Database Users

Power saving wallpaper

I have been considering a mostly black wallpaper in order to save power on my tab. After reading this post i want to look into the actual benefits of saving a small percentage of juice under my conditions (sometimes i just sit around flickincking between homescreens like an idiot)...
Theres a great chart at that post from ars technica:
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Im gessing there is no benefit for the tabs display but what the hell?
Maybe its worth giving this a little test. What do you suggest? two 10 minute runs on 100% brightness, one pure black one pure white? maybe a gray as well?

SGT as opposed to SGS is not equipped with any type of OLED screen but regular LCD. Therefore black would be very power consuming color.

Khisha said:
SGT as opposed to SGS is not equipped with any type of OLED screen but regular LCD. Therefore black would be very power consuming color.
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So you would think - but judging by the chart the difference in power consumption is minuscule!

My fault. LCD almost careless about this today. Perhaps I had plasma on my mind.

bump - still interesting

Khisha said:
SGT as opposed to SGS is not equipped with any type of OLED screen but regular LCD. Therefore black would be very power consuming color.
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Only when compared to an OLED screen!
With a regular LCD, it won't make a blind bit of difference because it's the backlight which is draining the power and it's always on anyway when the screen is on, regardless of what is actually being displayed.
Regards,
Dave
EDIT - just realized this thread is 20 days old and so I shouldn't have bothered posting!

Bump - i for got how interesting that image in the first post is

Bump - may still be interesting for many people!

Interesting for many people that have an OLED screen...Galaxy Tab does not have OLED. This scientific american article (from 2007) claims that white saves more energy on most LCD displays.
It depends on the 'rest state' of the LCD that is in the Galaxy Tab which would be more efficient, white or black, and according to other tests that i have seen the savings would be negligible compared to the cost of backlight operation.
Want to save battery on your Tab?
1. Dim your display.
2. Turn off unnecessary comms, 3g/wifi/gps.
3. Turn off haptic feedback.
4. Use less apps that run in the background.
5. Use longer intervals for apps that auto-refresh.
The list goes on and on, and in the end only 2 or 3 things are really going to make a difference for each person. If you sit and stare at your background all the time, then making it white or black probably will save you battery because you will not be staring at it any more.

beestee said:
This scientific American article (from 2007) claims that white saves more energy on most LCD displays.
Click to expand...
Click to collapse
According to the original research illustrated in the header picture, there is little to no difference between light colors...

This is indeed interesting... Thanks for sharing!

Possible screen issue?

I just picked up my nexus this morning and just noticed that my screen has a 1 pixel line that runs down the left side of the screen. It is very noticeable on white pages. I stopped by my bestbuy and checked out the demo and it has the same line... anyone else notice this?

Maybe you should post a pic?

harajuka said:
I just picked up my nexus this morning and just noticed that my screen has a 1 pixel line that runs down the left side of the screen. It is very noticeable on white pages. I stopped by my bestbuy and checked out the demo and it has the same line... anyone else notice this?
Click to expand...
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i opened google homepage for white background and do not see this line

I just used the Screen Test app and did not see any lines.

Is it a greenish looking line when you view white or bright grey backgrounds when the brightness is low? My Vibrant has this, and I'm quite sure it's a consequence of the AMOLED RGBG pixel arrangement... just have to live with it.

I just don't see any green lines at all. Perhaps if you guys can get a screenshot, others will have a better idea of what you're talking about.

I'll try to take a pic when I get home, but just checked out another bestbiy and looks light their demo has the same green line... the reps noticed it too so I know it's not just me .

Ok here is a pic that I just took.. If you look on the left edge of the screen you will see a green 1 pixel line..
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Yes, same thing on my Vibrant and any other 4" SAMOLED panel by Samsung, it's normal. Go to wikipedia and lookup pentile matrix display and look at the subpixel matrix arrangement of the Nexus 1 picture (RGBG) and you'll know why it's there.
(When the red, green and blue pixels are lit, the human eye perceives it as white, but at the edge, not a full RGBG pixel is there to make it look white, so it looks green to us since it's probably missing a red or a blue, and the human eye is more sensitive to seeing green)

thats normal. All galaxy s phones have this problem.

dinan said:
Yes, same thing on my Vibrant and any other 4" SAMOLED panel by Samsung, it's normal. Go to wikipedia and lookup pentile matrix display and look at the subpixel matrix arrangement of the Nexus 1 picture (RGBG) and you'll know why it's there.
(When the red, green and blue pixels are lit, the human eye perceives it as white, but at the edge, not a full RGBG pixel is there to make it look white, so it looks green to us since it's probably missing a red or a blue, and the human eye is more sensitive to seeing green)
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Thanks! good to know its not an issue...

I have it too on my Galaxy S. Funny, never noticed before
Sent from my GT-I9000 using XDA App

severoprisan said:
I have it too on my Galaxy S. Funny, never noticed before
Sent from my GT-I9000 using XDA App
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and now you will notice it every time you look at it...kind of like the arrow in the fedex logo.

lol yes, I suggest if you didn't notice it before, don't go looking for it.

Nexus Prime or Photoshop ???

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http://phandroid.com/2011/10/04/leak-is-this-the-nexus-prime/
I know you’ve seen that thread title before. We’ve posed the question for at least two different renders now but later found those to be fake. So here it is again – is this the Nexus Prime As you can tell, it has a 720p HD display (it’s more like 1180×720, but who’s keeping score?) and has software buttons on the bottom, an optional feature in Ice Cream Sandwich for OEMs who don’t want to include hardware navigation buttons on their devices. DPI also sits at a cool 320 and unfortunately sources are hearing this may be a 4.3 inch device.
The Nexus Prime is rumored to be the first Ice Cream Sandwich device and will reportedly have a 4.5 inch – 5 inch display with the resolution mentioned above as well as a dual-core processor (we’re betting on the TI OMAP4 variety but wouldn’t be surprised – or mad – to see Exynos inside). We are awfully close to Samsung and Google’s October 11th event in San Diego so hopefully more of these leaks trickle out leading up to that. [GSMArena]
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4.3" seems to be a typo that people are slowly correcting (first person to post this was GSMArena, they had it at 4.3" in the article, but 4.6" in the title, and it has since changed) Also, further speculation shows that the on screen buttons make up for the rest of the pixels (so it truly is 720p) . I believe it is real, and can't wait for it
Its basically 4.3" if you don't count the onscreen buttons as apart of the screen, 4.6" with.

Seems a little odd the button area is deep black and the background above is "greyish" The whole beauty of an AMOLED screen is the black should be pure black. When you look through the menus on the vibrant the text sits on a very deep black background. something is not right with this leaked picture

peddent said:
Seems a little odd the button area is deep black and the background above is "greyish" The whole beauty of an AMOLED screen is the black should be pure black. When you look through the menus on the vibrant the text sits on a very deep black background. something is not right with this leaked picture
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Click to collapse
Well, If you take a closer look at the area below the buttons area. The area below buttons are in DEEPER BLACK.
Hence, this could be photoshop product ????

And the bleeding edge. That's not something seen on amoleds
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dardani89 said:
And the bleeding edge. That's not something seen on amoleds
Sent from my SGH-T959 using XDA App
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+1000 -> 99.9% fake

you want to see the real deal check this out
http://forum.xda-developers.com/showthread.php?t=1289656

Watch this!
http://www.youtube.com/watch?v=oM9RO-GAKjE&feature=player_embedded

that's the same thing on that topic

350ppi OLED screens from Samsung

Move aside, Apple Retina Display – here come 350ppi OLED screens from Samsung
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Android fans have a long list of bragging material when comparing devices with Apple’s. There is one factor we haven’t quite been able to beat, though – Retina Display. But we all know the day when we can also silence Apple fanboys in this department is coming eventually, and it may be sooner than you think. Samsung may be able to bring this technology’s pixel density, along with the advantages of OLED panels, to upcoming Android devices.
With the development of FMM (Fine Metal Mask), Samsung is said to be able to achieve an OLED pixel density of up to 350 ppi (pixels per inch). Currently, such high-density pixelation can only be achieved by with LCD mobile displays. And even though we have devices like the Galaxy Nexus, which does have a 720p AMOLED display, the crispness and clarity can never match that of the HTC One X or Apple’s Retina Display (due to its need of a pentile display).
Mixing the colors of Super AMOLED displays with the non-pentile pixel-density of LCD would be a dream. The difference would mostly be noticed in small text, which is actually pretty crisp in AMOLED HD displays. But does it match HD LCD? Definitely not.
Long story-short: this technology is said to be easily applicable to current OLED technology. This makes it inexpensive and simple to start manufacturing such OLED displays, and we might be seeing them in upcoming Samsung devices rather soon.
Maybe -- we might see this in NOTE 2 :good::highfive::good:
source : phandroid

Remember that super high resolution display I told you guys Samsung was working on?
Well, it may not have quite the same ppi, Samsung is getting ready to release an 11.8-inch tablet with "Retina-like" screen resolution. Prepare yourself...
The Apple vs Samsung trial has already uncovered a few buried nuggets from Apple’s camp, revealing early iPad prototypes that never made it into production. Today, with the Apple vs Samsung trial kicking off in full effect, court docs are giving us details on tablets coming down the pipeline, this time from Samsung.
Looks like ‘ol Sammy is prepping a tablet codenamed the “P10,” and it’s claim to fame will no doubt be its 256 ppi, 2560×1600 super high resolution Retina-like display. It will be interesting to see how Android will handle a resolution higher than 1080p (I’m wondering if things will look stretched out like in Android’s pre-tablet days).
Court docs don’t reveal too much in terms of a release date, citing only a vague 2012 launch. It’s possible Samsung could be announce the P10 during their launch event on August 15th — they did mention something about a new Galaxy — but I’m still placing my bets on a Note 2 unveiling. How do you guys feel about an Android tablet, of this size, with that high of a resolution. Excessive? We’re gonna need a bigger gun- er, better processor.

441ppi really?

So Samsung claims they have a 1080p 441ppi screen but the first macro pics we can see (like here) shows a new kind of pentile arrangement which leaves some interrogation.
If the green subpixels are on par with an RGB matrix, then the Red and Blue are now shared vertically and horizontally?
This would mean the subpixels ratio vs a RGB panel would be even lower than on the SGS3, and in fact closer to 720p.
Or, as the picture can't tell us much about the real scaling, is it working diagonally in a more acceptable way? else, are 2 Green subpixels always activated together?
What is the real subpixels number?

We don't know any of this until somebody will do an actual controlled 1:1 comparison between an LCD and the new screen.
The closest things we have is this; as you linked:
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Now, the font style is not the same. The background is not the same colour.
However, is is roughly a comparison at almost the same size. However, here's the kicker: There is no actual loss in edge sharpness.
The notion of a physical pixel doesn't seem to exist here anymore, and we see PenTile in what I believe is its first implementation with no disadvantages.
We should by all means see the RGB subpixels at that resolution but I need to zoom in another 250% for me to actually see them, at normal distance I actually see fake white pixels in the character, at the same resolution as the Xperia Z.
If the font style weren't different, then I imagine the illusion to be complete, as for example the horizontal bar in the middle of the character seems to be about ~34 pixels wide on both images, and you can actually overlay an imaginary resolution grid over both and it would overlap the same.
The only case where this won't work is when there are edges of high contrast of between exactly two logical pixels.
In any case, very interesting layout they did with the new screen.

I agree this is probably good enough and an improvement in everyday use.
On the "no disadvantage" part I'm not really sure.
I mean, if the end result is quite similar to a 720p rgb matrix, the GPU will still have to work with a 1080p "internal" resolution for fine details actually lost on screen.
That's where I doubt this is the best they could have done. I feel like they made this choice to market a 1080p screen while a standard matrix 720p could have been a wiser choice on a performance point.
But they had to make this "long blue subpixel" for the Note2 in a 5.5" diagonal, their technology perhaps wasn't ready (or too costly) for doing the same in 5".
Anyway, it will be interesting to see better comparison, especially vs another 720p device with better reference pictures.