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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).
Common screen dimensions are listed in the table below (the most common diagonal dimensions in inches as of 2020 are bolded). If the display is not listed, then the following equations can be used. Note that D is the diagonal (in centimeters or inches), W is the width (in pixels), and H is the height (in pixels).
Size Resolution Light source Contrast HDMI Notes References 32R433B 32" 720p 40R483B 40" 1080p: 40W600B 40W605B 40" 1080p: Edge LED 48W600B 48W605B 48" 1080p: Edge LED 60W605B 60" 1080p: Edge LED 60W630B 60" 1080p: 32W705B 32" 1080p: Edge LED 42W705B 42" 1080p: Edge LED 50W705B 50" 1080p: Edge LED 50W800B 50" 1080p: 55W800B 55" 1080p: 42W829B ...
A good rule of thumb is that your viewing distance should be about 1.5 to 2.5 times the TV's diagonal measurement. For a 50-inch TV, this means sitting between 75 and 125 inches away.
The below distinguish SAR (aspect ratio of pixel dimensions), DAR (aspect ratio of displayed image dimensions), and the corresponding PAR (aspect ratio of individual pixels), though it currently contains some errors (inconsistencies), as flagged.
The first commercial displays capable of this resolution include an 82-inch LCD TV revealed by Samsung in early 2008, [45] the Sony SRM-L560, a 56-inch LCD reference monitor announced in October 2009, [46] an 84-inch display demonstrated by LG in mid-2010, [47] and a 27.84-inch 158 PPI 4K IPS monitor for medical purposes launched by Innolux in ...
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