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IN-CELL CAPACITIVE TOUCH PANEL

  • US 20100079406A1
  • Filed: 03/17/2009
  • Published: 04/01/2010
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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1. An in-cell capacitive touch panel comprisinga first gate line and a second gate line;

  • anda sensing unit further comprising;

    at least one sensing liquid crystal capacitor;

    a first transistor connected to said first gate line and said sensing liquid crystal capacitor and controlled by said first gate line to charge said sensing liquid crystal capacitor; and

    a second transistor and a third transistor coupled to each other, wherein said second transistor is connected to a first electrode of said sensing liquid crystal capacitor;

    said third transistor is connected to said second gate line and a readout line;

    said second transistor generates an output current to said third transistor according to voltage of said first electrode of said sensing liquid crystal capacitor;

    said second gate line controls said third transistor to transfer said output current to said readout line.

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