Apple is reportedly testing E Ink’s electronic paper display (EPD) for potential inclusion in future foldable devices and / or tablets.
The big picture: Existing foldables with secondary screens typically utilize OLED or LCD panels. While these solutions afford superior resolution and responsiveness compared to E Ink displays, they aren’t nearly as energy efficient as E Ink panels. Such displays are often used for non-mission-critical functions like telling the time or displaying notification alerts where a less capable but more energy efficient solution would be better suited for the job.
