OLED means Organic Light Emitting Diode
The pixels in OLED displays (for tv, mobile phones or computers) are made of a material that glows when you put electricity through it. That may not seem like a huge difference when compared to LED, but OLEDs can be made to be extremely small and they are very flexible. On an OLED TV, each pixel lights itself up independently of the others, and when those pixels are shut of, they are completely black. OLED screens also have a much better color quality. OLED screens are more expensive than LED screens, and also have a short lifespan.
Difference between LED and OLED
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