Dot matrix vehicle headlamp module uses Osram micro-LED array

Each pixel measures 40 x 40µm, and can be individually tuned to form different beam shapes for different road conditions.

“It also provides dynamic curve light and precise glare-free high beam block-out zones to avoid blinding on-coming drivers,” said Marelli. “Furthermore the ‘h-Digi microLED’ can project warnings or driver assistance images on the road in the driver’s field of view.”

This is Marelli’s second generation of high-resolution projection system, following the 2018 digital micro-mirror-based ‘h-Digi’, which can be found in some premium-level vehicles.

The LED array is Osram’s Eviyos 2.0, designed for automotive use, and Marelli designed the associated optics.

Pixel resolution works out to be better than 0.1°, and two array options are offered: a 1:4 width-to-height ratio with 25,600 pixels, or a 1:3 (left) with 19,200 pixels. The array is the same, with 80 lines and 320 columns, although the 40 columns on each side of the 1:3 version are not tested leaving the centre 240 columns for use.

Osram also produces a companion asic for driving the micro-LED matrix, that has UART, RGB8 and SPI/CSI video options.

“High-resolution adaptive forward lighting is set to become the next big differentiator for vehicles from the world’s premium brands,” said Osram v-p Wolfgang Lex.

“The module enables us to develop solutions for global car makers – the system opens doors to applying the technology also in mid-level car segments,” said Marelli v-p Didier Thalgott.