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

A display device, comprising:

• a display panel provided with a plurality of display electrodes, the display electrodes located within a predetermined region of the display panel are defined as first electrodes and a plurality of display electrodes located outside the predetermined region are defined as the second electrodes wherein a stage during which the first electrodes perform image display is define 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 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 a fingerprint sensing signal to the first electrodes and perform a self-capacitance detection on the first electrodes, to implement a fingerprint sensing, and provide the display signals to the second electrodes to display the images, and
• control 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.

A driving circuit for a display device, wherein the display device comprises a display panel provided with a plurality of display electrodes, the display electrodes are configured to display images, the display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are 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 define 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
• the driving circuit is configured to:
• provide display signals to the display electrodes, to display the images wherein the display signals are pixel voltages;
• provide a fingerprint sensing signal to the first electrodes and perform a self-capacitance detection on the first electrodes, to implement the fingerprint sensing;
• and
• provide the fingerprint sensing signal to the first electrodes to perform the fingerprint sensing during the fingerprint sensing stage, wherein the driving circuit comprises:
• 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 one of the pixel voltages 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 further configured to:
• control 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.

A method for driving a display device, wherein the display device comprises a display panel provided with a plurality of display electrodes, the display electrodes are configured to display images, the display electrodes located within a predetermined region of the display panel are defined as first electrodes, the first electrodes are 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
• the method comprises:
• providing display signals to the display electrodes to display the images, wherein the display signals are pixel voltages;
• and
• providing a fingerprint sensing signal to the first electrodes and performing a self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing, wherein the process of providing the display signals to the display electrodes to display the images comprises:
• providing a common voltage to the common electrode, wherein the two polar plates of each sub-pixel unit are applied with the common voltage and one of the pixel voltages respectively to display the images;
• and
• the process of providing the fingerprint sensing signal to the first electrodes and performing the self-capacitance detection on the first electrodes during the fingerprint sensing stage, to implement the fingerprint sensing comprises:
• providing a 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.

A display device, comprising:

• a display panel comprising a plurality of pixel units and a plurality of data lines connected with the pixel units, wherein each pixel unit comprises one display electrode, the display electrodes are configured to display images, the pixel units located within a predetermined region of the display panel are defined as first pixel units, the display electrodes of the first pixel units are defined as first electrodes, and the first electrodes are configured to implement a fingerprint sensing, wherein a stage during which the first electrodes perform image display is define 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 data line driving circuit connected with the pixel units via the data lines, wherein the data line driving circuit is configured to provide display signals to the display electrodes of the pixel units via the data lines to display the images, wherein the display signals are pixel voltages;
• wherein the display panel further comprises transmission lines, and the display device further comprises:
• a fingerprint sensing detection circuit connected with the first pixel units via the transmission lines, the fingerprint sensing detection circuit being configured to provide a fingerprint sensing signal to the first electrodes of the first pixel units via the transmission lines and implement a fingerprint sensing by detecting self-capacitances of the first electrodes;
• wherein the display device further comprises 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 one of the pixel voltages 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 display device is further configured to;
• control the first electrodes to perform the fingerprint sensing or image display;
• and
• control 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.