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There are three different types of touch screens. Resistive, Capacitive, and Surface Acoustic Waves. The iPhone and iPod Touch use Capacitive method. The device contains a capacitive layer that stores the electrical charge. When a user touches the screen, the number of currents in that particular spot decreases because some of the currents are being deposited to the finger. The iPod/iPhone detects this change and the information is transferred the OS for analysis. After the device registers the touch, the data is captured and observed. The points where there was the most pressure are defined and the touch is more accurate. This information is sent to the operating system once more, and the action of button is performed. Of course, this happens instantaneously. The iPod Touch revolutionizes touch screen like never before, because multiple points can be recognized at one time, and many other touch screens cannot do that yet.

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13y ago
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14y ago

you just tuch it with your finger but dont press it to hard

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12y ago

By you working it

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Q: How do touch-screen I-Pods work?
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