Hi 2 All,
I have galaxy s4 installed offical 4.4.2, when i open setting or task manager in very dark place, i saw abnormal brightness in background.
i thinks it should be black as it is amoled.
is it normal or serious?
is it sign of screen burn?
sutharmukesh88 said:
Hi 2 All,
I have galaxy s4 installed offical 4.4.2, when i open setting or task manager in very dark place, i saw abnormal brightness in background.
i thinks it should be black as it is amoled.
is it normal or serious?
is it sign of screen burn?
Click to expand...
Click to collapse
Open a completely black image. Download a solid black JPG from google as your test. Do the same thing with a completely white image.
Look at those images in full screen mode.
If there is burn in (which CAN happen on an LED screen, though it's actually pixel fading rather than burn in) you should be able to notice it with this test.
If you see fading in the white image, or general non-uniformity in the brightness, it's a sign of fading. (burn in)
If you see a ghost image in the black image, then something is wrong. It means the screen is lighting up when it shouldn't be.
You should not be able to see a residual image on a black screen like you used to with an old CRT computer monitor. The burn is doesn't work that way. What happens is the pixels lose some of their brightness over time. It's subtle, and if the screen is fading uniformly you probably won't notice. But when 1 spot isn't fading, you notice it quickly. This is most commonly seen with the status bar. If it's always black and the area right beneath it is always colored, then the black status bar wont' fade and the rest of the screen will.
Skipjacks said:
Open a completely black image. Download a solid black JPG from google as your test. Do the same thing with a completely white image.
Look at those images in full screen mode.
If there is burn in (which CAN happen on an LED screen, though it's actually pixel fading rather than burn in) you should be able to notice it with this test.
If you see fading in the white image, or general non-uniformity in the brightness, it's a sign of fading. (burn in)
If you see a ghost image in the black image, then something is wrong. It means the screen is lighting up when it shouldn't be.
You should not be able to see a residual image on a black screen like you used to with an old CRT computer monitor. The burn is doesn't work that way. What happens is the pixels lose some of their brightness over time. It's subtle, and if the screen is fading uniformly you probably won't notice. But when 1 spot isn't fading, you notice it quickly. This is most commonly seen with the status bar. If it's always black and the area right beneath it is always colored, then the black status bar wont' fade and the rest of the screen will.
Click to expand...
Click to collapse
Thanks Sir,
actually it was lcd problem
Related
Well just noticed that when in portrait while browsing that I have a ghost image of the status bar on the left side of my screen. I was thought to believe amoled did not have this problem but nothing I have done has gotten rid of it. My phone goes into standby after 1 min and I keep screen at about 80% brightness. Any one have any ideas how to get rid of this ghost image?
Might be doing a warenty claim if there's no way to get rid of it....
screen shot please...
Nycro said:
I was thought to believe amoled did not have this problem
Click to expand...
Click to collapse
As I understand it, AMOLED is worse for burn in than CRT screens.
Well taking a screen shot will not show it as its the screen. . I do not have another camera laying around atm or I would try to use that to show it. Basically on light backgrounds such as white or the color of this fourm you can see a outline of the status bar. Basicly darker on that side of the screen... anyone else having this problem?
Would I be correct in the assumption that if you have a program in which you can change the program's appearance, would it consume more battery power if the appearance has more "lit" pixels than "dark" or "unlit" pixels?
For example, I use a calendar program called ThumbCal. It comes with numerous skins. For the purpose of this discussion, let's assume that there are only two skins. One skin is basically a white background with black lettering, while the other is a black background with white lettering.
Clearly, the one with a white background is considerably brighter than the one with a black background. Both are equally legible, but the white background is brighter because more pixels are lit to display the white background.
My question is this, will the program use MORE battery power if the white background skin is used? It seems logical because more pixels are lit, or on.
Am I right?
Thanks,
Peter
No. On an LCD screen, like the HD2 has, there is a uniform backlight under the screen, white pixels let that light through, while black ones block it. Even on a full black image, the same amount of light is still generated, only to be blocked and dissipated in the screen just afterwards. So, consumption is independent of the displayed image.
It would be true on an OLED display, where each pixel is indeed an independent light source.
kilrah said:
No. On an LCD screen, like the HD2 has, there is a uniform backlight under the screen, white pixels let that light through, while black ones block it. Even on a full black image, the same amount of light is still generated, only to be blocked and dissipated in the screen just afterwards. So, consumption is independent of the displayed image.
It would be true on an OLED display, where each pixel is indeed an independent light source.
Click to expand...
Click to collapse
Great explanation, and completely understood. Thank you.
Peter
Hello everyone.
I'm focus user, today I find White color issue on the fisrt pixel line from left of screen (see picture).
(I can't post picture)
farm6.static.flickr.com/5247/5289192085_dcb768a355_z.jpg
Are someone has same issue? and how to fix it? thank you very much.
sorry for my bad english
The best I could to to check mine was to open up my email. The whole screen is white. I did not see anything except white along the edge.
wildbilll said:
The best I could to to check mine was to open up my email. The whole screen is white. I did not see anything except white along the edge.
Click to expand...
Click to collapse
thank you very much.
please try in LCD Test(*#0*# in Diagnostic Mode) select RED you will see a white border but on my device left-border is green (other sides are OK).
It's very hard to be absolutely sure on red, but on blue and green the edges are definitely all white.
wildbilll said:
It's very hard to be absolutely sure on red, but on blue and green the edges are definitely all white.
Click to expand...
Click to collapse
thank you.
It is green on the left side of mine, some its more subtle, others its still obviously green.
thank you.
I test again on black image with 1 pixel white border.
this is result you can see green color on left side (top in picture).
farm6.static.flickr.com/5281/5291981589_e82aa1dfef_z.jpg
this is test image.
farm6.static.flickr.com/5007/5291981623_11340868b6_b.jpg
I loaded your JPG onto my Focus and the left side is green. The left side is always green, but the right side and even the top and bottom can also appear green if you hold the phone at certain angles. The green can also appear purple at extreme angles.
Is this a manufacturing flaw, or just a characteristic of AMOLED screens? Could it be some sort of back-lighting source that's located along the left edge that's causing the green tint?
I loaded the picture after downloading it and then attaching it to an email.
It does have a strange tint on the left side.
I then created my own version of the image. I started with a 480 x 800 blank image in Photoshop. I filled the entire image with black at 100% opaque.
Then I stroked the outer edge with 1 pixel of white. I repeated this using 2 pixels and then 3 pixels. As you can see, it is still visible at 3 pixels, but it is starting to turn white. I think we are seeing a consistent result that means the AMOLED screens have a slight design problem that is not considered to be worth holding back this technology from the market. I know I like the display and this is minor.
i have this problem(maybe common in amoled devices) if i take gray pitchure and put it on background there is distorsion in grey. like brighter and darker stripes(but you need to look it realy good) for exsample download program screen helper lite and tell me do you see stripes on main gray program screen.
There is a thread going for so long,
http://forum.xda-developers.com/showthread.php?t=1079444
Regards.
I think that he meant this:
http://forum.xda-developers.com/showthread.php?t=1075364&highlight=banding
http://forum.xda-developers.com/showthread.php?t=1121840&highlight=banding
I dont think he is refering to both yellowish screens or banding.
I'm having this issue too. It doesnt show itself unless the screen brightness is turned down, and especially an grey background. There will be faint large vertical stripes. It is as if the backlighting is uneven. Increase the brightness and it'll go away.
Seeing that i do not have the yellowish screen problem, no stuck/dead pixels and no bluish tint problem, im very reluctant to send this phone back for a replacement due to this problem. Its something that i can live with.
Last night, I went to use my night clock app with my new LG v20. On my Note 7, the screen was totally 100% black except for the numbers.
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
(Note, this includes the 2nd screen which was also lit - and I had the brightness at 0%).
--
BTW, this may need to be a separate thread - on my phone I notice that the auto-brightness tends to be too dark. Any way I can adjust it to be brighter when in auto mode, or should I just go to manual ?
polstein said:
Last night, I went to use my night clock app with my new LG v20. On my Note 7, the screen was totally 100% black except for the numbers.
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
(Note, this includes the 2nd screen which was also lit - and I had the brightness at 0%).
--
BTW, this may need to be a separate thread - on my phone I notice that the auto-brightness tends to be too dark. Any way I can adjust it to be brighter when in auto mode, or should I just go to manual ?
Click to expand...
Click to collapse
Try turning off second screen and see what your results are.. Second screen has a seperate black light that slightly bleeds out to the rest of the screen. It was horrible on the V10 but much improved on the 20..
Swizzle82 said:
Try turning off second screen and see what your results are.. Second screen has a separate black light that slightly bleeds out to the rest of the screen. It was horrible on the V10 but much improved on the 20..
Click to expand...
Click to collapse
The night clock app has the option to turn off the notification, which also turns off the 2nd screen.
...oops. It did, until I followed your suggestion in the other thread about the more setting to enable time/date when in full screen or notification bar hidden. I'll have to get into the habit of turning *off* the more setting at night.
(Either way, doesn't help with the slight gray background color. I can probably just get used to it as long as I'm not damaging the screen by having it slightly on all night. I need to google if LCD screens have burn in problems I guess.)
--
Maybe I should just start pm'ing you all my questions
polstein said:
Last night, I went to use my night clock app with my new LG v20. On my Note 7, the screen was totally 100% black except for the numbers.
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
(Note, this includes the 2nd screen which was also lit - and I had the brightness at 0%).
--
BTW, this may need to be a separate thread - on my phone I notice that the auto-brightness tends to be too dark. Any way I can adjust it to be brighter when in auto mode, or should I just go to manual ?
Click to expand...
Click to collapse
I use this on all my phones since I feel stock auto is too dim. https://play.google.com/store/apps/details?id=com.velis.auto.brightness
polstein said:
The night clock app has the option to turn off the notification, which also turns off the 2nd screen.
...oops. It did, until I followed your suggestion in the other thread about the more setting to enable time/date when in full screen or notification bar hidden. I'll have to get into the habit of turning *off* the more setting at night.
(Either way, doesn't help with the slight gray background color. I can probably just get used to it as long as I'm not damaging the screen by having it slightly on all night. I need to google if LCD screens have burn in problems I guess.)
--
Maybe I should just start pm'ing you all my questions
Click to expand...
Click to collapse
Sent from my LG-H830 using Tapatalk
Use comfort view on low or medium. Will help lower the ~9000K color temp some and help blacks a hair. Faint glow is typical on LCDs. Higher quality LCDs and higher quality led's can help. Lg skimped here. Sucks they didn't even give us color modes to pick from. The colors are waaay off. But using comfort view dims the blue pixels and helps considerably.
polstein said:
On the v20, the entire screen was stil lit - faint, but clearly still lit up in a light light grey.
Is this just how an LCD screen works, or is there something I have to do in order to get the rest of the screen to go off.
Click to expand...
Click to collapse
That's just how LCD works, they need CCFL or LED back light to lit up the screen, it's not possible for it to be completely black while turned on. With AMOLED the individual pixels can turn off itself which is why the black are blacker on them. OLED screens also have very high refresh rates which eliminates flickering, this is good for people who are concerned with eyes health.
Lcd doesn't get burn in, but it can get ghost image retention. It was f***ing horrible by the end of my V10 usage.. Never had the problem on the G2 3 or 4. Just the V10, even after factory resetting.
Swizzle82 said:
Lcd doesn't get burn in, but it can get ghost image retention. It was f***ing horrible by the end of my V10 usage.. Never had the problem on the G2 3 or 4. Just the V10, even after factory resetting.
Click to expand...
Click to collapse
Had the same issue my V10, that is my biggest V20 concern. . My v10 was not even a year old.
I get the engineering and cost reasoning, but not sure I like the lcd screens.