – the life of LED are achievable. With its scalable brightness,
solutions is as long as that of the vehicle, the Ostar headlamp is perfectly suited to all OSRAM LED light points in the dipped
which makes lamp replacements headlamp functions such as full and dipped beam of the Audi A8. Photo: AUDI AG
January/February 2010 www.compoundsemiconductor.net 13
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