Related
Hi All.
I have wondered why the software that controls the backlight, with the light sensor, doesn’t adjust the backlight to the lowest setting, when the phone is in total darkness.
I use my phone in complete darkness almost every night, but I think the backlight is way to bright. I know I can adjust it manual, but why not automatic?
Do any of you bright heads, know a reg value to change or another solution, so I can "allow" the backlight to go to the lowest setting, automatically?
I find this anoying also. Any help would be great.
Anyone? I have looked in the registry but cant find anything... :-/
as far as i know there is no software\tweak that can change backlite to min
Same here. In my case, I'd like the backlight to be a bit brighter in brighter conditions, especially when in the car on a sunny day and I'm using iGo. Manually, I can set the backlight higher. I had a sony ericsson phone with a similar light sensor, but you could adjust its maximum threshold and the general brightness. Surely there's a software solution here somewhere!
I searched a little and quickly found some things:
1. The Diamond seems to have an in-built process to adjust brightness according to light sensor. Don't know if it works, though.
2. The registry keys are found at "HKEY_CURRENT_USER\BackLight\". You can modify brightness there, and it will affect the control panel BUT not change your current brightness. There is an Event you must trigger to update brightness. In many devices, this is the BacklightChangeEvent, in some others, this is SDKBacklightChangeEvent, and some others something different. Depends on the device and the manufacturer.
I wrote an app to change the registry value and trigger both SDKBacklightChangeEvent and BacklightChangeEvent. I can see on the control panel the value has changed, but the visible Brightness won't change. Seems HTC decided to make their own DLL to manage that, instead of standard windows mobile events.
So, I searched a bit further and I found that into "HKEY_LOCAL_MACHINE\Drivers\BuiltIn" there is a key called "Frontlight" which is apparently defining a value which points to Backlight.dll. This must be HTC's implementation of the Backlight manager. I was like "yay this will be my first windows mobile dll reverse engineering" BUT, I didn't find this file anywhere on the device, unfortunately.
If anyone could find it on the Diamond, please pass me the info !
Scotchy49 said:
I searched a little and quickly found some things:
1. The Diamond seems to have an in-built process to adjust brightness according to light sensor. Don't know if it works, though.
2. The registry keys are found at "HKEY_CURRENT_USER\BackLight\". You can modify brightness there, and it will affect the control panel BUT not change your current brightness. There is an Event you must trigger to update brightness. In many devices, this is the BacklightChangeEvent, in some others, this is SDKBacklightChangeEvent, and some others something different. Depends on the device and the manufacturer.
I wrote an app to change the registry value and trigger both SDKBacklightChangeEvent and BacklightChangeEvent. I can see on the control panel the value has changed, but the visible Brightness won't change. Seems HTC decided to make their own DLL to manage that, instead of standard windows mobile events.
So, I searched a bit further and I found that into "HKEY_LOCAL_MACHINE\Drivers\BuiltIn" there is a key called "Frontlight" which is apparently defining a value which points to Backlight.dll. This must be HTC's implementation of the Backlight manager. I was like "yay this will be my first windows mobile dll reverse engineering" BUT, I didn't find this file anywhere on the device, unfortunately.
If anyone could find it on the Diamond, please pass me the info !
Click to expand...
Click to collapse
Thank you. Its a lot of attention you have given this topic. For that I thank you. - Just too bad you cant find that dll. :-/ Hope some other helps.
backlight.dll found in Windows folder
axelpix said:
backlight.dll found in Windows folder
Click to expand...
Click to collapse
Thanks, for reference, there are the functions:
Code:
BKL_Close
BKL_Deinit
BKL_Init
BKL_IOControl
BKL_Open
BKL_PowerDown
BKL_PowerUp
BKL_Read
BKL_Seek
BKL_Write
inside the Backlight.dll
This has to be a lot easier.
I found some reg settings in HKCU\ControlPanel\BackLight, one of them called "AutoBklOffset". Actually this is exactly what we're searching for here: When I enter a value >0 here, the backlight instantly goes brighter, and the automatic backlight setting is still active and works.
so, what we have to do is figure out how to enter a negative value here.
Ideas?
Hmm, I don't think we can get anything only with the registry, but we don't lose anything to try, do we ?
I'll check again the registry.
Ok. Actually AutoBklOffset is linked to "Auto backlight adjust". This means that if auto backlight adjust isn't ativated, AutoBklOffset won't do anything.
Ok, all this search was fun. But I told myself: what if I just go ahead and try if the already built-in app works ?
And yea, it already works. Meaning if you put the device in front of the sun, it will go bright, and dim if you're in a dark place.
So I guess this is a configuration specific issue and don't need a new app. I'm out of tha place !
P.S.: It would have been actually quite stupid to include a Light sensor but not using it.
Scotchy49 said:
Ok, all this search was fun. But I told myself: what if I just go ahead and try if the already built-in app works ?
And yea, it already works. Meaning if you put the device in front of the sun, it will go bright, and dim if you're in a dark place.
So I guess this is a configuration specific issue and don't need a new app. I'm out of tha place !
P.S.: It would have been actually quite stupid to include a Light sensor but not using it.
Click to expand...
Click to collapse
my works fine
u can test it on bright light...u will see the change when u cover uper part oh the phone....it will dimm and u will se almost nothing...
microlomaniac said:
This has to be a lot easier.
I found some reg settings in HKCU\ControlPanel\BackLight, one of them called "AutoBklOffset". Actually this is exactly what we're searching for here: When I enter a value >0 here, the backlight instantly goes brighter, and the automatic backlight setting is still active and works.
so, what we have to do is figure out how to enter a negative value here.
Ideas?
Click to expand...
Click to collapse
This tweak still dosnt make the phone use the whole scale. From dimmest to brightest. :-/
Scotchy49 said:
Ok, all this search was fun. But I told myself: what if I just go ahead and try if the already built-in app works ?
And yea, it already works. Meaning if you put the device in front of the sun, it will go bright, and dim if you're in a dark place.
So I guess this is a configuration specific issue and don't need a new app. I'm out of tha place !
P.S.: It would have been actually quite stupid to include a Light sensor but not using it.
Click to expand...
Click to collapse
You misunderstand the issue.
With the backlight set to auto try using your phone in a completely dark room - the light sensor will detect this and the phone dims. Okay, now remove the auto setting and you will find that you can make the phone even dimmer than this using the slider. The lowest auto setting is equivalent to level 3 on the manual scale - what the guys here want to do is make this equal to level 1, or lower (or in the case of one poster make the maximum auto setting equal to the maximum manual setting, or perhaps even higher if possible).
The issue is therefore not whether or not the light sensor works (it does), or whether the phone can automatically dim/brighten the display in response to the ambient light level (it can), but whether it is possible to make the full scale range in automatic mode equal to that which the device offers in manual mode.
Mathew
Spot on!
Hi friends.
I have the problem using TomTom at car. When Diamond receive direct sun light it increases backlight until 70%, but not 100%; when I drive at night Diamond decreases backlight until 30%.
I would like adjust some values to 100% and 10% but I have no idea about registry or dlls.
aidrabmol said:
When Diamond receive direct sun light it increases backlight until 70%, but not 100%; when I drive at night Diamond decreases backlight until 30%.
I would like adjust some values to 100% and 10% but I have no idea about registry or dlls.
Click to expand...
Click to collapse
Nice summary
This exactly was the original topic of this thread.
Scotchy49 said:
Ok, all this search was fun. But I told myself: what if I just go ahead and try if the already built-in app works ?
And yea, it already works. Meaning if you put the device in front of the sun, it will go bright, and dim if you're in a dark place.
So I guess this is a configuration specific issue and don't need a new app. I'm out of tha place !
P.S.: It would have been actually quite stupid to include a Light sensor but not using it.
Click to expand...
Click to collapse
Did you come any further with the app?
I too would like to see a solution for the narrow range of light sensor adjustment. The screen stays too bright when ambient is dark.
In my Sprint CDMA Diamond, I see these registry entries:
HKEY_CURRENT_USER\ControlPanel\BackLight
LSensorReduceBKLDelay
LSensorAvegQuene
I wonder what they do. There must be some way to change the range of adjustment or the bias of the light sensor.
i remember seeing it but i cant find it.
its an app that will change the brightness of the phone depending on the time of day.
does anyone know the name of it??
'locale' can change the brightness according to the time and other things (gps/battery/etc). I think 'power manager' can too, but I haven't used it much.
Ambient Light Sensor will take a reading from the camera, and set the brightness accordingly, every time you unlock the phone.
yea thats the one i was trying to think of. its not working right now though apparently so im gunna wait for a little bit til the dev fixes it.
If you want an app that changes brightness based on time (not camera reading), timeriffic has just added that feature.
Why, hello there!
With the Cali sun rendering my Droid almost impossible to browse I come to XDA to seek advice on possible solutions to make the ability to see the screen even marginally better! (Bar a anti-glare shield) Heard there are some possible tweaks on brightening the screen beyond it's apparent '100%' brightness but am curious if this is just positive thinking?
I have been hunting on forums for tips and tricks but to no feasible avail and, 'go in the shade' falls short of answering my question!
So is there any new developments on this or is it not possible to brighten the screen to browse on a sunny day?
Much appreciated!
~L*xo
Are you rooted? If so go to the Market and download Adjbrightness app, it is free and lets you turn the screen display brightness to its Max or any other preset or custom brightness you like. You can also turn off the backlight on the touch keys. If you aren't rooted try auto setting in the display options or try an on screen widget such as the power bar widget that is stock loaded on the Droid1. Long press the homescreen, choose widget, powerbar. Hope this helped.
Thank you for Your reply!
I don't think I worded my question properly.. I meant brightening the screen beyond using an app that can adjust the brightness (I have mine set to 100% in the sun and 0% at night!)
I was hoping there was a further tweak to get the screen even brighter to browse when the sun is glarong down...if that is even possible?
Thank you so much!
.......Ohh and yes I'm rooted (LithiumMod)
Sent from my Droid using XDA App
I need some help with options in this phone. First off all I found it annoying that the bottom 4 touch button light turns off in like 5 seconds. I know it saves battery but I want to have the option to keep on longer. I'm pretty sure there isn't a built in option, but is it possible for anyone here to mod this? (I think you can do it because there is a mod to turn them always off).
Next I feel that the lowest screen brightness is still pretty high. Is there anyway that I can reduce it? Possibly through an app? I'm rooted and everything so no problem there. Thanks
Many would like the option to change the time out on the buttons. Unfortunately no fix yet.
As for the brightness, many of the widgets to adjust brightness from the market will allow lower settings
I use extended controls..I don't think it was free but is highly customizable
Hi, I love my Xperia T but there is one thing that bothers me. I noticed that every xperia T has that automatic screen dimming when viewing darker media on your screen. For example, when i turn on facebook app, before the actual app opens there is dark grey screen. During that sequence screen gets darker, and when white facebook page pops up you can actually see screen adjusting its brightness to higher "normal" level. That really bothers me especially when gaming. On dark sequences screen gets really dark, and than it takes second or two to adjust normal brightness when brighter sequences appear. You can actually see brightness going down when darker images are displayed, and then back up again when brighter images appear.
So I'm not talking about dimming when overheating or flickering (that second is fixed by jellybean update as I noticed), or etc. And before you ask me I if turned on autobrightness in display settings, it has nothing to do with that.
My question is, is there a way to turn this off because it is really annoying?
naga.nino said:
Hi, I love my Xperia T but there is one thing that bothers me. I noticed that every xperia T has that automatic screen dimming when viewing darker media on your screen. For example, when i turn on facebook app, before the actual app opens there is dark grey screen. During that sequence screen gets darker, and when white facebook page pops up you can actually see screen adjusting its brightness to higher "normal" level. That really bothers me especially when gaming. On dark sequences screen gets really dark, and than it takes second or two to adjust normal brightness when brighter sequences appear. You can actually see brightness going down when darker images are displayed, and then back up again when brighter images appear.
So I'm not talking about dimming when overheating or flickering (that second is fixed by jellybean update as I noticed), or etc. And before you ask me I if turned on autobrightness in display settings, it has nothing to do with that.
My question is, is there a way to turn this off because it is really annoying?
Click to expand...
Click to collapse
Have you unchecked adopt to lightning conditions already?
thrize45220 said:
Have you unchecked adopt to lightning conditions already?
Click to expand...
Click to collapse
Can you read my last sentence before question, please? It has apsolutely nothing to do with that. "Adopt to light conditions" means adopt to light conditions in your sourrounding, not in your screen light conditions.
naga.nino said:
Can you read my last sentence before question, please? It has apsolutely nothing to do with that. "Adopt to light conditions" means adopt to light conditions in your sourrounding, not in your screen light conditions.
Click to expand...
Click to collapse
All i thought it differs to auto brightness thats why i ask it sir. Sorry for the question then
You dont have to apologise. So, the problem is that when you watch darker images, or videos, or just any darker screen on your display, contrast and brightness goes down. And when you switch to brighter screen you can actually see, with your naked eye, brightnes going up. I see that Sony intentionally put that feature, but it is very, very stupid one. There is no point in making dark images even darker with even less contrast. I assume they wanted to achieve better black levels that way, or I don't know, but it is very stupid way of doing black levels more black. And, of course, there is no setting in settings menu tu turn this nonsense off, nice one Sony!
Re: [Q] Xperia T - screen dimming
naga.nino said:
You dont have to apologise. So, the problem is that when you watch darker images, or videos, or just any darker screen on your display, contrast and brightness goes down. And when you switch to brighter screen you can actually see, with your naked eye, brightnes going up. I see that Sony intentionally put that feature, but it is very, very stupid one. There is no point in making dark images even darker with even less contrast. I assume they wanted to achieve better black levels that way, or I don't know, but it is very stupid way of doing black levels more black. And, of course, there is no setting in settings menu tu turn this nonsense off, nice one Sony!
Click to expand...
Click to collapse
This similar annoying ass feature is there in my Spectre laptop. This was supposed to be a battery saving feature and I haven't yet found a way to turn it off. Maybe it's also a way to get higher black levels.
This is the Bravia Engine. Just unselect Settings -> Display -> Mobile Bravia Engine
thedisturbedone said:
This similar annoying ass feature is there in my Spectre laptop. This was supposed to be a battery saving feature and I haven't yet found a way to turn it off. Maybe it's also a way to get higher black levels.
Click to expand...
Click to collapse
Dude, this is definitely not a battery saving mode. There is no need for batery saving mode when displaying dark screen, and the problem occurs when displaying dark images or any other dark media, app or non-app. every single time.
Mad Marty said:
This is the Bravia Engine. Just unselect Settings -> Display -> Mobile Bravia Engine
Click to expand...
Click to collapse
OMG... Mobile bravia engine has apsolutely nothing to do with with that, because bravia engine works only in phones stock apps for viewing videos and pictures, and the effect is not even similiar to screen dimming. It brings more saturated colors and that is all.
Same problem is posted here: http://communities.sonyericsson.com/thread/61560?start=0&tstart=0 and Sony replied "I'm sorry that it has taken so long but I have done some testing now using a later software and I'm not able to replicate the issue that you guys report so I assume it's fixed." It is more than obvious that they like to close their eyes on every single problem that occurs. Thank you Sony for your gorgeous support to your beloved customers. I cant be more sarcastic, of course.
naga.nino said:
OMG... Mobile bravia engine has apsolutely nothing to do with with that, because bravia engine works only in phones stock apps for viewing videos and pictures, and the effect is not even similiar to screen dimming. It brings more saturated colors and that is all.
Click to expand...
Click to collapse
Well, have it your way. But with this kind of attitude, don't be surprised if no-one wants to help you.
Mad Marty said:
Well, have it your way. But with this kind of attitude, don't be surprised if no-one wants to help you.
Click to expand...
Click to collapse
It's not my way, it's the way it is. If one understands what mobile bravia engine is, one could never offered it as a solution to a problem that has nothing to do with it. I'm terribly sorry if I ofended you, and I apologize for my attitude. I'm not mad at you, or anybody else here, I just don't see why would one write something just to be written. I know my T-Rex wery well, and I know there is no "normal" way to turn this dimming crap off, so I posted my question here, and expected that someone of the experts would offer some kind of solution to that. And I got things like "turn automatic brightness off", or "turn mobile bravia engine off" even though I previously mentioned that i tried all that stuff. People are "trying" to "help" me here, and they didn't even read what I've written. I'm really not one of guys that would post a question here just to be posted, I searched the crap out of the internet, and I found apsolutely nothing helpfull. That's why I decided to open this thread, to hear what experts have to say.
Re: [Q] Xperia T - screen dimming
There is already a thread about this. I won't write it again.
Just turn of DLS.
peetr_ said:
There is already a thread about this. I won't write it again.
Just turn of DLS.
Click to expand...
Click to collapse
Thank you very much. I suppose you're talking about this: http://forum.xda-developers.com/showthread.php?t=1909710&page=16
My phone is rooted and I can't change those values. Can you explain me how to change this? I went to that system location via root explorer, but i can't do much from that point. If I try to open it in text editor it says that this is read only and can't be changed.
Thanx in advance.
naga.nino said:
Thank you very much. I suppose you're talking about this: http://forum.xda-developers.com/showthread.php?t=1909710&page=16
My phone is rooted and I can't change those values. Can you explain me how to change this? I went to that system location via root explorer, but i can't do much from that point. If I try to open it in text editor it says that this is read only and can't be changed.
Thanx in advance.
Click to expand...
Click to collapse
If you are rooted, you need root explorer and mount the directoty as RW, then open in text editor
peetr_ said:
There is already a thread about this. I won't write it again.
Just turn of DLS.
Click to expand...
Click to collapse
gregbradley said:
If you are rooted, you need root explorer and mount the directoty as RW, then open in text editor
Click to expand...
Click to collapse
Thank you guys very much! Changed values, and rebooting my phone...everything is fine now, no more stupid dimming. However...I noticed that color adjusment is still visible when changing from dark screen to colorfull bright one. So the dimming is now definitely gone, but that color adjusment is still visible, like it changes contrast a bit, from worse to better, it is clearly visible. Any ideas about that?
I'm uploading a video I recorded with my webcam to get you a closer look. I'll post a link once it's uploaded.
Video will be live here in a couple of minutes: http://youtu.be/fHozO8zGZ1Y
After I managed to turn off DLS, that auto-contrast thing still remains. If you look closely, you'll se that the blue facebook stripe (and everything else) slightly changes its color/contrast when returning from the gray screen. But DLS was much bigger pain in the ass and I'm very pleased with the result od turning it off.
Re: [Q] Xperia T - screen dimming
Why would you want to post it live?
Sent from your backyard...
Slender watches what you do...
-SlenderMan- said:
Why would you want to post it live?
Sent from your backyard...
Slender watches what you do...
Click to expand...
Click to collapse
Didn't mean literally live lol. It is uploaded, processed and watchable now.