NOTIFICATION BAR scrolling down without touching it: Static Electr & Capacitive Scrns
I would like to know if anyone else has experienced this at least once. I didn't post here as a thread til I got confirmation from one other DESIRE user that this has happened to him as well.
I don't know the exact triggers or even the exact scenarios, but this has happened several times to me already:
I am using the phone in horizontal mode and tapping menu items or inputting text, and my finger is nowhere even close to the Notification Bar at top of screen -- and yet suddenly the Notification Bar will auto-scroll down, interrupting what I was doing. Repeated times. It would happen again, with no accidental slippage of my finger or anything. My finger would be nowhere near the bar.
I am wondering if there is any kind of static electricity effect with capacitive screens that can set off a menu action.
So I am asking the experts here. Is that possible? Is it anything that was reported with the Nexus One?
RELATED (1): After this happened a few time in ONE SESSION using the phone -- it happened to be while uploading videos to YouTube, I wanted to test to see if I moved my finger close to the Notification Bar would this perhaps trigger this auto-scroll-down. So I moved my finger just slightly above the surface of the glass at the Notification Bar, and it didn't make it scroll down, but on this occasion, it set off a kind of jumpiness whereby the notification bar was rapidly shifting up and down a few pixels, as though it was receiving input. Has anyone seen this happen? I have not yet been able to get this to repeat from that session of using the phone a few days ago. I was lying down on my bed, and I'm pretty sure sheets produce a lot of static electricity, so this is my layman's question. Is there some causal effect here?
RELATED (2): A variation on this problem would be where I am actually trying to select a menu choice, and instead of my finger-press activating the menu item, instead the menu item jumps up slightly, and does not get selected.
This, again, happened when I was in ALBUM MODE, watched a video in horizontal display, then tapped-and-held the video to bring up the context menu that includes various SHARE options. One of those options is YouTube (the last item of the menu). I would try to select "YouTube" but the menu jumped upwards slightly, and wouldn't get selected.
I have been able to reproduce this one (Related 2) today, days later, in totally different environment .
So, a bunch of questions:
1. Is there such a thing as a static electricity effect that confuses the screen?
2. Are there other kinds of known screen-response problems that could be at play here?
3. Is this something that sounds like "it's defective so return it", or is this a somewhat common experience, sporadically?
the only time I've had that happen to me is when I use a cheap charger I've got and yeah the screen just skitses out. I am using a hero tho but this is the first time I've seen anyone else encounter this so I thought il'd churp in.
I had something similar only once.
The notification bar went mad. It was flicking up and down constantly without me touching the phone at all.
I had to pull the battery to fix the problem.
Hasn't happened since.
Fon22
Happened to me also when loading a ROM in Nesoid.
So I'm not sensing any concerns re; any defect... but still wondering, since I don't know the physics of capacitive screens... Is static electricity the culprit? Never happened once on my GSM HERO... so something is at play here.. or is it an intermittent defect that rarely shows up?
quicksite said:
So I'm not sensing any concerns re; any defect... but still wondering, since I don't know the physics of capacitive screens... Is static electricity the culprit? Never happened once on my GSM HERO... so something is at play here.. or is it an intermittent defect that rarely shows up?
Click to expand...
Click to collapse
The capacitive touch screens work by detecting a disturbance in the EM field on the glass surface. There's a few ways to do it, I think the way mobile phones are doing this is to put a field of their own over the glass and detect fingers on the surface based on what levels of the field they'd expect to see at different points around the screen, and doing some comparisons on what levels are actually detected.
Please someone correct me if I'm wrong BTW.
I've noticed this notification bar problem today and yesterday. Lucky I at least saw how I caused it. My finger was to close to the top right of the screen because of the way I was holding the handset. That combined with the lacklustre multi-touch support on this handset made the phone detect it as a finger swipe that rapidly moved downwards.
I've always had similar problems with capacitative and inductive touch technologies. I don't actually need to touch the desires screen to activate a touch. The worsted was the Zen Micro with the touch controls. I could activate that thing from about 10-15mm away. The touch on-off-dimming lamps too. I usually cycle those through all their light levels with a single touch. Where as my brother actually struggles to activate those, really has to press his hand down hard on them.
Brilliant, Alex... You got right inside my head and answered exactly what i was trying to ask.... the physics of the system.
I'm okay with little glitches here and there, and I am sure I will learn to avoid proximity issues that tend to trigger these mis-fires... just as I learned to adjust my tap-key behavior in typing on the on-screen keyboard on capacitive screen vs all the resistive screens I had used before on Windows Mobile, where fingernails could & would engage the resistive screen -- vs learning that the bottom surface of the finger has to make contact on the keys on capacitive screen... (sorry i am USA and we still resist the world's metric standard, so i don't know the equivalent distance in cm,)... but it's over a 1/4-inch of an upward shift in the position of one's fingers above the capacitive screen from the tip of the fingernail.
But once you train your senses to activate the keys sensors properly, the finger impact behaviors of resistive screens goes away after a while (at least for me)
(oh, btw, I ordered the new HTC capacitive stylus which is a couple of months old now, but is an official DESIRE accessory, so that will be an interesting experience... the thing i miss most about the resistive screen and stylus was being able to scribble notes really fast, way faster than i could ever type -- and draw pretty detailed images or maps and directuions for people. so it will be interesting to see the granularity of control the capacitive stylus will give)
So thanks very much for giving me the exact level of detail I can process as a lay person.. and for assuring me, as the rest of you have as well, that this apparently comes with the territory of this phone -- and therefore should not be seen as a defect. Because i sure as hell didn't want to go shipping this phone back. I can live with an occasional spazzoid misread of intended impact spot on screen...
And, fnally, this was funny -- re the different degree of touch we all consider "normal" --
The touch on-off-dimming lamps too. I usually cycle those through all their light levels with a single touch. Where as my brother actually struggles to activate those, really has to press his hand down hard on them.
Click to expand...
Click to collapse
thanks!
Alex_w said:
The capacitive touch screens work by detecting a disturbance in the EM field on the glass surface. There's a few ways to do it, I think the way mobile phones are doing this is to put a field of their own over the glass and detect fingers on the surface based on what levels of the field they'd expect to see at different points around the screen, and doing some comparisons on what levels are actually detected.
Please someone correct me if I'm wrong BTW.
I've noticed this notification bar problem today and yesterday. Lucky I at least saw how I caused it. My finger was to close to the top right of the screen because of the way I was holding the handset. That combined with the lacklustre multi-touch support on this handset made the phone detect it as a finger swipe that rapidly moved downwards.
I've always had similar problems with capacitative and inductive touch technologies. I don't actually need to touch the desires screen to activate a touch. The worsted was the Zen Micro with the touch controls. I could activate that thing from about 10-15mm away. The touch on-off-dimming lamps too. I usually cycle those through all their light levels with a single touch. Where as my brother actually struggles to activate those, really has to press his hand down hard on them.
Click to expand...
Click to collapse
I was thinking it is softwarerelated. The bar remains halfway the screen, is in the layer below the active app, and jumps to front upon touching the screen.
I have the Problem, too. And that since Monday. I went mad since yesterday evening so i tried to go back to stock, unroot and all.
But the problem is still there.
How can i fix it? Or is my Phone damaged?!
The Notification Bar scrolls down without touching the display and then freezes the phone. so i must lock the phone and relock it and then i can use the phone but after a short time the same problem came back!!
So I reckon you're an undertaker for a living?
Sent from my HTC Desire using Tapatalk 2
erklat said:
So I reckon you're an undertaker for a living?
Click to expand...
Click to collapse
Sorry but i don't understand what you mean
The problem makes me crazy because i have now the stock rom because i thougt it was an issue due a custom rom or a kernel or something.
If you can help me please do that, this problem robs me to sleep
But i havent the Desire. I Have the HTC EVO 3D GSM
19Marc89 said:
Sorry but i don't understand what you mean
Click to expand...
Click to collapse
lol digging up the dead
Sent from my HTC Desire
Sorry but I do not understand the background of your information which is in context with my problem of the notification bar.
@19Marc89 He meant that you responded to a an old (dead) post. Listen, I'm trying to recondition an old Motorola Milestone (Droid) with a crazy touchscreen problem, whose cause I believe I've narrowed down to static electricity - can you do me a favor and try stroking the glass side of the phone lengthwise in one direction down your sleeve, preferably if you have a wool sweater on? Call me crazy, but this works for me, at least temporarily. I posted more here:
http://forum.xda-developers.com/showthread.php?t=1041943&page=5
install gravitybox. go to >statusbar tweaks>disable peek. click it. problem solved!
quicksite said:
I would like to know if anyone else has experienced this at least once. I didn't post here as a thread til I got confirmation from one other DESIRE user that this has happened to him as well.
I don't know the exact triggers or even the exact scenarios, but this has happened several times to me already:
I am using the phone in horizontal mode and tapping menu items or inputting text, and my finger is nowhere even close to the Notification Bar at top of screen -- and yet suddenly the Notification Bar will auto-scroll down, interrupting what I was doing. Repeated times. It would happen again, with no accidental slippage of my finger or anything. My finger would be nowhere near the bar.
I am wondering if there is any kind of static electricity effect with capacitive screens that can set off a menu action.
So I am asking the experts here. Is that possible? Is it anything that was reported with the Nexus One?
RELATED (1): After this happened a few time in ONE SESSION using the phone -- it happened to be while uploading videos to YouTube, I wanted to test to see if I moved my finger close to the Notification Bar would this perhaps trigger this auto-scroll-down. So I moved my finger just slightly above the surface of the glass at the Notification Bar, and it didn't make it scroll down, but on this occasion, it set off a kind of jumpiness whereby the notification bar was rapidly shifting up and down a few pixels, as though it was receiving input. Has anyone seen this happen? I have not yet been able to get this to repeat from that session of using the phone a few days ago. I was lying down on my bed, and I'm pretty sure sheets produce a lot of static electricity, so this is my layman's question. Is there some causal effect here?
RELATED (2): A variation on this problem would be where I am actually trying to select a menu choice, and instead of my finger-press activating the menu item, instead the menu item jumps up slightly, and does not get selected.
This, again, happened when I was in ALBUM MODE, watched a video in horizontal display, then tapped-and-held the video to bring up the context menu that includes various SHARE options. One of those options is YouTube (the last item of the menu). I would try to select "YouTube" but the menu jumped upwards slightly, and wouldn't get selected.
I have been able to reproduce this one (Related 2) today, days later, in totally different environment .
So, a bunch of questions:
1. Is there such a thing as a static electricity effect that confuses the screen?
2. Are there other kinds of known screen-response problems that could be at play here?
3. Is this something that sounds like "it's defective so return it", or is this a somewhat common experience, sporadically?
Click to expand...
Click to collapse
REPLY :
install gravitybox. go to >statusbar tweaks>disable peek. click it. problem solved!
I know I am many years late but did you somehow manage to solve this problem?
Hello,
I just noticed a couple of days ago that a section of my screen has become slighly unresponsive. It appears to be intermittent, and Swype in Landscape mode is primarily affected.
In landscape mode, keys m, j, and u are not responding. During shutdown as well, the power off confirmation both yes and no button locations are unresponsive.
These areas of the screen are responsive usually, except during power off confirmation and using Swype. Could this be a software issue?
Does anyone know what might be the cause, or how to fix it?
I have not yet tried any fixes, though I may just restore using a backup ROM I made shortly after I rooted my device. If that doesn't work... then :|
EDIT: This appears to have started shortly after I installed LauncherPro, or it may have also occurred since I removed all pre-loaded Google Apps to replace with the newest versions off the Market. :\
EDIT 2: Restored my ROM, m key has regained some responsiveness, other keys no good. Using Swype, the line goes near them, and then just breaks, sometimes. Other times, if I swype really fast, I can passover and include the key, but cannot swype up vertically among them. Unable to press them directly either.
Switch to Android keyboard and things seem to be ok again... fully responsive... this is weird.
EDIT 3: Crap... one row in the middle seems to be affected... somewhat. Downloaded a drawing app, and this one row doesn't want to play nice. It responds properly in most instances, yet there definitely seems to be a problem.
EDIT 4: Appears that a section of my screen is non-responsive. A whole row. Argh. When I move shortcuts, passing nearby this 'dead row' the icons jump. In swype, it acts like an invisible barrier, either I move really fast and it sorta jumps across that key, or I move really slow, and it's like my finger is lifted off the screen. Android appears to be compensating heavily for the non-responsive section and guessing my inputs. Tapping in this area still appears to be somewhat responsive, dragging or swiping across this area is producing very mix to bad results.
I need to have the touchscreen/digitizer replaced, right? The LCD panel appears to have no issue. Argh. Could it be due to the InvisibleShield I put on top?
I had a similar problem with my G2. I tried putting one of the Zagg protective covers on it and immediately afterwards the touchscreen would not respond properly. I would have dead spots on top right of screen and bottom left. At first I thought it might have been from the solution seeping into the phone, but I think I might have used too much pressure and damaged the digitizer. I ordered one earlier this week and will update you with my results.
The screen is capacitive... which means that your finger completes an ELECTRICAL CIRCUIT. If your screen protector is blocking current at all, this will manifest as a loss of sensitivity.
The second thing to understand is that you can't just touch the screen with your finger to complete the circuit, the other end of the circuit has to be completed as well. The metal ring around the screen is the other side of the circuit! You need to be touching that metal ring in order for it to work properly. Even with the phone just resting on your hand, you may not be contacting the ring and may experience a loss of sensitivity. In portrait mode, try clamping your fingers around the back of the phone to contact the ring on the far side. In landscape mode, use your index fingers to touch the top part of the ring.
If these suggestions don't help (including removing the screen protector), then you most likely have a bad digitizer. Check the ribbon wires to make sure that they haven't pulled out at all before replacing.
Just replaced my digitizer and it works great now.
Sent from my Nexus One using XDA App
johntinman said:
Just replaced my digitizer and it works great now.
Sent from my Nexus One using XDA App
Click to expand...
Click to collapse
The one u bought is it the one with t mobile with it??
Sent from my HTC Vision using XDA App
Yes, i got it from repairsuniverse.com for ~ $70
Sent from my HTC Desire using XDA App
Hey guys, I've got two problems with my unrooted stock HOX , which both are touchscreen related
1. When I push a little harder on the upper right corner of the touchscreen while in lockscreen, the diplay recognizes 3 other inputs on the left side of the screen (all of them about 2cm apart from one another, sometimes there are even more inputs randomly placed) which are slightly shaking but always appear in the same places. When this occurs, the display doesn't recognize any other inputs for about 4-5 seconds, then the 3 faulty inputs disappear and touchscreen works again. Okay, this could be of the harder pressure but the thing is, that when I'm doing the same in my homescreen or somewhere else, it doesn't happen. The problem with this occurrence is, that I often can't unlock my phone immediately and it also appears when I get an incoming call, so I am unable to answer it the green circle won't react on my input. But the fact, that it only occurs in lockscreen makes me wonder if it could be a simple software error and not hardware.
2. Sometimes (usually in combination with problem number 1) a part of the diplay doesn't react to any input whatsoever, but the rest of the screen does. I usually recognized that while typing messages and the area affected is an about 1cm high horizontal strip which is located in the height of the letter A in the portrait keyboard and goes all over to the letter L (I hope you understand what I mean ). I made it visible via a painting programm and it's a perfectly straight area. But when I now turn the display off and on, everything is fine again, so this makes me think (and hope) that this is a software error too.
I tried factory resetting but this wouldn't work out, at least the first problem still occurs (did the reset yesterday, so I can't rule out, that the second one still exists). I don't want to send my HOX in again, because this one is apart from that very nice and has no other faults.
So the main question is: soft or hardware and what could I do against this?
Hope you guys can help!
Hey, I've looked in many places. My Dad has my old UK HTC M8 phone. Prior to giving it to him I updated to the final update 6.12.401.4 (Android 6.0).
We can't seem to pull down the quick menu from the top of the screen.
When the back - home and switch shortcuts are at the top of the screen they don't work.
In settings like Wifi or Bluetooth Settings I cannot toggle it on/off in there.
The strange part is that the top of the screen or those areas of the screen respond to certain actions. Swipes to change page. Pressing to open the clock. Pressing the Search icon in settings.
When using diagnostics there's about 1cm at the top of the screen I can't paint.
I'd just really like some advice as to what I can do about this, and whether there's any option available to resolve this. It hasn't been dropped or fried.
I had the exact same problem 1 week ago - well althoug I was not very comfortable with it, I bought a new screen on Amazon and replaced the old one (additionally replaced battery).
Problem has been resolved now, and screen works just fine. (50$ screen)
I do not know about your device but try entering the recovery and see if the touchscreen works there - if it works, you just have to do a factory reset instead of doing a full screen replacement.
I initially followed the iFixIt guide but I could not remove the headphone jack, therefore a executed a full disassembly (search on youtube, cannot post links yet; video is 19:30 min long and from Fixez.com) - just keep in mind to not throw the protective tape away and use A LOT of adhesive tape / glue when fixing the new screen.
Hope this helps! Have a nice day!
After installing a new display module on my OP5T, I noticed something weird. The display seems to be perfect, either original or a very good one. Bright, perfect color, no issues with it whatsoever. I've tested it in multiple apps (like Draw on screen) and it works perfectly, recognizing every input, never interrupting the line while I drag. All the buttons I press on the screen in apps work perfectly. When typing letter never gets missed.
However, it does have a SLIGHLY less sensitive touch. Like, if you very lightly tap it with a finger, it won't register, while before, it would. The difference really is miniscule. I usually wouldn't tap that lightly on it either way. However, it works up to be an annoyance, because now certain "swipe left-right" actions lack a certain "inertia" to them, which I think is because of this.
Like, before, to move around the launcher screens, I would just swipe sideways lightly and carelessly and it would switch to the next screen, now it will start moving and roll back. To make sure I switch a screen I have to apply effort with my finger. Same thing with opening notifications or app drawer.
Is this a hardware issue? Faulty touch? Or can I just increase sensitivity a bit with some software tweaking?
dude i am also in the same boat. Did u by any chance buy the replacement screen from lcdbaba?