<P> Pixel shifting as described here was pioneered in the consumer space by JVC, and later in the commercial space by Epson . That said, it isn't the same thing as "true" 4K . More recently there are DLP projectors claiming 4K UHD (which the JVCs and Epsons do not even attempt to claim). </P> <P> As noted above, DCI 4K is 4096 × 2160, while 4K UHD is 3840 × 2160, producing a slight difference in aspect ratio rather than a significant difference in resolution . In traditional displays, such as LCD or OLED, there are 3840 pixels across the screen, with each pixel being 1 / 3840th of the screen width . They do not overlap; if they did, the detail would be reduced . The diameter of each is basically 1 / 3840th of the screen width or 1 / 2160th of the screen height - either gives the same size pixel . That 3840 × 2160 works out to 8.3 megapixels, the official resolution of 4K UHD (and therefore Blu - ray UHD discs). </P> <P> But the 4K UHD standard doesn't specify how large the pixels are, so a 4K UHD projector (Optoma, BenQ, Dell, et al .) counts because these projectors have a 2718 × 1528 pixel structure . Those projectors process the true 4K of data and project it with overlapping pixels, which is what pixel shifting is all about . Unfortunately, each of those pixels is far larger: each one has 50% more area than true 4K . Those pixel shifting projectors project a pixel, shift it up to the right, by a half diameter, and project it again, with modified data, but that second pixel overlaps the first . </P> <P> In other words, pixel shifting is not capable of producing adjacent vertical lines of RGBRGB or any other colours where each line is one pixel (1 / 3840th of the screen) wide . Adjacent red and green pixels would end up looking like yellow, with a fringe on one side of red, on the other of green - except that the next line of pixels will be overlapping as well, changing the colour of that fringe . Simply stated, there is no way 4K UHD or 1080p pixel shifting can reveal the fine detail of a true 4K projector such as those Sony ships (business, education and home markets). Also, JVC has one true 4K projector priced at $35,000 (as of mid-2017). </P>

What is the size of a 4k image