Display device and method of driving the same

1. A display device comprising:

a display panel configured to display an image; and

a parasitic capacitor compensation circuit including a compensation capacitor connected to a sensing line of the display panel and a control switch configured to perform a switching operation so that the compensation capacitor has a predetermined capacitance,

wherein the compensation capacitor is connected to the sensing line responsive to the control switch being turned on in an image display operation during which the image is displayed on the display panel, and the compensation capacitor is disconnected from the sensing line responsive to the control switch being turned off in a sensing operation during which a characteristic of a subpixel of the display panel that is connected to the parasitic capacitor compensation circuit is sensed.

2. The display device of claim 1 , wherein the parasitic capacitor compensation circuit is disposed in a non-display area of the display panel.

3. The display device of claim 1 , wherein the parasitic capacitor compensation circuit is disposed inside a data driver driving the display panel.

4. The display device of claim 1 , wherein the parasitic capacitor compensation circuit is disposed in at least one of red, green, blue, and white subpixels.

5. The display device of claim 1 , wherein the control switch performs a switching operation for applying a DC power to the compensation capacitor.

6. The display device of claim 1 , wherein the compensation capacitor is charged with a voltage corresponding to a high potential voltage or a low potential voltage by a turn-on operation of the control switch.

7. The display device of claim 1 , wherein the sensing line has a capacitance according to a parallel connection between the compensation capacitor and a line capacitor, that is an intrinsic component of the sensing line, by a turn-on operation of the control switch.

8. The display device of claim 1 , wherein the control switch performs the switching operation according to a logic level of a switch control signal supplied from a timing controller.

9. A display device comprising:

a display panel including a plurality of subpixels;

a compensation circuit including a sensing transistor and a sensing line, the sensing transistor configured to sense a sensing node between a source electrode of a driving transistor included in each subpixel and an anode electrode of an organic light emitting diode included in each subpixel, the sensing line configured to transmit a sensing result obtained by the sensing transistor; and

a parasitic capacitor compensation circuit including a compensation capacitor connected to the sensing line of the compensation circuit and a control switch configured to perform a switching operation,

wherein the compensation capacitor is connected to the sensing line responsive to the control switch being turned on in an image display operation during which an image is displayed on the display panel by applying a voltage to the compensation capacitor and the compensation capacitor is disconnected from the sensing line responsive to the control switch being turned off in a sensing operation during which a characteristic of a subpixel of the plurality of subpixels that is connected to the parasitic capacitor compensation circuit is sensed by electrically floating the compensation capacitor.

10. The display device of claim 9 , wherein the control switch performs the switching operation for applying a DC power to the compensation capacitor.

11. The display device of claim 9 , wherein the compensation capacitor is charged with a voltage corresponding to a high potential voltage or a low potential voltage by a turn-on operation of the control switch.

12. The display device of claim 9 , wherein the sensing line has a capacitance according to a parallel connection between the compensation capacitor and a line capacitor, that is an intrinsic component of the sensing line, by a turn-on operation of the control switch.

13. A method of driving a display device including a display panel including a plurality of subpixels, a compensation circuit including a sensing transistor sensing a sensing node between a source electrode of a driving transistor included in each subpixel and an anode electrode of an organic light emitting diode included in each subpixel and a sensing line transmitting a sensing result obtained by the sensing transistor, and a parasitic capacitor compensation circuit including a compensation capacitor connected to the sensing line and a control switch performing a switching operation so that the compensation capacitor has a predetermined capacitance, the method comprising:

connecting the compensation capacitor to the sensing line responsive to the control switch being turned on in an image display operation during which the image is displayed on the display panel; and

disconnecting the compensation capacitor from the sensing line responsive to the control switch being turned off in a sensing operation during which a characteristic of a subpixel of the display panel of the plurality of subpixels that is connected to the parasitic capacitor compensation circuit is sensed.

14. The method of claim 13 , wherein when the control switch is turned on, a DC power is applied to the compensation capacitor.

15. The method of claim 14 , wherein the compensation capacitor is charged with a voltage corresponding to a high potential voltage or a low potential voltage by a turn-on operation of the control switch.

16. The method of claim 13 , wherein when the control switch is turned on, the sensing line has a capacitance according to a parallel connection between the compensation capacitor and a line capacitor that is an intrinsic component of the sensing line.