Korean news site ETNews says that LG Display is partnering with Apple, Google and Microsoft to develop a foldable OLED display for smartphones. The plan is for LGD to start producing such displays in 2018. LG Electronics is also part of this project, but apparently the first customers for these displays will be the three US-based companies.
ETNews calls these displays "out-foldable" displays, which probably means that the target devices are a smartphone-sized devices that open-up to have a tablet-like display. According to ETNews LGD recently developed an impressive prototype of those displays. LGD news is carrying out most of the development of this display.