A spokesman for Japan Display said he could not comment on specific customers.
Apple reportedly plans to launch three OLED-based new iPhone devices in 2020 available in 5.42-, 6.06- and 6.67-inch sizes, respectively, according to sources from Taiwan's handset component supply chain.
Fanning these flares, DigiTimes specifies slight size changes to Apple's different iPhones in 2020 - 6.06 and 6.67-inches - however these give off an impression of being changes of the iPhone XR and iPhone XS Max.
Japan Display to provide Apple Watch with OLED screens
It is well-known that the OLED display is the most expensive component mounted on an iPhone and the main reason for the current price tag of the devices. If the information is correct, then this year's iPhone XR's successor would be the last iPhone with an LCD display.
The size of a standard iPhone has stayed the same between generations, with the iPhone X and iPhone XS boasting a 5.8-inch display - but that might not be the case for much longer. However, it also isn't pushing things as far as the SE and 5C, which were both a mere 4-inches. Samsung-made displays will likely remain the top choice for upcoming iPhone models due to advanced expertise and scale so we might not see Apple phones with JDI displays in the near future.
DigiTimes also talked about the 2019 iPhone models. From the looks of it, iPhone XS is going to sport the 6.06-inches display and iPhone XS Max will ship with the slightly larger 6.67-inches display. There are various benefits of using OLED displays. The Y-Octa technology provided by Samsung involves the use of a high-quality AMOLED display which is considerably thinner in comparison to previous designs. This will easily make the iPhone as a gaming controller and can be the all-in-one gaming platform. Also, in December of 2018, an Apple patent was filed which showed that the iPhone can have screens wrapped all around it.