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IN-CELL MULTI-TOUCH PANEL SYSTEM WITH LOW NOISE AND TIME DIVISION MULTIPLEXING AND ITS DRIVING METHOD

  • US 20140354590A1
  • Filed: 05/28/2014
  • Published: 12/04/2014
  • Est. Priority Date: 05/28/2013
  • Status: Active Grant
First Claim
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1. An in-cell multi-touch panel system with low noise and time division multiplexing, comprising:

  • an in-cell touch display panel, for displaying an image signal and sensing an external object; and

    a touch display control system connected to the in-cell touch display panel, for sequentially outputting a display driving signal to the in-cell touch display panel so as to display the image signal, and for sequentially outputting a touch driving signal to the in-cell touch display panel for sampling a sensing voltage from the in-cell touch display panel so as to determine whether there is the external object,wherein, the touch display control system drives the in-cell touch display panel and samples the sensing voltage from the in-cell touch display panel to determine whether there is the external object and noise interference during a first frame time interval, the touch display control system finds out a frequency with the minimum noise for use as a frequency of the touch driving signal when the noise interference exists during a second frame time interval, and the touch display control system is based on the frequency with minimum noise to correspondingly generate the touch driving signal so as to determine whether there is the external object during a third frame time interval.

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