Last month JOLED announced that it started to sample 21.6" 4K OLED monitors. JOLED plans to develop these OLED monitors for medical applications - it will produce these in low volume at its current 4.5-Gen pilot production line, and will start mass production in 2019.
JOLED's CEO, Nobuhiro Higashiiriki, said in a conference that these first samples were shipped to Sony, which may become JOLED's first customer. JOLED says that the company managed to achieve a high quality and long lifetime, which was a challenge due to the printing process used.