What exactly does OLED display mean? And how is it different from LED displays? Is one better than the other?
In: Technology
OLED should^TM be a display in which each subpixel is a separate organic light emitting diode and nothing else, unlike LED displays which use light emitting diodes as a backlight for two layers of polarized liquid crystal and one or more fluorescent or phosphorescent layers which give subpixels their colours.
An OLED display can completely turn off each individual subpixel simply by cutting power giving infinite contrast ratio and lower power consumption when browsing reddit in night mode, LCD displays can at best cut power to zones of the backlight if everything in that zone is black and even then will often have some light leak from adjacent zones.
Edit: to really ELI5 it, OLED screens are a bunch of tiny lamps that make a picture, while LED backlit LCDs use shadows to make the picture.
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