Renault Group sells Avtovaz

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 Audi’s new Digital Matrix LED headlights will revolutionise safety, greatly reduce fatigue and stress in driving at night and even be able to communicate with other drivers, according to the car maker.

However, a number of Audi's more radical ideas - such as OLED tail-light clusters displaying warning symbols and the headlights projecting a variety of warning symbols onto the road surface - are held up by complex homologation laws across the globe.

The most striking of the various new light technologies revealed at a technical presentation last week at the company’s Ingolstadt headquarters is already an option on the new Audi A8.

Costing around €1800 (£1520) in Germany, the Digital Matrix Headlights (DMH) are based around a new Digital Micro Mirror device that houses 1.3 million micro-mirrors. These mirrors measure just a tenth of the width of a human hair and can be rapidly switched into two distinct positions. 

Inside the headlight, the light from an LED unit is bounced off the micro-mirror array and then sent through a projector lens. Because the resulting beam pattern is effectively made up of 1.3 million individual points of light, the result is closer to the projection of an image than a simple beam of light.

The upshot is that the DMH headlights can switch between very different beam patterns depending on the road conditions. Indeed, the micro-mirrors can be reangled as many a 5000 times per second, allowing the beam pattern to be minutely adjusted at blistering speed.

On motorways, for example, the beam pattern can be concentrated centrally, exactly illuminating the lane in which the car is travelling.

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