How to power a OLED 128x128 display from 3.3v microcontroller board?
Driving OLED displays is easy, but you need to provide two voltages:


supply for the digital part of the display is 3.3V from your logic
supply for the display drivers is 10V - 18V from any step-up driver (higher voltage means higher brightness and also higher current)


For inspiration of the supply, here is breakout with your display display and also schematic.