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Touchscreens and Credit Cards

Discussion in 'General Electronics Discussion' started by dm99, Apr 7, 2013.

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  1. dm99

    dm99

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    Oct 29, 2012
    I thought someone here might know the answer to this.

    On the older touch-screens on our POS equipment we could hit the screen with the edge of a credit card, the receipt tray, pen, etc and it would register the touch. We got two new displays (these are flat panels instead of tube) and they will not register unless you touch the screen with your finger.

    Why have they changed this in the newer screens?
     
  2. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Old ones were resistive (or IR optical grid since you mention tube) new ones are capacitance...
     
    Last edited: Apr 7, 2013
  3. dm99

    dm99

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    0
    Oct 29, 2012
    Are there modern displays that will pick up touch from plastic objects like credit cards or do all the new ones require use of your bare skin?
     
  4. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Sure, they still make resistive screens, they are quite common on lower end tablets... IR optical grid screens are still quite commonly used for kiosk and ATM style devices...
     
  5. davenn

    davenn Moderator

    13,622
    1,882
    Sep 5, 2009
    There's a mixture of both out there
    My HTC android phone is finger touch only
    Trimble equip I service has screens that respond to both
    other screens respond only to styli touch

    Dave
     
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