how many pixels make up a uhd picture?
Pixels, pixels, and more pixels. Ultra high definition (UHD), or 4K, is the TV buzzword of the year (tied with OLED). Normal high definition (HD) refers to a display's resolution, usually 1,920 pixels wide by 1,080 pixels high. UHD displays pack four times that amount, measuring 3,840 pixels wide by 2,160 pixels high.