Tag Info

Hot answers tagged

14

Yes, it uses the light sensor, and yes most of the smartphones support it. As for how does it work; Smartphones, generally, have a light sensor located in the bezel right next to the screen that measures the ambient light together with control software that appropriately raises or lowers the screen brightness based on the measured light level. If you are ...


10

It looks like this can be done on just about any device with the caveat that your device needs to be rooted and you need to be willing to poke around in your system's framework-res.apk file. These instructions come from a post on XDA with a modification intended to lower the brightness, but scaling in the opposite direction would make it brighter: Here ...


8

Yes, as you have guessed on devices that support automatic screen brightness, there is a light sensor, it's typically a small hole on the side of the screen. Not all phones have a light sensor; for example Samsung Spica lacks one, though you can use the Power Control Widget to quickly change the brightness.


5

It's to alert you that the screen's about to turn off. It's more useful when your timeout is longer than 30 seconds, certainly. I would assume you'd need a custom kernel or at least to root and edit some config files in order to prevent this, I don't believe there's anything in Settings for it.


5

An application like Locale ($9.99USD) will let you do that. At say 9 am you can adjust the brightness to one setting, then add another condition to adjust the brightness to a different setting at a different time. Tasker should be able to do it as well. It does a lot of what Locale does, plus more. It also supports all the Locale plug-ins. It is also about ...


4

How about AdvancedBrightness? It's not automatic - you'd have to configure it accordingly. However, since you said "adjust throughout the day," this may well be a suitable app for your needs. Oh, and it's free and very small (33kb).


3

That's easily possible using Tasker (I do the same for selected reading apps to increase the timeout to 2min, while also having the 30s default for all other apps): Condition: App (select the apps you want to keep the screen active for) Task: Display Timeout (configure the timeout interval using the sliders) Alternatively, in "Task" you could also let ...


3

I reinstalled CM7 on a spare HTC Desire to check the procedure: Long press on spare space of homescreen Select "Widgets" Select "RenderFX widget" Choose color (night, red, etc.) Place Widget. Results in a toggle switch widget:


2

The Clock app is setting flags on its own fullscreen window that override the system default screen brightness, but this only affects that app's window. See the source for DeskClock.java 551 winParams.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN; 552 winParams.dimAmount = DIM_BEHIND_AMOUNT_DIMMED; 553 ...


2

If you don't mind programming it in, Llama is a free alternative to Locale and Tasker! :) It has date/time of day triggers with screen brightness actions (along with quite a few others!).


2

Short answer: no. Auto brightness is usually a battery waster. I like to use the Brightness widget, it will let you turn on/off auto-brightness or with one touch adjust the brightness to one of several presets.


2

I also had this problem with Lux, always light reported -1, which I don't know it's a problem either from phone, sensor, Android, or Lux itself! BTW, I solved it by using front camera instead of light sensor. here is how: go to Lux settings click on Sample Collection click on Light reading modes select Camera instead of Light sensor select Front camera ...


1

Screen Filter changes brightness below what is possible using auto or manual settings. It works on Android 4.4. Great for bed time reading. Correction - (and contrary to the down vote) it does let you set the Auto Brightness Level to a level below what it normally would be - without rooting. I just tested it.


1

I have been using Lux Lite and it works well for me. Lux isn't your ordinary brightness app. It intelligently adjusts the brightness of your display based on the environment you're in. If you step into a dimly lit room, Lux will automatically lower the brightness of your display to make it not only comfortable to read, but to also preserve battery power. ...


1

So I went digging in the Cyanogen source code. It appears that settings work as follows: The brightness is determined from ambient light sensor based on spline (can be changed in "Adjust"). Brightness adjustment - Makes overall auto-brightness result darker or lighter by affecting gamma value. Centering the slider means "no change". Adjust to sunrise and ...


1

Editing /system/build.prop and changing the ro.lcd_min_brightness property may work. That property may not exist in your file (It doesn't in the file for my GS3), in which case it will default to 20. Lower numbers mean lower brightness. This doesn't actually work on all devices though. For example, on the Galaxy S2, setting the property to a lower number ...


1

There are different apps to change rendering effects, I think, and there's also an app to dim your screen way more if you're rooted: https://play.google.com/store/apps/details?id=mobi.pruss.superdim Otherwise, CyanogenMod does not have widgets for this. I think certain custom launchers (such as LauncherPro or ADWLauncher) have the option to create shortcuts ...


1

Ok, I found out the reason for this problem is the band differences on the 3G: S5830: HSDPA 900 / 2100 S5830B: HSDPA 850 / 2100 S5830L: HSDPA 850 / 1900 And the incompatibility with the current firmware I had (I updated to CyanogenMod 7.2.0 and still had the same issue), so for a quick fix, I went to: Settings > Wireless & networks > Mobile ...


1

Samsung with its quest to be different, enriched the stock browser, with its own brightness control, totally separate from the OS. No root There's no workaround, you have to set the brightness independently. Even using an app to control the brightness levels, as soon as you launch the stock browser, its own brightness control overwrites the one from the ...



Only top voted, non community-wiki answers of a minimum length are eligible