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INNOVATIVE LIGHTINGThe research and development division plays an important role in the continued manifestation of this philosophy. The result of their efforts can be seen in the third generation of the Audi A8, available beginning in spring 2010. Among others, the flagship car sets new standards for lighting design: The A8 is the first series sedan that generates light on demand for headlights and taillights completely using light-emitting diodes (LEDs). These tiny light sources open up new design possibilities, because several LEDs can be combined, allowing them to be bundled into striking lighting patterns. However, the lights still need to meet legal guidelines. For example, in Europe, rules dictate that headlights may not shine into the dipped headlights of oncoming traffic but need to light to the side, a bit higher and to the right in order to make pedestrians and traffic signs more visible. For taillights, however, a certain light intensity is required so that drivers following the car can recognize when the car in front is braking.  Source: Audi AG
“This is where lighting simulation comes into play,” explains Johannes Scheuchenpflug, Coordinator of Light and Visibility Simulation at Audi AG in Ingolstadt, Germany. If there are a number of light-emitting diodes, then each LED reflector needs to be laid out so that it contributes to the overall luminosity on the cover lens that observers of the rear light assembly will see. Using computer simulation, Audi can judge—even during development—whether the light intensity meets regulations and homogeneity requirements. For example, if light is produced by a taillight that consists of a dotted chain of light-emitting diodes, simulation allows them to determine whether a prototype taillight shining in different directions meets the legal requirements for a brake light or if they need to make changes. They can enter different camera positions and light sources, as well as LED light streams, to provide simulation data for calculations. Both designers and assembly managers are equally interested in the results of these lighting simulations. In addition to exterior lighting, Audi also conducts lighting simulations for interior lights affixed to the headliner. These lighting scenarios can tell them how interior light is distributed and if there is sufficient lighting in certain places. The goal is to accentuate the overall impression of the space, as well as make operating the vehicle at night safer.  Source: Audi AG
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