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Learn how to measure screen size by diagonal, width, height, area, and aspect ratio, and compare common display sizes of handheld devices, computer monitors and TVs. Find out the history, optimal viewing distance, and equations for different screen dimensions.
A 4:3 monitor. Until about 2003, most computer monitors used an aspect ratio of 4:3, and in some cases 5:4. For cathode ray tubes (CRTs) 4:3 was most common even in resolutions where this meant the pixels would not be square (e.g. 320×200 or 1280×1024 on a 4:3 display).
Pixel density is the number of pixels per unit area of an image device or file. It affects the resolution, quality and size of the output on different devices and formats. Learn how to calculate and use pixel density for printing, displaying and scanning.
A table of common display resolutions, sizes, aspect ratios, and color depths for various computer systems and devices. 1920x1200 is a resolution used by some portable devices and webcams, with a 4:3 aspect ratio and 2 bpp color depth.
The ratio of the width to the height of an image is known as the aspect ratio, or more precisely the display aspect ratio (DAR) – the aspect ratio of the image as displayed; for TV, DAR was traditionally 4:3 (a.k.a. fullscreen), with 16:9 (a.k.a. widescreen) now the standard for HDTV.
The image would be a very low quality image (72ppi) if printed at about 28.5 inches wide, but a very good quality (300ppi) image if printed at about 7 inches wide. The number of photodiodes in a color digital camera image sensor is often a multiple of the number of pixels in the image it produces, because information from an array of color ...
For example, a 12-inch Hercules monitor and adaptor with a thick bezel and a little underscan may offer 90 "physical" PPI, with the displayed image appearing nearly identical to hardcopy (assuming the H-scan density was properly adjusted to give square pixels) but a thin-bezel 14-inch VGA monitor adjusted to give a borderless display may be ...
Rack mount computer monitors are available in two styles and are intended to be mounted into a 19-inch rack: A fixed 19-inch (48 cm), 4:3 rack mount LCD monitor Fixed. A fixed rack mount monitor is mounted directly to the rack with the flat-panel or CRT visible at all times.