OLEDs emit light, meaning they produce and discharge light so they don't require a backlight like most traditional LCDs, and are also thinner and more energy efficient.
When comparing an OLED vs a LCD, you'll immediately notice the OLED has better readability due to it's higher contrast and wider viewing angle.
Since OLEDs don't need a backlight you'll find they require much less power, and our perfect for low power applications.
For reference only. For design purposes, please use the specifications in the datasheet.