In-cell touch panel and display device

  • US 10,459,573 B2
  • Filed: 08/21/2015
  • Issued: 10/29/2019
  • Est. Priority Date: 01/16/2015
  • Status: Active Grant
First Claim
Patent Images

1. An in-cell touch panel, comprising:

  • an upper substrate and a lower substrate which are opposite to each other;

    a plurality of separate self-capacitive electrodes, arranged in an array and in a same layer;

    a plurality of conductive wires connected with the self-capacitive electrodes, wherein the in-cell touch panel is configured for detecting a touch through detecting capacitance change of each of the self-capacitive electrodes; and

    a touch control detection chip, configured to determine a touch position in a touch control time period by detecting a capacitance variation of each of the self-capacitive electrodes, wherein the plurality of the conductive wires connect the plurality of separate self-capacitive electrodes to the touch control detection chip,wherein;

    each of the self-capacitive electrodes is provided with a plurality of hollowed-out regions disposed in rows and columns;

    the in-cell touch panel further comprises a plurality of display pixels, each of which is provided with an opening region;

    the hollowed-out regions of each self-capacitive electrode each correspond to the opening region of at least one display pixel, and an orthographic projection of the opening region of the at least one display pixel on the each self-capacitive electrode falls within the corresponding hollowed-out region;

    the in-cell touch panel further comprises common electrodes which are disposed in a same layer as the self-capacitive electrodes, respectively arranged within the hollowed-out regions of the self-capacitive electrodes, and insulated from the self-capacitive electrodes;

    the touch control detection chip is further configured to apply a common electrode signal to the common electrodes in a display time period;

    the in-cell touch panel has a driving mode in which a first driving for touch function and a second driving for display function are performed simultaneously; and

    each of the self-capacitive electrodes corresponds to a plurality of pixels disposed on the lower substrate, and the common electrodes are respectively arranged at least at positions, to which opening regions of the pixels respectively correspond.

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