AMOLED: Black wallpaper = Battery saved?

[Quazar]

With OLED, does a black or dark wallpaper mean battery life is saved? Or is it the same as LCD where any colour uses the same power.

Thanks

 

[nx1977]

No, AMOLED needs a pixel to be powered all the time, unlike LCD where blacks come from turning the pixel off.

So you'll use the same power, no matter the colour. Only Brightness level will have an effect on battery usage.

 

[smellyfungus]

isnt that the opposite. lcds always need the backlight but since amoleds have individually powered pixels they can turn off to display true blacks.

 

[grainysand]

No, AMOLED needs a pixel to be powered all the time, unlike LCD where blacks come from turning the pixel off.

You've got that backward.

 

[Quazar]

So dark background = saved battery?

 

[Eazail70x7]

I am currently using the open home hero theme. The default wall paper with that theme has a black background

 

[nx1977]

You've got that backward.

Oops. So I have.

 

[Yenzehn]

http://data.4dsystems.com.au/downloads/micro-OLED/Docs/4D_AMOLED_Presentation.pdf

Page 15.

Power usage heavily influenced by color brightness - white 330% of TFT, dark - 40,27% of TFT.

 

[Quazar]

http://data.4dsystems.com.au/downloads/micro-OLED/Docs/4D_AMOLED_Presentation.pdf

Page 15.

Power usage heavily influenced by color brightness - white 330% of TFT, dark - 40,27% of TFT.

Does that mean dark = saved battery?

 

[Yenzehn]

Does that mean dark = saved battery?

Yes.

And white is really, really bad(since all subpixels have to be turned on).

 

[Quazar]

Yes.

And white is really, really bad(since all subpixels have to be turned on).

Interesting, wonder what effect it would have on a days usage having a light background, and having a dark one.

 

[lekky]

Luckily I love dark backgrounds!

 

[Quboid]

Interesting thought. Maybe someone will benchmark it to see how much difference there is in real terms.

I guess a live background of snow falling on the ground is really a bad idea (live backgrounds sound like a battery hog to me).

 

[gogol]

Yes, black (color #000000) background will definitely save your battery.

Organic LED - Wikipedia, the free encyclopedia

While an OLED will consume around 40% of the power of an LCD displaying an image which is primarily black, for the majority of images, it will consume 60

 

[lekky]

search he market for nexusmod live wallpaper, its the same but you can change the colours!

 

[gogol]

Updated my post above to show AMOLED power saving on different kind of background images.

 

[Yenzehn]

Gogol, did you test the read of the posts before your own?

 

[Yenzehn]

nice, is 20k hours lifespan of the screen a long time? how many years is this?

That depends entirely on how much you use the phone.

If the phone screen is on for one hour every day, that is 20k days =~ 55 years, divide by the number of hours you've got your phone screen on every day.. I think you will still be fine.

 

[grainysand]

At 9 hours with the screen on per day, it appears it'll last about 6 years (mine's not on for that long, just exaggerating "just in case"), which is still fair enough given that I'm not likely to keep mine for six years.

 

[Lukehluke]

I like some of the default backgrounds but I might amaze people with the moving ones

 

[gogol]

I made screenshots of the statistics and attached to my post for easy reading Oh yes, I admit, I did not look yours, but I searched the web after I saw the same screenshot from user Irkan post in XDA-dev forum.

Gogol, did you test the read of the posts before your own?

 

[gogol]

Here, I did some experiments:
AMOLED: Black wallpaper = Battery saving (experiment result) - xda-developers

Roughly, you will get 1.5% battery saving per 15 minutes if you are using black background compare to the default HTC Desire wallpaper.

 

[TimMatrix]

Is it OK to leave AMOLED on all the time, while on a charger? I mean, maybe as a night clock by my bedside? Will this affect the lifespan of the AMOLED display (burn-in problems?)

 

[The_Verse]

So, black background is going to save me battery, eh?

Anyone got any sexy dark background recommendations?

 

[miasma]

So, black background is going to save me battery, eh?

Anyone got any sexy dark background recommendations?

Do what I did - Google 'black.png' on the phone and use the image off Wikipedia!

It's a tiny file, will save you battery and saves the desktop looking cluttered; I can't stand pictures behind all the icons.

/rockin' 100% black desktop on all my computers & phones since, well, a ZX81 or something I suppose!