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Touch display panel and control circuit thereof

  • US 10,303,283 B2
  • Filed: 11/02/2015
  • Issued: 05/28/2019
  • Est. Priority Date: 10/10/2015
  • Status: Active Grant
First Claim
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1. A touch control circuit of a touch display panel, comprising:

  • a first shorting bar, which is provided thereon with first connecting lines for introducing source control signals;

    a second shorting bar, which is provided thereon with second connecting lines for introducing source test signals in a test stage, wherein all or part of the second connecting lines are used for receiving touch sensing signals in a touch control stage;

    a third shorting bar, which is provided thereon with third connecting lines for introducing gate control signals;

    a fourth shorting bar, which is provided thereon with fourth connecting lines for introducing gate test signals in the test stage, wherein all or part of the fourth connecting lines are used for introducing touch drive signals in the touch control stage;

    a source transistor switch array, source transistors of which are connected, through their gates, to the first connecting lines, and connect, through their sources and drains, the second connecting lines to data lines of the touch display panel, under an action of the source control signal; and

    a gate transistor switch array, gate transistors of which are connected, through their gates, to the third connecting lines, and connect, through their sources and drains, the fourth connecting lines to scan lines of the touch display panel, under an action of the gate control signals,wherein, in the touch control stage, all transistors in a display area are turned off;

    wherein a first measuring point and a second measuring point are connected to the gates of the source transistors of the source transistor switch array through the first connecting lines;

    a third measuring point, a fourth measuring point and a fifth measuring point are connected to the drains of the source transistors through the second connecting lines;

    the sources of the source transistors are connected to the data lines of the touch display panel;

    a sixth measuring point and a seventh measuring point are connected to the gates of the gate transistors of the gate transistor switch array through the third connecting lines;

    an eighth measuring point, a ninth measuring point and a tenth measuring point are connected to the drains of the gate transistors through the fourth connecting lines;

    the sources of the gate transistors are connected to the scan lines of the touch display panel;

    a number of the gates of the source transistors connected to the first measuring point is less than that of the source transistors connected to the second measuring point;

    a number of the drains of the source transistors connected to the third measuring point is equal to that of the source transistors connected to the fourth measuring point, and is less than that of the source transistors connected to the fifth measuring point;

    a number of the gates of the gate transistors connected to the sixth measuring point is less than that of the gate transistors connected to the seventh measuring point;

    a number of the drains of the gate transistors connected to the eighth measuring point is equal to that of the gate transistors connected to the ninth measuring point, and is less than that of the gate transistors connected to the tenth measuring point.

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