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Hey everyone,
i have an interesting question about hd7 LCD: are the pixels black or white when voltage is applied? In a "normally white" LCD, the screen will be white if no voltage is applied to any of the pixels. In contrast, a "normally black" LCD will be black if no voltage is applied.
Does anyone know which mode of operation HD7 use? Is it a function of being TN+Film, P/MVA, or IPS? it would just be nice to know.
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Magpir said:
Hey everyone,
i have an interesting question about hd7 LCD: are the pixels black or white when voltage is applied? In a "normally white" LCD, the screen will be white if no voltage is applied to any of the pixels. In contrast, a "normally black" LCD will be black if no voltage is applied.
Does anyone know which mode of operation HD7 use? Is it a function of being TN+Film, P/MVA, or IPS? it would just be nice to know.
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Just curious byt why would this be important ?
are you applying that because of so...the light or dark theme might be more suitable..depending ?
backlashsid said:
Just curious byt why would this be important ?
are you applying that because of so...the light or dark theme might be more suitable..depending ?
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many factors . HD7 seems to use a TN + film display . Unlike the iphone 3GS which is using IPS LCD
1) battery life
in Normally "white" LCDs , no power is applied to display white, Black consumes power
in Normally "black" LCDs , no power is applied to display black, White consumes power
2) Screen protectors
I have no concrete research on this but certain screen protectors for wp7 phone may display better with white theme/ black text because screen protectors with a textured matt screen tend to blur white text. Like wise the opposite is true for screen protectors which are non anti glare
3) longevity of screen
of course when no power is applied to the screen for display of white or black , yr screen is less likely to burn out faster
I had HTC 7 Pro and now Titan. Both SLCDs, as I assume the HD7 is also. When I had the 7 Pro I looked in to this and got the impression white would be the correct answer here. I looked in to this because of the theoretical battery save. I never tested what is the real difference though.
On amoled screen the natural state would be black.
Loco5150 said:
I had HTC 7 Pro and now Titan. Both SLCDs, as I assume the HD7 is also. When I had the 7 Pro I looked in to this and got the impression white would be the correct answer here. I looked in to this because of the theoretical battery save. I never tested what is the real difference though.
On amoled screen the natural state would be black.
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I believe TN display and SLCD is different
SLCD is more power efficient, has deeper blacks and contrast and it has a few types like IPS , ect
Magpir said:
I believe TN display and SLCD is different
SLCD is more power efficient, has deeper blacks and contrast and it has a few types like IPS , ect
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Yes you are correct. I was on my mobile yesterday and didnt look up what panel HD7 has, I only assumed it is the same as 7Pro and Titan, but its not.
Only the trophy and HTC titan/ titan 2 uses SLCD.
the rest use TN display + film
If i am, not wrong , though the newer upcoming Win 8 phones may use SLCD 2 or Super Amoled HD
My Moto X screen looks too yellowish compared to other LCD display phones like Nexus, iPhone's etc. Is it the issue with Moto X's Amoled display or something is wrong with my device?
What you're noticing is just the inherent difference in color reproduction between AMOLED and IPS displays. Most IPS displays have cooler color temperatures and do a better job at producing a true white although with less color saturation.
That being said, I have gone though 2 Moto Xs and the first one came with a very poorly calibrated display and a gross greenish tint. My second one was much better, but I returned it for other reasons, future burn in being one of them. Burn in is different from the problem you're seeing and can best be described as bad tan lines. Some areas of the screen will have different brightness (mostly the nav and notification areas) and it will be obvious when you switch to landscape mode that something isn't right.
If you think something is wrong with your screen and still have a valid warranty, give Motorola a call and let them know about it. They seem to be pretty good about making things right.
No screen burn for me... Had the phone since January and mostly a heavy user too. Maybe no burn because I keep the brightness level down most of the time?
Sent from my XT1053 using XDA Premium 4 mobile app
Jayrod1980 said:
No screen burn for me... Had the phone since January and mostly a heavy user too. Maybe no burn because I keep the brightness level down most of the time?
Sent from my XT1053 using XDA Premium 4 mobile app
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Frankly, it's just a case of not taking care of the fact that we're using OLED tech which is sensitive to static images much like Plasma tech. If you're on Kitkat and use transparent bars like most of us: I can't imagine how anyone could suffer from burn-in that won't go away with time.
http://forum.xda-developers.com/moto-x/general/fyi-dim-screen-moto-white-glove-t2753559
But I did not keep it long enough to notice burn.
No burn in here, but I use fullscreen so I don't have a notification or navigation bar.
makakalo said:
What you're noticing is just the inherent difference in color reproduction between AMOLED and IPS displays. Most IPS displays have cooler color temperatures and do a better job at producing a true white although with less color saturation.
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This is absolutely wrong, no offence. IPS displays do not have any cooler colour temperature! They are less saturated than AMOLED displays mostly, and thus the colours look less vibrant, or more accurate if you will. At the same time they will look extremely dull / pale. If possible just look at the S5's display, it has the best white I have seen in a while, neither yellowish or bluish, near perfect.
And yes, I agree with OP, there is a slight Yellowish tint on mine. This reminds me of the the Galaxy S2's display panel. There is nothing you can do other than getting adjusted with it, but you can try increasing the Blue bias of the screen, to something like +3 or +4. There is an app called Screen Adjuster on Google Play to do that. I am using that now, never thought I would have to use it again since S2 days. By increasing the Blue bias the screen will look little "cooler", the Yellowish white will become Bluish white.
This has nothing to do with burn in by the way.
I should have been more clear about that. It's the backlight source that affects color temp the most. Since most IPS displays use white LEDs for backlighting they appear cooler than many (not all) AMOLED panels and older TN displays using CCFLs. Since the individual pixels are their own backlight with AMOLED there is more variability in color reproduction depending on use and calibration.
And it does have something to do with burn-in. If you have a mostly blue background then those subpixels will see more use than the red and green subpixels. Once the blue subpixels fade enough you're left with a yellow tinted screen. It's not burn-in in the traditional CRT sense, but it's still uneven wear. IMO: The small perks of Active Display are not worth having a screen that can be damaged by normal use.
http://forum.xda-developers.com/showthread.php?t=2404256
Questions go in the Q&A section.
I called up Motorola customer care and they asked me to visit nearest service center. They will have a look and decide if anything is wrong in the device. So, this yellowish tint is bit common in Moto X due to AMOLED screen.
rishi.gohil said:
I called up Motorola customer care and they asked me to visit nearest service center. They will have a look and decide if anything is wrong in the device. So, this yellowish tint is bit common in Moto X due to AMOLED screen.
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It can be. There's a member around who got like 4 replacements or something....all with different degrees of it.
I find you don't notice it after a bit.... Unless you put 2 phones side by side.
Personally it doesn't bother me....it would if it was too yellow. I find the dimmer the screen, the more you notice it also.
My first moto x I had since October got burn in around January. I got a new one in June and I have burn in again. It isn't enough to warrant another replacement (yet).
Can someone explain to me how this phone suffers burn in? Burn in is a thing from old CRT televisions, not really the new LED screens (at least, to my knowledge)
i've always used gravitybox to give the statusbar a grayish color instead of black (and here lately the tinted statusbar xposed module) and keep it in expanded desktop with pie controls, so there's no nav bar, and not seeing any burn issues yet, had it since Dec. the horrifically bad burn in on my note 2 is what made me want to be extra careful with the x.
No burn in here after 7 months on mine nor my sister's Moto X.
fargles said:
Can someone explain to me how this phone suffers burn in? Burn in is a thing from old CRT televisions, not really the new LED screens (at least, to my knowledge)
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Burn in is common in amoled type displays, specifically on phones such that rely on a nav bar instead of capacitive buttons. The longer the screen is on, or the higher the brightness, the bigger the possibility for screen burn in . Out of the three amoled phones I have owned, the two that have burnt in both had on screen nav bars. I hope this (non technical) summary helps
I'm a bit hesitant to return to an AMOLED screen, but I've heard they've been much improved upon over the last couple years. Reviewers have so far gushed over the new Moto x screen. But, comparison shots where the X is placed next to screens of other top devices shows that the whites are "off". I'm not so concerned about somewhat oversaturated colors, but it's always the whites that bother me the most.
Is it possible for a kernel dev to come along and allow for the possibility to tune the color temperature, as has been done with other devices with IPS LCD screens? Or, is there something with an AMOLED that would make this impossible to do?
This will get better over time as blue degrades faster over time than red and green
So I was playing around with my settings and decided to give battery saving a whirl. The first thing I noticed was the completely backwards design of the UI color language in this mode. Considering the N6 has an amoled, it was perplexing to find that batter saving mode used a bright orange theme instead of a black one. I would have thought the screen technology would have made a black theme a natural fit. Is anyone else confused by this decision? Is there a setting I am missing?
Haha you definitely have a good point. Designer probably slapping himself in the forehead. I guess the thought behind it is that making it dark wouldn't apply to all phones since some use lcd panels plus the bright color is a warning to remind you to charge your phone
This feature on Android is for every phone, not just exclusive to the Nexus 6. Other phones that utilize a IPS screen doesn't need a dark background.
Although, you do have a point, it is odd that Motorola chose a AMOLED screen over a IPS when Lollipop is "white" and white uses more battery than blacks on AMOLED screens.
Hi, I've just owned an XZ1c and I am super happy with it. One thing bothers me about the battery consumption of dark/black vs white/bright wallpaper. My old phone has an AMOLED display so it is obvious to have a full black wallpaper to save the battery, but how does it work on XZ1c ? I am not an expert in display technology so I would like to hear your opinion. Is black/dark wallpaper more battery-friendly on XZ1c than white ones or they have the same battery consumption?
ortolan said:
Hi, I've just owned an XZ1c and I am super happy with it. One thing bothers me about the battery consumption of dark/black vs white/bright wallpaper. My old phone has an AMOLED display so it is obvious to have a full black wallpaper to save the battery, but how does it work on XZ1c ? I am not an expert in display technology so I would like to hear your opinion. Is black/dark wallpaper more battery-friendly on XZ1c than white ones or they have the same battery consumption?
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Same
ortolan said:
Hi, I've just owned an XZ1c and I am super happy with it. One thing bothers me about the battery consumption of dark/black vs white/bright wallpaper. My old phone has an AMOLED display so it is obvious to have a full black wallpaper to save the battery, but how does it work on XZ1c ? I am not an expert in display technology so I would like to hear your opinion. Is black/dark wallpaper more battery-friendly on XZ1c than white ones or they have the same battery consumption?
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In a LCD screen, pixels are ALWAYS on (when the screen is on obviously), even when is black. So it won't matter.
Dany is right. In LCD the light under pixels is always on. On black color screen the pixels are just fully closed to cover the light below.
On really big screens like TVs it's a little bit more complicated but we're talking about <5" screen.
Thanks guys, such a relief that I can set a full white wallpaper without sacrificing more power.