Database Users

Possibility of Auto-Change Backlight ???

Hey guys,
do you think it's possible to wirte a program which automatically can change the backlight according to the actual daylight condition.
Maybe it is possible to start the program when you wake up your device. then the program turns on the built in (front) camera for about a second or maybe more. The camera "checks" out the light intensity. If its very bright the backlight condition is set to the max.
his is only a idea. I'm thinking of it because for example today it's a very sunny and i can almost read nothing on the display of my touch cruise!!
What do you think about it?
greetings

any idea?
Or does any software like this exist?

Maybe the guy who wrote this program below could be of assistance:
http://forum.xda-developers.com/showthread.php?t=379270

Well, it doesn't have to be so hard...
All we need is a small service that reads from a file the approximate sunrise-sunset time and alters the brightness accordingly. If anyone has the time, he can additionally take advantage of the current time zone and calculate those limits automatically all year long!
Destinator 7 does the exact same think by turning night colors on and off. It is actually better than a build in brightness sensor because it never fails!

Nevermind...did not read the question thououghly

Yeah good ideas,
but a time sceduled scenery has also disadvanteges. When its clowdy outside it causes unnecessary battery consumption.

MVBklight 1.4.2 is not working on my polaris!!

w04g005 said:
Yeah good ideas,
but a time sceduled scenery has also disadvanteges. When its clowdy outside it causes unnecessary battery consumption.
Click to expand...
Click to collapse
I come from a rather sunny country (greece) so I really missed this!
Anyway, those PDAs have actually very low brightness screens. In a bright day you cant actually see anything. On the other hand, I have yet to see a rainy/cloudy day that requires a reduction to the maximum brightness level. Overall I think that a time scheduled solution should be the best solution for no sensor-equipped devices.

papajohn said:
I come from a rather sunny country (greece) so I really missed this!
Anyway, those PDAs have actually very low brightness screens. In a bright day you cant actually see anything. On the other hand, I have yet to see a rainy/cloudy day that requires a reduction to the maximum brightness level. Overall I think that a time scheduled solution should be the best solution for no sensor-equipped devices.
Click to expand...
Click to collapse
I second that! Even though I'm not from Greece but it's never too bright during the day. Right now my solution is to map the camera button to backlight so I can change it quickly.

Changing the brightness according to the time of day would not be as helpful as changing it according to the ambient light level. If you walk inside a dimly lit building during the day, you don't need the backlight to be as bright as if you were outside. Also, even outside, a cloudy day can be considerably dimmer than a sunny day.

jfeldredge said:
Changing the brightness according to the time of day would not be as helpful as changing it according to the ambient light level. If you walk inside a dimly lit building during the day, you don't need the backlight to be as bright as if you were outside. Also, even outside, a cloudy day can be considerably dimmer than a sunny day.
Click to expand...
Click to collapse
I totally agree, but given the fact that there is no ambient light sensor in our devices I dont think that we can do any better. Two scales, one for day and one for night and we are OK for most cases. Yes, as you point out this strategy fails but it is better than:
1. No brightness change at all
2. Manual changes.

papajohn said:
I totally agree, but given the fact that there is no ambient light sensor in our devices I dont think that we can do any better.
Click to expand...
Click to collapse
Thats the crux. Some devices especially the newer ones have a camera on the front. I'm no photo-expert but i think every camera is a "ambient light sensor".
The camera also reacts on different light conditions. You can see this by turning on the fps function. But i agree that it would be a lot of work.
Maybe we have to wait till more people and programmers own htcs with such bad displays like the polaris.

Titan Photo Sensor
I found myself thinking about this auto-backlight topic on my way home tonight after a long trip using my 8600 as a GPS. The screen went from being a clearly-visible screen during the day portion of the trip to a flashlight in my eyes at night. While I knew I could adjust the backlighting manually, I didn't want to mess with it while driving. Also, living in Arizona, I can barely make out the screen when in daylight unless the screen is on maximum brightness, but max brightness is horrible on battery life, so I would rather not set it to that by default.
Anyway, the Titan has a photo sensor on the keyboard which is used to determine dim lighting conditions and automatically illuminate the keyboard. I'm not sure if the exact lighting value being detected by the photo sensor can be read, but if it can be, then it should be relatively easy to write an application that would automatically adjust the backlight setting whenever the keyboard is slid open.
The application could both use location-based sunrise/sunset algorithms to set the default backlight value based on time of day, and also allow the setting to be overridden momentarily (perhaps only until the screen is turned off again) by opening the keyboard and sampling the ambient lighting conditions.

How to decrease backlight while keeping auto adjust?

Hi!
I wonder if there is a way to lower the backlight levels on auto adjust (or increase for those who think its still not bright enough). Point is I think having the backlight on generally lower levels will naturally increase battery life. I know I can change the the brightness to a fixed level that suits me - but that would just be right for the current situation. I still want it to adjust to different lighting situations. Ideas?

It would be nice if it was possible to change how dim the backlight gets on total darkness and how bright it gets on your average sunny day.
I've been messing around with the reg to see if I could find max and min values but I can only change manual settings, not auto mode using the light sensor.
One note though: The sensor itself uses battery to measure ambient light. That being said, if you spend most of the day under a constant light source (say an office) manually dimming the device should consume less energy since the sensor is not doing much good for you anyway.
I guess it's not your case. I had this app on my Cruise to change backlight intensity. never used until now. it works on leo (running 1.48 but that should not matter) and changes backlight in 25% increments. You can copy a shortcut to the startmenu and add a quick link to your home tab or map it to a hard or soft button somehow.
I wold really like to know how to change max and min levels on auto backlight.

Try Lumos - it's a backlight replacement that allows you to customise how you want your auto backlight to work, ie. what the minimum/maximum brightness is, how fast the backlight changes, etc.
http://forum.xda-developers.com/showthread.php?t=450318

Seems to work fine. Still some tunning to do. Thanks!

I'm using Lumos now and it works great! Simple to set up and easy to customize. Thanks for the hint!

lumos is great but I found it was draining the battery quite fast on the leo.
Admittedly I was using it with the wm6.5 Check for active programme only setting. I never tested it to see if it worked without checking that box.

As far as I can tell by now the batterylife appears to be rather better than before. I haven't put in any application exceptions and didn't check the one checkbox in the settings tab. I also use a custom curve where the backlight stays at 30% until the sensor hits about 400 (30% is plenty in my opinion and still brighter than my friend's iphone in normal light condition inside).

you should try AutoLight http://forum.xda-developers.com/showthread.php?t=548402
it works fine on Leo

Auto screen brightness doesn't work?

When I have my nexus one set to automatically adjust brightness, it doesn't seem to do anything.
I can move it between dark and bright environments and the screen brightness doesn't seem to change at all. Am I missing something or is this feature not working on my phone?

It works fine with mine. I just clicked auto in the brightness setting. Make sure you didn't accidentally change it to a different setting with the settings widget that is by default on the first home page to the right.

works fine on mine yet not a feature i use....i just set it statically.

I find the auto-brightness to be too dim for my liking. It would be great if you could adjust the overall brightness while still maintaining the automatic scaling.

Turns out it does work, it just need to be *really* bright to make it change.
It doesn't change really at all in my office between switching the lights on and off (even though that's a really big change in light levels to me). However, if i go outside, it does get brighter.
As you say though, it does seem to be set a bit low (hence it not brightening up when my office lights are turned on I guess).

If I enable auto-brightness on mine, it seems to constantly vary the brightness in my office. It's annoying as crap and I turned it off. Am I the only one?

It's probably taking a look at the available APIs to see if it's easy to write a quick app to do auto brightness with settings to be able to tweak it.

The auto-brightness feature changes constantly for me as well.

I 'm also having issues of the varying brightness when using auto-brightness -- even though the lighting in my environment has not changed and I avoid contact with the light sensor. It's VERY annoying.
I've since switched to using a static setting for the brightness.

auto brightness was one of the first things i turned off. it was way too dim for me

Not bright enough for me. Doesnt seem to change much.

I do see the variability occasionally. Most of the time it's stable, but it will take spells of shifting up and down repeatedly. Glad to know I'm not alone.

Auto bright annoyed me as well when I first got the phone. Then I realized where the sensor is (top left) and what it was responding to. Depending on where I'm sitting, what light sources are behind me, in front of me but reflecting off of me. It's usually just responding to a light source that's just withing view of its sensor. Also, my hand has shielded the sensor more than just a few times, confusing the sensor.
Now I leave auto bright on all the time, and it more often than not does a good job.

IMHO this is one of the few broken features on the phone. In continuous lighting it jumps from bright to dim to everything in between like a jack rabbit on speed. I still use it to save battery life but it pisses me off regularly.

am also having this problem. it constantly goes much brighter, and then, suddenly goes back to dim.. very annoying... however, the light sensor for calling works well... so, is it a software issue.. hope it gets google's attention and gets fixed in next update...

Bicster_ said:
If I enable auto-brightness on mine, it seems to constantly vary the brightness in my office. It's annoying as crap and I turned it off. Am I the only one?
Click to expand...
Click to collapse
+1 so I also manually go between three on the widget

Note that the light sensor is under the glass on the front of the phone. Some cover-all cases cover this, and if you use one of these I assume your phone will remain on the dimmest setting.
In general, while indoors it will remain on the dimmest setting (for me anyway), but rise to the necessary full brightness when in sunlight.
w00yee said:
am also having this problem. it constantly goes much brighter, and then, suddenly goes back to dim.. very annoying... however, the light sensor for calling works well... so, is it a software issue.. hope it gets google's attention and gets fixed in next update...
Click to expand...
Click to collapse
There are two sensors, one is a light sensor and the other is a proximity sensor to detect when you've taken the phone from your ear. I think you're referring to the second.

w00yee said:
am also having this problem. it constantly goes much brighter, and then, suddenly goes back to dim.. very annoying... however, the light sensor for calling works well... so, is it a software issue.. hope it gets google's attention and gets fixed in next update...
Click to expand...
Click to collapse
+1 constant occiliation on dimmness levles under consistant light. It goes from way too dim, to just right then back dark again. I too hope that google will correct this with the next update. Hopefully the patch gets pushed soon, i'd like that extra memory

Is there a mod to lower the auto brightness levels?

I really like the auto brightness feature, but it's consistently too bright for my taste.
Is there a mod or tweak out there that will allow me to lower/adjust my automatic brightness levels to save some battery life?

(Currently running Blackhole 3.0 / DL09, will go to Blackhole 4.0 once it's out tomorrow)

anybody have any ideas

Unless you know how to modify the kernel source (which I believe is written in C, correct me if I'm wrong devs) or modify some file that is the delegate for the ambient light sensor, you're SOL buddy.
Its probably hardwired into the kernel, would be my guess.

Hmmm, I thought automatic meant automatic. My bad. J/K
Sent from my SCH-I500 using XDA App

Yes, automatically too bright in most situations. Yet not bright enough in sunlight.
I almost need to cover the light sensor some to fool it.
This is where Samsung fumbles. Their software is poor. Whomever is writing the code, set the light sensor to brightness conversion wrong. At least on DL30 they fixed one mess up. On the original rom, when you plugged in external power, the brightness would go to a fixxed level. If you were outside in a car and plug in power, it would dim the display. Indoors at night, plug in power, and it would BRIGHTEN the display. What's up with that.

worwig said:
Yes, automatically too bright in most situations. Yet not bright enough in sunlight.
I almost need to cover the light sensor some to fool it.
This is where Samsung fumbles. Their software is poor. Whomever is writing the code, set the light sensor to brightness conversion wrong. At least on DL30 they fixed one mess up. On the original rom, when you plugged in external power, the brightness would go to a fixxed level. If you were outside in a car and plug in power, it would dim the display. Indoors at night, plug in power, and it would BRIGHTEN the display. What's up with that.
Click to expand...
Click to collapse
Whats wrong with manually changing it? It doesnt even take 5 seconds to change the level.

Kaze105 said:
Whats wrong with manually changing it? It doesnt even take 5 seconds to change the level.
Click to expand...
Click to collapse
Exactly. Why would you expect your phone to automatically make your life easier or function at an optimum level?

Kaze105 said:
Whats wrong with manually changing it? It doesnt even take 5 seconds to change the level.
Click to expand...
Click to collapse
What's the purpose of having a light sensor if it never works?
Often when I pop my phone open to do a specific task, '5 seconds' is about as long as it would have taken to do that whole task. And it's just annoying to unlock the screen, begin to attempt doing something, and then notice 'oh hey, the screen is basically unseeable!' and have to interrupt whatever you're doing. Or, even worse, when you're going from place to place and go through areas that are lighter and darker, forcing you to keep interrupting your work.

worwig said:
Yes, automatically too bright in most situations. Yet not bright enough in sunlight.
Click to expand...
Click to collapse
KitsuneKnight said:
What's the purpose of having a light sensor if it never works?
Often when I pop my phone open to do a specific task, '5 seconds' is about as long as it would have taken to do that whole task.
Click to expand...
Click to collapse
You guys nailed it. The screen is far brighter than I need while indoors at the office, but step outside and it just doesn't keep up with the bright Colorado sun (I can adjust it manually to a level that can be seen in sunlight just fine).
I could spend 5 secs adjusting the backlight each time the light environment changes, but why not spend 30 min optimizing the auto brightness levels and then never have to worry about it...

I know with my Moto Droid, someone had made a code that altered a particular file to change the lowest brightness level, but I have yet to see that for the Fascinate. It's a shame since the Fascinate's screen is so much nicer, but not set up optimally.
I know some dev's had also integrated the ability to change the auto brightness levels within custom ROMs for the Moto Droid. That'd be a great feature on the Fascinate!

KitsuneKnight said:
What's the purpose of having a light sensor if it never works?
Often when I pop my phone open to do a specific task, '5 seconds' is about as long as it would have taken to do that whole task. And it's just annoying to unlock the screen, begin to attempt doing something, and then notice 'oh hey, the screen is basically unseeable!' and have to interrupt whatever you're doing. Or, even worse, when you're going from place to place and go through areas that are lighter and darker, forcing you to keep interrupting your work.
Click to expand...
Click to collapse
That is to peoples own preference. I use auto most of the time and its fine. Doesn't work would indicate it doesn't change the brightness at all.
You can't expect it to auto sense it to every persons liking. Also does power control change it so you can see the screen, cause that doesn't take '5 seconds'
Sent from my SCH-I500 using XDA App

spenceuiuc said:
I really like the auto brightness feature, but it's consistently too bright for my taste.
Is there a mod or tweak out there that will allow me to lower/adjust my automatic brightness levels to save some battery life?
Click to expand...
Click to collapse
Try Screen Filter - its in the app store. With screen filter applied I keep my phone set to auto and screen filter reduces that more - in my case 50% more.

Well in the DL30 rom you don't have to go to the settings menu to change the brightness, just press and hold on the notification bar and then slide left and right to change the brightness.

Zong00 said:
Try Screen Filter - its in the app store. With screen filter applied I keep my phone set to auto and screen filter reduces that more - in my case 50% more.
Click to expand...
Click to collapse
Ill check that out. Thanks!

Auto brightness not working correctly

When I'm in a light room the screen goes brighter but if I walk into a darker room, the screen doesn't dim unless I lock and then unlock the screen.
Anyone else having similar issues?

Yep got the same here. Thought I had a faulty ambient light sensor but obviously not.
Sent from my SM-G935F using Tapatalk

Just tried it by covering the light sensor to make sure, no problem here (G935F). My only concern related to brightness is that the s7 just has auto brightness, but no adaptive brightness.

Uncheck the auto box and recheck. Then don't touch the slider. It's usually because in marshmallow the slider moves with the auto bright and most people touch it which makes it hold position.

jackdforme said:
Uncheck the auto box and recheck. Then don't touch the slider. It's usually because in marshmallow the slider moves with the auto bright and most people touch it which makes it hold position.
Click to expand...
Click to collapse
There seems to be a bug somewhere still. I just tried to move the slider while auto brightness is ticked and to cover the light sensor afterwards again and it still worked and to my surprise it even took into account that I lowered the brightness and took also a lower brightness at the covered state and took my initial setting after uncovering, pretty nice, so there is indeed still adaptive brightness. After ticking und unticking auto it went back taking the default steps for brightness as before.

Having the same issue here

Definately not touched the slider.
Also, I have tested the light sensor and it appears to work fine so definately a software issue. Though I imagine we will see some software updates to fix bugs shortly after the official release date.

So you can adjust the slider with the box checked and get various levels of auto? Does it learn?

jackdforme said:
So you can adjust the slider with the box checked and get various levels of auto? Does it learn?
Click to expand...
Click to collapse
Yes.
I can't tell for sure, when I change further steps the previous seems to stick, at least to some extend so there is a logic behind it, but I can't tell for sure if it really is based on each step and sets it accordingly or if it's just changes the range it operates in. Anyways I'm a happy camper.
Also, I could reproduce the device not changing the brightness, when I put it to full at darkness it won't move anymore in auto. But as soon as I lower it again it will also change accordingly again, maybe at those with the stuck brightness the min brightness is only raised, but not lowered anymore, but just an assumption and doesn't help anyone atm unfortunately.

Use lux in play store
Sent from my SM-N920W8 using Tapatalk

https://play.google.com/store/apps/details?id=com.velis.auto.brightness

This is the first Galaxy phone I had, that Auto brightness actually works the way I like it.

It seems to be working fine now. It just takes a few seconds for the screen to dim (maybe I was being impatient).
After testing it further it's actually really good auto brightness.

It works, just takes some time to adjust to the lighting. Maybe the default settings are set to a certain time. Maybe with root we can adjust this..

AngioNicholai said:
It works, just takes some time to adjust to the lighting. Maybe the default settings are set to a certain time. Maybe with root we can adjust this..
Click to expand...
Click to collapse
It seems to only do it quickly when the device is lay down (as 954wrecker said). Maybe Samsung did that so it doesn't annoy you when using your phone.

this is definitely a bug imo... the auto brightness doesn't change for me either...

CuBz90 said:
When I'm in a light room the screen goes brighter but if I walk into a darker room, the screen doesn't dim unless I lock and then unlock the screen.
Anyone else having similar issues?
Click to expand...
Click to collapse
I also have an auto briteness issue, when I disable AutoBrite and set it manually about half my apps override the setting and enable AutoBriteness in the app's screen usually dimming the screen? SpadesFree one example and I do not see an override in the app.

Confimed that I'm having same issue, auto brightness not adjusting and slider not movingoing. Have to move it manually

Same issue. It needs to be fixed manually by editing services.jar (root needed)
Nothing else will work. None of google play apps will help with that issue. Does not matter what you do, it will always dimming if you don't fix it in framework.jar

Try it out: http://forum.xda-developers.com/s7-edge/development/auto-brightness-bug-try-fix-t3339858