how does a touch screen work?

how does a touch screen work give detail please

3 Answers

  • 1 decade ago
    Favorite Answer

    Well, I'm assuming you're asking for the technical details, as not realise a touch screen works by touch is just... well... silly.

    Anyway, there are 2 main types of touch screen, surface acoustic wave, which are a small pad above a normal screen which high frequency acoustic waves through the screen, pressing the screen stops one of those waves and therefore indicates the screen has been touched. These require calabrating so the software knows where you've touched (as they aren't part of the same screen), this is the screen used in the DS and DSL (not sure about the DSi).

    The second type is capacitive which is part of the same screen, what happens is instead of it working through presure it works by

    "discharging" itself, this type of screen is used in new devices such as the LG Arena and iPod Touch/iPhone.

    A good source for information might be Wikipedia (not actually checked it) ->

    Other than that, look on Google for SAW (Sound Acoustic Wave) and Capactive screens.

  • 1 decade ago

    you touch it... as detailed as it gets

  • 5 years ago

    extremely tough thing. do a search onto bing and yahoo. it might help!

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