Display of text has banding? - Nexus One Q&A, Help & Troubleshooting

Has anyone ever noticed that when holding the screen in portrait mode, while viewing small black letters on a full white background, there is some gray banding behind the text? This is not the case when I make a screenshot with shootMe, and view it on my pc.
I will upload a file as soon as I can, to show what I mean. I don't know yet if this is a hw or sw error. I am using cyanogenmod 5.0.5.3 btw. Do not know whether or not it occurs on the stock ROM.
See hurricane-disco.nl/text.jpg for an image that does not show correctly.
See hurricane-disco.nl/textphoto.jpg for a photo of the actual image on my N1. Depending on the rest of the screen, there is more or less 'noise' in a row of pixels. When I turn the phone 90 degrees, I don't have this issue, but might come up with an image which does have the problem and will post it here then.

Related

Background Image Help

Hi,
I'm trying to put a background image of a car on my today screen.
When i put it on its far to close (pic to big). With my old M3100 you could chose how much and where abouts of the jpeg you wanted as background is there anyway to do this on the kaiser?
I've tried changing the resoultion then it works in wide screen but tiles it in normal mode which looks naff.
Any help would be appricaited.
Thanks
Jason
Go to Start | Programs | Pictures & Videos - then find your image you want to use as the background; select Menu | Set as Today Background and you'll get a window showing what part of the image will be used on the today screen - use your stylus to drag the rectangle left or right to suit and then just OK your way back out.....
HTH,
Mark.
Thanks, but even if i do that it still tiles or i can only see a small amount of the car.
I have tried numorous resoultions on the jpeg then put it on my phone but still no joy.
rangeing from 200x200 to 1024x768
Any one had this issue before and solved it?
Strange....it seems to work for me as long as the image is not stupid-sized (like 1600x1200 off my digital camera ).....
The screen resolution is 240x320 so that should be fine as an image; you may want a 320x320 image so that it works for landscape too, although I think you have to keep the part of the image you want to the left of the 320 pixel width....
Of course, you could always use something like ThemGenCE to make yourself a theme with the picture(s) you want - that should work....your call
HTH,
Mark.

Nexus one screen: color and white shadow

Does anyone experience a "white shadow" problem on n1's screen?
when i read a document, i notice the margin area is not purely white, but there's "shadow" of text on the right
is this a amoled limitation of is it just me?
I will try to take photo if the explanation is not clear enough
another issue is that i've always found the n1's screen color to have a red hue
same for this, is it just me or do you have similar experiences?
Hey, no red hue but i do sometimes have a 'white shadow effect' which i notice looking at text, such as reading an email [not 100% sure if this is same problem as yours tho].
i was worried that this might be a problem with the screen but its just a fingerprint issue - all you need to do is wipe the screen!!
the finger prints left on the screen were what caused my white shadow, wipe the screen clean and all the text is evenly black.
magic
I have also seen this phenomenon, specifically in the web browser when there is a white background with back text. It doesn't happen all the time, but its fairly visable when it does. Perhaps this is a defective amoled screen issue? Or maybe just amoled screen artifacts.... not sure. Anyone else seen this?
Also this isn't a fingerprint issue, happens on perfectly clean screen.
I have the odd ghost shadows when reading black text on a white background too.
boxmander said:
I have also seen this phenomenon, specifically in the web browser when there is a white background with back text. It doesn't happen all the time, but its fairly visable when it does. Perhaps this is a defective amoled screen issue? Or maybe just amoled screen artifacts.... not sure. Anyone else seen this?
Also this isn't a fingerprint issue, happens on perfectly clean screen.
Click to expand...
Click to collapse
I see this too. I just chalked it up to a byproduct of AMOLED screens or something. Doesn't really bother me and I don't really notice it that much either.
boxmander said:
I have also seen this phenomenon, specifically in the web browser when there is a white background with back text. It doesn't happen all the time, but its fairly visable when it does. Perhaps this is a defective amoled screen issue? Or maybe just amoled screen artifacts.... not sure. Anyone else seen this?
Also this isn't a fingerprint issue, happens on perfectly clean screen.
Click to expand...
Click to collapse
hmm that's strange because i do sometimes have exactly the same problem and can see the problem disappear as i wipe the screen. From my limited knowledge about amoled screens it seems unlikely that the pixels could be experiencing some sort of 'come and go' problem such as this. If someone could put up a picture...
Well for the record this is a very minor issue, I like my N1 a lot, its hardly noticeable. However I am interested in investigating it, and attempting to take pictures of the effect was well, less then fruitful.
It turns out my digital camera doesn't take pictures up close that well, its actually pretty terrible. I was trying to get a screen shot app to try to capture it but the ones on the market are only for root users, and I haven't made the plunge into root, yet.
kiddyfurby said:
another issue is that i've always found the n1's screen color to have a red hue
same for this, is it just me or do you have similar experiences?
Click to expand...
Click to collapse
I have this problem and it's very off-putting.
Does anyone know if it's theoretically possible to calibrate the screen à la a computer monitor to reduce this reddish casting? In greyscale photos all shades have a very noticeable pink tone (not photos taken by the phone's camera).
I'm giving this thread a kick, because I also experience this 'problem' of having (faint but clearly visible) ghost lines or 'white shadow' when viewing small text/objects (Nexus One), especially noticeable in the browser. The weird thing is, it completely disappears when switching to landscape mode. Turning the brightness down worsens the phenomenon.
It is also reported at Google's Android support, sadly I can't report the link because of my newbie restrictions I also found one report of the Desire having this problem.
I would ask felow Nexus owners if they want to turn down their brightness and report if they also see this ghosting in portrait view (i.e. when viewing an article on nytimes.com fully zoomed out), so we can conclude if this is an insoluble AMOLED related issue or an actual screen defect of your phone (RMA/waranty-issue).
I have the text ghost image on white background. I thought it was software issue, but since it disappears in landscape view that might mean its a limitation of the pentile sub pixel layout.
I think this should explain it. It's not really the AMOLED, but how the "pixels" are actually laid out.
arstechnica.com/gadgets/news/2010/03/secrets-of-the-nexus-ones-screen-science-color-and-hacks.ars
I read that this issue doesn't occur in the old Dolphin browser. I don't have my phone with me right now. Can someone try it? I doubt it has anything to do with the pentile subpixel arrangement. I mean if the part of the screen is supposed to be white, the pixel should display white, not grey. Probably a software issue, IMO.
I just checked, shadows on both. It's a screen thing.
My bad. You weren't using the Dolphin HD browser, were you?
Thank for your replies I don't think it is the browser though, the same problem persists in Gmail, Adobe PDF Reader and Documents togo, I suggest you use one of these applications to look at small text on low brightness. It might be a little more noticeable in de browser, but looks like it isn't a pure software issue. Can you confirm this finding?
@voiceunebunu: yes, I've read that, but that article concentrates on text fuzziness etc. because of the PenTile arrangement, but does not mention this 'ghosting-like' effect.
Of course this isn't such a 'big deal': I would rather have my screen calibrated so it doesn't show up al reddish and get a better screen view in daylight, but hey, I knew about those problems before I bought the Nexus, but this one seams to be very sparsely documented on the internet.
This effect reminds me of the first, monochrome LCD-displays, which also had this problem (only 100x times worse), especially if they grew older.
Possible work around?
Hi everyone,
I've found a work around for this!
Cyanogen 6 has a feature called "Render effect" and basically, there are options to change what and how colours are displayed.
The last three "calibrated" seem to be for the Nexus specifically. I've used all three and the "calibrated" and "calibrated (cool)" are my favourite. Both slightly change the colour output.
There is a slight yellow tint over whites. For my screen the ghost lines are greatly reduced (it used to be visible with normal size text and exceptionally bad when zoomed out). Now its only slightly visible when zoomed out!
Hope that helps!

i9000 screen problem

Hi all,
Got the Galaxy S for a month, pretty happy with it. Yesterday, the brightness suddenly gone up. The worst part is the display lost the gradient scaling and it is replaced by colour bands!
Apps like the stock video player for example. Before the video is played, you can see the grey control bar at the bottom covers by a lot of colour bands. The colour of the movie is all washed out as if you were playing it in 8 bit colour mode. Where the same avi played okay before, crystal clear and colour was rich.
Same thing with the charging screen while the phone is off. You can see the colour bands on the grey area of the shadow of the green battery. Just wondering if anyone has the same problem?
Cheers!
Factory reset :d
Tried all that full factory wipe, data reset, flash to different rom. Nothing works
Then your device's probably faulty. replace it.
Pretty certain it is. I took a screenshot of the video player and it looks fine but on the screen, you can still see those colour bands meters away.
I guess this indicates the LCD is faulty.
romhunter said:
I guess this indicates the LCD is faulty.
Click to expand...
Click to collapse
The galaxy s has no LCD its LED
Ive noticed when you slide down that tray from the top, when closing it mine has MANY TIMES switched to full brightness. But simply tapping the brightness button on the multi widget thingy makes it go back to how I want.
evil-doer said:
The galaxy s has no LCD its LED
Ive noticed when you slide down that tray from the top, when closing it mine has MANY TIMES switched to full brightness. But simply tapping the brightness button on the multi widget thingy makes it go back to how I want.
Click to expand...
Click to collapse
Thats because you can adjust the brightness by sliding your finger accross the notification bar.... doesnt work if you have auto brightness ticked...
talboy said:
Thats because you can adjust the brightness by sliding your finger accross the notification bar.... doesnt work if you have auto brightness ticked...
Click to expand...
Click to collapse
I have auto brightness ticked, sliding still works for me
Standard rom btw...
Sent from my GT-I9000 using XDA App
Hi I have the exact same problem! But I didn't notice it before now wen I saw this thread. But all the colours are just fine when I play a vid, it's just the grey controlbar that is by many stripes of different colours, looks like 8bit colour. But when the vid starts playing its just fine, because it gets transparent. Should I get this phone changed, have just had it a couple of weeks.
Sent from my GT-I9000 using XDA App
Hi Radat,
I posted more info in the other forum including some screenshots. http://forums.whirlpool.net.au/forum-replies.cfm?t=1520586
Hope yours okay. I am going to call Samsung tomorrow.
romhunter,
yup, saw the screenshots, looks like quantization problem i.e. that colours are using fewer bits than normal. For example, RGB screen might use 24 bits per pixel, 8 bits per r/g/b colour, the screenshots seem to suggest only 5 or 6 bits per colour.
Hopefully this is just a software glitch, though you said you already tried factory reset / wipe, could it be a loose cable wire somewhere or maybe a problem with the screen to mainboard connector?
talboy said:
Thats because you can adjust the brightness by sliding your finger accross the notification bar.... doesnt work if you have auto brightness ticked...
Click to expand...
Click to collapse
awesome. theres so many little shortcuts like this ive yet to learn. thanks
On my sgs, there is a green colour attached to to the grey colours, I can see it really good when using Screen test app on the gray scale screen, all grey is sort of green!
romhunter said:
Hi all,
Got the Galaxy S for a month, pretty happy with it. Yesterday, the brightness suddenly gone up. The worst part is the display lost the gradient scaling and it is replaced by colour bands!
Cheers!
Click to expand...
Click to collapse
Just got a brand new device. Used it for about an hour, then the exact same thing happened - out of the blue.
Any possible home-front solutions? Having to take it to be serviced is a PITA for me ATM.
Mine definitely seems to have banding in the video player control pane before the video playback starts. Can someone please post a screenshot of how it should be? I haven't seen the banding issue anywhere else except the battery charging indicator when charging the phone when it's turned off. And as far as I remember they were always like that.
So can someone please post a screenshot of how it should be for me to compare.
I have the same problem appeared after upgrading to Froyo. Brightness increased (even it is high in the lowest setting) and color saturation also increased. As a result, i see bandings or lines where a color gradient exist. I added an example photo from "Samsung Apps" page. You can easily see bandings on the bottom. I see such things in a PC screen if color adjustment is not optimum. So there must be a way to adjust screen saturation and brightness by a software through registry i think. It seems like a software problem. I think it is a very rare problem, i found few people on the web complaining about it. Mostly HTC Desire, which use also Samsung Amoled screen, users complaining about it.
I did everything said on forums to solve it but no way. I flashed many different roms both eclair and froyo, use a software given in HTC forums to change RGB color, changed color settings through video player etc. Nothing worked. Please help
victor79 said:
I have the same problem appeared after upgrading to Froyo. Brightness increased (even it is high in the lowest setting) and color saturation also increased. As a result, i see bandings or lines where a color gradient exist. I added an example photo from "Samsung Apps" page. You can easily see bandings on the bottom. I see such things in a PC screen if color adjustment is not optimum. So there must be a way to adjust screen saturation and brightness by a software through registry i think. It seems like a software problem. I think it is a very rare problem, i found few people on the web complaining about it. Mostly HTC Desire, which use also Samsung Amoled screen, users complaining about it.
I did everything said on forums to solve it but no way. I flashed many different roms both eclair and froyo, use a software given in HTC forums to change RGB color, changed color settings through video player etc. Nothing worked. Please help
Click to expand...
Click to collapse
I looked at ur pic. I honestly dont see any problem with it. What is this banding ur talking about?
Sent from my GT-I9000 using XDA App
Bottom of the screen, around "2010 Samsungs Electronics". This part should be a smooth color transition from blue to transparent but there are circular lines between colors. Is your screen the same.
Another example. The one on the phone looks white on the upper part where a color transition from dark to light black exist and there are visible lines. But normally it was looking like the other picture (taken from notebook screen) before this problem
ah on that screen i already see 8 shades of blue, most be around 4k colors .. bummer though, it's normally a software problem, doubt that a conector has come loose. (but possible if it's a pimped up composite plug with Y/Pr/Pb, .. eh still impossible cos it's getting decoded before that)

[Q] MMS small pictures

A mate sent me a picture from his stock HTC one to my stock HTC one today via MMS, and the picture displays as a small image in the middle of the screen rather than full screen, and its not possible to use pinch (or reverse pinch) to zoom into it to make it larger. Is this normal? Seems odd that a picture from an exact same phone only shows as a tiny image and not the same size as taken. I understand that there are network limits on MMS size, but how come the image gets miniaturized rather than still show as full screen?

Xperia SP vertical lines on screen

I noticed this while browsing the play store.. on light backgrounds or where the background is a single colour there is vertical greyish lines on the screen. They are spaced evenly with each line about 1/3 of the width of the space between them.
Someone posted a picture of it here which shows what I'm talking about
http://talk.sonymobile.com/t5/Xperi...isibly-on-bright-white-background/td-p/427227
Is this how the screen is meant to be?
spix123 said:
I noticed this while browsing the play store.. on light backgrounds or where the background is a single colour there is vertical greyish lines on the screen. They are spaced evenly with each line about 1/3 of the width of the space between them.
Someone posted a picture of it here which shows what I'm talking about
http://talk.sonymobile.com/t5/Xperi...isibly-on-bright-white-background/td-p/427227
Is this how the screen is meant to be?
Click to expand...
Click to collapse
This is normal. With my XSP it's the same and I think this is caused by the display and all SP's should have that so don't worry
edit: What I mean with "this is caused by the display" is that I think that under the display is something, that has vertical stripes and because the screen is quite transparent you can see it in a special perspective
spix123 said:
I noticed this while browsing the play store.. on light backgrounds or where the background is a single colour there is vertical greyish lines on the screen. They are spaced evenly with each line about 1/3 of the width of the space between them.
Someone posted a picture of it here which shows what I'm talking about
http://talk.sonymobile.com/t5/Xperi...isibly-on-bright-white-background/td-p/427227
Is this how the screen is meant to be?
Click to expand...
Click to collapse
My phone has it too. I noticed it the first time I powered on the phone. I try very hard to ignore it everytime I see it
Good to know its normal.
I think it may be because of the glove mode feature, like some sensor under the screen that lets you use it without touch.
spix123 said:
Good to know its normal.
I think it may be because of the glove mode feature, like some sensor under the screen that lets you use it without touch.
Click to expand...
Click to collapse
I don't think so. Before I had the SP i had the Xperia P without glove mode and it also had those stripes. Because it got broken I unscrewed it and the display as one had those stripes. Maybe just the touch sensors Whatever, for me it's not a problem ;D
few days ago I bought xperia sp. before buying looked at dozens reviews and non of them was pointing to this problem. I mean that there is visible vertical lines on bright backgrounds. I would never bought sp if knew that. how its possible that this phone is 12 by user rankings in gsmarena? are those users blind????

Categories

Resources