When it comes to TVs, 4K and Ultra HD (or UHD) are referring to the same resolution. Those TVs, along with Ultra HD Blu-ray, ...
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Pixels Per Inch Explained: The Essential Guide to Screen ResolutionIn other words, how many pixels per inch depends on the size and resolution of the screen you ... display you're planning for is an 84-inch 4K (3840x2160) screen (52.45 PPI): Divide the width ...
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