My Nexus 7 (2012 model) display got broken and I've purchased new Full LCD display+Touch Screen Digitizer (from: http://www.aliexpress.com/item/Orig...itizer-for-ASUS-Google-Nexus-7/767556272.html).
Touch screen is working fine, but the display is not working correct.
Problems:
Images is pixelated all the time. Always
Display is not coming properly. Ex: settings screen is supposed to be smooth gray gradient, but coming as color palette (color bars) instead of smooth gradient. (see image 7)
Previous screen is seen next scree. Ex: in settings screen I can see home menu icons (highlighted with red lines)
Sometimes pinkish color is coming, and sometimes whitish tone is coming
I've attached few images I've taken using my Mobile and few screenshots I've taken directly from Nexus 7. In the screenshots you can see the images are pixelated.
Where could be the problem? How does the screen capturing works in Android? I mean as I've taken direct screenshots and those images got pixelated, does that mean problem is with GPU or does Android will capture the image some home from the display?
Can any one tell me how Android screen capture works?
If Android captures what it is sending to display, then the problem is with GPU.
If Android captures the pixels from the display (some how after shown on the screen), then the problem is with LCD.
Can anyone suggest what could be the problem?
(I've attached images as zip file, as direct image upload is lowering the image quality and one may confuse about the actual problem)
Okay, I think I got an answer (or at least part of it).
Answer: Android captures what it is sending to display (technically, from something called FrameBuffer).
So, I think I've problem with GPU connectivity (may be some loose connection?). Can any one confirm?
Reference:
http://www.imajeenyus.com/computer/20130301_android_tablet/android/taking_screenshots.html
http://stackoverflow.com/questions/19270968/how-to-capture-screenshot-from-framebuffer
http://stackoverflow.com/questions/2807070/screenshot-of-the-nexus-one-from-adb
http://superuser.com/questions/265922/how-does-the-print-screen-key-work
https://nativedriver.googlecode.com/files/Screenshot_on_Android_Internals.pdf
Related
I'm not sure whether this is a problem with Android (doubt it), HTC Sense in general or the HTC Photos app..
But what I'm finding is that pictures with gradients (usually ones computer generated) have their gradients shown very bady and makes the picture look terrible. Instead of doing a smooth colour transition, it sort of does it in chunks..
htt p://img441.imageshack. us/img441/7022/img2485n.jpg
As you can see here, isntead of fading smoothly from the red to black, it does those ugly layers. I first noticed it when I had this picture set as the lock screen picture because it does it there too. In bright light its almost impossible to tell, but in the dark it tooks terrible.
Sometimes when I look at the full picture in the Photo app it doesn't do the gradient so badly, but when I go to pinch zoom the slightest it instantly changes to look like that. (isnt just a problem with the one picture btw). I thought it might be something to do with the large picture being resized to fit the screen, but I resized the picture on a computer to be smaller than the screens dimensions and it does the same thing.
Another slight issue I picked up is that black areas in a wallpaper picture don't show as 'true black'. When I view the picture with the black background fullscreen in Photos, the black areas are true black (tested at night - true black of AMOLED screen). But when the picture is set as background, there is a noticeable difference between the blackness of the background and the 'true blackness' of the bottom of the notification bar...
Might be hard to see, but to show what I mean:
htt p://img541.imageshack. us/img541/3236/img2488c.jpg
Does anyone have any explanation for these problems, and even better, fixes?
I've got HTC Legend unrooted
Cheers
Got a Nexus 7 on black Friday. I've used pictures of Serenity, from Firefly, as wallpaper pictures on my Android phones for years. When I tried to use them on the Nexus 7, I kept getting the frustrating cropping issues people keep talking about. I finally sat down this morning and found a solution. The first key is to use an app that doesn't scale the pictures. I'm using "Photo Gallery Live Wallpaper". The next step was to find the right picture dimensions so the picture on the wallpaper matches the picture file resolution exactly. This took some trial and error using pixel grids.
The Nexus 7 screen in portrait mode is 800x1280. The wallpaper picture sits 48 pixels above the bottom of the screen. So a 1232 pixel tall picture sits properly in the screen. Using the default launcher, the notification bar at the top of the screen is 48 pixels tall, and the navigation bar at the bottom of the screen is 64 pixels tall. So, the top 48 and the lower 16 pixels of the wallpaper pictures are covered up. For each of the two pans to the left and to the right of the center home screen, the background image moves 150 pixels. With the center home screen 800 pixels wide, this means that a 1400x1232 pixel image will display properly.
I've made 9 background images this size, and the wallpaper app seems to be cycling through them all properly.
Todd F.
I've noticed some faint diagonal stripes on my LG G2 (LG-D802). They make a pixel like pattern of stripes, only they are diagonal from upper left to lower right and mostly visible on solid clear colors like red, green or blue. The stripes are very thin and the width of the stripes is comparable/or slightly smaller then the pixel width of my old Samsung Galaxy S2 (>200PPI). In other words, it's not something I see all of the time but it gets noticeable when you look closely. And as I said it is mostly visible on solid colors, and not on text and other edges where pixels normally is visible (not that I think this is the actual pixels I see). One of the easiest ways to see it is to search after "red" on google images and open a red image, but it is also visible in most apps or on the homescreen.
Is this something anyone else has experienced/noticed, or is it it my display that is faulty?
I'm not allowed to post an outside link in my message (new user), but here is a picture if anybody want's to see.
It was not easy to capture this on camera, but the stripes are barely visible in the red of the Google+ icon and in the dark blue of the image icon. For size comparison; I use Nova Launcher with icon size 70% and the Minimal UI icon pack.
www[dot]dropbox.com/s/68roby6lgh310y0/DiagonalStripesLGG2.jpg
Could it be a problem with your screen protector? If not i recommend sending it in for a check..
Thanks for the reply.
I don't have any screen protector on, but the lines does seem to be fixed to the screen. I.e. if I move an object the lines does not stick to the object but "new" lines gets visible, so it can look like it can be something with the glass.
If nobody else has experienced the lines I will definitively send the phone in for service.
I tried the local phone store, but the guy only laughed at me because he did'nt see it. Great service attitude when you make the customers feel stupid
Maybe you are talking about the touch sensors?
All the phones have it and it's more visible on xperia phones.
Maybe, but I think the lines/pattern is to small and dense to be the normal grid that people see. When I turn the screen off I can (barely) see the the digitzer grid, but it is a completely different pattern (horizontal and vertical lines) and the lines are separated by several line widths (some millimeters maybe?). The diagonal lines I see are very close together. It looks like they are only a line width apart from each other.
One other thing I just noticed is that the lines does not rotate when the screen is in landscape mode. They still go from the front-camera corner down to the corner to the right of the LG logo.
Is it nobody with a good sight that can confirm if they see the stripes or not? Would have helped me a lot when proceeding with getting the phone in for service.
Hi,
Few days ago I purchased a new unlocked n910f from a nearby retail store and I noticed something strange with the display.
The issue is - vertical lines are visible if a gray image is displayed. This is visible at brightness levels above 50%.
Same can be seen if a white image is displayed (i.e. a white page in Chrome or in Settings) and the notification tray is pulled down so the visible content of the previous screen becomes dim. This problem is really annoying...
I've created an image with photoshop, 2560x1440 with a #2f2f2f Gray and opened it with Gallery.
The display settings are: Screen mode - Basic, Auto adjust screen tone - OFF, Brightness at 100%.
A screenshot doesn't show any vertical lines...
These are links to full sized images:
1. 2560x1440_#2f2f2f_Gray.jpg
http://postimg.org/image/ftr1z57yd/
2. Photos taken with another camera (same image displayed, different camera exposure)
http://postimg.org/image/83q8tluf1/
http://postimg.org/image/rsqvx0bcd/
3. A screenshot
http://postimg.org/image/9o065qs71/
I've searched for this issue on the web and XDA, found about Mura effect, but nobody pointed out this issue on Note 4 and if this can be fixed. Is this issue present on Your device? Should I request a device replacement?
Thanks,
aleksandar.1 said:
Hi,
Few days ago I purchased a new unlocked n910f from a nearby retail store and I noticed something strange with the display.
The issue is - vertical lines are visible if a gray image is displayed. This is visible at brightness levels above 50%.
Same can be seen if a white image is displayed (i.e. a white page in Chrome or in Settings) and the notification tray is pulled down so the visible content of the previous screen becomes dim. This problem is really annoying...
I've created an image with photoshop, 2560x1440 with a #2f2f2f Gray and opened it with Gallery.
The display settings are: Screen mode - Basic, Auto adjust screen tone - OFF, Brightness at 100%.
A screenshot doesn't show any vertical lines...
These are links to full sized images:
1. 2560x1440_#2f2f2f_Gray.jpg
http://postimg.org/image/ftr1z57yd/
2. Photos taken with another camera (same image displayed, different camera exposure)
http://postimg.org/image/83q8tluf1/
http://postimg.org/image/rsqvx0bcd/
3. A screenshot
http://postimg.org/image/9o065qs71/
I've searched for this issue on the web and XDA, found about Mura effect, but nobody pointed out this issue on Note 4 and if this can be fixed. Is this issue present on Your device? Should I request a device replacement?
Thanks,
Click to expand...
Click to collapse
i just tested on my 910F yes i do have some very minor lines (horizontal) on grey but nothing on white backgrounds, you should get a replacement
Greetings all,
I have a S7, and when I have a open white area, lets just go with messages, When I open up the message (text, stock) and compose a new message, I get the white screen however in the background I can see the home screen icon's very faint, with colors. I did a screen shot and when on the phone you can see the icon's, however when I move the screen shot to the PC I dont see any of the icon's, I was hoping to post the pic, but the pic is perfect. I dont know how to explain this, but it weird. I have done two factory wipe's, this is stock, I have not modified this phone. The carrier, (If needed) is T-Mobile. Any and all information will be greatly appreciated.
Ciao~
BH
chargedbird said:
Greetings all,
I have a S7, and when I have a open white area, lets just go with messages, When I open up the message (text, stock) and compose a new message, I get the white screen however in the background I can see the home screen icon's very faint, with colors. I did a screen shot and when on the phone you can see the icon's, however when I move the screen shot to the PC I dont see any of the icon's, I was hoping to post the pic, but the pic is perfect. I dont know how to explain this, but it weird. I have done two factory wipe's, this is stock, I have not modified this phone. The carrier, (If needed) is T-Mobile. Any and all information will be greatly appreciated.
Ciao~
BH
Click to expand...
Click to collapse
If you take a screenshot and it does not display the same as what you are seeing it means it is NOT software related unfortunately this is screen burn
thats what I figured, but its very bad, I have never had any of Samsung Phones every do this. If the display is burned, why would the icon's have color? I see only the background icons, when the screen is white. If it was burned should I see it on all the screens?
chargedbird said:
thats what I figured, but its very bad, I have never had any of Samsung Phones every do this. If the display is burned, why would the icon's have color? I see only the background icons, when the screen is white. If it was burned should I see it on all the screens?
Click to expand...
Click to collapse
The screen burn burns in the colors a possible way to test this is change your background icons from what they were previously and see if the colours have changed on the screen where you can see the burn in..
Alternatively Get a screen test app https://play.google.com/store/apps/details?id=ua.dp.ustav.screentest should let you put solid colors on the screen) and set it for all white (there shouldn't be any other color showing) then for all black (there shouldn't be anything but black or a uniform very dark gray). If either one shows any sort of picture "ghost", the screen has burn-in.
Apparently it helps slightly if you set the screen mode to cinema. (Settings>Display>Screen Mode>Cinema)
Hope this helps