One of the chaebol's visions is for an OLED screen that can take your blood pressure and measure your heart rate, after first identifying you with a fingerprint.
Importantly, the entire display can read your prints. That's a change from current under-screen fingerprint readers, which are discrete components placed under a section of a smartphone display.
A Samsung spokesperson explained that the display's heart monitoring tricks are made possible because "OLED light is reflected differently depending on the contraction and relaxation of the blood vessels inside the finger, and when it returns to the panel, the OPD recognizes it and converts it into health information."
The spokesperson also pointed out that the most accurate blood pressure readings involve measurements taken from both arms. This screen can apparently get close to that accuracy by measuring blood pressure from a finger on each hand. Samsung reckons that makes it ideal for wearable devices.
Samsung also used the Society for Information Display's annual Display Week to show off a rollable screen that can expand from 49mm to 254.4mm in length. Rollables aren't entirely new, Samsung asserts its "Rollable Flex" effort is the first to offer 5x growth.