FusionFanatic

you can buy 7" touchpanel / controller kits on ebay for about $40 (+s/h). these have become very popular with ASUS EeePC users so they're easy to find, and much cheaper now.

good luck

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sniiki

Continuing my monologue..

Here's another video clip (4megs) that shows that when the problem occurs and I press the frame quite hard near the point where the pointer jumps, it helps.

Maybe I could just shovel tons of crap between the frame and panel to get that pressure there constantly but I don't think that does any good for it in the long run neither it is an actual solution.

Damn this is getting quite annoying..

Anyone got a cheap 8" touch panel + controller for sale?

sniiki

Except that my screen is 8"

I'm realizing new stuff every minute..

Lead-in:
If you touch a touch panel from two different points at the same time, it guives a reading from the middle of those points.

So...
If the problem would be in the panel element and it would think there's something touching at the right edge and I then press the panel lets say from the opposite edge shouldn't it place the pointer in the middle of the screen? (yes it should)

BUT.. In my case when the pointer stucks to the edge, and I touch the panel anywhere, pointer jumps right where I touch. Then if I release my touch, pointer jumps back to the edge.

So what the hell does this mean or does it mean anything?
Controller unit is *****ed up?

The problem first occurred when I tried to do the 25point calibration for the first time. Prolly just coincidence tho..

But please share ANY ideas you have, coz I'm running out of my own.

Boy it would feel great if I'd just smash that thing with a hammer..


EDIT EDIT: Nevermind..

Bugbyte

Could it be a driver issue?

BTW, does the touch panel actually work when you touch it? I mean, pretty much where you put your finger is where the pointer goes, right? At least that's how it looks from the video. So the question is, can you control the computer by touch even though it jumps to that right hand side?

If it isn't a driver issue, it seems like a touch panel quality issue. It seems to fix itself if you press hard on the right, as if the layers are delaminated or not working properly.

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sniiki

Have tried several drivers, didn't seem to help.

Yes, the panel works but when the pointer decides to jump to the edge, it also toggles the left mouse button, so when I then touch some other part of the screen I get that dash-line square thingie on windows desktop. Then I usually get mad and whack the poor panel a bit untill it stops scewing around meaning the pointer doesnt automatically jump to the edge anymore.

(Lcd panel it self starts to give some sings that I've been too rough for it as there was a connection problem and it gave one vertical blue line for me Not permanent tho fortunately )

Now I tried one more thing, changed drivers again and put some more insulant between the metallic lcd frame and touch panel. I should not say this but.. seems to work again fine.

btw. 8" panel + controller is ~57$ incl. shipping from Hong Kong (ebay)

sniiki

Received this private message:


Unfortunately I have to say again that the the problem wasn't solved
But it does it a lot less now.

I think the final reason is indeed that the touch panel is poor quality and that the problem has something to do with the conductive film of the panel. It's either broken or then somehow touching other layers of the panel structure, I don't know.

Reason for the previously discribed behaviour (pointer jumps right where I touch, not between the problem point and touch point) is, I believe, that the false reading is so weak compared to the touch of finger. That's why it also does that odd twitching when touching the panel very gently.

Solution for this problem?
Well.. you could try to find a place that fixes the problem when pressed and then try to apply a constant pressure there by stuffing matter between the case frame and touch panel or between tha lcd and touch panel.

New panels from China really are cheap but I don't know if it's worth of ordering as they're prolly the same crap as this one.

rsema: btw where did you purchase your screen? Have you contacted the company who ever sold it and if, have they responsed anything?


PS: the brand of the LCD is NiceView or atleast it's sold with that name in some sites...

PS PS: Is there any electronics guru around here who would know how to reduce the sensitivity of the panel? So maybe that way I'd get rid of the "ghost touch". Adding some more resistance won't help anything as it measures the change, not absolute value right?

rsema

hey thanks for the response...as I have already opened the case before...i dont think i could get a replacement...i got mine from greatdeals18.com...today i noticed that when i touched the screen it just jumps all over the place and occassionally right clicks and twitches in the top right hand corner while not even touching it...sometimes i cant even see the pointer untill i touch the screen...im going to take it apart today and see if it does it while out of the bezel...good luck and i will keep yall posted on what happens...

rsema

hey i took the screen completely apart and just got the actual touchscreen panel assembly off of the lcd and plugged it in to a different computer screen and the same happened...just jumps all over the damn place and right clicks and clicks and all kinds of ****...took a look at the circuit board and i couldnt see anything burnt or shorted out so
WTF!!! O welll ill have to look into getting a replacement panel or controller...now i need to find out which one is bad...im thinking its the actual panel not sending signals right but who knows...
good luck and i hope someone finds a solution...

sniiki

I gave up and ordered new panel + controller from Hong Kong.
(http://stores.ebay.com/SCB-PICs. 57$ including shipping, and replied to my mail in a minute and it wasn't autoreply as you have to mail them which size you want, hope it'll ship as fast )

I could live with this one as it usually works fine but when it starts screwing around, I have to press the panel so hard that I'm afraid that the LCD will get damaged if I continue that as I already got that one blue vertical line there on time.

I'll update this thread if anything special occurs.

Good luck rsema, and thanks everyone for the help!

rsema

hey man do you mind if i have your old one...as we might have different parts messed up and i could interchange...thanks

sniiki

I think I have use for it in some diy projects and anyways, I think you problem is also the touch element it self

But why shouldn't you order another new from ebay too? It doesn't cost much more than shipping this damaged one from finland

ShawJohn

Sounds to me like the same problem the 7" lilliputs get. The touchscreen overlay becomes delaminated as the glue holding it all together melts when the screen gets too hot. Its starts off erratic, then eventually the whole right hand side of the touchscreen will stop working. This problem was acknowledged by Mo @ Lilliput UK Tech support.

Well known fault on Lilli's. Only known fix is replacement overlay, costs about £40 IIRC from Armen @ digitalww.com



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sniiki

I really wonder why these small panels run so damn hot. I mean this get REALLY hot and all desktop monitors stay really cool, barely warms at all.

Maybe I should install thin fan on the back side..

rsema

yeah i will second you on the fan...ill take pictures and post them and let you know how it works...be about a week though since i am going to have to wait for the parts...
snikki: has the place shipped your panel yet?
thanks for the help

sniiki

Think not as they sent some confirmation email yesterday but hopefully it will ship on monday.

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