Develop Bugs

[PIC] SLCD vs AMOLED

Here is a small picture to give you some information about the differences between SLCD and AMOLED. The AMOLED phone is mine and the SLCD phone is my friend's. Both use identical wallpaper and are set to 100% brightness.
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Picture taken with Canon EOS 5D - Tamron f/2.8 28-75mm - ISO400 - F/5 - 1/80s - in poor lighting conditions
Contrast and saturation of the SLCD screen was terrible compared to the AMOLED phone. It was actually even worse than what it looks like in the picture.
We didn't do any real testing, just this quick photo. Hope it's some use for someone.

I've found it quite interesting reading about this as I bought my Desire second hand today and wondered which I have.
Its on orange so there is no specification on the box as its plastered with orange stuff lol, but i'm pretty sure I have AMOLED from what I have read.
I watched a video where when using the camera in the dark with an SLCD display, you can see an awful lot of backlight bleeding around the edges of the screen so the camera image on the display doesn't look totally black if that makes sense. Have you tried that with your friends?

Oh yes. I haven't witnessed it myself but my friend said the screen has lot's of backlight bleeding. He said he noticed it the moment he turned the phone on for the first time. My AMOLED version doesn't seem to have any kind of backlight bleeding as far as I can tell.

Iv used both types f screens and i heard 50% of people say slcd is better, but when i used them that wasn't the case, the amoled was better...

No neither does mine. I think if i'm correct in what I have read (i'm still learning lol), AMOLED is not back lit as its LED unlike LCD displays.
I've gone in to bootloader, if thats the correct term (hold volume button down and switch on), and my device is dated march 2010 so I guess that would quite confidently confirm my device has an AMOLED display as I believe HTC have only started using SLCD displays recently?
EDIT: Just read through this thread discussing it here but no comparrison pics
http://forum.xda-developers.com/showthread.php?t=777796

I have the SLCD version and I am quite pleased that I did. In the store when looking for phones I was a bit disappointed with the way small fonts looked on the amoled screen, the fonts looked very smudges or dirty on the edges whereas SLCD look crisp and sharp (also on the amoled screen I can make out individual subpixels whereas I can't on the SLCD screen). Maybe the amoled version has brighter colors or a blacker black but in everyday use (well when you use it to read text anyway) the SLCD screen is superior.

Simple image test for One X users

I need a One X user to look at this chart and tell me where the One X display falls on the gamma curve (its not a contest so dont embellish numbers, it just tells you what the gamma is set at). The One X display is known as being the best so Im wondering what they set the gamma to.
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To use this chart zoom in enough so the lines arent garbled, blur your eyes and reply with the number value of where the grays blend in with each other the most (it doesnt have to be a perfect blend). You must zoom in enough so the lines arent being blurred together by the software, you need to bea able to see that there is a pure white line and a black line. My guess is the One X is around 2.0 and 2.2.

Here are some AnandTech display figures that may be of interest:
http://www.anandtech.com/Gallery/Album/1926#3
The HOX uses 3 different screens so results may vary according to which screen is in the unit.

I'm not sure if I understood correctly how to test. I'm supposed to look for the square which is closest in colour to the lines on the outside, right? I'd say it's around 1.2, though I have no idea which is better

asp2010 said:
I'm not sure if I understood correctly how to test. I'm supposed to look for the square which is closest in colour to the lines on the outside, right? I'd say it's around 1.2, though I have no idea which is better
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Same here. 1.2
Sent from my HTC One X using xda premium

1.2 here too. My screen is a brighter yellower one
Sent from my HTC One X using xda premium

asp2010 said:
I'm not sure if I understood correctly how to test. I'm supposed to look for the square which is closest in colour to the lines on the outside, right? I'd say it's around 1.2, though I have no idea which is better
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yes but you must zoom in close enough to the image so that the lines can be seen without being jumbled together. If you look at it zoomed out then it doesnt work. The lines are just black and white, when you blur your eyes they create true 50% gray so it is important that the image is zoomed in enough that the phone doesnt blur the lines together itself, the plain gray square that matches up with the lines will tell you what gamma the screen is set to.

Slightly less than 1.2

i just zoomed in on the pc and the lines are all black and white...

For me its 1.2 too..
Tryed outside with 100% backlight and indoors with minimal backlight..
Sent from my HTC One X using xda premium

Would you keep or return a replacement phone if it took pictures like this?

The scene is a picture, at night, with a single compact florescent light bulb in the background, which has a warm tint to it, and the object is a black on white bed sheet. This is my second e4gt replacement. In daylight, I don't notice any color artifacts yet. Here's an example of no flash, flash and daylight cloud. Would you return it, hoping for a "perfect" replacement or say to hell with it and keep it? It must be a hardware issue because it does the same thing with FL24 and GB27. I never noticed this from my original, bought brand new, e4gt. The first replacement, the external speaker went out. The second, the camera is making a greenish tinge, always in the center of the picture, in low light but no scene setting. When I go outside at night and put the camera into night mode, I don't notice anything abnormal so far.
Something I just noticed while playing with the settings and modes. If I leave white balance in auto or incandescent, I get the discoloration in the camera. It is less pronounced in camcorder mode. It does it in all resolutions in the camera. If I switch the white balance to florescent, everything balances out, even though it's the wrong shade. It's more orange-ish than what my eyes see. Can anyone test this and see if your original, bought new, phone does this? I tried taking the same picture with a different smartphone, all with auto settings, and it didn't experience this issue. I'm sure it could be that it's because it's a different sensor. Here's my examples.
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Try turning on Auto contrast, it fixed some odd discoloration problems for me, might work for you:beer:
Slithering from the nether regions of a twisted mind and tarnished soul

oscarthegrouch said:
Can anyone test this and see if your original, bought new, phone does this?
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My E4GT does not do this, I tried in all different resolutions and settings and everything came out perfectly normal and as it should be. No discoloration or artifacts... I'd wager to say that you should exchange it or return it and get another one. Something is definitely not right about that first picture. Hopefully that helps. Cheers!

Did a little homework and found the camera module is replaceable. I don't remember if I read if the camera's firmware was on the mother board or on the module itself. The post I read had to do with s2's in general. I'll go Monday and see if the service center will order me a new camera module.

[Q] Yellowish tint near bottom of the screen

I just picked up a 2013 Nexus 7 this weekend as an upgrade for my 2012 model. Seems like a solid upgrade so far but I'm bothered by one item and it's the yellowish gradient toward the bottom one or two inches of the screen. I need to tilt the device maybe 15 degrees away from me to get a more consistent color. If I rotate the device 90 degrees counter-clockwise (camera now on the left), I can still see the yellowish darkening on light screens on the right. My 2012 model has consistent color throughout. I found a number of posts regarding people complaining of about a warmer color to the 2013 screen but haven't seen anything describing the gradient I see. It's rather annoying when reading webpages or ebooks with a light background.
Anyone else see this on their Nexus? Did it improve with time?
I tried to take a couple of photos but my camera doesn't seem to be doing a good job of picking up the colors.

Common issue
I returned mine (because of it) and got a new one which had exactly the same thing.
I also checked out a friend's N7 and had the same thing.
So I guess it is a normal thing. It is hardly noticeable and only on white background.
(Most panels have some kind of uniformity issues. I checked an iPad 3 and had some other issues...)

antypas said:
I returned mine (because of it) and got a new one which had exactly the same thing.
I also checked out a friend's N7 and had the same thing.
So I guess it is a normal thing. It is hardly noticeable and only on white background.
(Most panels have some kind of uniformity issues. I checked an iPad 3 and had some other issues...)
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Thanks for the feedback. This is actually driving me nuts and I'm going to take it back to see if I can get one with at least less of the effect. Mine seems to be worse than the display model in the store I saw today. If they can't give me something that's equivalent in color consistency to my 2012 Nexus 7 then I'll return it and just stick with that.

If I were you I wouldn't bother.
In the store there are other ambient factors that may trick you in believing the store's sample is batter. But it will not.
3 samples I checked are exactly the same...

My device have yellow tint to. How to fix? "Screen adjuster" and other not helped for me.
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I don't believe that this is correctable with software. I ended up getting a different tablet altogether and even this 10" one has the same issue. Guessing these panels are all coming from the same manufacturer....

Does anyone has a pixel C without purple Blur when scrolling?

Hello I have received my third pixel c.
I had to RMA the forst two, because the on/off button was broken, and the second one becase the sensons wre not working as expècted.
The three devices had a thing in common, a terrible purple blur when srolling, for example white text over a black background. I've wrote in this forum and it semms thta are devices that do not have this issue. Now i'm not sure if there is any pixel c arround the world without this screen issue.
Attached two pictures from a médium quality screen (galaxy tab A, 200 €) and the pixel C (500€). The pictures has been taken from testufo.com/#test=stutter&demo=smooth&foreground=FFFFFF&background=000000&max=12&pps=1920, with an LG G3,
where the purple Blur is obvious.
Could anyone test the link provided above and tell me if you could see the white/gray line instead of a white/purple?
I dont know if i should RMA the third pixel C or this is something bad with this screen.
Pixel C
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Samsung Galaxy Tab A

The pixel c I ordered about 3 weeks ago had the same problem with the screen. I RMAed it and the replacement has the problem too. I've requested a replacement for that one too. My Nexus 10 is fine. The rep I talked with (John?) said he had not dealt with any other customer besides me that had the problem and assured me that it was indeed a defect. I'm not convinced...

I'm using the stutters and tearing test (I believe that's the one you're using, right?) and while the bars do look purple while moving, screenshots show that they are in fact white.

So I tried that test and I do see a very slight purple tint, I recorded the screen with the 240fps slo-mo mode on my Nexus 6P and I see it there too.
It's so slight that I honestly don't care if it's actually a problem or not. Everything else about this screen impresses me enough.

Thanks for answering. I have talked again with google and they are going to send me another one. As i could not test the device in the first 15 days they are not going to give my money back. Again they answer me also that this issue was new for them and has never been reported by any customer.
Could anybody post an photo showing that a pixel c screen without this defect exists?
The is also a test i am doing and is the vsynctester dot com. The VSYNC letters should be grey and this screen shows them as light pink.
Regards

brando56894 said:
[] look purple while moving, screenshots show that they are in fact white.
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Because it's a screen related issue and not the gpu. You can only capture it, if you take a photo from the screen with another device

Termynat0r said:
Because it's a screen related issue and not the gpu. You can only capture it, if you take a photo from the screen with another device
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Makes sense, then I guess mine has it too but I never notice it in daily usage. I just assumed it was an optical illusion.