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Old 07-06-2009, 05:06 PM   #44
kacir
Wizard
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Posts: 3,463
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Join Date: May 2006
Device: PocketBook 360, before it was Sony Reader, cassiopeia A-20
Quote:
Originally Posted by Godzil View Post
They are in fact 166dpi to be exact. Sony advertise 170dpi, but it's false

Aehm ...
Math was not you favourite subject, was it?

Sony (Kindle 1 and 2, cybook, ...) has 6 inch screen with 800x600 pixels
new Opus has 5 inch screen with 800x600 pixels resolution.

let's do a little bit of math here:
5 inch diagonal 800x600 screen makes classical pythagorian triangle 3,4,5
let's check it:
3^2 + 4^2 = 5^2
9 + 16 = 25

OK. we have established that 5 inch screen has dimensions exactly 3 x 4 inches.

Now, bear with me
800 pixels / 4 inches is ...
TADAAAAAA
200 pixels per inch. *Exactly* 200 pixels per inch.
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