Display substrate, driving method thereof and display device for connecting touch electrodes with a common voltage

  • US 9,965,085 B2
  • Filed: 09/29/2015
  • Issued: 05/08/2018
  • Est. Priority Date: 03/31/2015
  • Status: Active Grant
First Claim
Patent Images

1. A display substrate, comprising:

  • a touch region, wherein;

    a plurality of touch electrodes are arranged in columns and rows at the touch region,the touch electrodes in each column are directly connected together,at a touch detection stage, the touch electrodes in each column at the touch region are disconnected from the touch electrodes in the other columns, andat a display stage, the touch electrodes in all the columns at the touch region are connected together and serve as common electrodes;

    at least one set of switching units; and

    for each switching unit in the at least one set of switching units, a control signal line connected to a control end of the switching unit, wherein;

    for each column of the columns, the touch electrodes in the column are connected to a first end of a corresponding switching unit in the at least one set of switching units,the touch electrodes in the respective columns at the touch region are connected to different switching units,second ends of the switching units in the at least one set of switching units are connected to each other,at the touch detection stage, the switching units in the at least one set of switching units are turned off under the control of the control signal line,at the display stage, the switching units in the at least one set of switching units are turned on under the control of the control signal line,the display substrate further comprises a plurality of rows of common electrode blocks (Vcom1) arranged at the touch region,the plurality of rows of common electrode blocks (Vcom1) and the rows of the touch electrodes are arranged in alternating rows, anda common voltage is applied to the plurality of rows of common electrode blocks (Vcom1) at the display stage and not at the touch detection stage.

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