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Control device and method with compensation of coordinate calculating for a capacitive touch panel

  • US 20070291011A1
  • Filed: 09/12/2006
  • Published: 12/20/2007
  • Est. Priority Date: 06/20/2006
  • Status: Active Grant
First Claim
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1. A control method for a capacitive touch panel that has a substrate, a top conductive layer and a bottom conductive layer, the method comprising the steps of:

  • applying AC signals with the same amplitude to corners of the top conductive layer respectively;

    detecting first current values of the corners of the top conductive layer;

    detecting a second current value of the bottom conductive layer;

    compensating each detected first current value based on the second current value; and

    calculating coordinate data of a position being touched on the touch panel according to the compensated first current values.

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