Become a member of the iLounge Forums. Register Now!
To start viewing messages, select the forum that you want to visit from the selection below.
If this is your first visit, be sure to check out the Forum FAQ and Forum Policy.

Topic: what makes the ipod touchscreen different from other kinds ?

Reply Thread Tools Topic Search
Old 01-25-2008, 01:15 PM
#1
 
Junior Lounger
 
Join Date: Apr 2005
Posts: 73
what makes the ipod touchscreen different from other kinds ?

i was playing around with my dad's PDA Palm device and noticed the touchscreen was a little different, like it responded to the tap of my finger nail while in the touch it doesnt. But i found my touch more responsive.

can any1 explain..... thnks

(is the touchscreen on the ipod touch a new generation of touchscreens?)
rg3n is offline  
Reply With Quote

Join the iLounge Community and the ad above will disappear.

Old 01-25-2008, 01:35 PM
#2
 
Pro Lounger
 
Join Date: Oct 2006
Location: Lynnwood, WA
Posts: 795

From what I understand, the iPod touch has a heat-sensitive screen. That is why it does not respond to regular styli or finger nails. Someone please correct me if I am wrong.



iPhone 3GS (32GB black) / Sennheiser MM200
Mac OS X 10.6 (Snow Leopard) / MacBook (Black, 160GB HDD, 2GB RAM)
Kubuntu 8.04 (Hardy Heron) / Shuttle XPC SK22G2-V2
daihard is offline  
Reply With Quote
Old 01-25-2008, 01:39 PM
#3
 
A Bit Outdated
 
Join Date: Apr 2005
Location: Byron, NY
Posts: 1,522

I was under the impression that a company was making a stylus for iPod touch.

It may have been for iPhone, though.



iPod 4G 20GB | iPod 5G 30GB | iPod nano 1G 1GB | iPod touch 16GB
"You roll on the floor drenched in smiles and smoke and you're laughing your head off at something misspoken."
pohatu771 is offline  
Reply With Quote
Old 01-25-2008, 01:44 PM
#4
 
Senior Lounger
 
Join Date: Nov 2007
Posts: 138

Quote:
Originally Posted by daihard
From what I understand, the iPod touch has a heat-sensitive screen. That is why it does not respond to regular styli or finger nails. Someone please correct me if I am wrong.
Correct. It's the same for Touch and iPhone. This also means it can operate under glass and the multitouch capability is different from most touch screens as well.
Dumb Monkey is offline  
Reply With Quote
Old 01-25-2008, 01:46 PM
#5
 

 
Join Date: Feb 2004
Location: Cincinnati
Posts: 12,172

I am not sure what technology Apple used in making the touchscreen. I do know that it is multi-touch though. This means that you can use more than one finger to do things. Most tasks require the use of just one finger but you can zoom in on a picture and website by pinching it or zoom out by un-pinching it. Most other touchscreens support only one input and it must come from a blunt object such as a stylus or finger tip. The iPod touch can use your actual finger (ie where your fingerprints are taken from) to conduct tasks. The iPod touch also has a glass covering over the LCD panel while other PDA touchscreens have some type of thin, flexible plastic cover. So not only does the iPod touch screen have better responsiveness, it is also better protected against scratches.



64GB iPhone 5 | 64GB iPad mini | AppleTV 2 (2012) | AppleTV 2 (2010) | 4GB 3G iPod shuffle | 2012 15" MacBook Pro, 1TB SSHD, 16GB DDR3 1600 MHz, OS X 10.8.4 Mountain Lion | Apple Lossless | iTunes AAC -Q 68 | iTunes 11.1 | Library size = 1.78TB | Legacy iPods: 3G 40GB, 4G 40GB, 5G 60GB, 160GB iPod classic (2009)
kornchild2002 is offline  
Reply With Quote
Old 01-25-2008, 01:57 PM
#6
 
Power Lounger
 
Join Date: Oct 2007
Posts: 1,306

Quote:
Originally Posted by daihard
From what I understand, the iPod touch has a heat-sensitive screen. That is why it does not respond to regular styli or finger nails. Someone please correct me if I am wrong.
Quote:
Originally Posted by Dumb Monkey
Correct. It's the same for Touch and iPhone. This also means it can operate under glass and the multitouch capability is different from most touch screens as well.
no, this is not correct actually.
if the ipod would use a heat-sensitive touchscreen it would not work the moment the air temperature would be the same as your bodys temperature.
the ipod touch actually has an electrical field below the screens glass. electrons "flow" in there and there are sensors on the screens edge which measure how much electrons actually arrive on each screen edge. if you tap the screen you distort the electrical field, which just means a different number of electrons than usual "arrive" at the sensors - a touch is noticed.
you can test it easily: try to tap the screen with anything that's made out of plastic - it will not work since plastic does not conduct electricity.
this is also the reason you can't use the iphone or ipod touch with a PDA pen btw, because their tops are usually made out of plastic.

PS: no guarantees all of this is right. I'm not very good in understand those physic-things, but basically this is how it works somehow.

and that's the main difference between a PDA touchscreen and a ipod/iphone touchscreen: it just uses a different technology. while a PDA reacts on pressure, the ipod/iphone uses the electical field thing.
I believe the reason for your fingernail not working is that a fingernail does not conduct electricity, but I'm not 100% sure on that.

FYI: the touchscreen technology the ipod uses is the most advanced and most expensive on the market right now.

edit: just found this on apples website. seems I was right (well, I know I was right since I tested it myself, but this is the proove )
http://images.apple.com/iphone/featu...ro20071019.png

Last edited by BlackWolf; 01-25-2008 at 02:02 PM.
BlackWolf is offline  
Reply With Quote
Old 01-25-2008, 02:13 PM
#7
 
Great Lakes Lounger
 
Join Date: Oct 2007
Posts: 72

The iPod touch and iPhone do not have a heat-sensitive screen, but rather it uses electrical capacitance. It's a bit long to explain out here but the folks at HowStuffWorks do a fine job explaining the Apple's use of multitouch compared to past systems used in PDAs:

http://electronics.howstuffworks.com/iphone.htm

For what's it worth, while most PDAs in a past 4-5 years have been using plastic screens, glass was used rather extensively before that. In fact, glass was often preferred by longtime users simply because it was less "squishy" when using the stylus. Plus, plastic can scratch up a bit easier, and thankfully Apple switched the iPhone to a glass display just prior to release.

Of course, those glasstop devices had the problem that they could shatter.

EDIT: BlackWolf was speedier than I in the reply. The HowStuffWorks article still might hold an interest for some, so I'll leave up the post.
Allocentric is offline  
Reply With Quote
Old 01-25-2008, 02:14 PM
#8
 
Veteran Lounger
 
Join Date: Jun 2005
Location: Back Home In Indiana
Posts: 2,710

From iPod Observer - http://www.ipodobserver.com/story/31942

Quote:
The iPhone uses the more advanced projected capacitive technology, and those don't need actual contact. Capacitive sensors behind the glass sense when the electrical field is disturbed. They can detect the finger from as far as 2 mm away. This allows for a more intuitive feel as the finger can glide across the surface. Since there's no resistive film, this kind of display can also be brighter.



Found on a Firewire cable - If you need to detain a burglar until the authorities arrive, this FireWire cable can render approximately three perpetrators immobile when properly hog-tied.
DerekVOF is offline  
Reply With Quote
Old 01-25-2008, 03:48 PM
#9
 
Pro Lounger
 
Join Date: Oct 2006
Location: Lynnwood, WA
Posts: 795

Ah, thanks for the correct information. It's great to be able to learn something new.

So I guess that the styli that do work with iPod touch have the tops that conduct electricity?



iPhone 3GS (32GB black) / Sennheiser MM200
Mac OS X 10.6 (Snow Leopard) / MacBook (Black, 160GB HDD, 2GB RAM)
Kubuntu 8.04 (Hardy Heron) / Shuttle XPC SK22G2-V2
daihard is offline  
Reply With Quote
Old 01-25-2008, 03:52 PM
#10
 
iPhone 3G Owner
 
Join Date: Jan 2008
Location: Miami
Posts: 607

The iPod Touch screen along with all the iPod Scroll Wheels are heat-sensitive. They do not respond to a stylus or your fingernails.
Stay Alive 305 is offline  
Reply With Quote
Old 01-25-2008, 04:00 PM
#11
 

 
Join Date: Feb 2004
Location: Cincinnati
Posts: 12,172

Quote:
Originally Posted by Stay Alive 305
The iPod Touch screen along with all the iPod Scroll Wheels are heat-sensitive. They do not respond to a stylus or your fingernails.
I guess we didn't read the technical documents and posts from above? The iPod touch is not heat sensitive, it uses small electrical pulses to determine if it is being touched or not. Heat has nothing to do with it. Don't believe me/us? Try sticking your finger under your shirt and then controlling the iPod. Let that area of your shirt warm up first. You won't be able to control your iPod touch at all. This is because your shirt (which is more than likely made of cotton) can't conduct electricity. If it was heat controlled then the screen would be constantly confused if you took it outdoors and let the sunlight come in direct contact with the screen. The body has a temperature of around 98 degrees F. That means that the iPod touch could not be used outdoors where I live as the ambient air can easily get up to 112 degrees F during the summer. The iPod touch would think it is being touched all the times.

As for electricity conducting styli, I have no idea. I don't imagine there are any as this type of touchscreen is still pretty new. Tablet PC's used to have electrical conducting pens that controlled them, you use to have to put two AAA batteries in the pen in order for it to work. Now they use some type of technology developed by Wacom that doesn't require any electricity to come from the pen. I don't know what technology that is but it is different from the traditional stylus, the iPod touch, and the traditional touchscreen which responded to pressure. Heat touchscreens would never, ever work unless they were used to make heat imprints of someones hand. They would have to be used indoors with an ambient air temperature of less than 90 degrees as the human body can get down to around 96 degrees when someone is sick or 99 degrees when someone has a fever.



64GB iPhone 5 | 64GB iPad mini | AppleTV 2 (2012) | AppleTV 2 (2010) | 4GB 3G iPod shuffle | 2012 15" MacBook Pro, 1TB SSHD, 16GB DDR3 1600 MHz, OS X 10.8.4 Mountain Lion | Apple Lossless | iTunes AAC -Q 68 | iTunes 11.1 | Library size = 1.78TB | Legacy iPods: 3G 40GB, 4G 40GB, 5G 60GB, 160GB iPod classic (2009)

Last edited by kornchild2002; 01-25-2008 at 04:04 PM.
kornchild2002 is offline  
Reply With Quote
Old 01-25-2008, 04:10 PM
#12
 
iPhone 3G Owner
 
Join Date: Jan 2008
Location: Miami
Posts: 607

Quote:
Originally Posted by kornchild2002
I guess we didn't read the technical documents and posts from above? The iPod touch is not heat sensitive, it uses small electrical pulses to determine if it is being touched or not. Heat has nothing to do with it. Don't believe me/us? Try sticking your finger under your shirt and then controlling the iPod. Let that area of your shirt warm up first. You won't be able to control your iPod touch at all. This is because your shirt (which is more than likely made of cotton) can't conduct electricity. If it was heat controlled then the screen would be constantly confused if you took it outdoors and let the sunlight come in direct contact with the screen. The body has a temperature of around 98 degrees F. That means that the iPod touch could not be used outdoors where I live as the ambient air can easily get up to 112 degrees F during the summer. The iPod touch would think it is being touched all the times.

As for electricity conducting styli, I have no idea. I don't imagine there are any as this type of touchscreen is still pretty new. Tablet PC's used to have electrical conducting pens that controlled them, you use to have to put two AAA batteries in the pen in order for it to work. Now they use some type of technology developed by Wacom that doesn't require any electricity to come from the pen. I don't know what technology that is but it is different from the traditional stylus, the iPod touch, and the traditional touchscreen which responded to pressure. Heat touchscreens would never, ever work unless they were used to make heat imprints of someones hand. They would have to be used indoors with an ambient air temperature of less than 90 degrees as the human body can get down to around 96 degrees when someone is sick or 99 degrees when someone has a fever.
LOL I just got owned. =]

Thanks for that info! I didn't know that.
Stay Alive 305 is offline  
Reply With Quote
Old 01-25-2008, 05:01 PM
#13
 
Junior Lounger
 
Join Date: Apr 2005
Posts: 73

haha really interesting stuff, thanks guys for clearing things up for me
rg3n is offline  
Reply With Quote
Old 01-25-2008, 05:34 PM
#14
 

 
Join Date: Feb 2004
Location: Cincinnati
Posts: 12,172

Quote:
Originally Posted by Stay Alive 305
LOL I just got owned. =]

Thanks for that info! I didn't know that.
Don't worry, we all make mistakes. I wasn't trying to single you out or anything. I just didn't want people to read your post and get confused. That is all



64GB iPhone 5 | 64GB iPad mini | AppleTV 2 (2012) | AppleTV 2 (2010) | 4GB 3G iPod shuffle | 2012 15" MacBook Pro, 1TB SSHD, 16GB DDR3 1600 MHz, OS X 10.8.4 Mountain Lion | Apple Lossless | iTunes AAC -Q 68 | iTunes 11.1 | Library size = 1.78TB | Legacy iPods: 3G 40GB, 4G 40GB, 5G 60GB, 160GB iPod classic (2009)
kornchild2002 is offline  
Reply With Quote
Old 01-25-2008, 06:06 PM
#15
 
Veteran Lounger
 
paranoidxe's Avatar
 
Join Date: Jan 2006
Posts: 3,316

Interesting because when I'm out in the cold I find the screen to be quite less responsive when my hands are cold.



iPod Shuffle [2GB/3G] -- iPod Video 240GB -- iPod Classic 120GB -- iPod Nano 16GB [4G] -- iPod Shuffle [2GB/2G] -- iPod Shuffle 4GB
Retired: 5G 60GB, 80GB, Classic 80GB, 2G Shuffle 1GB, iPod Touch 1G 16GB, 1G Nano, 2G Nano
paranoidxe is offline  
Reply With Quote

Topic: what makes the ipod touchscreen different from other kinds ?

Reply Thread Tools Topic Search

Become a member of the iLounge Forums. Register Now!
To start viewing messages, select the forum that you want to visit from the selection below.
If this is your first visit, be sure to check out the Forum FAQ and Forum Policy.
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





View iLounge History. Read our old Forums Archive (2001-2003)
All times are GMT -4. The time now is 11:40 PM.


Shop for Accessories: Cases, speakers, chargers, etc.