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Technical Paper

High Efficiency Headlamp Systems with Variable Focus

1989-02-01
890687
The built-in space available for a headlamp in motor vehicles has been steadily reduced by vehicle manufacturers over the last few years. In order to continue to provide the driver with the necessary safety equipment, new headlamp designs with improved efficiency are necessary. One such new design, the reflector with variable focus (VF Reflector), is presented in this paper. The mathematical concept of VF reflectors is explained and the advantages in lighting technique over conventional reflector systems are illustrated by means of concrete examples.
Technical Paper

Glare Free Headlamp - First Approach and System Definition

2008-04-14
2008-01-0668
In Automotive Lighting, we have spent some time in the last years to discuss on the styling opportunities by introducing LED Light Sources instead of Halogen and/or Xenon bulbs. The appearance and the signature of a given vehicle defined by dedicated lighting equipment were and is still today a very important topic to develop a competitive vehicle. The light performance is under these boundary conditions a question of second priority. This is also valid, because lighting suppliers and car manufacturers achieved in the past decade a lot of improvements and have reached a level of performance, which is comfortable overall for the consumers. The issue with glare, which everybody has when driving at night is already accepted today as a given fact. This paper tries to define the next steps lighting suppliers need to take in order to improve this glare issue by considering alternative solutions.
Technical Paper

System Integration in Automotive Lighting - Improvements in Visibility at Night

2002-07-09
2002-01-1989
Within the last decade we have noticed considerable improvements in Automotive lighting devices. Xenon headlights, Systems with low beam and high beam out of one Xenon bulb, so called Bi-Function headlights and in the near future, advanced front lighting systems (AFS) will lead to an important contribution in terms of safety when driving at night. In parallel the philosophy of automotive engineering has changed from individual technical solutions contributing to improved value within the vehicles to a system integration concept, where individual technical solutions will be combined to one specific innovation. The use of various sensors and information tools for different and multiple applications within a vehicle is highly appreciated and will lead to synergies with reduced costs for the individual components. This philosophy will also be applied for lighting systems in the future. The potential applications and possible solutions will be described within this paper.
Technical Paper

Future Rear Lighting Trends - Safety Benefits with LEDs

2001-10-01
2001-01-3391
The paper deals with the current progress in rear lighting technology. Within the competition in offering the best vehicle for the individual customer safety aspects but also the appearance of the rear lights are getting more and more important. Our investigation is based on the equipment of LEDs within rear lamps. In combination with the CHMSLs (Center High Mounted Stop Lights) the styling but also the safety feature which one can realize is different. In achieving shorter reaction times when using LEDs there were already made some general experiments in a laboratory (1). For the first time we did experimental analysis of reaction times of stop function of rear lamps including CHMSLs in various combinations in real traffic conditions, taking conventional tungsten halogen bulbs and LEDs as a light source. The results will be presented in this paper.
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