RiTdisplay at SID 2012
RiTdisplay is a PMOLED producer based in Taiwan that has several production lines making PMOLED panels. A few years ago it was considered the world's largest PMOLED maker, although I now hear that due to financial problems the company shut down some of their PMOLED lines (this isn't confirmed though).
At SID 2012, RiTdisplay showed several PMOLED panels, and some 3.5" AMOLED panels. RiTdisplay is Ignis' production partner for its a-Si compensation technology, which basically enables a-Si to be used as a backplane for AMOLED panels (instead of LTPS or Oxide-TFT). This should enable cheaper AMOLEDs. You can read more about this technology at my Ignis-at-SID post.