Develop Bugs

AMOLED and Themes - important note

Important to all theme developers and users to read before making/downloading themes.
http://www.scribd.com/doc/42669045/4D-AMOLED-Presentation
Green is the best at 40K hours, Red is 25K and Blue is 12K hours = Conclusion that green themes is best of the best for AMOLED like Jumba's NeonGT was. Someone should save Jumbas theme who has skills to rebuild neonGT because it was almost complete green and very easy to eyes.

Nice info
It would be really useful for Theme developers/moders
Sent from my JVH_DeOdex~®Voodoo--I9000 using Tapa

Ok, the blue pixels have"only" 12k hours until the brightness will decrease to a certain value. Did you even took the time to calculate what 12k hours means for a phone with an average of 4 hours of screen on per day? ... The answer is .... about 10 years. I wonder how many amoled displays from today will still exists then.
Later edit: not to mention that the respective document is from 2008.

i'd say black is even better

Jossilint is right. I had a samsung wave before i bought galaxy s. Most icons were blue and white in top bar. After a couple of months you could see the shape of the icons in fullscreen mode, especially on blue or grey backgrounds.
So you can notice when blue led's are getting older.

AMOLEDs have improved a lot since that article was posted. Infact, the rated lifetime of the AMOLED pixels actually indicates the time after which the intensity of the light emitted will be degraded, but not totally gone dead. We know that Blue degrades faster, so if you happen to see the screen showing more of Green and Red and comparatively lesser blue, it would be a good time to get your screen replaced.
And coming to my personal preference, If I manage to use my phone for around 2 years or more and start seeing these issues, I would definitely pay for a new screen. Just because I love the screen..

i think most people will never notice decreased brightness of blue oleds. only in top bar, when you use the same blue or white icons at same position over months. even then it is only slightly visible, but it is.
i'm not the only one reporting it. i've seen a couple of wave users in forums with similar effects. and wave is using exactly the same display, only size is smaller.

Nice info !
Thanks for sharing

here's the proof:
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Black Android all the way hahahah

pele78 said:
Black Android all the way hahahah
Click to expand...
Click to collapse
Yes but not with greywhite text (rgb all in use) but with green or red green mixed. I have readed lot of xda SGS burn in horror stories even after couple month(i assume max brightness used) and i am sure that this degraded light was blue.

I think you guys are overreacting. You'll end by NOT using your phone because you will always look not to burn the display. You'll NOT enjoy the beautiful colors and teh extraordinary contrast because of the same reason.
WTF? ... we are talking about a device that was built to entertain us, not to spend neurons in figuring out how not to do things with it.
Just my 2 cents.

ro_explorer said:
I think you guys are overreacting. You'll end by NOT using your phone because you will always look not to burn the display. You'll NOT enjoy the beautiful colors and teh extraordinary contrast because of the same reason.
WTF? ... we are talking about a device that was built to entertain us, not to spend neurons in figuring out how not to do things with it.
Just my 2 cents.
Click to expand...
Click to collapse
You can enjoy, just change habits a bit like not giving max brightness in sun(just use better angle and medium is ok). SGS is not meant for hours of navigation in car this will kill most fastest, use TomTom or some other lcd based phone, SGS is good for quick navigation. SGS is perfect for darkness because AMOLED has no light leak like lcd and has best colors.

SGS is good to be used with whatever application you want and in any way you want. To change habits because I have an AMOLED display will mean to change habits because of a device instead of changing a device because of my habits.
Is like the old saying: "are you living to eat or are you eating to live?" Everything is a matter of perspective.
I consider myself more important than a device ... so I'll use that device to my satisfaction, not the other way around.
So please ... use the SGS to enjoy what you're doing. When the SGS will die (no matter if is the screen, the battery or whatever) you can always get a new one .

[Q] Would this qualify as defective?

My screen shows banding on screens with gradients, like the call log screen, or screens with certain colors, like when I'm playing wordfeud. Even when I'm browsing the white background has faint horizontal and vertical lines.
All of this is only visible when on the lowest brightness setting. So when I'm browsing in bed at night etc it's really annoying.
I went to the (3) store here in denmark, but because it was a well lit room, the problem was barely visible and they said they'd have to send it in for "assesment", and best if i could come back in January and send it in (for 2-3 weeks). I'm just afraid they'll just return it with "problem not found"
I DID manage to report the problem to them on the 14th day after i bought it, their own DOA limit, but I've got a feeling I'm going to get screwed. Especially because the in store phone ALSO seemed to show the same color banding on the call log background.
I've tried taking some pictures that maximize the problem here: http://imgur.com/a/CbKYi#9
Are you guys seeing the same thing on any of your devices?
I love the phone to death otherwise, but it's like a scratch on a brand new car, it's annoying me a LOT.

unfortunately, that's just how they all are. has to do with the display type. both of the nexus' i've had were the same way, as was the display unit in my local verizon store.

vman81 said:
Even when I'm browsing the white background has faint horizontal and vertical lines.
All of this is only visible when on the lowest brightness setting. So when I'm browsing in bed at night etc it's really annoying.
Click to expand...
Click to collapse
You aren't seeing "banding" in the traditional screwed up screen sense, you're seeing the back of the display. I think it's just part of being SAMOLED and Pentile. I never noticed it until I started reading all the threads about people complaining over "banding" (and I don't think you're complaining LOL ).
Bump it up from the dimmest setting just a bit and most of it will go away. Our dimmest setting is REALLY good, at least compared to my old SGS. I also like how are screens don't have that SGS SAMOLED blue tint to them.

KWKSLVR said:
You aren't seeing "banding" in the traditional screwed up screen sense, you're seeing the back of the display. I think it's just part of being SAMOLED and Pentile. I never noticed it until I started reading all the threads about people complaining over "banding" (and I don't think you're complaining LOL ).
Click to expand...
Click to collapse
This image clearly shows banding and not the grainy display BG:
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go to that call log screen again and press vol down + power. then look at the screen shot on the computer.
it looks the same
the background is ment to look like that

All 4 phones and 7 models that I've gotten to use from Samsung have this problem.
SAMOLED just isn't very good yet.
Sent from my SGH-I897

happy to hear my phone is not defective, but then again im very disappointed that this is a quality issue with the phone.
I read tons off aritcles discussing the difference between Super AMOLED and Super AMOLED plus (pentile and RGB) and this forum probably did the best job of explaining it
now is this also the reason why whites arent really white while having hte phone in auto brighntess? is the screen is dim, my "people" app is not white, actually far from it. but when the brightness is maxed out it looks magnificent

danibravo said:
happy to hear my phone is not defective, but then again im very disappointed that this is a quality issue with the phone.
I read tons off aritcles discussing the difference between Super AMOLED and Super AMOLED plus (pentile and RGB) and this forum probably did the best job of explaining it
now is this also the reason why whites arent really white while having hte phone in auto brighntess? is the screen is dim, my "people" app is not white, actually far from it. but when the brightness is maxed out it looks magnificent
Click to expand...
Click to collapse
I was disappointed by the screen quality at first too, but the more I use the phone the less I notice it. I've even started to really like other aspects of the display that were lacking in other phones with a "clean" screen. Colors are much more vibrant for one, this is very visible when watching videos on the phone when I'm at the gym.

Bluetooth Thermal Imaging addon Prototype

Hi everyone!
I've had some time to play around with the Prototype of the BT Thermal Imaging Addon for Android phones.
The Hardware and Software was designed by XDA Member "Mardaso", you can read about the begiinigs of the project in this thread.
Mardaso kindly sent me a prototype and allowed me access to the latest beta app for testing purposes.
I will attempt to show you what this device can do.
First some facts:
The Far Infrared Sensor built into this device is a Melexis MLX90620 16x4 Pixel Thermopile Array. It is a low resolution and low cost sensor. Despite the low resolution it is actually quite useful, 64 FIR Pixels can show up leaks around Windows and doors, find cold and hot spots and let you find your dog in the dark, especially in winter when the warm-blooded creature shines like a beacon...
A Model with two Sensors, doubling the resolution and giving you and aspect ratio of 16:8, is possible and might be available in the future. a trial run with a dual-sensor setup was succesful.
The device is currently powered by 3 AAA batteries, but newer prototypes work with 2 AAA batteries, making the unit smaller and lighter. The current revision uses BT 2.1, but the final device will be dual-mode BT with 4.0 support for future proofing and iPhone compatibility.
The Android App is currently pretty basic, offering Camera Overlay, framerates from 1-8Hz, Automatic or manual Temperature scales, Ironbow or RGB Color display and Screenshot capability.
I tested this with my Galaxy Nexus running Android 4.2.2 and it works quite well, a few bugs are still there, but they should be mostly solved by
the time this hits Google Play
So, let's look at some pictures:
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This is the current Prototype device, it's size and shape are far from final. The black thing next to it is the pouch for my Nexus. I attached the Sensor to my Nexus with a piece of Pugoo pad, this works really well.
This is my dog in TI vision. The resolution is no good enough for details. but still quite impressive for such a low-priced sensor.
This shows the real usefulness. You can clearly see how much warmth is radiated out through the old, double glazed wooden windows. The Yellow area does not quite match the windows area, this is due to the fact, that the sensor is not perfectly aligned with the Nexus camera. This should improve in newer revisions of the sensor and app.
This is a new and well insulated house, plastic windows with triple glazing. Windows, door and wall are mostly the same temperature.
Here you can see, that deven in a well insulated house there are warm and cold spots. This is the same door you saw above, but from the inside. To make the temperature differences visible I had to set the max and min temperatures by hand. Difference from warmest to coldest spot are minimal.
Last image for today: My dog at night with thermal overlay.
OK, this is just a start and a first impression. I'm planning to do more pictures, for example of the inside of my PC.
If you've got special wishes or questions, just ask and I'll try to answer.
Thanks for reading, I look forward to hearing your opinions and suggestions!

UPDATE:
I finally had some time to do a few more tests.
This shows that the CPU cooler is a lot...cooler than the VC chips next to the CPU socket.
This shot shows the GPU producing plenty of heat despite being idle
The "traditional" HDD gets a bit warm while the SSD keeps it's cool (hard to see on the picture, I know)
The temperature stays a lot cooler than the GPU and the VCs though...
And last but not least, here you can see that the case fan does it's job and blows the hot air out of the back of the case.
I hope you liked this little preview-review. Sadly there have been no responses so far, if anyone has questions, don't be shy to ask...

Thanks for the update!
See you having fun with the sensor.

Good work! I am currently trying to program my own interface with the MLX90620 but the 16Hz output doesn't look as good as yours - in fact, it's very noisy. Did you do some filtering or use a lower refresh-rate?
Also, how did you get the higher resolution? Interpolation?

@chnaideur:
I use 4Hz as a standard and 8Hz as a maximum at the moment.
The data is "noisy" because of the small temperature changes the sensor can detect.
In the last Android software I use a threshold between 0.5 to 1 degree Celsius to get a better picture.
Thus to filter out the noise.
The higher resolution is achieved by interpolation.

I remember following this project a ways back. Glad its came to fruition. Keep up the great work guys. Very interested in this.....STILL
Sent from my SCH-I605 using Tapatalk 2

availability?
This is a great add on device. Are there any updates on its development or availability?

vitamindee said:
This is a great add on device. Are there any updates on its development or availability?
Click to expand...
Click to collapse
Hi,
why don't you send a PM to mardaso, he has built several versions and is selling them in Europe. Last I heard he was working on a USB-OTG Version.
If you live in the US you could get one of the "IR-Blue" devices that were up on Kickstarter. They are made for iOS Devices, but there is a free app by mardaso on the Playstore that should work fine with them.

Contrast (true blacks)

How well do you know your fifty shades of grey? Rate this thread to express how good the ZTE Axon 7's display contrast is. A higher rating indicates that black is true black, rather than a very dark gray.
Then, drop a comment if you have anything to add!

I am coming from an amoled screen, yet I am amazed at how black the black is on the a7. Using tbo Blacked Out apps are a no brainer.
Sent from my ZTE A2017U using XDA-Developers mobile app

It's an Amoled screen, meaning the pixels are off when displaying black. The blacks are...black.

What are the best color accuracy settings for the display?

I'll go against the grain and say I'm mildy disappointed in the Axon 7's blacks. Vividness and high contrast are appealing to the eye, but so much detail is lost.
http://www.lagom.nl/lcd-test/black.php
Above is a series of tests I use on all my displays. My TV and PC monitor are calibrated to have every black box visible on the above test. My Nexus 5 phone has all but the last box visible. My Axon 7 on the other hand loses six boxes which blend into the background.
I honestly don't think this is a limitation of AMOLED hardware but likely the software configuration. I would be happy if ZTE released an sRGB calibration tool like OnePlus did for their OnePlus 3.
You can watch night scenes from The Dark Knight, B v S, Zero Dark Thirty, etc and really notice how much dark detail you're losing on the Axon 7.
I specifically remember a B v S scene where Batman is in his jet fighting Doomsday. A shot of Batman in his cockpit looks near completely black on the Axon: you lose all the detail of his cowl/mask, and the inside of the cockpit.
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jlomein said:
I'll go against the grain and say I'm mildy disappointed in the Axon 7's blacks. Vividness and high contrast are appealing to the eye, but so much detail is lost.
http://www.lagom.nl/lcd-test/black.php
Above is a series of tests I use on all my displays. My TV and PC monitor are calibrated to have every black box visible on the above test. My Nexus 5 phone has all but the last box visible. My Axon 7 on the other hand loses six boxes which blend into the background.
I honestly don't think this is a limitation of AMOLED hardware but likely the software configuration. I would be happy if ZTE released an sRGB calibration tool like OnePlus did for their OnePlus 3.
You can watch night scenes from The Dark Knight, B v S, Zero Dark Thirty, etc and really notice how much dark detail you're losing on the Axon 7.
I specifically remember a B v S scene where Batman is in his jet fighting Doomsday. A shot of Batman in his cockpit looks near completely black on the Axon: you lose all the detail of his cowl/mask, and the inside of the cockpit.
Click to expand...
Click to collapse
Seriously? You used an LCD test for an AMOLED panel? No wonder your results don't make sense at all

bkores said:
Seriously? You used an LCD test for an AMOLED panel? No wonder your results don't make sense at all
Click to expand...
Click to collapse
Your judgement is misguided. The blacks test on the link I provided was not designed for any specific display technology. It says LCD test because it was posted online before AMOLED existed. It shows how the TV salesman trend of pumping up contrast, vividness, and saturation creates deficiencies in picture accuracy.
https://community.zteusa.com/thread/12745
On ZTE community there are several members who observed the same. It's especially noticeable to professionals in film, TV, and photography who are used to having colour/tone accurate displays.

If you put brightness to the max, you will see all the squares. With default brightness, near to the minimum, I lose 4-5 boxes (the first row).
That test is brightness dependent.
Ah, and I did it without the ambient being dark.

Filiprino said:
If you put brightness to the max, you will see all the squares. With default brightness, near to the minimum, I lose 4-5 boxes (the first row).
That test is brightness dependent.
Ah, and I did it without the ambient being dark.
Click to expand...
Click to collapse
For my Axon 7 I don't get the same results: on 100% brightness I still don't see the six boxes in a dark environment. Changing the brightness on this phone has no effect on contrast or gamma.

Question Screen battery consumption

I'm running the Xiaomi.eu rom on my Poco F5, and have noticed that the display is consuming quite a large chunk of my battery life on each charge. Please see the screenshot below. It corresponds to roughly 2.4 mAh per minute of screen on time.
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I just wanted to ask if this is to be expected or is out of the normal. This is quite new for me since I never saw such large battery consumption from the display on my last phone, which was a Xiaomi Mi 5s.
For your information, I'm using dark mode, static wallpaper, 60 Hz refresh rate, auto brightness enabled, and screen set to sleep after 30 s of inactivity.

Displays typically can use a lot of battery especially with high brightness levels.
Switch brightness control to manual and use at 20-40% brightness. Avoid using in direct sunlight as it's not good for it anyway.
Play with the refresh rate options.
Since it's a AMOLED display every pixel that's black or a darker color means less current used.
Use dark mode, and use minimalist icons.

@blackhawk - Thanks for your suggestions! For what it's worth, I fixed the brightness at about 30% for an entire day, and the screen battery consumption hasn't really changed much. It's still hovering around 2.4 mAh per minute of screen on time. The screen refresh rate is set to 60 Hz; the lowest it can be set at.

ragnaroknroll said:
@blackhawk - Thanks for your suggestions! For what it's worth, I fixed the brightness at about 30% for an entire day, and the screen battery consumption hasn't really changed much. It's still hovering around 2.4 mAh per minute of screen on time. The screen refresh rate is set to 60 Hz; the lowest it can be set at.
Click to expand...
Click to collapse
My display on my N10+ is set around 30% and it's consuming 28% of the total battery consumption. It's hard for me to calculate it's actual mAh usage unless I charge to 100% which I almost never do.
Regardless other than changing the brightness manually and in your case playing with the refresh rate settings there's not much else you can do other than optimizing the display content.
This is my homepage setup.

Thanks for sending over these screenshots! Your 28% screen battery consumption is almost exactly the same as mine, which likely indicates nothing untoward is going on in my phone. That comes as quite a relief.
PS: Am loving the minimalism of your home screen.

ragnaroknroll said:
Thanks for sending over these screenshots! Your 28% screen battery consumption is almost exactly the same as mine, which likely indicates nothing untoward is going on in my phone. That comes as quite a relief.
PS: Am loving the minimalism of your home screen.
Click to expand...
Click to collapse
You're welcome.
For a variable refresh rate display that's as much as you could hope for. For what it's doing that's not a bad number at all.
That's a stock N10+ and most of those mods are Samsung including the icon pack with the exception of Digi Clock and Energy Ring. Too bad Samsung is so screwed up now... so I keep running these.

I don't have the screen on time on my Poco F5, guess on Xiaomi.eu they brought it back..

blackhawk said:
You're welcome.
For a variable refresh rate display that's as much as you could hope for. For what it's doing that's not a bad number at all.
That's a stock N10+ and most of those mods are Samsung including the icon pack with the exception of Digi Clock and Energy Ring. Too bad Samsung is so screwed up now... so I keep running these.
Click to expand...
Click to collapse
Don't know too much about Samsung phones. Why do you say they are screwed up?

ragnaroknroll said:
Don't know too much about Samsung phones. Why do you say they are screwed up?
Click to expand...
Click to collapse
No expandable storage now in their flagships. The S23U is thicker, 30 gm heavier than the N10+ and the gets worst SOT... it's a long list.