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SIGNAL PROCESSING CIRCUIT OF TOUCH SCREEN

  • US 20140247241A1
  • Filed: 03/14/2013
  • Published: 09/04/2014
  • Est. Priority Date: 03/04/2013
  • Status: Active Grant
First Claim
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1. A signal processing circuit of a touch screen, comprising:

  • a plurality of driving lines and a plurality of sensing lines arranged to interact with one another in a touch screen panel;

    power sources respectively supplying power to each of the driving lines;

    sensing channels respectively connected to the sensing lines, wherein each sensing channel is configured to detect a touch by sensing a mutual capacitance on a node where the respective sensing line interacts with a driving line of the plurality of driving lines;

    a driving line switch for each driving line, selectively connecting the respective power source to the driving line;

    a channel switch for each sensing channel, selectively connecting the respective sensing channel to the sensing line; and

    a bypass line configured to connect a driving line of the plurality of driving lines to a sensing line of the plurality of sensing lines by operation of the respective channel switch.

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