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In-cell capacitive touch panel

  • US 8,441,459 B2
  • Filed: 03/17/2009
  • Issued: 05/14/2013
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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1. An in-cell capacitive touch panel comprising:

  • a first gate line;

    a second gate line; and

    a sensing unit comprising;

    at least one sensing liquid crystal capacitor;

    a first transistor,being controlled by said first gate line to charge said sensing liquid crystal capacitor and to generate a reference voltage at a first electrode of said sensing liquid crystal capacitor, and comprisinga drain being connected to said first gate line;

    a source being connected to said sensing liquid crystal capacitor; and

    a gate being connected to said first gate line and said sensing liquid crystal capacitor, wherein said reference voltage is adjusted based on a voltage of said first gate line and a voltage variation Δ

    Vp of said reference voltage is expressed by an equation;

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