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The size of a screen is usually described by the length of its diagonal, which is the distance between opposite corners, typically measured in inches. It is also sometimes called the physical image size to distinguish it from the "logical image size," which describes a screen's display resolution and is measured in pixels. [1] [2]
PPI can be calculated from the screen's diagonal size in inches and the resolution in pixels (width and height). This can be done in two steps: Calculate diagonal resolution in pixels using the Pythagorean theorem: = + Calculate the PPI: = where
Find the optimal distance for a given screen. Example: for a 4K UHD screen 140 cm high (112 inches diagonal), the optimal distance is 140 × 1.6 = 224 cm. Find the right screen size. Example: for a 1080 HDTV used at a distance of 250 cm, you need to find a screen whose height is close to 250 / 3.2 = 78 cm (63 inches diagonally).
A common size for LCDs manufactured for small consumer electronics, basic mobile phones and feature phones, typically in a 1.7" to 1.9" diagonal size. This LCD is often used in portrait (128×160) orientation. The unusual 5:4 aspect ratio makes the display slightly different from QQVGA dimensions. 160×128 (20k) 160 128 20,480 5:4 UNNAMED UNNAMED
The aspect ratio also affects the perceived size of objects on the screen. [5] The native screen resolution together with the physical dimensions of the graphics display can be used to calculate its pixel density. An increase in the pixel density often correlates with a decrease in the size of individual pixels on a display.
It is expressed as two numbers separated by a colon (x:y), where x corresponds to the width and y to the height. Common aspect ratios for displays, past and present, include 5:4, 4:3, 16:10, and 16:9. To distinguish: The display aspect ratio (DAR) is calculated from the physical width and height of a display, measured each in inch or cm ...
To view multiple windows in AOL Desktop Gold, you'll want to resize and position them appropriately on your screen. You can also save the window size and position for the next time you sign in to Desktop Gold. Open the window you want to resize or move. Click and drag the outside border of the window to modify its size.
Often, screen specifications are given by their diagonal length. The following formulae can be used to find the height ( h ), width ( w ) and area ( A ), where r stands for ratio, written as a fraction of x by y , and d for diagonal length.