Microdisplays and Sensors

Fraunhofer FEP is closely collaborating with industry partners on smart glasses. Recently this happened in the collaborative project „Glass@Service – Interactive personalized visualization in industry processes at the Digital Factory”, lead by SIEMENS AG Berlin, including UVEX, Ubimax, DIOPTIC and Federal Institute for Occupational Safety and Health (BAuA). A follow-up project „secureAR – Secure AR service platform for industrial fabrication” has been started in 2020. Within „Glass@Service“, Fraunhofer FEP has created a 0.64“ 720p OLED microdisplay, featuring high frame rates, large contrast ratio and low power consumption. It provides resolution of 1280 × 720 pixels (full color at four sub-pixels) at dot sizes of 5.5 x 5.5 µm². Monochrome the resolution can increase fourfold, i. e., 2560 × 1440 pixels.
Pixel currents and luminance may be varied widely. Sub-pixel currents have been characterized up to 550 nA, enabling current density of 1.8 A/cm².

This new microdisplay has been implemented into an augmented-reality (AR) headset within the frame of this project.