Laserdriven Matrix Headlamp for Heavy Goods Vehicles




Truck drivers are sitting many hours at the steeringwheel every day. Especially at dusk, this activity can tire your eyes. For more safety on the roads, it is therefore extremely important to establish a high-quality lighting technology for trucks.

Matrix headlamps can modulate the emitted light in segments and thus create an optimal traffic-adapted illumination of the road. Modern systems no longer only have segments, but can also represent pixels.



After LEDs have complemented / replaced the traditional illuminants and became state of the art, the use of lasers in automotive lighting followed. Laser headlights are a popular marketing tool for high-priced vehicles. But so far, this technique has only been used for far-field illumination.

The real advantage of the laser light was neglected. Lasers are very easy to modulate. The beam can be redirected with movable mirrors. Furthermore, the laser can turned on and off in very short time sequences.



To generate sufficient luminosity, four laser diodes are coupled via a prism. The focused laser beam strikes a scanner array. These are two mirrors with rotation axes rotated by 90 °. The laser beam is projected on a phosphor converter. In simple terms, this converter is shaped like an insect eye to compensate for the angle of incidence of the laser beam on the corresponding area.
The brightness is controlled by the laser pulses per time interval. The laser must therefore be controlled according to the mirror position.



For this project, a towing vehicle concept was also designed to make the headlamp suitable. Since modern lighting technology is used here, a very technical appearance was supposed to be produced. This is transported by chrome-plated clasps, dark and edgy elements and visible heat sinks.



Here are a few sketches from the design phase.


Laserdriven Matrixheadlamp for Trucks


Delvis GmbH | HS Magdeburg / Stendal

This lamp was created as a master thesis at the Delvis GmbH in Wolfsburg. It was a very instructive time. Already during my master studies I worked in the company and was allowed to participate in many exciting projects. Unfortunately, due to the complexity of the concept, it was not possible to build a functional model.