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TOUCH PANEL AND CONTROL METHOD THEREOF

  • US 20090091552A1
  • Filed: 05/08/2008
  • Published: 04/09/2009
  • Est. Priority Date: 10/05/2007
  • Status: Abandoned Application
First Claim
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1. A touch panel, comprising:

  • a controller;

    at least one pixel which comprisesa touch choosing switch coupled to and controlled by the controller to turn on during a first time period and turn off during a second time period;

    a read switch coupled to and controlled by the controller to turn off during the first time period and turn on during the second time period; and

    a sensing capacitor having a touch-sensitive capacitance and being electrically connected with the touch choosing switch and the read switch to be charged, via the touch choosing switch, with a sensing charge during the first time period and to discharge the sensing charge, via the read switch during the second time period; and

    a sense reading unit electrically connected with the sensing capacitor via the read switch for outputting a sensed output value during the second time period;

    wherein the sensed output value is indicative of the whether the capacitance of the sensing capacitor has changed between the first and second periods, thereby indicating whether said pixel of the touch panel has been touched.

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