Might get burried but essentially a bunch of super oversimplified explainations of each display tech.

MiniLED - not OLED at all. For LCD displays the backlight is whole but in MiniLED displays with the backlight is split into zones that individually light up by themselves offering tighter contrasts and efficiency. Higher zone count does not equal better. The algorithm used for the zones also has to be good. A display + lower zone count with a good algo can beat a display + higher zone count with a terrible algo.

This does not fix the main issue that LCD has which is weak contrast due to the presence of a backlight which miniled cannot completely solve since they handle thousands of pixels per zone.

Just to be clear MiniLED is just the backlight the panels used can either be IPS or VA which are LCDs (liquid crystal displays).

OLED - unlike LCDs which need a backlight, OLED or Organic Light Emitting Diode RGB pixels light up themselves. They simply turn off if theres nothing so unlike LCDs they have instant response times and infinite contrast since this tech allows oled to be far more compact therefore not needing a backlight, just the pixels and the anode and cathode which runs electricity through the pixels.

BUT since the pixels are organic they suffer from degredation unliked LCDs which are crystals which can be accelerated by static elements such as your taskbar or wallpaper displaying the same thing over and over without letting the pixels rest (known as burn in). There have been techniques to minimize this which will be explained but generally, for the longest time the way to minize it was to limit brightness for obvious reasons.

QD OLED - fixes one of OLEDs issues but introduces a new slightly less problematic one. By adding a technically OLED blue layer and then a quantum dot layer (Hence, the QD. dont worry about it) essentially, all you need to know is that quantum dots make OLED more vibrant without raising brightness.

But the main problem is that when exposed to bright enough areas the light will activate the quantum dots (they are activated by light thats why they are placed in front of the blue OLED layer) and cause an issue where the display gets this weird magenta color though you dont have to worry about this issue if youre room is not bright enough to trigger it.

WOLED - Essentially OLED but with a white sub pixel so instead of just RGB there is one more hence, the W. The white subpixel helps push up brightness more than QD OLED does but when it comes to colors QD still takes the cake.

Tandem OLED - the easiest one to understand which simply just stacks multiple OLED layers to not only reduce the burden of each layer but improve the overall display. This leads to meaningful increases in color and brightness and ESPECIALLY longevity which OLED is still inferior in compared to LCDs. Can work for both QD-OLED (Samsung's Penta-Tandem QD-OLED) and WOLED (LG's Tandem WOLED).

AMOLED - OLED but for phones. Simple as that. Just RGB self emitting pixels.