Apple is apparently testing flexible OLED displays in various sizes for its upcoming iWatch accessory, Korean media reports, which means that the maker of those screens is either Samsung, or, more likely, LG, given that both companies can make bendable OLEDs now...
Source: http://www.phonearena.com/news/Apple-mulling-three-flexible-display-sizes-for-its-iWatch-1.5-prototype-already-in-the-lab_id47870
Source: http://www.phonearena.com/news/Apple-mulling-three-flexible-display-sizes-for-its-iWatch-1.5-prototype-already-in-the-lab_id47870