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List of common display resolutions - Wikipedia
The resolution 3840 × 2160, sometimes referred to as 4K UHD or 4K × 2K, has a 16:9 aspect ratio and 8,294,400 pixels. It is double the size of Full HD (1920 × 1080) in both dimensions for a total of four times as many pixels, and triple the size of HD (1280 × 720) in both dimensions for a total of nine times as many pixels. It is the lowest ...
For practical purposes the clarity of the image is decided by its spatial resolution, not the number of pixels in an image. In effect, spatial resolution is the number of independent pixel values per unit length. The spatial resolution of consumer displays ranges from 50 to 800 pixel lines per inch.
Apple's decision to make your background come alive with the parallax effect in iOS 7 means that using your standard wallpapers ends up giving you some not-so-sharp effects.
The standard aspect ratio for computer software, videogames, and analog video until the 2000s, as well as for early 35 mm film. Used on some modern devices such as the iPad. 3:2 (1.5:1) 2160×1440, 2560×1700 †, 3000x2000, 1500x1000 Used in some portable PCs since the early 2010s.
Resolution (pixels) Display size Pixel density BlackBerry: Priv [109] October 2015: Android 6.0.1 AMOLED: 2560 × 1440 5.4 in (140 mm) 540 Google: Pixel XL: October 2016: Android 7.1 AMOLED: 2560 × 1440 5.5 in (140 mm) 534 Google: Pixel 2 XL: October 2017: Android 8.0 P-OLED: 2880 × 1440 6 in (150 mm) 538 Google: Pixel 3 XL: October 2018 ...
The base resolution increased by increasing the width and keeping the height constant, for square or near-square pixels on a widescreen display, usually with an aspect ratio of either 16:9 (adding an extra 1/3rd width vs a standard 4:3 display) or 16:10 (adding an extra 1/5th).
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]