Difference Between Full HD And 4k Ultra High Definition

I learned that the difference between Full HD and 4k Ultra HD is:
1. Resolution:
The resolution of 4K images is 4096×2160 pixels, which is 4 times that of 2K format and 16 times that of 1080P.
4K has 8 million pixels, while 1920×1080 HD has about 2 million pixels.
2. Display effect:
On the same screen, 4K Ultra HD TV has higher definition and color reproduction than 2K Full HD TV, giving people a more realistic feeling.
Pictures on Full HD TVs are relatively dull and colors may be distorted.
3. Applications of 4K Ultra HD:
Signal broadcast: Three important events of the 2014 Brazil World Cup were broadcast using 4K technology, including the final. This technology can provide higher definition than existing 1080p, giving viewers a more realistic viewing experience.