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.

Screen quality Samsung Galaxy S II vs Samsung Galaxy Nexus

Should I wait for ICS for my SGII or switch to Nexus?
I heard the other one is pentile screen
I use LCD Resolution and man the screen in my SGII is the best I've ever used
Which phone has the best screen quality?
Sent from my SPH-D710 using xda premium

rafarataneneces said:
Should I wait for ICS for my SGII or switch to Nexus?
I heard the other one is pentile screen
I use LCD Resolution and man the screen in my SGII is the best I've ever used
Which phone has the best screen quality?
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Galaxy Nexus has a 720p Super Amoled Display, as noted HERE. The Pentile display is on the "Photon"
I would say this device will be neck to neck with the Galaxy Nexus, once we have ICS

no actually cordell12 the galaxy nexus does use pentile.
its the samoled+ displays like taht of our phones that doesnt have pentile

I just compared my e4gt side by side to a nexus and the screen looked the same. I know the nexus has a higher resolution but I couldn't tell from looking.

cordell12 said:
Galaxy Nexus has a 720p Super Amoled Display, as noted HERE. The Pentile display is on the "Photon"
I would say this device will be neck to neck with the Galaxy Nexus, once we have ICS
Click to expand...
Click to collapse
pentile is the subpixel structure of the display. super amoled HD & the photon super lcd both use it. the super amoled subpixels are arranged in such a way that the blue & red are double the thickness of a single subpixel followed by a single green subpixel of regular thickness. the photon is a bit different that it also has a white subpixel alternating with the green subpixel, known as RGBW.
RGB pentile
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RGBW pentile
cporta said:
I just compared my e4gt side by side to a nexus and the screen looked the same. I know the nexus has a higher resolution but I couldn't tell from looking.
Click to expand...
Click to collapse
the one place you will definitely tell the difference is in the web browser. the smaller text will be readable at any zoom level, unlike the sgs2.

The Nexus definitely shows the resolution advantage. Hell, the iphone 4s shows clear benefits with a screen much smaller in size (pixel density is very important as well imo). The overlooked difference between the E4GT and the Nexus is the Samsung vs Google update thing.... doesn't anyone remember waiting tirelessly for Samsung on every device they "support?"
And LTE is ridiculous compared to Sprint 4G in Chicago.

ppcpirate said:
the one place you will definitely tell the difference is in the web browser. the smaller text will be readable at any zoom level, unlike the sgs2.
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Click to collapse
So in theory the Sumer Amoled pentile screen (720p) is better than the one in Samsung Galaxy SII Epic 4G Touch?
Have you seen both phones side by side?
I am afraid because Droid Bionic (piece of crap), had a pentile screen and MAN it was HORRIBLE

One X display puzzle

I was comparing the displays of One X vs Note 2 the other day and was very surprised too see that the display of Note 2 was much sharper! The same image was evidently blurrier and hazily on the One X's screen in comparison to that on the Note 2.
I'm not talking about vibrancy, colour reproduction, true black, true white but simply sharpness.*
I wonder if there is some sort of image processing mechanism built in the default image viewer of Samsung?
Given the size (4.7 vs 5.5), same resolution, higher PPI, true RGB, the SLCD 2 screen of the One X should have been equal or better than Sammy's?
The reason why I got the One X for my girlfriend was because she never likes the over saturated colour of SAMOLED (ie. Sammy S3) and much prefers the natural tone of LCD but looks like when it comes to sharpness there really is no contest.*
I have been a user of Samsung Galaxy line since the S1 and now I have the Note 2 but I absolutely love the screen on the One X, just find it a bit puzzling that the former is sharper while technically it shouldn't be!
This is in no way a troll or a wish to start a flame war or anything like that.

is not logical what ur saying..the big DIFFERENCE BETWEN SUPER AMOLED(Pentile) and HTC LCD2 is that the HTC ONE X is more sharper so is better
look at the difference between pixels
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nemer12 said:
is not logical what ur saying..the big DIFFERENCE BETWEN SUPER AMOLED(Pentile) and HTC LCD2 is that the HTC ONE X is more sharper so is better
look at the difference between pixels
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Click to collapse
Dude, the note 2 ain't using a pentile screen, nor an RGB stripe. Its weird.
Sent from my faster than SGS3 HOX.

still LCD can reproduce images better and sharper..the thing with LED is that they are more " stable " and the colors are very " alive "..and thats a thing that I hate.

The note 2 is using the IPS OLED display. I find the note 2 screen overall less sharp than the One X. However, there may be cases where the note 2 may appear as if it was sharper, especially when looking at dark/black images. That's due to the more punchy color of the note 2. When looking at texts and in general I find the One X has sharper and overall better display.
Sent from my HTC One X using xda app-developers app

[Q] About those viewing angles...

Hi to all
I'm pretty new to the tablet market and I just bought the note 10.1 2014. I'm in my first 14 days where I can exchange/return my tablet and I want to make sure everything is ok with my stuff.
I've read countless online reviews before making my choice and, as you all know, one of the strongest aspect of the note 10.1 2014 is the display. Most if not everybody is praising the resolution, the colors, minimal color shifting, brightness and the viewing angles. Now, I want to make sure my understanding of lcd displays/viewing angles is good.
My tablet's display is gorgeous... when I look at it straight at it. I have the minimal light bleed on the edge which only shows on black and has 0 impact on colors which I'm ok with (all demos in stores are the same so...) As soon as I tilt the tablet though (vertically or horizontally), colors become very dull. Actually, colors do not shift but everything becomes dimmer/duller. Now, I suspect this is normal behavior from a backlit LCD but still, I keep reading reviews stating the display is gorgeous and bright even from an angle which is not 100% right for mine. I've tried to look at videos/pictures online but most people doing reviews actually setup a camera right in front of the tablet and barely move it once it's turned on so it's not helping me. So when you guys are saying the tablet's display stays vivid and colorful from every angle, are you getting the same kind of behavior my tablet has and are not talking about this because this is normal behavior for an LCD display or is my tablet's display defective?
Thank you very much in advance for your cooperation. If needed, I could take pictures.

Merranza said:
Now, I suspect this is normal behavior from a backlit LCD but still, I keep reading reviews stating the display is gorgeous and bright even from an angle which is not 100% right for mine.
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As is typical of the Samsung displays, the viewing angle stability is great. The colors remain stable regardless of the viewing angle and we did not note any great loss in brightness.
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http://www.notebookcheck.net/Review-Samsung-Galaxy-Note-10-1-2014-Edition-Tablet.106669.0.html​

Thank you very much for your reply. Well, I guess my tablet's screen is pretty similar to the test unit provided in the review. My definition of stable brightness and colors is pretty different from the behavior of that display But to know my screen behaves normally compared to other tablets is good to know.

Just enjoy this tablet..Don't spend hours looking for problems that arent there. This tablet is wonderful , I have had mine since December with no issues at all. I'm rooted with tons of stuff on mine. Most of the problems I have been reading about are people with way too much time on their hands. Have a beer , and love your tablet!!
Sent from my SM-P600 using XDA Premium HD app

Don't get me wrong here, maybe I did put too much emphasis on the display and I'm sorry about this. I love my tablet too. I'm just discovering the power of the tablet and the S-Pen, the integration is pretty amazing.
Cheers

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.