A new material for the blue diodes in an OLED panel triples the current luminous efficiency preventing the dreaded burn-in problem and increasing the lifespan of the screen significantly. A dual-stack OLED display method adds 30% lower power consumption to the increased lifespan, too.
https://www.notebookcheck.net/Dual-stack-OLED-display-tech-and-new-blue-diode-material-to-increase-device-lifespan-and-battery-life.608560.0.html