I'm no developer so i have really no idea if this would work.
But, as this mobile is a AMOLED screen, each pixels are lighted up and so not much battery is drained on a black screen.
What if we could somehow make something when a new sms has not been read and screen turns of, a black screen like this appears
Is something like this possible?
pic example, could even be smaller or just 1 blinking pixel.
http://forum.xda-developers.com/showthread.php?t=706426
I think to display a message on screen the machine would need to be awake, so it would be using more power than with an led notification (afaik the device can normally go to sleep then).
Your idea would still save power over just showing the lock screen though because you are right that using fewer pixels would proportionally reduce power usage of the screen.
I guess the hardest part would be making the device appear off - It would need to ignore screen and button touches (except power).
Related
I was thinking that since the OLED screen does not use any backlight, lighting up a few pixels just to form a little led blinking would not tax too much the battery.
I don't know, however, whether waking-up the phone entails significant increase in battery usage. A middle solution would be to wake it every 2 minutes for 10 seconds in order to display the notification and the let it sleep again.
What do you think?
Sounds good good but im not to sure about that... there was another post about having the illuminating back button flash, maybe both menu and back buttons.. alternating between each one with a speed setting?
i love the idea, but the screen is 'off' for a reason...
first of all i don't know if oled screens can 'burn' (meaning the pixels are still showing when they are suppost to be 'off', because they have been 'on' to long)
Also, if it means the chips that control the screen have to be active instead of inactive, your battery drain may be kinda big....
I don't know that OLED would have burn-in (that's more a CRT thing), but they might well burn out - they do have a finite lifespan.
But you're probably right, it would likely mean that the phone couldn't completely go to sleep.
Mithent said:
I don't know that OLED would have burn-in (that's more a CRT thing), but they might well burn out - they do have a finite lifespan.
But you're probably right, it would likely mean that the phone couldn't completely go to sleep.
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Click to collapse
well, in such a case we could rotate randomly the pixels to be lit up (as in real old time screensavers).
With regard to out of sleep battery consumption you have a point. Maybe we could just wake it up for a few seconds and then have it sleep again. In any case if we assume that the major battery draw is the typically screen, then such an arrangement might prove to be acceptable - at least in some cases.
Why not use the backlight on the menu and back button? They shouldn't use too much power or get burned?
Keychar said:
Why not use the backlight on the menu and back button? They shouldn't use too much power or get burned?
Click to expand...
Click to collapse
Yes - I agree this is a very good alternative - yet I do not know how bright these leds are.
Nevertheless, I noticed that the screen is able to display a big animated icon of the battery charging even when the phone is off! (I just received it and I put it in the charger). Thus, I assume there is some kind of control of what the display shows without having to wake-up the system (at least the whole of it).
If this is the case, we could have some led like notification even when the android is in sleep!!
what you say is not necessarily true.. that icon is when the phone is off. which does not translate to being able to display something on a sleeping phone when it is on.. two totaly different issues ..
lgkahn said:
what you say is not necessarily true.. that icon is when the phone is off. which does not translate to being able to display something on a sleeping phone when it is on.. two totaly different issues ..
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Click to collapse
True. I will check whether it is displayed when the phone is on sleep (still off and charging). It implies, however, that the screen can be controlled (also?) independently of the OS.
(all in all the touch buttons respond / light up when touched though the phone is off and charging).
Go guys!
I'm waiting this modification to buy this phone!
I belong to you!
Up !
Very funny topic one year later !
NoLED, BLN ...
The community is very powerfull !
Thank you all
Guys, just search NoLed on market and it's already made ^^. However, following neldar thread on BLN, NoLed use about 10% more battery per hour than off screen. BLN which is found in most of the kernel ( Except damianGTO one ) use about 1% more battery per hour and turn on the backlight of the touch key. Hope this will help you
Hello there.
New user, first post. I've searched if there was anything related but found nothing. If I missed something, moderators can merge or whatever.
Well, it seems you can see the Defy's current charging indicator with the phone turned off, *without* pressing the volume buttons.
Here's how:
1. Make sure the screen is clean (no crust, oil etc);
2. If you're using a screen cover, it might be best to remove it;
3. Charge your Defy with it switched off;
4. In a place with preferably sunlight, look at the screen from the side, at a 45 degree angle and adjust. If you look carefully, you can see the battery indicator!
The catch: Even when charging with the Defy switched off, the screen is partially on, albeit very dim indeed.
Maybe someone could take a screenshot?
Have fun.
Compass Linux.
isnt the charging status just shown on the screen anyway?
stewi21 said:
isnt the charging status just shown on the screen anyway?
Click to expand...
Click to collapse
When the Defy is off and charging, no. Press the volume buttons for the charging status to appear in all its glory.
Whether a feature or a defect, perhaps this is configurable somehow.
Examples:
1. Adjust (with the phone on) the screen dimness for when the phone is off and charging, so one could see from a distance how much is done;
2. Screen indicates when charging is complete (flashing for instance).
There *might* be a slight decrease in the charging time if the screen is completely turned off, but I don't think it would be noticeable.
Compass Linux.
I was told that amoled displays have no problem (and doesn't take much energy) to show for example the time even when the phone is on stanbdy.
Would be pretty cool to have all black screen and just the time in white when the phone is on standby.
Is there something that does that already?
Fking1 said:
I was told that amoled displays have no problem (and doesn't take much energy) to show for example the time even when the phone is on stanbdy.
Would be pretty cool to have all black screen and just the time in white when the phone is on standby.
Is there something that does that already?
Click to expand...
Click to collapse
On my SGS2 I use to use an app called noled free from market. It used to display the time on my dimmed lock screen but only when I got a notification. You could download it and just see if the option is there to show the clock all the time. Hope this helps a bit
Yes it does but only on dimmed display, i want something to show it when the display is off. From what i understood amoled can light only certain pixels up. And that way show the time on turned off display using power just for the pixels it uses to show the time.
Fking1 said:
Yes it does but only on dimmed display, i want something to show it when the display is off. From what i understood amoled can light only certain pixels up. And that way show the time on turned off display using power just for the pixels it uses to show the time.
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Click to collapse
Cool, if you get it sorted would you mind sharing what you did? I would like that feature too.
Sure
........
Would appreciate some more input on that
Would love this....I am gonna go home and tinker with NoLED today...
You can do this with NoLEd.
Just go through the options.
Remember to enable NoLed from: settings/Accessibility
My only thing is it keeps the soft buttons on when it is displaying the time
works for me in 'test' mode, but outside that, no luck.
and yes in the test mode, soft keys are still shown ...
versd said:
works for me in 'test' mode, but outside that, no luck.
and yes in the test mode, soft keys are still shown ...
Click to expand...
Click to collapse
Go to accessibility and turn it on
Doesn't the way noled keeps the screen dimmed kills your battery super fast?
I normally use an app called Glimpse, but sadly it seems to have no effect on Miui when it comes to showing notifications on the lock screen.
So I am using the built in screen on function in Miui 10, it works well all except for me not been able to extend the light on time from the default 8 seconds to something more like 30 seconds.....basically to give me enough to notice the screen has lit up and to be able to have a peek at the screen before the screen goes off again.
My wife cracked her Redmi 7 screen so I ordered a replacement screen+digitizer+frame from a reputable seller on AliExpress. I followed a guide to the letter and made sure not to damage anything while disassembling, and the re-assembly with the new screen went smoothly.
When I power on the phone the Xiaomi logo comes up nice and bright, but it then auto-dims in the usual way as it loads the system except it dims to an extreme level. I mean it dims so much I can only see what's on the screen if I go into a dark room/closet. When the system loads I can navigate menus normally (as long as I'm in a dark room) but changing the brightness setting has no effect. Turning on/off auto brightness does nothing either.
It doesn't seem like there's anything wrong with the LCD, because if I reboot to bootloader it sits there with the Fastboot logo and picture at full brightness until I turn it off. I took the phone apart again to check if there was anything obstructing the light sensor and I can't see anything wrong with it.
Has anyone seen this before?
Thanks