ETNews posted the following chart, showing what seems to be LG Display's own forecasts for UHD (4K) OLED TV production from 2014 to 2020. These are just 4K OLED TVs - LGD still produces Full-HD OLEDs as well (for example in 2015, LGD plans to produce 86,000 FHD TVs, bringing the total number of OLED TV produced to 600,000).

LGD UHD OLED TV production forecast 2014-2020

According to the OLED Association LG indeed managed to increase production yields of 4K OLEDs. The company is now conducting extensive R&D in inkjet printing of OLEDs as this seems to be a promising route towards greater material efficiency and faster production