E Ink’s recently announced flexible color display. | Image: E Ink

Apple is reportedly testing the use of a color display from E Ink as an external screen for an unannounced foldable device, according to noted analyst Ming-Chi Kuo. “The color EPD [Electronic Paper Display] has the potential to become a mainstream solution for foldable devices’ must-have cover/second screen thanks to its excellent power-saving,” the analyst wrote in a tweet. He adds that the E Ink display is also being tested in “tablet-like applications.”

Most tablet-style foldables on the market today pair a large folding inner display with a smaller outer display for quickly checking notifications. But existing devices like the Samsung Galaxy Z Fold 3 or the Oppo Find N use OLED panels for both. Apple’s use of an E Ink screen would…

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