Display device, driving circuit, method for driving display device, and electronic apparatus

  • US 9,773,148 B2
  • Filed: 12/30/2014
  • Issued: 09/26/2017
  • Est. Priority Date: 03/07/2014
  • Status: Active Grant
First Claim
Patent Images

1. A display device, comprising:

  • a display panel provided with a plurality of display electrodes, the display electrodes configured to display images, wherein the display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are further configured to implement a fingerprint sensing, and a stage during which the first electrodes perform the fingerprint sensing is defined as a fingerprint sensing stage, wherein a stage during which the first electrodes perform image display is defined as an image display stage, the display panel is further provided with a common electrode, and the common electrode and each display electrode serve as two polar plates of one sub-pixel unit in the display panel; and

    a driving circuit comprising;

    a common voltage generation circuit connected with the common electrode and configured to provide a common voltage to the common electrode, wherein the two polar plates of each sub-pixel unit are applied with the common voltage and a display signal in the form of a pixel voltage respectively, to display the images; and

    a first signal generation circuit connected with the common electrode and configured to provide a first signal, wherein the driving circuit is configured to;

    provide the display signals to the display electrodes to display the images, provide a fingerprint sensing signal to the first electrodes and perform a self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing, andcontrol the common voltage generation circuit to provide the common voltage to the common electrode during the image display stage; and

    control the first signal generation circuit to provide the first signal to the common electrode during the fingerprint sensing stage, for reducing electric quantities in charging and discharging capacitors formed by the first electrodes and the common electrode during the fingerprint sensing.

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