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Could one use a capacitor to enhance a capacitive stylus?

  1. Dec 4, 2013 #1
    I don't well understand capacitance and its use in touch screens. Just had a crazy idea that you could involve a charged capacitor to enhance the accuracy of a stylus.
     
  2. jcsd
  3. Dec 4, 2013 #2

    davenn

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    capacitive touchscreens don't use a stylus they require finger touch

    have a look at this wiki page .... scroll down to the capacitive section....

    if the touchscreen responds to stylus or finger then it will be a resistive touchscreen

    Dave
     
  4. Dec 4, 2013 #3
  5. Dec 4, 2013 #4
    What I'd like to know is which direction is the field that is measured?
    into or out of the plane
     
  6. Dec 4, 2013 #5

    davenn

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    its measured across/along the plane
    ie. between the place of touch and the 4 corners of the touch panel


    Dave
     
  7. Dec 5, 2013 #6
    You can absolutely use a stylus on a capacitive screen. I am using one as I write this on my iPad, which is capacitive. You need a special capacitive stylus, though. It is conductive and typically has a rubber-like tip.
     
  8. Dec 5, 2013 #7

    davenn

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    yeah a special one , not some random pointer of some sort

    that's what makes them so incompatible for easy everyday use

    Dave
     
  9. Dec 6, 2013 #8
    What I want to do is have a mono pole capacitor so that the tip size can be reduced. I'm probably concepting it wrong though to think that would work. Essentially it would be static electricity on a stick.
     
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