OLED displays use organic materials that emit light when electricity is applied. OLEDs enable emissive, bright, thin, flexible and efficient displays. OLEDs are replacing LCD displays in mobile devices and TVs.
Samsung's Super-AMOLED displays, announced in January 2010, are AMOLED displays with an integrated touch function. In a Super AMOLED display, a touch-sensor is placed over the display (on-cell). The thickness of the touch sensor is just 0.001 mm and this allows the screen to provide better images and to have great visibility even in direct sunlight (Samsung says that they perform 20% better than regular touch AMOLED outdoors).
In 2010 or so, achieving an HD resolution in a mobile phone was a great achievement, and Samsung used to market those displays as Super AMOLED HD or HD Super AMOLED display to make sure people know these are HD displays. Today, as most high-end mobile displays sport Full-HD (or even higher) resolutions, Samsung no longer adds the HD before or after the Super AMOLED.
Further reading
The latest Super AMOLED HD news:
Google working on a new Android 4 phone, to sport a Super AMOLED HD display?
Reports start to emerge about an upcoming Google phone that will be the first one to use their Android 4 (Ice Cream Sandwich) OS. Interestingly, these report say that the display will be a "Super AMOLED HD" (that's the first time we heard that description). Some say that this large display will support 720p HD video (1280x720). This is a very high resolution for a mobile phone - perhaps there is some mix-up between this device and a new tablet from Google?
Google Nexus S
If Google are indeed working on a new phone or tablet device, surely more details will emerge, and we'll keep you updated on that mysterious Super AMOLED HD display!
