4K Ultra HD is four times the pixel resolution of Full HD 1080p. Full HD has 2 million dots, or pixels (1920 X 1080 – this means 1920 pixels wide & 1080 pixels tall). 4K has 8 million pixels (3840 wide & 2160 tall). So for every pixel on a full HD TV, there are four smaller pixels on a 4K TV. With four times more pixels, even the smallest details in a picture are visible.
Sharp’s propriety built-in Revelation 4K Upscaler creates a 4K (3840 X 2160) signal from any source, making the picture clearer and sharper, with more depth.
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