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Driving method for reducing display interference in in-cell multi-touch panel and system using the same

  • US 10,067,605 B2
  • Filed: 04/07/2014
  • Issued: 09/04/2018
  • Est. Priority Date: 04/10/2013
  • Status: Active Grant
First Claim
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1. A driving method for reducing display interference in an in-cell multi-touch panel having a thin film transistor (TFT) layer, a sensing electrode layer, and a common voltage and touch driving layer, wherein the TFT layer having K gate lines and L source lines, the sensing electrode layer having M sensing lines, the common voltage and touch driving layer having N touch driving lines, where K, L, N, M are positive integers respectively, the driving method comprising:

  • providing a display driving signal to the K gate lines and a display pixel signal to the L source lines so as to drive corresponding transistors and capacitors in a display frame for displaying an image; and

    providing a touch driving signal to the N touch driving lines and receiving touch signals from the M sensing lines so as to detect touch point positions of an external object in a touch frame,wherein the touch frame and the display frame are synchronous and have the same time width thereby being integrated as a touch display frame in which a first touch driving signal is provided substantially close to a first display driving signal and a last touch driving signal is substantially close to a last display driving signal, and sequence of providing the touch driving signal to the N touch driving lines in a J-th touch display frame is different from that in a (J+1)-th touch display frame;

    wherein, in the J-th touch display frame, the touch driving signal is sequentially provided, starting from an i-th touch driving line and, in the (J+1)-th touch display frame, the touch driving signal is sequentially provided, starting from an (i+1)-th touch driving line, where J and i are positive integers respectively and i=2 to N.

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