The Nikkei reports that JOLED aims to start producing prototype OLED panels in the second half of 2017. JOLED developed a 21.6" UHD panel and actually aims to start offering the panel in 2017 to medical monitor makers and other commercial applications.
JOLED is using a printing based process and it is estimated that production costs will be 30% to 40% lower than evaporation based processes - but the performance of soluble OLED materials are not yet up to par with evaporation materials. The panels are made on an Oxide-TFT backplane, and the process is optimized for 10 to 30 inch panels. JOLED expects to achieve mass production in FY2018 (April 2018 to March 2019).