Two days ago we reported on rumors that Google's next gen Google Glass HMD (or "wearable computer") will use OLED microdisplays made by Samsung Display. I wrote that as far as I know SDC never developed OLED microdisplays, but apparently I was wrong.
One of my sources sent me a conference paper from 2011 describing a 0.6" XGA OLED microdisplay - made by Samsung Mobile Display. The OLED-on-silicon device (Samsung calls them OLEDoS) used white OLEDs with color filters (all OLED displays made today use this architecture, although makers are moving towards direct emission). I don't think Samsung ever produced such displays, but apparently they did make some successful prototypes.
Does this add credibility to the latest SDC OLED microdisplay in Google's next-gen Glass devices? I don't know. But it's good to know that Samsung (at least back in 2011) developed such a display. I'm guessing OLED microdisplays advanced since 2011 (for example eMagin's latest XGA EVF microdisplay is much smaller at 0.48").