sometimes my phones touchscreen becomes unresponsive when its flat on its back on a table for example. I unlock the screen with the trackpad or power button so that the screen comes on. Then when i try to slide the lockscreen it doesnt do anything. When i begin sliding the bar from the total edge of the screen it sometimes works.
Usually i just have to pick up the phone to get the touchscreen working again. actually, when i even lift up the phone the slightest bit, it works again.
Weird right?
anyone else experiences this issue ?
I assumed it was designed to work like this. Makes me move my phone rather than just slide to snooze the alarm then go back to sleep.
Same here. I think it has to do with the capacative toucscreen.
Sent from my HTC Vision using XDA App
wileykat said:
I assumed it was designed to work like this. Makes me move my phone rather than just slide to snooze the alarm then go back to sleep.
Click to expand...
Click to collapse
you're saying you move your phone to snooze the alarm? didnt know it could do that, gonna try that out tomorrow morning
forgot to mention the issue is not ROM specific. I have witnessed it on virtuous, CM, MIUI, stock
Ive had this problem as well. Slightly annoying!
I don't think its a design issue..
you don't have to lift your phone to get the screen to respond.
notice that it is enough just to touch the body of the phone to make the screen responsive again..
for me its very annoying, especially not being able to snooze the alarm in the morning
Let me point out that this happens with my G1 also so its not just the G2.
Yeah, there are a few discussions about this on the forums already. It's most likely a capacitance issue. When your phone is just sitting on a table and you touch the display, you may not create enough capacitance with the touchscreen for it to register as a touch (as opposed to resistive touchscreens which needed only physical contact but were less accurate as a result). Touching the body of the phone basically creates a common ground or voltage reference point for the phone, allowing your finger to create the needed amount of capacitance (in technical terms, no longer a floating ground). Whenever I touch the screen while the phone is lying on a table, I just always make sure to rest either my thumb or ring finger on one of the edges.
A lot of factors will also come into play---whether or not your phone is in a case, type of material the phone is resting on, the level of humidity in the air, even potentially the type of shoes you are wearing. This is why sometimes it works and sometimes it doesn't.
ianmcquinn said:
(...) Touching the body of the phone basically creates a common ground or voltage reference point for the phone, allowing your finger to create the needed amount of capacitance (in technical terms, no longer a floating ground). (...)
Click to expand...
Click to collapse
yes! I just figured this out myself. merely touching the body of the phone makes the screen respond to my fingers.
well in that case its not really a big problem. from now on i just touch teh body with my middle finger while sliding with my index finger =D
liory said:
notice that it is enough just to touch the body of the phone to make the screen responsive again..
for me its very annoying, especially not being able to snooze the alarm in the morning
Click to expand...
Click to collapse
Will give this a go tomorrow, I hope it doesn't work!!!.... I'm gonna be forever snoozing with 2 fingers now!!!
This seems to be temperature related (and it doesn't happen on a mytouch 3g)
I live in Minnesota and I deliver pizza. When I would need to call a customer to get into an apartment building, I would set the phone on top of the pizza bag and dial with one hand.
When I first got my G2 (early november) I had no problems doing this, then one day it wouldn't respond at all to touch. I still had my old mytouch 3g with me because the old number wasn't ported yet, and I was able to use that to make the call. It wasn't until later that I realized that the problem was caused by the cold and that I needed to touch the metal part to make it work, so I thought that the touchscreen on my 2 week old G2 had just died.
At room temperature the touch screen always works (I can silence the alarm while it's sitting on the table), but temperatures below 50F cause problems
I started noticing this as well. Sometimes I'll hit the power button to turn my phone on from idle-state and then I'll drag the unlock button with to no avail! But then again, I do use my thumb to do it so maybe the capacitance by using the thumb isn't good enough to unlock it.
I use my phone at work a lot so in order to text while being discreet, I usually have the phone in my right hand and text / unlock the phone using my thumb. I doubt it is a defect but it had me worried too. Guess I'm not the only one experiencing this. (Although I must say, dragging my thumb to swype and using the side of my thumb probably is the reason why it sometimes doesn't work)
Back when I had my g1 it did the same thing and experience this on my g2....if its laying down its like it thinks its just on in your pocket so the touch seems limited
Sent from my T-Mobile G2 using XDA App
Elegy said:
sometimes my phones touchscreen becomes unresponsive when its flat on its back on a table for example. I unlock the screen with the trackpad or power button so that the screen comes on. Then when i try to slide the lockscreen it doesnt do anything. When i begin sliding the bar from the total edge of the screen it sometimes works.
Usually i just have to pick up the phone to get the touchscreen working again. actually, when i even lift up the phone the slightest bit, it works again.
Weird right?
anyone else experiences this issue ?
Click to expand...
Click to collapse
Not weird. TOTALLY normal and expected.
It is because it has a CAPACITIVE TOUCHSCREEN.
This means that when you touch the screen, your finger is actually COMPLETING AN ELECTRIC CIRCUIT.
When the phone is lying on a table and you touch it, you are NOT completing the circuit since you are NOT touching the phone's body.
When the sensor is on, there is an electrical difference between the surface of the screen and the body of the phone. When you touch BOTH, you alter the electric field in that localized area of the screen. The sensor detects the change in voltage and determines the location of the contact.
dhkr123 said:
Not weird. TOTALLY normal and expected.
It is because it has a CAPACITIVE TOUCHSCREEN.
This means that when you touch the screen, your finger is actually COMPLETING AN ELECTRIC CIRCUIT.
When the phone is lying on a table and you touch it, you are NOT completing the circuit since you are NOT touching the phone's body.
When the sensor is on, there is an electrical difference between the surface of the screen and the body of the phone. When you touch BOTH, you alter the electric field in that localized area of the screen. The sensor detects the change in voltage and determines the location of the contact.
Click to expand...
Click to collapse
So how do I adjust the sensitivity? As I understand it I could increase the voltage to the screen making it easier to complete the circuit...such as through thin gloves.....
Sent from my HTC Vision using XDA App
dhkr123 said:
Not weird. TOTALLY normal and expected.
It is because it has a CAPACITIVE TOUCHSCREEN.
This means that when you touch the screen, your finger is actually COMPLETING AN ELECTRIC CIRCUIT.
When the phone is lying on a table and you touch it, you are NOT completing the circuit since you are NOT touching the phone's body.
When the sensor is on, there is an electrical difference between the surface of the screen and the body of the phone. When you touch BOTH, you alter the electric field in that localized area of the screen. The sensor detects the change in voltage and determines the location of the contact.
Click to expand...
Click to collapse
This is mostly true.
Put the phone on the table and dont touch it and try to swipe to unlock.
No touch a finger on the phone body and do it again, itll work.
Doesn't seem to always fit that behavior, but more often than not.
TheNewGuy said:
So how do I adjust the sensitivity? As I understand it I could increase the voltage to the screen making it easier to complete the circuit...such as through thin gloves.....
Click to expand...
Click to collapse
You don't. You should NOT even if you could. It would not work as you expect since it is NOT a matter of sensitivity, but of CONDUCTIVITY.
klmsu19 said:
This is mostly true.
Put the phone on the table and dont touch it and try to swipe to unlock.
No touch a finger on the phone body and do it again, itll work.
Doesn't seem to always fit that behavior, but more often than not.
Click to expand...
Click to collapse
It is not "mostly" true, it is PRECISELY true.
dhkr123 said:
It is not "mostly" true, it is PRECISELY true.
Click to expand...
Click to collapse
No reason for the condescending tone in every post (or if it's not your intention to be condescending, you may want to restrain your constant use of caps). You had stated:
dhkr123 said:
This means that when you touch the screen, your finger is actually COMPLETING AN ELECTRIC CIRCUIT.
When the phone is lying on a table and you touch it, you are NOT completing the circuit since you are NOT touching the phone's body.
Click to expand...
Click to collapse
Someone was just pointing out that if this was "precisely" true as you put it, then the screen should never be responsive if you aren't touching the phone's body (since the circuit is, based on your reasoning, still broken). This isn't the case though since it does work sometimes. How could your statement be precisely true if it's known to be false sometimes (hence the "mostly true" comment)?
And it's actually not true. You are not completing an electric circuit. No current flows from your finger into the screen and no components within the phone are electrically coupled because of your touch. As you stated, you are altering the electric field when you touch the screen. This results in a change in capacitance in that area. Note, this change occurs even when you are not touching the phone's body, just to a different degree. Touching the phone will typically increase the amount of capacitance as opposed to when you are not though (since you are basically "grounding" yourself to the phone). The more capacitance there is, the easier it is to measure. If there is too little capacitance, the touchscreen's microcontroller will not register the change at all. Even if it does register the change, there will be additional filtering that occurs to that raw data either in the microcontroller itself or in software (or both).
This is why the screen works sometimes when you touch it without touching the rest of the phone. You are still causing a change in capacitance. The amount of change depends on numerous factors (this is what I stated in an earlier post). These factors effect how grounded both you and the phone are relative to earth ground (in the electrical sense, not geographical). Typically speaking though, if you are relatively close to earth ground, then you will be able to use the screen without touching the body of the phone. For example, someone stated earlier that the screen doesn't work when it's cold. Cold weather results in lower humidity/drier air and you being less grounded (basically why people see an increase in static electricity as well). Chances are that the touchscreen would work again without the touching the phone's body if you had physically been touching a large piece of metal with your other hand (to help ground you).
So in response to the other question posed, yes, technically by raising the voltage level to the touchscreen, it may result in a more sensitive screen since there will be a larger increase in capacitance when you touch it. It may also reduce the life of the touchscreen though, if not damage it completely, so not a good idea. It would be better to figure out the filtering mechanism if possible and adjust that in software. Not sure if any devs have looked into it (though my guess is that if it was simple, it would have been done already).
I am so happy I found this thread..
Lately I thought my touchscreen was broken because I was unable to snooze my alarm in the morning (just as some of you seem to have been trying to do).
I think it's temperature related as suggested by the person who mentioned pizza delivery.. and I think this because it only happens on mornings where I've left the bedroom window open and it's very cool. My phone is often on a cold wooden surface. however even picking up the phone doesn't seem to help (I'll have to pay more attention next time) but after a few moments of struggling it eventually works (probably warms up in my hand and gets a better circuit).
I can also vouch that the screen works great with just a single finger on a flat surface, provided it's room temperature. I don't need to touch the body at all, and I do this a lot without issues (aside from cold mornings waking up to my alarm).
Related
After owning the Touch HD for a full month I just noticed that down the middle of the screen there is something which I can best describe as an oil stain. It looks as if there is a liquid in between the glass/plastic screen and the resistive layer that lays on top of it.
The screen works normally and this "stain" can only be observed if I look at how the light reflects of it.
Any idea what happened?
Hi,
I have a small idear. The TFT-Monitor ist touching your Touchscreen. Probeply you pressed something on your HD, that the two Monitor touch each other, that is why it looks like a Water or Oil spot.
This can happen for example, if you are carrying your HD in your trouser pocket.
If you want to try to remove this spot, you have to turn with your both hand the hd, like the right hand turn with the clock and the left hand turn to the other way.
Sorry, my english is not very good for such a discribing. What I mean is like "to contort" or "to skew (up)". But you have to be very carefully. Before you start, remove the Battery
(I'll be incorporating a clearer explanation along the lines of what Dude10 was trying to say)
The effect you're seeing is IDENTICAL to what causes the colours to appear on an oil film actually!
The way the Touch HD screen works is to have the hard glass (polycarbonate plastic actually as far as I'm aware, but that's not important here!) with a squashy resistive sensor layer on the top.
This resistive layer detects touch as an increase in resistance at the spot that's compressed - be that by a finger or a stylus. Because the upper layer can be compressed, it can also be malformed by stronger than normal pressure, such as an object in a pocket. The effect can be more pronounced if your body heat warms up the screen surface making the screen "set" in position rather than spring back as it should do...
The "oil" effect is cause by the reflections of light from the outermost plastic layer and the outermost surface of the hard screen. When the gap is small enough, these reflections can interfere with each other, cancelling and re-inforcing different wavelengths depending on the thickness - hence the tapering of the screen from thinnest to thickest results in a "rainbow"
Now, why explain all this you may ask? Partly because I like science and it fascinated me in school to learn what caused that effect so wanted to share this! (And this also explains why it only presents itself when you look at the light reflections)
Anyway, more importantly, the solution to your problem is to restore the thickness of that part of the touch layer to it's original uncompressed state.
I'd firstly start trying to hold your finger flat against the top of the phone screen (on flat surface, portraint orientation, finger "left to right") then pressing resonably hard (the hard screen should protect the device - if not you're pressing too hard!) slide your finger down the screen from top to bottom trying to keep an even pressure. This should hopefully even out the surface.
Failing this, as Dude10 suggests, take the battery out and use your thumbs (holding with fingers in the battery well) to press and "smear" around the problem area.
Unfortunately, other than this I don't think there's a particular way to remove the effect totally if it doesn't work...
Obviously it's speculation given that you didn't mention how it happened in the first place, but it does sound like it got knocked or pressed by something either in bag or pocket - maybe even a fold in the pouch
Hope you manage to smooth it out!
WhO_KnOwS said:
After owning the Touch HD for a full month I just noticed that down the middle of the screen there is something which I can best describe as an oil stain.
Click to expand...
Click to collapse
Just a long shot, but:
Sometimes a similar effect can be caused when some moisture has got between the layers of a display.
Have you used the phone anywhere damp or very humid ?
Keeping it somewhere warm and dry might be worth a try?
- Steve
Thanks for all the tips. The issue happened when I had the Touch HD in the pouch and in my pocket - so the idea that it was a fold in the pouch holds water.
The funny thing however is that before I saw all of your replies I was already out the door (with the Touch HD back in the pouch and pocket). 5 minutes later when I pulled it out the issue was gone. I am guessing that I reapplied the exact amount of pressure needed or something like that.
Thanks again for the tips and especially to chaosdefinesorder for the nice explanation.
Thx for helping explanation
5 minutes later when I pulled it out the issue was gone.
Click to expand...
Click to collapse
no, i don't think it was gone. check again under a fluorescent light....
i have this on my diamond. my HD is flawless (till now...)
i phoned to a technician and explain the phenomena and he invited me to replace the screen. when i got there, to my complete amazement and embarrassment the stain was gone. only later i discovered that the stain is visible under fluorescent light only.
chaosdefinesorder said:
Unfortunately, other than this I don't think there's a particular way to remove the effect totally if it doesn't work...
Hope you manage to smooth it out!
Click to expand...
Click to collapse
thanks m8, already tried this (on my diamond) and tried now again with both yr methods. no results. the stain is still there...i think only a replacement can solve it.
here u have the paralel thread in diamond forum:
http://forum.xda-developers.com/showthread.php?t=439410&highlight=oily+stain
you can not do it yourself. the best way will be to go to your seller or straight to HTC, because I think you HD still have warranty.
I repaired ones an Diamond and I can tell you, it wasn´t an easy way.
Hey, I noticed something weird the other day when using a car Handfree harness, the magic barely reacted to touches of my index finger, even if i press hard, it only reacted to the thumb, but if i hold the device is my hand, it reacted to the pointer finger just fine
same when placing the magic on the table
any idea of why that is? it makes it pretty irritating to dial from the car.
Did anyone else notice this?
Does it have the problem on any table (metal/wood/...)?
And if hold (by you) just lightly touching the table, but with no pressure on it ?
rootbit said:
Hey, I noticed something weird the other day when using a car Handfree harness, the magic barely reacted to touches of my index finger, even if i press hard, it only reacted to the thumb, but if i hold the device is my hand, it reacted to the pointer finger just fine
same when placing the magic on the table
any idea of why that is? it makes it pretty irritating to dial from the car.
Click to expand...
Click to collapse
Thats weird but I actually noticed this on my Magic TIM (32a) even with daldroid rom!
I thought I just had a bad dream im kinda relieved im not alone.
I also have a 32a board.
I installed Cyanogen.
Still the same issue.
The touch screens on these devices are not pressure sensitive. They measure capacative discharge, or the passing of current from the finger to the screen (or vice versa). If you are not contacting the device and basicaly "grounding" yourself to it, it may not register the contact. Sorry if my tech terms are bad.
The main need for the lock screen is in the following situation:
Phone is in your pocket (or bag), a hard key is accidentally pressed, the device wakes up. This by itself is not a problem, since without anything else happening the device will go back to sleep, but, if another hard key is pressed while the device is active (screen press can not happen while in pocket, since it's capacitive), the device can start do annoying things.
Now, if the proximity sensor can be designed to switch on when device wakes up, and put it back to sleep (immediately) if device is in pocket/bag, this will kill the need for a lock screen. This is totally possible and just awaits the programmer who wants to make our lives easier...
hm. try pocketShield?
it locks and unlocks your device by use of the light sensor.
Interesting. I will use it for now.
The problem with using a light sensor is that if you use the phone in the dark it won't unlock. Proximity sensor won't have this problem hence it's a better sensor for the task.
Apparently this will happen even without the help of the XDA community...
I've just sent the following email to PocketShield:
Hi,
I would like to know if you are working to utilize the HD2's proximity sensor for unlock (like you did for Omnia). If so, when should we expect a version with this feature ?
Thank you very much.
Click to expand...
Click to collapse
This is their answer:
That’s the idea, but can’t confirm that yet because we are not sure if hooking into the proximity sensor will be possible. Hope yes, as in Omnia2. Just received our new HD2 today and will start to dive into it next week.
Best Regards,
Jim
Click to expand...
Click to collapse
so has anyone tested this for the hd2?
http://www.pocketshield.net/
http://www.youtube.com/watch?v=SpxY9t34TTI
Noam23 said:
The problem with using a light sensor is that if you use the phone in the dark it won't unlock. Proximity sensor won't have this problem hence it's a better sensor for the task.
Click to expand...
Click to collapse
Use TouchLockPro. It has both light and proximity sensor and it is free.
kweiss10 said:
....
http://www.youtube.com/watch?v=SpxY9t34TTI
Click to expand...
Click to collapse
Looks like the guy from the answering machine has found a new job
won't this increase battery drain dramaticly? i think it will becouse it will be constantly looking for light and using that proximity sensor..
Noam23 said:
The main need for the lock screen is in the following situation:
Phone is in your pocket (or bag), a hard key is accidentally pressed, the device wakes up. This by itself is not a problem, since without anything else happening the device will go back to sleep, but, if another hard key is pressed while the device is active (screen press can not happen while in pocket, since it's capacitive), the device can start do annoying things.
Now, if the proximity sensor can be designed to switch on when device wakes up, and put it back to sleep (immediately) if device is in pocket/bag, this will kill the need for a lock screen. This is totally possible and just awaits the programmer who wants to make our lives easier...
Click to expand...
Click to collapse
You are wrong about one important detail though. The screen is very sensitive and can easily be pressed through the lining of your pocket, and even through fairly thick fabric like jeans.
it's a capacative screen...
capacative scree = no stylus/fingernail/penny/spoon
it wont be acvitating throught screen contact.
impossible. (unless you have rrrrrealy thin pants, and the current can pass throught them)
saintnickxiii said:
it's a capacative screen...
capacative scree = no stylus/fingernail/penny/spoon
it wont be acvitating throught screen contact.
impossible. (unless you have rrrrrealy thin pants, and the current can pass throught them)
Click to expand...
Click to collapse
hi, the pants didnt have to be that thin. i think the hd2 screens also vary a lot, in being more or less sensitive. another thing is that people are deifferent when it cames to electric fields. also sweating can affect the display. i startet programs and other touchscreen things already, when the device was in my pocket.
regards mad
jamieeeee said:
won't this increase battery drain dramaticly? i think it will becouse it will be constantly looking for light and using that proximity sensor..
Click to expand...
Click to collapse
In the case of Pocketshield, it won't. Because all sensors only turn on during a short period of time (seconds). Once you unlock or turn off, sensors go to sleep. This is one of the reasons why "auto lock" is not possible, because that will indeed involve a permanent monitoring on the sensors.
saintnickxiii said:
it's a capacative screen...
capacative scree = no stylus/fingernail/penny/spoon
it wont be acvitating throught screen contact.
impossible. (unless you have rrrrrealy thin pants, and the current can pass throught them)
Click to expand...
Click to collapse
You don't know what you're talking about. I didn't say it was sensitive to pressure, but rather that direct contact between skin and the screen is not necessary. Holding my finger on one side of the fabric, and the other side of the fabric touching the screen, this is registered by the screen as a touch EVERY TIME. There are maybe materials that completely isolates the screen, for other materials it probably depends on how thick they are. For me it is certainly possible to influence the screen even through pretty thick cotton fabric (maybe other types of fabric too, I wear mostly cotton), leather, and even paper. Just to test it, I just did a slide to unlock my HD2 through a pile of papers (granted it wasn't a very thick pile, only six sheets of paper thick), and through my leather shoes (this was a little trickier, I had to to make sure that my foot made good contact with the leather at the point where I was sliding my phone across the shoe). i can interact with the screen through normal denim jeans fabric without any problem, and the pocket lining of trousers are usually quite thin, so accidental interaction with the screen seems almost unavoidable if the screen is unlocked in the pocket.
I have actually had some problems a couple of times when the slide to unlock had been deactivated on my HD2. I once took my phone out of my pocket and it was at the confirmation screen for factory reset, and I have actually had the phone hard reset on me once which I suspect may have been caused by the slide to unlock being deactivated. I would never knowingly put an unlocked phone in my pocket, and I wouldn't recommend it to anyone, but you're welcome to do as you please.
X1-owner said:
You don't know what you're talking about. I didn't say it was sensitive to pressure, but rather that direct contact between skin and the screen is not necessary. Holding my finger on one side of the fabric, and the other side of the fabric touching the screen, this is registered by the screen as a touch EVERY TIME. There are maybe materials that completely isolates the screen, for other materials it probably depends on how thick they are. For me it is certainly possible to influence the screen even through pretty thick cotton fabric (maybe other types of fabric too, I wear mostly cotton), leather, and even paper. Just to test it, I just did a slide to unlock my HD2 through a pile of papers (granted it wasn't a very thick pile, only six sheets of paper thick), and through my leather shoes (this was a little trickier, I had to to make sure that my foot made good contact with the leather at the point where I was sliding my phone across the shoe). i can interact with the screen through normal denim jeans fabric without any problem, and the pocket lining of trousers are usually quite thin, so accidental interaction with the screen seems almost unavoidable if the screen is unlocked in the pocket.
I have actually had some problems a couple of times when the slide to unlock had been deactivated on my HD2. I once took my phone out of my pocket and it was at the confirmation screen for factory reset, and I have actually had the phone hard reset on me once which I suspect may have been caused by the slide to unlock being deactivated. I would never knowingly put an unlocked phone in my pocket, and I wouldn't recommend it to anyone, but you're welcome to do as you please.
Click to expand...
Click to collapse
oh, i didn't know it was that sensitive, then, i can really see a need for an apps like this.
but, what about just a normal case? slip it in and out? i mean, i think that COULD solve your problem in a 'no thrills' sorta way... but it wouldnt be as exciting now would it?
madbird said:
hi, the pants didnt have to be that thin. i think the hd2 screens also vary a lot, in being more or less sensitive. another thing is that people are deifferent when it cames to electric fields. also sweating can affect the display. i startet programs and other touchscreen things already, when the device was in my pocket.
regards mad
Click to expand...
Click to collapse
this of course is also true.
taking this into account, i would suggest everybody ground themselves. lol, no... just kidding. i don't even think that would help.
Hi all! Im in love with this community from day 1
its my 1st thread though seeking for help/advice/your superior knowledge
Thing is that i want to mount my phone in my car using a small magnet attached somewhere at the dashboard and stick my HD2s back cover which is metallic...
my question is: is it possible because of the nature of the magnet to cause problems in the phones operation?? like radio interference or something like this?
looking forward to your answers
i think a magnet may interfere with the touch screen. not positive on this but am sure i`v read somewhere about tiny magnets being in the tip of some capacitive screen stylus`s. a stronger magnet to hold a hd2 would surely result in some type of touch screen interference. but like i said am not a 100% certain.
**** turpin said:
i think a magnet may interfere with the touch screen. not positive on this but am sure i`v read somewhere about tiny magnets being in the tip of some capacitive screen stylus`s. a stronger magnet to hold a hd2 would surely result in some type of touch screen interference. but like i said am not a 100% certain.
Click to expand...
Click to collapse
magnetism will not affect a capacitive touch screen. It will however mess about with the compass!
A capacitive Touchscreen works like a capacitor, whichs field is "spread" over the surface of the screen. By tapping you will change the the resistance of the oscilating resonant circuit, which has a specific resistance (which is related to the dielectric medium, which is changed by your finger)
With this, the phone is able to locate your finger in X + Y axis to find out where you have tapped.
ardsar said:
magnetism will not affect a capacitive touch screen. It will however mess about with the compass!
Click to expand...
Click to collapse
Yes, obviously it will but thats the least of my worries as it wont be permanently attached to the magnet and the times it will, i wont be needing the compass app.
so if thats the only problem i think im gonna give a try to this project...
A capacitive Touchscreen works like a capacitor, whichs field is "spread" over the surface of the screen. By tapping you will change the the resistance of the oscilating resonant circuit, which has a specific resistance (which is related to the dielectric medium, which is changed by your finger)
With this, the phone is able to locate your finger in X + Y axis to find out where you have tapped.
Click to expand...
Click to collapse
Does this mean that a magnet at the back could interfere with the circuit of the screen? and if yes i guess is temporary right?
waiting for more thoughts/input on the subject
Maeffjus said:
A capacitive Touchscreen works like a capacitor, whichs field is "spread" over the surface of the screen. By tapping you will change the the resistance of the oscilating resonant circuit, which has a specific resistance (which is related to the dielectric medium, which is changed by your finger)
With this, the phone is able to locate your finger in X + Y axis to find out where you have tapped.
Click to expand...
Click to collapse
WOW!!!! your talents are wasted on here my friend!! lol
**** turpin said:
WOW!!!! your talents are wasted on here my friend!! lol
Click to expand...
Click to collapse
this is school knowledge...
after some trial and error i found out that the back cover of HD2 although it looks metallic apparently its not coz it can't be attached to a magnet...
That would only mean that it is not made of an iron compound
Benz-Driver said:
this is school knowledge...
Click to expand...
Click to collapse
not in my school my friend lol must say it wasnt the nicest, the teachers had a torrid time! lol i DO know how to use a bunsun burner, is that any help? lmao. Happy Christmas bud.
magnet
I think it is made from stailess steel.magnets do not work on S/S.
ardsar said:
magnetism will not affect a capacitive touch screen. It will however mess about with the compass!
Click to expand...
Click to collapse
Is that true? I know old compasses relied on a magnetised needle to work, but I thought the compass in the HD2 got it's direction from the GPS and the accelerator software??? How would a magnet affect these?
Armes said:
Is that true? I know old compasses relied on a magnetised needle to work, but I thought the compass in the HD2 got it's direction from the GPS and the accelerator software??? How would a magnet affect these?
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no it's a dedicated compass hardware
Actually, even my notebook apparently hurts it! Looses calibration
yes several times when i opened the compass application arround various interferences it asked me to move it in the usual 8-like movement to calibrate itself..
what about the rest of the phone and memory and SD card wouldnt it affect the storage ? i clecned out my speakerphone with a very small magnet yesterday to get all the lil pieces stuck on it.
and after that my phone(touch pro2) completely froze up and kept freezing up after first input untill i did a hard reset.
**** turpin said:
i think a magnet may interfere with the touch screen. not positive on this but am sure i`v read somewhere about tiny magnets being in the tip of some capacitive screen stylus`s. a stronger magnet to hold a hd2 would surely result in some type of touch screen interference. but like i said am not a 100% certain.
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i did another little test with a small round magnet around 2cm diameter. i moved it around the back of the phone while looking at the screen and i didnt notice any interference to the screen, at least to my eyes it looked like the magnet did not interfere with the phone at all.
However i moved the magnet to the screen and tried to touch the screen gently with the edge of the magnet and the screen responded immediately and it looked very precise too! i did several presses to the screen with the magnet and in all of them the screen responded exactly as it should, just like it should with the press of a finger, i even wrote some letters as text and it worked great. so i guess thats how they make capacitive stylus..
next time im gonna try to draw on notes application and see how precise it is on that.. (as long as i find a smaller magnet that i can handle better than this one)
i might try to make my own capacitive stylus....
why not....
I have attatched a magnet to the back of my HD2 so i can use my vent mount, i havent noticed any adverse effects.
I'm wondering if anyone else has seen this. It is clearly a hardware issue, and I doubt there's much I can do since it's not under warranty AND has a hacked bootloader, but:
If it gets jostled too much, especially if a particular spot near the dock connector gets much pressure, the screen "glitches" and it becomes unresponsive. It even happened yesterday when it was on my lap at a 90 degree angle and fell over onto my stomach. It's very difficult to use it for more than a short 5-10 minute period without this happening unless I'm SUPER gentle with it.
The screen comes back visually and can continue to be "glitched" with that slight pressure to the right spots, but it never comes back to responsiveness. I have to hard reset.
I can create a video of this behavior if anyone thinks that'll help.
The whole thing is unresponsive - even with a mouse or keyboard attached, no response, so it's not like just the touch sensitivity is gone. I doubt anyone does, but if there are any ideas / good places that will repair it for a realistic fee, I'd love to hear it. Thanks!
dirtygreek said:
I'm wondering if anyone else has seen this. It is clearly a hardware issue, and I doubt there's much I can do since it's not under warranty AND has a hacked bootloader, but:
If it gets jostled too much, especially if a particular spot near the dock connector gets much pressure, the screen "glitches" and it becomes unresponsive. It even happened yesterday when it was on my lap at a 90 degree angle and fell over onto my stomach. It's very difficult to use it for more than a short 5-10 minute period without this happening unless I'm SUPER gentle with it.
The screen comes back visually and can continue to be "glitched" with that slight pressure to the right spots, but it never comes back to responsiveness. I have to hard reset.
I can create a video of this behavior if anyone thinks that'll help.
The whole thing is unresponsive - even with a mouse or keyboard attached, no response, so it's not like just the touch sensitivity is gone. I doubt anyone does, but if there are any ideas / good places that will repair it for a realistic fee, I'd love to hear it. Thanks!
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Why not just pop off the back cover and take a look around for loose connectors? Won't hurt anything.
MD
i have no such problem here matey and i ride a bike with the a500 in a laptop bag all day.