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Display device with touch sensor

  • US 10,768,755 B2
  • Filed: 06/22/2018
  • Issued: 09/08/2020
  • Est. Priority Date: 03/28/2008
  • Status: Active Grant
First Claim
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1. A display device having a capacitive touch sensor, comprising:

  • a first substrate;

    a second substrate facing the first substrate;

    a display function layer having an image display function, the display function layer being interposed between the first substrate and the second substrate, the second substrate having a display function layer side facing the display function layer and an upper surface side facing away from the display function layer side;

    a plurality of display pixel electrodes;

    a common electrode facing the display pixel electrodes, the display pixel electrodes and the common electrode being disposed between the first substrate and the display function layer;

    a control circuit that controls display of an image by applying a voltage to the display pixel electrodes and the common electrode based on an image signal;

    a touch detection electrode for the capacitive touch sensor that is disposed on the upper surface side of the second substrate, the touch detection electrode comprising a plurality of individual electrodes arranged in a matrix and overlapping the common electrode;

    a plurality of wires each of which is coupled to a respective one, and only one, of the individual electrodes on a one-to-one basis; and

    a touch detection circuit that detects a position touched by an object based on a detection signal obtained, through one of the wires, from its respective one of the individual electrodes constituting the touch detection electrode;

    wherein the common electrode is a single electrode overlapping the individual electrodes that are coupled to the touch detection circuit through the wires coupled to the individual electrodes on a one-to-one basis.

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