A 4K TV simply boosts that pixel count. Usually, it refers to a display resolution of 3,840 x 2,160, or 2160p. That's roughly four times larger than a 1080p picture, hence the term 4K.
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Because a 4K TV has four times as many pixels on the screen as a 2K 1080p TV, it analyzes the incoming signal and "fills in the blanks" for non-4K content. Blu-ray players and A/V receivers may ...
delivers four-times the number of total pixels compared to 1080p High Definition (HD) resolution. This enables 4K images to offer better clarity with more detail. 4K streaming on YouTube TV is ...