Power saving wallpaper - Galaxy Tab General

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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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!

Related

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]
Click to expand...
Click to collapse
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
Click to expand...
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
Sent from my SGH-T959 using XDA App
dardani89 said:
And the bleeding edge. That's not something seen on amoleds
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
+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

Weird Screen Issue

So here is the basic situation:
My friend and me bought a same i9000 from the same company at almost the same time. It's Telenor-Hungary.
We have been using it for over a year and I discovered an issue with the screens just yesterday.
I'll provide some screenshots:
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as you see the only difference in the two screenshots is that I use 182 dpi and he uses 240.
But when we look at the phones with our eyes its not the same.
Mine , the lover dpi one is faded and greenish its blue is not really pure.
we tried to take photos of the difference:
so you can see the left one is more greenish and it's like missing some light blue or something i cant define. The best way to say it his phone has deeper colors.
also we discovered another difference
this is the 240 dpi (right one) with the better colors
and thiis is mine the sh*t greenish colored
you can notice the sim tray and the micro sd tray is different colored.
any idea why my screen is different than his?
By the way we use the same rom/kernel : teamhacksung b14 and devils latest with led2
thank you please just take a loook
Oled screens get worn out after time, especially the blue color is going to wear out fast. It could be that one of you two uses his phone more intense than the other...
--------------------------------------
tapatalked from GalaxyS
Thats true mate!
I use 20 times more than him
This has nothing to do with usage.
It's just a difference in ur hardware. many users here on xda have this problem including me.
My girlfriends phone has so nice and deep colours but my phone just looks yellowish and wasted.
I installed chainfire3D and use nightmode to adjust colours manually which brought a really nice result and I also use voodoo color for adjusting gamma values.
This brought me a whole new display and now it looks like this of my gf. Feel free and try it.
and to your sim tray and sd card problem^^
Your friend has the protection stickers/foils still on and u don't - that's it!
greetz
Thats the same colour the Sim Tray. Thats plastic...
Sent with my Galaxy S using Tapatalk
Yes, you can think that's the amoled technology that gives a strange tint until you see different devices.
Then you will notice some screens are quite OK, some are yellow and some are blue (and right out of the box).
I don't know if Samsung had several screen batches (they do that on PC monitors and TV without warning) or if the amoled panel is just not regular at the end of its production process.
Supercurio tried to investigate on some Galaxy S II models, asked people to give their screen identification serial and which problem/tint they noticed. I don't know if he came on a conclusion.
Anyway, for now you have this gamma adjustment tool included in Team hacksung ICS, you'll also have a new "Voodoo screen tuning app" with profiles and advanced options soon (Supercurio announced he will release it after he has sorted out some payment/market issues).
How can u tell me then, why i can see a bright ribbon on white screen where my status bar normally is? 5his is deffinitely a wear symptom...
--------------------------------------
tapatalked from GalaxyS
Yeah, there's no denying screens get old too. I was just explaining this tint problem in particular.

7.7's screen: font looks bad, and yellow white

I was interested in the 7.7 and has tested it in several stores. There are two things that puts me off that I haven't seen anybody talk about.
1. The white is quite yellow. Compared to an ipad 2 or 3 or asus transformer, it looks much worse, and not so bright.
2. The resolution is supposedly good, but then why does the text looks so bad? I mean open the browser, and when it says Cannot connect to the internet page or something like this, that font looks not good. I also think the font saying Google search in the upper left corner also does not look good.
Is this just me seeing this? (same on many 7.7 devices i have tested).
I couldn't quite helping you with the yellowish issue, but if anyone had problem with the default fonts, there is an app called 'Fontomizer SP', which is a fonts package for Samsung Galaxy devices, that offers a list of additional fonts that you could choose from with preview.
nick5000 said:
I was interested in the 7.7 and has tested it in several stores. There are two things that puts me off that I haven't seen anybody talk about.
1. The white is quite yellow. Compared to an ipad 2 or 3 or asus transformer, it looks much worse, and not so bright.
2. The resolution is supposedly good, but then why does the text looks so bad? I mean open the browser, and when it says Cannot connect to the internet page or something like this, that font looks not good. I also think the font saying Google search in the upper left corner also does not look good.
Is this just me seeing this? (same on many 7.7 devices i have tested).
Click to expand...
Click to collapse
The display on the 7.7 using Super Amoled Plus is regarded as one of the best by most people and I've seen several 7.7 screens and the text and colours all look great. But, as always it is a matter of personal taste. I don't like the 4:3 screen ratio on the iPad which is bad for viewing wide screen films and it is too big to fit in pockets which is why I bought the 7.7. So if you don't mind watching films with black bands at the top and bottom and using a bag to carry the iPad around then get that.
ok, so it's only me then.
I was curious if anybody else notice these things.
Could it be related to font smoothing?
On my galaxy note the text looks good, but it has a higher DPI. But I can't understand it should be related to higher DPI as the 7.7 already has quite high DPI.
There are 3 modes under screen settings, dynamic (which I use for color theory experiments), normal (which I use for daily use), and movie (which i rarely use). Movie mode does appear yellowish, photos are over-saturated in dynamic mode.... try adjusting these and see if you get better results.
here's an "amoled doodle" I did playing around with rgb (additive color primaries) and cmy (subtractive color primaries):
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Color convergence issues

Hi all,
I've had my 6p for almost two weeks and tomorrow is my last day to return it. They will not extend buyer's remorse to a replacement unit so before tomorrow I need to decide if the issue I have is specific to my unit (get a replacement) or related to the AMOLED panel used on this phone (cancel).
The issue is that colors seem not to converge correctly, just like old CRT screens would. This is most noticeable on high contrast borders such as black text on light backgrounds, which my brain interprets as embossed text rather than nice flat text. Below is a zoomed in example showing this issue, upper borders are reddish/darker and lower ones are greenish/bright.
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Anyone else seeing this? my friend's S5 has a similar thing but way less noticeable and i could probably live with it, whereas my 6p is probably too much. Yes this is my first AMOLED.
Thoughts? thanks!
Alelanza said:
Hi all,
I've had my 6p for almost two weeks and tomorrow is my last day to return it. They will not extend buyer's remorse to a replacement unit so before tomorrow I need to decide if the issue I have is specific to my unit (get a replacement) or related to the AMOLED panel used on this phone (cancel).
The issue is that colors seem not to converge correctly, just like old CRT screens would. This is most noticeable on high contrast borders such as black text on light backgrounds, which my brain interprets as embossed text rather than nice flat text. Below is a zoomed in example showing this issue, upper borders are reddish/darker and lower ones are greenish/bright.
Anyone else seeing this? my friend's S5 has a similar thing but way less noticeable and i could probably live with it, whereas my 6p is probably too much. Yes this is my first AMOLED.
Thoughts? thanks!
Click to expand...
Click to collapse
You are joking? Right?
That image is blown up how much??
400%. Otherwise you wouldn't see it on a forum, but real life you can see it with no need to zoom
Feature, not bug:
https://en.wikipedia.org/wiki/Subpixel_rendering

How is the screen uniformity on your S5E?

I have a wifi US S5E a couple weeks now. I like dark mode and use it wherever it's available. But as you know, dark mode doesn't necessarily mean black background but dark gray backgrounds, and one noticed some uniformity problems. So I finally pulled up a gray test pattern and yep it's pretty ugly
Here's the S5E (right) next to my 6 year old original first gen tab S, displaying this video. Brightness is set to around 33% on both.
https://youtu.be/Qi4Wy7vE8-o
Like all OLEDs the S isn't perfect, but you can see the S5E is worse, almost like a gradient, grey on one side, black on the other side. Also, while the S is grey like it's supposed to, the 5e has a purple tint to it. The tint is exaggerated somewhat by the camera, but it's there in real life too. I never notice anything amiss with the S display on regular content, but the 5e uniformity definitely sticks out from time to time, especially in the evening.
So I'm wondering, do I have particularly bad uniformity or is this par for the course? Kind of disappointing that my spanky new tablet has in some ways a worse display than one that's ready to croak.
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The display on my Tab S5e is not bad
barth2 said:
I have a wifi US S5E a couple weeks now. I like dark mode and use it wherever it's available. But as you know, dark mode doesn't necessarily mean black background but dark gray backgrounds, and one noticed some uniformity problems. So I finally pulled up a gray test pattern and yep it's pretty ugly
Here's the S5E (right) next to my 6 year old original first gen tab S, displaying this video. Brightness is set to around 33% on both.
Like all OLEDs the S isn't perfect, but you can see the S5E is worse, almost like a gradient, grey on one side, black on the other side. Also, while the S is grey like it's supposed to, the 5e has a purple tint to it. The tint is exaggerated somewhat by the camera, but it's there in real life too. I never notice anything amiss with the S display on regular content, but the 5e uniformity definitely sticks out from time to time, especially in the evening.
So I'm wondering, do I have particularly bad uniformity or is this par for the course? Kind of disappointing that my spanky new tablet has in some ways a worse display than one that's ready to croak.
Click to expand...
Click to collapse
I suffer from poor uniformity too. Maybe not as bad as in your case, but clearly visible. I read that the bigger OLED screen is, the higher probability of suche issue. I was thinking about sending it back to get refund or exchange, but since I bought it abroad, I finally gave up on the idea. And you know what? After few months I almost forgot about it ? It's possible to get used to it
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