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Old August 6th, 2013, 03:56 PM   #1 (permalink)
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Default text blur while scrolling?

Just picked up the s4 yesterday to replace my rezound. Love it so far....but. I am noticing a blur or ghosting behind text when I am scrolling. Most pronounced when scrolling bold black text like in the contacts list, Facebook, etc. I have seen some mention of this issue online. My device is updated and I am a Verizon customer. Think I'll go back to best buy today to test their demo models. Anyone else noticed this issue? Any fix? Thanks.

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Old August 6th, 2013, 10:07 PM   #2 (permalink)
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Yes, that's the nature of AMOLED HD screens, and what you described is consistent across all devices, while scrolling light color text on a very dark backgrounds.

AMOLED doesn't illuminate black pixels, it turns them off to preserve excessive battery usage, while lighting up the large screen to display content. The difference is quite substantial over a period of time. From 0.3 watts showing white text on a black background, to more than 0.7 watts showing black text on a white background.

During scroll, it produce the ghost effect as it needs to illuminate (turn ON) all the fine and tiny pixels of font outlines, very quickly. You might also notice a purple color ghost, following the text while scrolling. Which is simply the black color lighting up and turning off very quickly (not quick enough not to notice).

The way to combat this, is to set backgrounds to as little as 99 or 98% black.
Even tho the pixels get illuminated constantly, it's still far more battery friendly.

I do believe Samsung is aware of it, and it did, and will do changes to the interface to prevent that. I'm sure you won't notice so much of that when scrolling text on lighter background color. This is also prominent in the notification bar, when you swipe away your notifications.

While I can't give you fix for all the apps, I just wanted to let you know, that this is not just your device or isolated issue. It's a generic problem across all the S4s.

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Old August 7th, 2013, 03:54 AM   #3 (permalink)
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This was fixed in MGA firmware release.
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Old August 7th, 2013, 09:57 AM   #4 (permalink)
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Quote:
Originally Posted by SebaKL View Post
Yes, that's the nature of AMOLED HD screens,
The Droid Incredible did not have this problem, although I don't know much "HD" factors into that. When I got my S4, it was the first Con I found and I found it immediately. It's a terrible condition, especially for a flagship phone.
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Old August 7th, 2013, 10:15 AM   #5 (permalink)
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Quote:
Originally Posted by Colchicine View Post
The Droid Incredible did not have this problem, although I don't know much "HD" factors into that. When I got my S4, it was the first Con I found and I found it immediately. It's a terrible condition, especially for a flagship phone.
The HD factor is just large pixel density to illuminate. Larger that Droids screen. As I said above, it's easy to fix by forcing black to be at 98%, which will cause all pixels to illuminate, just at very low opacity, making it impossible to notice, and low enough not to effect the battery.
It's a price of trying to archive true black color.

Also, as Hawker mention, it was supposed to fix with the update. Tho my one, haven't been done yet. I still see the ghosting, especially in UCCW setting mode or notification. Hopefully, will be included with the 4.3 updated, later this year.
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Old August 11th, 2013, 11:17 PM   #6 (permalink)
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There is an option to turn this "feature" on and off somewhere.
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