The 43UF7767 has a maximum display resolution of 4K Ultra HD. That's over four times the display resolution of the most common HD type of Full HD. 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 across all TVs of a similar age and type to the 43UF7767.
An HD Ready HD type is the worst display resolution amongst comparable types of television.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.