What is the exact width/height of pure display area?

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wirk

Gawd
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Sep 2, 2014
Messages
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Is there anywhere a table from which one can read precise dimensions in mm of the display area for different sizes? Like for 5.0", 5".1, 5.2".....6.0", 6.1", 6.2" etc. I am trying to figure out what would be the size of smartphones assuming no display borders and very thin bezel and comparing with actual phones.
 
They all have different aspect ratios. You'll need both the resolution of each display as well as the diagonal length.

If you have those, you can plug them into the DPI Calculator. On that page, they do list some (but far from all) of the more popular phones, along with common PC monitor and TV sizes and resolutions.
 
1" = 25.4mm To get from diagonal to length and width, just use Pythagorean theorem (a^2 + b^2 = c^2)

So for a 5" 16x9 screen, a = 16x, b = 9x, c = 5" or 127mm. Plug in the numbers and do the math.

Code: 
        a^2 + b^2 = c^2          
(16x)^2  + (9x)^2 = 127^2
  256x^2  + 81x^2 = 16,129
           337x^2 = 16,129
              x^2 = 16,129 / 337
              x^2 = 47.86
                x = 6.92

16 * 6.92 = 110.72mm
 9 * 6.92 = 62.28mm
 
ryan_975 said:
1" = 25.4mm To get from diagonal to length and width, just use Pythagorean theorem (a^2 + b^2 = c^2)

So for a 5" 16x9 screen, a = 16x, b = 9x, c = 5" or 127mm. Plug in the numbers and do the math.

Code: 
        a^2 + b^2 = c^2         
(16x)^2  + (9x)^2 = 127^2
  256x^2  + 81x^2 = 16,129
           337x^2 = 16,129
              x^2 = 16,129 / 337
              x^2 = 47.86
                x = 6.92

16 * 6.92 = 110.72mm
9 * 6.92 = 62.28mm
Click to expand...

Thanks for the code. Not that I would not be able calculate this, I would ;), but I thought there might be a ready table somewhere. BTW, there is a convenient shortcut for calculating the width of the display which comes from a very good approximation to the equation (16x)^2 + (9x)^2 = (18,3x)^2 which means that the width of the display area is half of the diagonal (or just very slightly less). The width is critical for the evaluation what would be the biggest display size which wll fit to the palm of a hand without feeling too big, assuming the bezel is minimized. For example a 6" display width is 74,7 mm and 6.2" is 77,2 mm. It seems that with thin bezels phones with such displays would still not feel too big.
 
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