Database Users

Oil-like stain reflection on screen

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.

Moire pattern on screen

Whoops! Anyone else experiencing this?
It's worst in person, but I think the video kinda shows how it creates a moire pattern with just light tap on the glass. I noticed it when I tried to clean/wipe the screen and seen the pattern on the right side. It only happens on the right side though.
I'm a bit dissappointed as this is my second one, and the first one don't have this even if I put pressure on the glass. I know this one happens, but only with lots of pressure on the screen, but definitely not with just a slight tap.
I'm using my wacom stylus on this one, but it's the same effect with just my fingers, just to be clear.

Yes I noticed this on my XOOM as well, when I was installing my first screen protector. It's only visible when the unit is turned off, and only on certain parts of the screen. I had long since forgotten about it, as it doesn't affect my device at all when its turned on.
Edit: Just looked at your video - looks like you are having a problem while the unit is turned on - I don't see that much distortion with casual pressure while the unit is turned on with my XOOM.

Digital Man said:
Yes I noticed this on my XOOM as well, when I was installing my first screen protector. It's only visible when the unit is turned off, and only on certain parts of the screen. I had long since forgotten about it, as it doesn't affect my device at all when its turned on.
Click to expand...
Click to collapse
I wouldn't have mind if it's only visible when it's off, but this one is visible even when it's on (as shown on the video).

What you have is a little odd. Doesn't look right. I had a laptop that exhibited a similar pattern after it took a hit to the screen. If I would flex the screen or wipe it I would see a pattern like that. Never got any worse, but never got any better either.

Its probably a small capacitor behind the screen, if you apply too much pressure you can probably break the LCD in that spot, probably a design flaw from the screen manufacturer. You can try and return it but probably the next one will be the same.
Also Moire effect is a whole different than what you have on the video.
This is moire effect.
http://www.youtube.com/watch?v=Max5-hXkhwU

i had this, I returned my rooted xoom for one that didn't do that.

Yeah, if possible return it. Something is putting pressure on the screen right there and it could lead to it breaking at that spot in a situation that would not break a normal xoom. It's a manufacturing defect. The worst part is that nothing will likely be done about it and someone else will get the same unit with the defect still in it as a refurb since it's not a flaming obvious defect that keeps you from using the device.

I've had 3 different Xooms, and they all exhibited this effect to one degree or another. They were a 3G/4G unit I returned to get a wifi-only unit, and one I returned due to this problem. The one I have now also has it.
I first noticed it on the second wifi-only when I was cleaning the screen with the unit turned off, and then noticed it when I turned the unit on and pressed a little harder than usual. I checked the 3G unit, and it was the same. Others mentioned theirs having the issue on the Motorola forums, so it seems pretty consistent.
It seems to me that this is a design issue around screen support on the right side. It appears that there's a portion of the screen where the LCD can be bent that's different from the rest of the screen.

HTC Raider/Vivid/Velocity Digitizer

Hi guys - got a question re: potentially restoring full function to a glitchy digitizer panel I bought as a replacement for my original (broken) one. I know this isn't a Q&A forum but anyone in here is likely going to have more knowledge of the digitizer from a hardware aspect than anyone in the general Q&A forums..I hope.
I had no trouble installing the panel, physically - the design was identical to the original and I took care when shaping the ribbon cable so as not to damage it. My problem is this: My digitizer seems to "skip" one contact point on both the x and y axis so that there is a dead area on my panel which makes text input quite a hassle. I can get it to read input from the area if I touch VERY gently and very accurately, but other than that it takes input from the sensors around the actual point I'm touching, like its getting more capacitive feedback from those areas than from where I'm actually touching.
I hope thats not too confusing. Basically there's a nonresponsive vertical line down the right side of my screen 1" from the edge, and another one 1" up from the bottom going horizontally. At the point where these lines intersect I have a hell of a time getting it to recognize where I'm touching accurately. I've tried the HTC screen calibration tool to no avail.
I'm wondering if anyone has any tricks I can try to get this sucker working properly.. Its slowly driving me crazy. I saw one guy on youtube take a much larger digitizer from another device and take a lighter to the glass side for a few seconds, then apply pressure to the heated areas on both sides of the glass, sandwiching it together and (I assume) reattaching or more firmly attaching the plastic film to the inside of the glass. I don't want to try this without first asking if its wise here, and see what more experienced people have to say on the subject. I may be way off here and there's a simple fix, I just haven't been able to find one.
Help!? LOL..*someone* in here must have some experience with this, no??
Thanks in advance for any replies. Helpful or otherwise.

[Q] A500 Shorts Out (I think)

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!
Click to expand...
Click to collapse
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.

Defective drawing board

Hello
I have just noticed that the a little area in the upper left corner around the ESC and 1 key, has very poor sensitivity. I almost can't draw there, it's like the sensitivity drops in that small area. Has anyone else experienced this?

ClausG76 said:
Hello
I have just noticed that the a little area in the upper left corner around the ESC and 1 key, has very poor sensitivity. I almost can't draw there, it's like the sensitivity drops in that small area. Has anyone else experienced this?
Click to expand...
Click to collapse
Hi,
I have never noticed it before; but when I specifically searched for it, it is indeed there as you described. Sensitivity drops and cursor jiggles a bit.
I don't think this is much of an issue thou. Every drawing tablet I had had some kind of issues around edges. And, honestly, when you ever need to draw around edges? You simply move the canvas

Thanks
I suspected that this was a design flaw rather than a defect

I have the same problem and also there is a complete line with some important jitter when you draw slowly on it. I reproduced it on two different Windows Yoga Book, I did not have the opportunity to test it on Android.

Just went to the store where it's bought. I tested 2 Android versions, that was on display. And they acted in exactly the same way. So I think it's the way it's designed

Here is a picture of what happened if you draw lines with a rule. We can see a lot of jitter... Like if there is a line area that completely interfere with the pen. I also tried to follow the keyboard keys frames with the pen : it is obviously problematic in the corner we talked about.
Code:
https://drive.google.com/open?id=0B1Qu-HXdIAp0U0tvVWpRT016Tm8

This is a frigging design and hardware flaw. I had this issue with my previous YB as well. What were they thinking? It kills me. I want my money back. There are other areas with iesuse. pretty much upper %15 is full of issues, your lines might get wiggly!
It sounds like noone from Wacom or Lenovo tested these devices for real.