All iPhone 7, iPhone 8 and iPhone XR devices use LCD displays. The iPhone XS and the iPhone XS Max, however, use higher quality OLED panels. At some point, however, none of these technologies will be found on Apple's devices.
Micro LED Displays Should Solve OLED Burning Problems
According to a report from [Economic News] the iPhone maker Foxconn is currently expanding its investment in the production of micro LED displays. The company is expected to receive orders from a large number of companies as soon as the technology is ready, but Foxconn's main focus will be on future iPhone display orders.
Unlike the LCD panels currently found on certain iPhones, micro LED displays do not require separate backlighting because the individual pixels emit light themselves. This means that, much like OLEDs, they can be made much slimmer than the corresponding LCD counterparts.
The disadvantage of OLED is that it is based on organic matter ̵
Unlike OLED displays, micro LED displays contain no organic substances. This essentially allows them to provide the deep blacks and contrasts of OLEDs, as well as no signs of wear such as LCD panels. In addition, micro-LEDs should be brighter and more efficient.
The Apple Watch could benefit from the technology before iPhones
Apple, like Foxconn, apparently invested a lot in micro LED technology to be used in future products. In fact, just over a year ago Bloomberg reported that Apple had a secret manufacturing facility in Santa Clara, California, where 300 engineers designed and developed the displays.
LED panels will bring it to market, the expectation is that they will be ready for mass production in 2023 at the earliest. And even then it is unlikely that it will be used immediately on iPhones.
This implementation strategy is broadly in line with Apple's original plans for OLED. Although the displays were not used on iPhones until the iPhone X 2017, the Cupertino giant had used the panels of its Apple Watch models since its launch in April 2015.
Apple's Short-Term Display Plans: OLED & mini-LED
Regarding Apple's short-term plans, it is reported that the 2020 iPhone series will be switched exclusively to OLED, meaning that the iPhone XR is the most popular third generation finally gives up the LCD display.
Analyst Ming-Chi Kuo recently predicted that Apple might start to introduce miniature LED displays. This technology is basically a less advanced version of micro-LED – it's less dense and less efficient – but it should solve the current durability issues of OLEDs.
It is still unclear at the moment if Apple has plans for mini LEDs on the Apple Watch or if the Cupertino giant simply skips the technology and waits for micro-LED panels to become available.