some ‘iPhone 13’ models will have OLED displays with low-power LPTO tech — Apple World Today

A low-temperature polycrystalline oxide (LTPO) display is a special kind of backplane technology designed for OLED screens and developed by Apple. LG Display is planning to put in low-temperature polycrystalline oxide (LPTO) thin-film transistors (TFT) equipment that can add 25,000 substrates per month in monthly production rate into the lines by next year, according to The Elec.

LPTO tech allows a variable refresh rate of 120Hz for a smooth display and is able to optimize battery life. LTPO displays can already be seen on the Apple Watch Series 5 and Series 6. 

Such tech would help bring 120Hz ProMotion screens to the iPhone. According to Apple, ProMotion tech “delivers refresh rates of up to 120Hz for fluid scrolling, greater responsiveness and smoother motion content.”