The highest display resolution of the UN50JU7500 is 4K Ultra HD. That's over four times the display resolution of a Full HD TV, which is the most frequently found display resolution. 4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
A 4K Ultra HD HD type is in fact the best display resolution amongst all mid-size TVs that have been on the market for around the same time as the UN50JU7500.
The worst display resolution across comparable types of TV is HD Ready.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.