Light Distribution by Software
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© Marelli Automotive Lighting
Light Distribution by Software
AUTHOR
Thomas Winz is Software Project Manager at Marelli Automotive Lighting in Reutlingen (Germany).
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Manufacturers aim for implementing new and higher-quality technologies into new generation vehicles. Meanwile the recognized rules of technology require compliance with the OEM standard SPICE. This increases the effort involved in electronics and software development. Agile methods within the SPICE framework provide an answer to this.
FRONT LIGHTING REDEFINED
One of the reasons for the increasing complexity of software systems is the desire to meet customer requirements for the coming vehicle generations. Creativity techniques in particular are necessary in the design and development phase to determine enthusiasm factors. Software systems and their iterative development opportunities are becoming increasingly important. In the context of accelerated vehicle development periods and the associated shortening of the time-to-market of every vehicle generation, a strong focus has been established on the reuse of vehicle functions and components. Functions that have been taken for granted for decades now have to be questioned and reevaluated by the development. The front lighting technology is given a special role. Light as software, in combination with the digital light module h-Digi from Marelli Automotive Lighting, enables the front lighting technology to project high-resolution, situation-dependent and real-time light distributions together with supporting assistance and warning symbols onto the street. The new ability of the headlamp therefore not only increases driving comfort and safety, but also plays an essential role in semi-autonomous and autonomous vehicle development. The possibility to place relevant areas in the technically optimal lighting scene for the cameras will enable vehicle AI to physically capture the environment better than humans can. However, in fully automatic robotic driving light can also build up an emotional relationship between the customer and the vehicle. ALGORITHM STEERS THE LIGHTING MODULE
The h-Digi lighting module contains 1.3 million pixels and is the first use of digital micromirror technology in an automotive application. The composition of the light distribution was previously done in the front lighting technology using reflectors and lenses. The algorithms of the so-called light distribution as software system were therefore developed as the first agile project within the existing automotive framework SPICE (System Process ImproveATZ electronics worldwide 10|2020
ment and Capability Determinition) for series production at Marelli Automotive Lighting. This posed new challenges for the series development of hardware and software for electronics. Of course, it was also necessary to be able to adjust this headlight and its light modules in a way that a spot-free and undistorted image was drawn onto the street. Using sensors the vehicle first detects its surroundings. In order to request the appropriate li
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