According to the patent, the phone would be split into two halves and joined by a hinge mechanism. The OLED screen itself doesn’t split, and instead bends around the hinged case.
Connections between the two case sections would be made through flexible printed circuit boards.
Apple is yet to make wide use of OLEDs, which emit light across a surface rather than from a specific point. However, it has introduced the technology through the Apple Watch, and sources – including blog Apple Insider – speculate that it is likely to feature in 2017’s iPhone.