What is Ultra HDTV? 4K UHD FullHD HD Ready?

Today we find televisions with these 3 types of resolution. The difference between Full, Ultra and Ready is the density of pixels per area. The higher the number of pixels per cm2 greater the resolution, which is an important factor even better view images.
The Full HD TV offers resolutions up to 1920x1080. The TVs are also called FullHD 1080 by the number of horizontal lines. Most modern TVs offer this resolution, and we need to see the current HD Freeview channels. For 32-inch or smaller is not as important, but not recommended for large TVs HD Ready.

The HD ready TV inferior to Full HD resolution, 1280x720 so they are also called 720p. All models below 1080 are called HD ready. We recommend this resolution only in small models: less than 32 inches.

The Ultra HDTV offers resolution of 3840 x 2160 pixels, higher than FullHD. These TVs called 4K by the number of vertical lines, so have changed the nomenclature to improve advertising, these TVs should be named 2K. This technology is just coming to the usual TV and there are still no content to display.