Learn how to create a simple heart rate monitor using an Arduino Pro Mini, PulseSensor, and OLED display. This ...

OLED boasts pretty much perfect viewing angles, so you get a great experience wherever you sit, while with Mini LED, viewing angles are always improving, but never perfect, and they vary quite widely ...

Put simply, in a mini-LED display, the LEDs are, well, mini. That's it. To be more specific, the term is defined as any display where the backlight LED diodes are no larger than 0.2 mm.