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shinew · 10-28-2011, 02:47 AM

I just bought my second K4 NT as a gift for a friend.

With my naked eyes when I put them side by side, at first i thought the new one had darker screen, then I swapped their position and looked again, I wasn't sure anymore... So I did another quick measurement for my second K4, it turns out the screen on the new kindle is EXTREMELY close to the one I bought a month ago.

The measurable brightness difference between the white is 0.02%, and 1.63% for black. To put the differences into perspective, attached are the 2 rendering using the closest matching RGB values. The difference is so small that I doubt anyone could reliably tell them apart in real use.

Which led me to believe that people who claim to have noticed huge varieties in terms of the screen quality on the K4s either had very bad luck, or simply being tricked by the different lighting(few inches a part and just a tiny angle shift makes a big difference!). Of course I've only measured 2 out of the millions produced, but if they are so inconsistent, I must've had incredible luck to pick out 2 of them that are so closely matched, and both of them have greater contrast than the K3 I've tested.

10-28-2011, 02:47 AM	#97
shinew Addict Posts: 309 Karma: 1008082 Join Date: Feb 2009 Location: NYC Device: Kindle PW, K4 Touch, iPad2, Samsung Galaxy S II	another k4 I just bought my second K4 NT as a gift for a friend. With my naked eyes when I put them side by side, at first i thought the new one had darker screen, then I swapped their position and looked again, I wasn't sure anymore... So I did another quick measurement for my second K4, it turns out the screen on the new kindle is EXTREMELY close to the one I bought a month ago. The measurable brightness difference between the white is 0.02%, and 1.63% for black. To put the differences into perspective, attached are the 2 rendering using the closest matching RGB values. The difference is so small that I doubt anyone could reliably tell them apart in real use. Which led me to believe that people who claim to have noticed huge varieties in terms of the screen quality on the K4s either had very bad luck, or simply being tricked by the different lighting(few inches a part and just a tiny angle shift makes a big difference!). Of course I've only measured 2 out of the millions produced, but if they are so inconsistent, I must've had incredible luck to pick out 2 of them that are so closely matched, and both of them have greater contrast than the K3 I've tested. Attached Thumbnails Last edited by shinew; 10-28-2011 at 03:08 AM.