I notice this in opera, and today in the facebook app too, and was really baffled. The effect is quite subtle, but repeatable. When moving my finger around the screen, eg on the bbc news website panning to the top left, my screen dims. It stays dim when I remove my finger, and brightens again when I pan back down to the right.
Weird, huh?
So far it's just a curiosity and not an annoyance. Has anyone else seen this?
So I am not the only one who noticed this. I sometimes find this behaviour a bit annoying, especially in low light.
The phone has an ambient light sensor. It is adjusting because you are causing a shadow over it.
You can probably turn it off
Under the power settings/backlight - auto adjust backlight. Just uncheck it.
Any idea where the sensor is located?
Do you really think it is the ambient/light sensor? I sure don't. Scrolling through different websites I can easily reproduce this:
You scroll from one point to another, this just has to be a couple of pixels, and the screen adjusts the brightness. That is within a room with a fixed source of light and I am keeping my body as constant as possible to avoid the shadowing.
Scrolling from point A to point B makes the backlight adjust itself, even without casting any shadows or similar. Scrolling back from B to A makes the backlight instantly adjust itself back.
It's your finger causing the shadow, not your body. If you introduce an object into an ambient light source, you will find that said object will reduce the ambient light by a percentage due to partial or total obstruction. The light sensor is detecting this percentage and adjusting the screen accordingly.
The sensor itself is somewhere near the speaker.
I'm pretty sure this doen't have anything to do with the light sensor UNLESS it's cause by the screen itself becoming brighter and this registering on the light sensor, eg internal light leak.
My best guess is that it's connected to the presence/absence of certain colours on the screen, and is related to the video driver. Next time I get it I'll see if I can reproduce when scrolling via the kbd, to eliminate the theories about casting shadows on the screen.
This is not FINGER SHADOW!!!
You can notice this same thing when you plaing Solitare cards and using Stylus.
I'm sure i did't do any shadows and anyway when i pick up any card and moving aroud screen u can notice screen brighting up and down.
Using Opera 9.5, on this site http://game-board.blogspot.com/2008/05/alternative-monopoly-rules-and-game.html zoom in with double-click, scroll about half way down to the paragraph beginning "property has too much pollution on it", then scroll up and down and notice the change in screen brightness. please post if you can repeat. it does not work with the keyboard.
btw, does anyone know monopoly "bloodbath" alternative rules?
I've noticed my screen doing this without causing any shadows & without even touching the screen at all, like a 'breathing effect' when it is completely idle. I think it has something to do with light sensor polling interval which is editable via the registry, advance config and HD tweak...but since I flashed NRGZ ROM (21/08/09 build) this issue has gone anyway.
Related
I've been wondering, would it be possible to make an app that kicks in when you're on a call, that uses the light sensor as a proximity sensor.
The basic idea is, you put the phone to your ear, it blocks light and the screen locks, take it away from your ear, it detects more light, and unlocks the screen so you can enter numbers etc.
I was also thinking instead of being set at specific light levels (less than 50 for off, over 50 for on etc) it could work on a factor of relative brightness, so if it gets 5 times brighter it knows to unlock the screen.
Does this sound possible?
I don't think this can work. What happens during the night?
very old idea
phone must have bio sensor near speaker which touch to ear, so only hardware solving
using light sensor will work only with light, at dark place\time it doesnt work
another way is to make sensitive top of sensor display for touching but other part of display must be blocked
deadend
Tha X1 speaker is right next to the earpice, it's almost part of it, that's why gave me the idea.+As for dark places, that's why I suggested it measures a differennce in brightness, rather than specific values. Obviously at a certain point, it won't detect any change, I guess then the programdetect darkness up until the point of answering the call, and disable itself.
Or maybe there's a way to use the backlight to create a lightsource but have the touch part off...
Brightness would increase as the phone approached the ear, then drop off as it got there, then similar when you take it away.
Actually, based on the intention, I think it would be sufficient if the phone app is active, the screen is on and locked if phone app is inactive. Touching cheeks, etc are all not real problems in my opinion.
xperia tweak
xperiatweak will fix this issue.
I couldn't find the original thread about this, so I'm making a new one
http://dl.dropbox.com/u/71410276/VIDEO0004.3gp
Theres a video where i film after the 1.28 patch, and as you can see the top isnt making that weird thing anymore, Its just the screen flickering or how i should call it.
You barely see it, but you can see in the video that theres something happening when im moving up and down.
i think the problem is by the ambient light sensor beside the hTC logo
so when your fingertip pass thru the sensor, the light enter reduce so it become brighter...
_______________________________________
What is an ambient light sensor on a monitor?
It Is A Sensor That Detect Light So If Its Dark Your Screen Monitor Brightness Will dim down so you're not looking at one source of extreme bright light, When Its Bright The Screen Monitor Will go up to compensate for the extra light around you so you can still see the monitor comfortably
Reference from http://wiki.answers.com/Q/What_is_an_ambient_light_sensor_on_a_monitor
tabobaby said:
i think the problem is by the ambient light sensor beside the hTC logo
so when your fingertip pass thru the sensor, the light enter reduce so it become brighter...
_______________________________________
What is an ambient light sensor on a monitor?
It Is A Sensor That Detect Light So If Its Dark Your Screen Monitor Brightness Will dim down so you're not looking at one source of extreme bright light, When Its Bright The Screen Monitor Will go up to compensate for the extra light around you so you can still see the monitor comfortably
Reference from http://wiki.answers.com/Q/What_is_an_ambient_light_sensor_on_a_monitor
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No, that's not it. It's a software bug, the fixed it just a little. It's probably driver problems still. If it was the light sensor it would just dim, not blink.
still the bug is there.. but less than before.. mine screen flickers (not the screen flicking bug) when the bug hits.. just in an instance.. and distorted the date a little than before.. updated to 1.28.415.9 Arabic version
Well mine still makes the thing where everything in the bar gets all blurry.
Just not as often.
So the bug is still there but they sure did something to improve it
Edit: yeah ayan15 did a good description of my bug
Sent from my HTC One X using XDA
I've noticed on my Nexus 7 that the screen will alter the brightness pretty frequently even when I'm sitting in the same place and the ambient light level around me hasn't changed. It will dim a little bit and then brighten a little bit several times while I'm just sitting there reading. It's most noticeable on a white background but it can be seen at other times too.
I'm pretty sure I'm not blocking the ambient light sensor with my hand unless there is a sensor on the bottom of the device. I've also confirmed that there isn't anything wrong with the screen by turning off auto-brightness and the screen no longer brightens or dims after that.
Anyone else think auto-brightness is too sensitive?
It could be anything. I'm sitting in a room right now where a window is about 3 feet behind me and about a foot to my left. If I rotate my device just a tiny bit it towards the window, it becomes enough to brighten my device. Then if I rotate it back to its normal position, the brightness goes back down. It's pretty sensitive.
Are you in a room with windows? Perhaps the sun is going behind a cloud or something and coming back out.
Yes there is a window but this was at night and I had a lamp on beside me. I was being very careful not to turn the N7. At this point I've just turned off auto brightness because its distracting.
I've seen a couple posts about delays with adaptive brightness, but this is a different item. I'm seeing that the adaptive brightness alters the brightness a little too dramatically. In a somewhat dark room (not pitch black) the brightness will be at absolute minimum even when the brightness is about 1/3 up on the slider. In a moderately bright room that same brightness setting will be near maximum.
Does anyone else notice this as an issue? I'm just wondering if it's normal (ie, software calibration issue) or if the brightness sensor might not be seated correctly.
It's normal. Or at least it sounds like it is working the same way mine is. And yes, IMO it is a little too sensitive. The Lux app works beautifully if you want an alternative. Also, the goog is known for tweaking this feature over time with updates.
I've noticed this too. The biggest thing for me is walking down the street at dusk (so not dark out yet) I can't read the screen as it turns it all the way down, then, when I walk under a street light, it turns it all the way up to full! It's one extreme or the other, there seems to be no middle ground.
In other words "adaptive brightness has mind of its own!"
This is why I have always kept this setting off. The brightness just changing on its own always annoyed me.
When it works properly (and it should) for ones uses, it's great, it's automatic, what's not to like? It's a pita to always have to change brightness manually just to see a phone display depending on ambient lighting which varies immensely for many users.
jbdan said:
When it works properly (and it should) for ones uses, it's great, it's automatic, what's not to like? It's a pita to always have to change brightness manually just to see a phone display depending on ambient lighting which varies immensely for many users.
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Click to collapse
I agree. I have it set to maybe around 15-20% (centered over the WiFi symbol below it) and I never need to touch it. Gets dark enough for night driving and bright enough to read outside. Never found it stuck on one or the other when it shouldn't be.
Sent from my Nexus 5X using Tapatalk
If you buy the app Lux you can customize how it adapts your brightness. The free version is good to but you have to use mostly default settings. By default it only adapts brightness when the screen turns on.
Guys how are you doing? I'm having a strange issue with my phone, i've searched the forum about it but couldn't find anything about it other than a couple of messages without any conclusion. This problem is mostly noticeable when having the screen in minimum brightness, it's like the backlight flickers a bit. If writing an SMS for example, whenever you press a keyboard key the screen flickers (it's very faint but noticeable). Also, when you open any app, it's like the brightness goes up a bit and down again, it's a very strange issue. Is anyone having this problem? Seems to be a software glitch because if you leave the phone in a static screen, that doesn't happen. It's updated to the latest fw version btw, it always happened.
To make it clear (and if anyone wants to try it), this happens with auto brightness, and the slider set to the minimum in a dark condition, whenever the brightness is medium/high at least i can't notice it.