Database Info

does sapphire have "real" multi-touch hardware?

in this thread:
http://groups.google.com/group/andr...97?lnk=gst&q=2.0+multi+touch#e961299866067097
someon says:
From what I've heard, the G1 phone doesn't not handle real multi
touch.
When there are several touches, it just indicates all the X and Y
coordinates, but you still don't know to which impact it is connected.
For instance, you can know that there are some impacts with this
coordinates:
X = 5, 10
Y = 5, 10
But from there, you can't decide whether the impacts are at ( 5, 10 )
and ( 10, 5 ) or (5, 5) and (10, 10 ).
You can still use for those limited things ( multi touch zooming ),
but definitively not for everything !
Still from what I've heard, it is a hardware limitation, so it won't
change !!!
Click to expand...
Click to collapse
that means , If both touches occur simultaneously, a program cannot recognized these two points.
as Dianne Hackborn mentioned multi-touch response latter in the thread, G1/sapphire has diffrent behavior from moto Droid. it seems sapphire has same screen hardware as G1. so does it means, G1/sapphire both not have real multi-touch harware? and what about hero device?

Touch Screen
No the touch screen is multi-touch however to enable it we need some software modding They probably did not enable it due to the fact of more money on htc hero and such. Most touch screens nowadays are multi-touch but have not been enable for reasons or software. However the quote "but definitively not for everything !" is correct in the way of not everything but that depends on the coding and software not the hardware.

You heard wrong. You can get multi-touch on both G1 and Sapphire. I've got Loccy's BetterBrowser from CyanogenMod, and I can zoom in and out with pinching.

sanpei said:
in this thread:
http://groups.google.com/group/andr...97?lnk=gst&q=2.0+multi+touch#e961299866067097
someon says:
that means , If both touches occur simultaneously, a program cannot recognized these two points.
as Dianne Hackborn mentioned multi-touch response latter in the thread, G1/sapphire has diffrent behavior from moto Droid. it seems sapphire has same screen hardware as G1. so does it means, G1/sapphire both not have real multi-touch harware? and what about hero device?
Click to expand...
Click to collapse
it has a capacitive touch screen, which gives it the ability to have multi-touch through the use of software updates. If it had a resistive touch screen, like the Droid Eris does, then it would not be able to support multi-touch

Resistive Touch Screen
tazz9690 said:
it has a capacitive touch screen, which gives it the ability to have multi-touch through the use of software updates. If it had a resistive touch screen, like the Droid Eris does, then it would not be able to support multi-touch
Click to expand...
Click to collapse
Not entirely true here is a resistive touch screen with multi-touch http://www.engadgetmobile.com/2009/02/19/stantums-mind-blowing-multitouch-interface-on-video/

tazz9690 said:
it has a capacitive touch screen, which gives it the ability to have multi-touch through the use of software updates. If it had a resistive touch screen, like the Droid Eris does, then it would not be able to support multi-touch
Click to expand...
Click to collapse
my friend you are wrong the droid eris DOES have a capacitive screen
http://phandroid.com/2009/11/05/htc-droid-eris-specs-found/

SpaceBoy2000 said:
You heard wrong. You can get multi-touch on both G1 and Sapphire. I've got Loccy's BetterBrowser from CyanogenMod, and I can zoom in and out with pinching.
Click to expand...
Click to collapse
please read my quote carefully, then you know that there has a possible situation:
when two or more touches occured, the screen hardware give out two X-values and two Y-values, but not two pairs of (X, Y).
in this situation, we cannot dermined if X1 are paired with Y1 or paired with Y2, the same X2: paired with Y1 or paired with Y2?
just think about how a capacitive screen works, if the manufactur designed the hardware works as this situation, then we cannot make a multi-touch action with two or more fingers SIMULTANEOUSLY.
so we still has some multi-touch functions, but not all of them.
Dianne Hackborn is a google guy, so i think the difference between our phone and moto Droid must be exists. but I don't know if sapphire or hero falls into the situation above.

hope everyone's views helped (wrote this because I could not delete post)

jamezelle said:
my friend you are wrong the droid eris DOES have a capacitive screen
http://phandroid.com/2009/11/05/htc-droid-eris-specs-found/
Click to expand...
Click to collapse
yeah i am getting confused with the tatto. That one has a resistive touch screen. I just checked up on it.
@xillius200 Though it can have multi touch using stantun's technology, it is too expensive to make it a cost effective phone that people will want to buy and it also makes everything a lot bulkier.

double post

sanpei said:
please read my quote carefully, then you know that there has a possible situation:
when two or more touches occured, the screen hardware give out two X-values and two Y-values, but not two pairs of (X, Y).
in this situation, we cannot dermined if X1 are paired with Y1 or Y2, and X2 are paired with Y1 or Y2.
just think about how a capacitive screen works, if the manufactur designed the hardware works as this situation, then we cannot make a multi-touch action with two or more fingers SIMULTANEOUSLY.
so we still has some multi-touch functions, but not all of them.
Dianne Hackborn is a google guy, so i think the difference between our phone and moto Droid must be exists. but I don't know if sapphire or hero falls into the situation above.
Click to expand...
Click to collapse
Ouch, egg on my face and all that. My bad.
...nothing to see here. Carry on.
(note to self - read)

SpaceBoy2000 said:
You heard wrong. You can get multi-touch on both G1 and Sapphire. I've got Loccy's BetterBrowser from CyanogenMod, and I can zoom in and out with pinching.
Click to expand...
Click to collapse
I have an HTC Magic running a Hero ROM and I have multi-touch, but rarely use it. It seems the more features I have the less I use them... including Bluetooth.

tazz9690 said:
@xillius200 Though it can have multi touch using stantun's technology, it is too expensive to make it a cost effective phone that people will want to buy and it also makes everything a lot bulkier.
Click to expand...
Click to collapse
HAHAHA.... tell that to Apple
Although i agree stantun's current solution is bulky, it could easily be adapted to a mobile platform, with enough interest.

SpaceBoy2000 said:
Ouch, egg on my face and all that. My bad.
...nothing to see here. Carry on.
(note to self - read)
Click to expand...
Click to collapse
when i saw this info, i feel like yours.
but if it is ture, we still have some function like zoom, etc.
functions like zoom only care about abs(x1 - x2) + abs(y1 - y2)
and:
if a app supports that user put a finger on, then put another, and the app recognize it as both finger touch the screen at same time, we can use it normally.
considered that promise of act simulataneously EVERY TIME is not so easy for human being, maybe developer will think about it.
so i think even if the hardware design of G1/saphire are really so different from a iphone-like screen, we should not miss something really important.
but i still want to know, if the message is true.

[SOLVED][Q] Any suggestions for wavy lines when drawing?

I have the Galaxy Tab 2 7.0, rooted with 4.0.4, and have not had any problems with it for the most part.
I recently downloaded Sketchbook Express to see how well the tablet could handle drawing. It handles it very well with one exception: the closer you get to drawing at a 45* angle, the more wavy the lines get. If I quickly swipe in that direction, it straightens out, but the slower I go, the more pronounced the waves or zig zags get. This happens using any of my fingers, the $20 Rocketfish stylus, and the $30 Wacom Bamboo stylus. All attempted on a freshly cleaned screen. I've also tried different apps with the same result. This guy had the same issue, as have others from what research I could pull up, but outside of unhelpful answers of "it's your stylus" (it's not), they all seem to have given up on getting help.
I've tried these apps on my friend's Evo 4G 3D, running Android 4.0.3, and had the same issue. I then tried on my rooted Xperia Play running Android 2.3.3 Gingerbread, and did not have this issue. I'm not entirely convinced it's an OS version that's making the difference, but I'm not able to find much information about the screens these devices use outside of "capacitive touch". I did learn that these screens use the corners to determine the location of input being received, so maybe moving directly in the direction of a corner is causing it to mess up?
Long story short, my questions are thus: is there any way to fix, calibrate, or compensate for this issue? Is it the screen, a hardware issue, or something else? Is there anything I can do?
Thanks for your time.

pWEN said:
I have the Galaxy Tab 2 7.0, rooted with 4.0.4, and have not had any problems with it for the most part.
I recently downloaded Sketchbook Express to see how well the tablet could handle drawing. It handles it very well with one exception: the closer you get to drawing at a 45* angle, the more wavy the lines get. If I quickly swipe in that direction, it straightens out, but the slower I go, the more pronounced the waves or zig zags get. This happens using any of my fingers, the $20 Rocketfish stylus, and the $30 Wacom Bamboo stylus. All attempted on a freshly cleaned screen. I've also tried different apps with the same result. This guy had the same issue, as have others from what research I could pull up, but outside of unhelpful answers of "it's your stylus" (it's not), they all seem to have given up on getting help.
I've tried these apps on my friend's Evo 4G 3D, running Android 4.0.3, and had the same issue. I then tried on my rooted Xperia Play running Android 2.3.3 Gingerbread, and did not have this issue. I'm not entirely convinced it's an OS version that's making the difference, but I'm not able to find much information about the screens these devices use outside of "capacitive touch". I did learn that these screens use the corners to determine the location of input being received, so maybe moving directly in the direction of a corner is causing it to mess up?
Long story short, my questions are thus: is there any way to fix, calibrate, or compensate for this issue? Is it the screen, a hardware issue, or something else? Is there anything I can do?
Thanks for your time.
Click to expand...
Click to collapse
The problem is the digitizer. It's cheap. I think all of the g tabs have this issue. Mine is terrible drawing diagonal lines and even scrolling in landscape mode is choppy. Only way around it from what I can tell is to apply more finger surface area. That seems to fix it. But since you're using a stylus that's not possible. If you find a solution to calibrate the digitizer, please let me know!

I have the same exact problem and the same exact request. There must be some option to increase sensitivity to at least minimize this effect. It's the only flaw I can find on this otherwise wonderful device.
And honestly, for the prize it cost, I would expect this not to exist. But... I have it now and would like to be able to use it in it's full extent and power.

dammit
Nice to know I'm not the only one who notice that, but it's crazy how my finger seems preciser than my pen and even more, that in my Galaxy S the pen works perfectly. I was so happy to use some drawing apps on the tab but when I tried...
I tried in my Tab 7 2, then I'll try on my uncle's 10.1 just to check.

hello all,
just to report the same issue. i have same problem with my samsung galaxy tab 2 7" like you all here. i get this problem since the first time i bought it (about a month ago). drawing the lines and reading in landscape mode is choppy :crying: same as MrHyde03 said. i have been tested my cousin's tablet to draw diagonal line for comparison, he has galaxy tab p1000. and the line result i get, though his tab has wavy line too, but mine has more wavy line than his tablet. i didn't noticed his tablet has so wavy line, just a little. i did it with my finger.
i hope this issue can be fixed later.

could be a solution
I don't know if it's just for marketing or what, but maybe the original Samsung stylus is better for these screens.
I wish someone could certify this...

I bave The Same Problem... Vawy diagonal and arcs. The same pens and fingers works fine on my Asus TF 101...

I have the same problem
gonzogonzo said:
I bave The Same Problem... Vawy diagonal and arcs. The same pens and fingers works fine on my Asus TF 101...
Click to expand...
Click to collapse
Hi guys, I have the same problem. Horrible response when i draw with a (cheap) stylus and perfect when i do it with my fingers. Has anyone tried adonit jot pro or Dagi ??? Maybe they increase the contact area and it solves the problem. If so, please tell us!!!
Thanks for reading and waiting for a solution.

I know this is an old post, but I can't just abandon my own thread! I've done quite a bit of research on this since making this post, and sadly, it's the way the screen is. Strange that my Xperia Play and Galaxy S3 phones can do this, but the Tab 2 was given such a cheap screen. I ended up selling it and putting the money towards a Note 10.1 with S-pen, which works as I would expect it to.

Increase touch screen sensitivity?

Is there a way to make the touch screen more sensitive? As it is right now, I pretty frequently get touch inputs when I am actually just scrolling on the screen. I don't take my finger off (since I'm scrolling) but it thinks that I did as if I touched it. All the threads I could find talk about changing the spen sensitivity which I don't have any issues with. It's only hand touch input that I want to increase.
For comparison, with any apple device, nexus 4, or nexus 7 never get false touch input when scrolling. They never think I touched the screen when I am in the middle of scrolling.

Id recommend this one.
https://play.google.com/store/apps/details?id=br.shop4apps.touchscreenbooster.com
The sgs touchscreen booster works great for my note 10.1 8013 and my other samsung devices.
And that one doesn't work for you too good you can try this one this one works pretty good also.
https://play.google.com/store/apps/details?id=com.benja.touchscreensensit
Sent from my GT-N8000 using Tapatalk 2

Enable "show touches" in settings. It will help you see if it's a sensitivity issue or if you experience phantom touches.

[Q] DirectStylus Drawing/Sketching Experience?

Greetings! I am simply wondering if this tablet provides a decent drawing experience when compared to, say, the Galaxy Note line of products. I owned a Galaxy Note 8.0 which was wonderful, but after an unfortunate mishap, it's been rendered useless. I've been waiting for a tablet that is somewhat small, has an included stylus, and is very powerful (Stock Android is certainly another plus!). This seems to be the only device that fits the bill. I just want to know if actually feels like a pencil on paper from (hopefully) unbiased owners. I mainly intend to use ArtFlow and LayerPaint HD.

So nice to hear that there are people noticing that feature of the shield Tablet. So generally after some trys with different apps, Imo it works pretty well. But it can't be compared to an device with an active digitiser.
So you have your main focus on drawing. I would say you can have the same results as with an Spen for example. But you have to learn how to use the Direct Stylus.
In many reviews and threats & posts you will read about pressure sensitivity.
That not the truth. Direct stylus recognise the size of the tip touching the surface. There are two ways to achieve a bigger surface with this kind of stylus :
1. Press real hard on the display
That would be the normal "use" of an pen and an stylus with digitiser.
That is the reason you will read about flimsy tips of the stylus.
2. Twist the stylus while Drawing
When you take a look at the Tip of the stylus you can imagine, how the developers intend to use this kind of stylus .
For example when you want a decent line with a fine start, getting bigger till the end you have to start with the small tip and turn the stylus to a bigger spot.
l know it sounds unfamiliar, specially, when you are used to the Spen of Samsung, but after some tries it works quiet well.
As Nvidias CEO said during presentation , it depends on your personal skill..
Another important thing is the palm recognition.
It works most the time but it uses the same technique as pressure sensitivity. So it sometimes happen that when you lift or move your palm, You are giving an input. The best workaround is to activate the "stylus only mode " in the Menubar.
The annoying thing is, that you can't use pinch to Zoom or your Finger to move your workingsheet.
Hope I could give you a little clou on using the Direct Stylus on the shield Tablet.
If you got some more questions feel free to ask or pm me
Sent from my SHIELD Tablet using XDA Free mobile app

I use artflow on SHIELD and its ok. I love the stylus and it feels nice to draw with. Not sure if its the tablets senors or ArtFlow but sometimes it isnt accurate, where you think you're touching isn't what the tablet detects. I've only noticed this really with ArtFlow, Dabbler seems to be more accurate so I'm assuming its just the app itself. ArtFlow has rolled out updates for the Tegra k1 since I've downloaded it, so hopefully it gets better. I havn't tried Layer Paint yet.
---------- Post added at 10:52 PM ---------- Previous post was at 10:43 PM ----------
Hudrator said:
The annoying thing is, that you can't use pinch to Zoom or your Finger to move your workingsheet.
Click to expand...
Click to collapse
Pinch Zoom works fine for me in Stylus only mode for ArtFlow. It is a tad buggy, sometimes instead of zooming/moving it acts as an eraser...which is odd. But the undo button fixes it. Its not perfect but it works for me.

Thank you so much guys! Could either of you test a pencil on the display? It works with the Tegra NOTE 7 and some other devices like the Galaxy S4/ S5. Make sure it's dull so you don't destroy your screen if you do try it.

What about small curls?
Hi, stylus lovers!
I have a question to owners of Shield Tablet.
Some time ago I've tested my colleague's Tegra Note 7 tablet (EVGA branded).
That tablet has Direct Stylus too. And it's stylus "engine" has an distressing flaw: it "eats" small curles. For example if I'm writing small handwritten letter "b" (the upper oval first and then the lower oval) the upper oval will be drawn in very reduced size, almost to dot. But the lower oval will be almost normal. It applies other letters with upper curls like handwritten "f", "h", "k" and "l" too.
(I hope, my explanation and my English is not very ugly.)
So, the question is how Shield Tablet's stylus behave in such situation? Can you just write some handwritten phrase in any drawing app and check out if small curles of letters were "eaten"?
Thanks!

That's a thing I noticed too. But I think I can explain a little bit about that.
First of all, what you experienced there is also to see when you are writing with for example an Spen. You just really have to take a close look.
To make the input look cleaner the software kind of renders the detected input and round it up to make it look more fluid.
The picture I posted is out of the App "Write ". There you have a setting where you can choose how much the input gets rounded.
l turned up the setting from No 1 to No 5. The movement on the screen was the same in every line.
So you can see how much influence an App setting can make .
So you can't say yes or no to your question. For me the standard Android handwriting recognition makes a really good job in terms of showing what's been written on the Display without the chicken influence
OneNote is imo an negative example for that.
##### Can't post pictures at the moment.... #####
Sent from my SHIELD Tablet using XDA Free mobile app .

Hudrator said:
the software kind of renders the detected input and round it up to make it look more fluid
Click to expand...
Click to collapse
Thank for quick reply!
I fully understand that moment. I've spent a lot of time with S-Pen (Note 8 and Note 10.1 2014) and Tegra Note 7 too.
And I can state: S-Pen is more laggy but it don't eats small curls as Tegra Note 7 stylus does.
I played with several drawing apps on Tegra Note 7 and all of them behaves similarly in curl eating.
There is one stylus sensivity setup option in Tegra Note 7 and it doesn't give any good effect for my interest.
I've forgot to say clearly: my interest is not in handwriting recognition. I just want to have precise drawing and handwriting.
So, the question is: does Direct Stylus in Shield Tablet eat curls less than in Tegra Note 7?
Obviously my question sounds whimsy. But I can't do anything with it. I want precise stylus.

No you don't. I really can understand you. Had the same headache.
On shield tablet l can't find a setting like you mentioned.
I really would like to post some examples but the App won't let me do this for you. So I would say order it and try it on your own. Maybe you find a shop with an good return policy?
I can make thinks look like been eaten up but with the same app l can write the best texts. There it really depends on the kind of pencil & brush and thickness you choose ...
Really sorry mate
Sent from my SHIELD Tablet using XDA Free mobile app

So the stylus in the shield isn't active? It's just like any other capacitive stylus that emulates a finger, maybe a bit better?

{Diemex} said:
So the stylus in the shield isn't active? It's just like any other capacitive stylus that emulates a finger, maybe a bit better?
Click to expand...
Click to collapse
It's way way better.
Due to some Tegra's digitizing magic the Direct Stylus 2 performs like an active stylus. The most valuable advantage of Direct Stylus 2 over other capasitive stylus digitizers is very high sensivity and selectivity.
Here is good video on it:
https://www.youtube.com/watch?v=PaRT0E-RTPQ
And here is a video on older Tegra Note 7 (with an older Direct Stylus digitizer) digitizer comparison with S-Pen digitizer on Galaxy Note 8 and capasitive sensor of Nexus 7:
https://www.youtube.com/watch?v=wtZz4PjcAUk

@Kirrrr Thanks for the videos. It seems to me like they optimized the ability for the touchscreen digititzer to pick up the size of a touch. The soft tip of the pen changes its size depending on the way you hold it and the pressure. Reporting of touch size is actually build in to android. I tested it and different fingers report different sizes. My pinky 1 - 2, forefinger 2 - 4 and thumb 3 - 5. I think that lots of drawing apps don't take advantage of this because the variance is so small when using the same finger. It seems like they where using a customized version of sketchbook that actually takes the touch size into account. I doubt the tip is going to last long and it didn't look like the tip is replacable. Software wise what they did is impressive, but I think I'm going to skip this tablet.

LG K4 LTE (also known as K120 or Spree) has only 2 touch points?

Hello! 2 months ago, I bought an LG K4. It works really well for my needs, but lately, I've been noticing some touch screen errors (pressing a key on the keyboard and the phone thinks it's another one pressed, when typing fast that is). So, I downloaded AnTuTu off of Google Play and ran a multitouch test. To my surprise, the phone only made it to 2 touch points. Is this normal, or is it just my phone? What can I do to avoid replacing the digitizer?

Perhaps it doesn't support more than 2 touch points? As far as I understood the OP, you can't use more than 2 fingers to touch on the display, right?