The most common type of HDTV set, which has a screen resolution of 1,920 horizontal and 1,080 vertical pixels (1080p). Computer monitors are also widely available in this resolution. Since the arrival of 4K TVs, the "2K" is used as a designation in order to contrast a regular 2K HDTV from a 4K Ultra HD set. See 1080p, 4K TV and DTV.

High-Definition Resolutions2K    1920x1080 (see  DTV)

   4K    3840x2160 (see  4K TV)

   5K    5120x2880 (see  5K monitor)

   6K    6144x3160 (see  6K resolution)

   8K    7680x4320 (see  8K TV)

Lines of Resolution
This shows the relative difference in monitor/TV vertical resolutions.
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References in periodicals archive ?
It also allows the user to freely select and cut out part of a 4K image to be "trimmed" and then enjoyed on a Full HD 2K TV.
Despite a drastic cut in the prices of large-screen TVs and in some models with discounts of around Dh4,000 from the actual price of Dh20,999, sales are not growing and Babani cited growth in smart devices (smartphones and tablets) and people not being able to differentiate the present 4K TV picture quality from the old 2K TVs as main reasons.