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Old 11-20-2012, 01:09 PM   #1
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Thumbs up Paperwhite screen solution...



I've had my Paperwhite since they were first shipped. It has never had a "bad" screen.

Recently it started to show some small signs of color. It has always shown the little cones of light from the LED bulbs but this was new.

I dug out my eyeglass cloth and cleaner, shut off the PW and carefully wiped the screen with the cloth after spraying some cleaner on the cloth, not the screen.

Voila! My PW is back to essentially perfect. Others should try this and report. I have a funny feeling that this is the answer.
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Old 11-20-2012, 01:37 PM   #2
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So are you thinking the fingerprints are causing the color hues?
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Old 11-20-2012, 01:52 PM   #3
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Quote:
Originally Posted by detayls View Post


I've had my Paperwhite since they were first shipped. It has never had a "bad" screen.

Recently it started to show some small signs of color. It has always shown the little cones of light from the LED bulbs but this was new.

I dug out my eyeglass cloth and cleaner, shut off the PW and carefully wiped the screen with the cloth after spraying some cleaner on the cloth, not the screen.

Voila! My PW is back to essentially perfect. Others should try this and report. I have a funny feeling that this is the answer.
Sorry, but that is nothing more than wishful thinking. There are far too many reports and, I daresay, many keep their screens immaculate, as I do. The hues remain.
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Old 11-20-2012, 01:54 PM   #4
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The hues remain...

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Originally Posted by Skydog View Post
Sorry, but that is nothing more than wishful thinking. There are far too many reports and, I daresay, many keep their screens immaculate, as I do. The hues remain.
Maybe your fingers are more oily than average.

"The Dude Abides!"
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Old 11-20-2012, 01:55 PM   #5
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The light diffuser is basically a diffraction grating. Colour fringing is inherent in the design.
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Old 11-20-2012, 02:00 PM   #6
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Maybe your fingers are more oily than average.

"The Dude Abides!"
You've got it backwards -- less oily. Still, irrelevant since I keep the screen clean.
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Old 11-20-2012, 02:01 PM   #7
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The light diffuser is basically a diffraction grating. Colour fringing is inherent in the design.
Precisely.
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Old 11-21-2012, 06:05 AM   #8
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Precisely.
Agree 100%. Diffraction defect.
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Old 11-21-2012, 06:10 AM   #9
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The light diffuser is basically a diffraction grating. Colour fringing is inherent in the design.
If it's to do with the light, why is there not a similar problem with Kobo Glo's, don't they use the same kind of tech for the light guide? And why is it more apparent in some Kindle's and not others?
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Old 11-21-2012, 06:30 AM   #10
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Differences in colour fringing represent tiny, tiny changes in things like the parallelism of the two faces of the diffusion layer. They're simply minute variations within the tolerances of the manufacturing process.
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Old 11-21-2012, 12:02 PM   #11
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Ok that can explain why there is some variation (but I'd still argue that there is something going wrong in the worst cases, which are patently not just down to user perception). But do they not use the same tech in the Kobo Glo as they do the Paperwhite for the light guide, or do we not actually know that?

Clearly there is some difference with the Glo, as it simply doesn't appear to suffer from this issue at all?
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Old 11-21-2012, 12:09 PM   #12
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There's all sorts of different methods that can be use to diffuse light. Perhaps Kobo are using a different method. I honestly don't know.

I entirely agree with you that some PW screens will exhibit more colour fringing than others, but I do think it's basically a question of how sensitive or otherwise the user is to the effect. I think my PW is great, but I don't know whether I have a "good" one, or if the colour fringes simply don't bother me. I have seen a couple of others owned by people I work with, and they seemed just the same as mine to my eyes.
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Old 11-21-2012, 02:54 PM   #13
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I have seen some that others claim to be horrible, but I didn't think they were that bad. Certainly worth replacing...

Mine is fine, though.
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Old 11-21-2012, 03:01 PM   #14
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One thing that might be contributing is the capacitive touch layer. Maybe part of the problem is the light reflecting from the touch layer. The Kobo is still using IR touch so there is no layer between the light and the screen.
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Old 11-21-2012, 03:02 PM   #15
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I have seen some that others claim to be horrible, but I didn't think they were that bad. Certainly worth replacing...

Mine is fine, though.
Pictures or it didn't happen.
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