Display device including touch panel and method of driving display device including touch panel
A display device includes a display panel including pixels, a touch panel including electrodes, a proximity sensor which is adjacent to the touch panel and detects proximity with respect to an object based on a capacitance variation, a display driver which drives the display panel and a touch controller which drives the touch panel and the proximity sensor. Here, the touch controller provides a negative voltage to the proximity sensor when the proximity sensor detects that the object approaches the proximity sensor such that a shortest distance from the object to the proximity sensor is equal to or less than a first reference distance.
1. A display device which detects an object, the display device comprising:
a display panel including pixels;
a touch panel including electrodes;
a proximity sensor which is adjacent to the touch panel and detects proximity with respect to the object based on a capacitance variation;
a display driver which drives the display panel; and
a touch controller which drives the touch panel and the proximity sensor,
wherein the touch controller provides a negative voltage to the proximity sensor when the proximity sensor detects that the object approaches the proximity sensor such that a shortest distance from the object to the proximity sensor is equal to or less than a first reference distance.
2. The display device of claim 1 , wherein the display panel stops displaying an image when the proximity sensor detects that the object approaches the proximity sensor such that the shortest distance from the object to the proximity sensor is equal to or less than a second reference distance, which is less than the first reference distance.
3. The display device of claim 2 , wherein the proximity sensor is disposed on one side of wires of the touch panel while being spaced apart from the electrodes of the touch panel.
4. The display device of claim 2 , wherein the touch controller provides a voltage of about 0 volt to the proximity sensor when the proximity sensor detects that the object moves away from the proximity sensor such that the shortest distance from the object to the proximity sensor is greater than or equal to the first reference distance.
5. The display device of claim 2 , wherein the touch controller provides a voltage of about −3 volts to the proximity sensor when the proximity sensor detects that the object approaches the proximity sensor such that the shortest distance from the object to the proximity sensor is equal to or less than the first reference distance.
6. The display device of claim 5 , wherein the touch controller activates a call mode of the display device when the proximity sensor detects that the object approaches the proximity sensor such that the shortest distance between the proximity sensor and the object is equal to or less than the second reference distance.
7. The display device of claim 5 , wherein the proximity sensor is disposed in a bezel area of the display panel in which the image is not displayed.
8. The display device of claim 5 , wherein the proximity sensor includes an input node and an output node, and the touch controller determines a status of connection between the input node and the output node of the proximity sensor.
9. The display device of claim 5 , wherein the object is a face of a user, and
the proximity sensor detects proximity with respect to the face of the user based on the capacitance variation.
10. The display device of claim 5 , wherein the touch controller drives the touch panel in a mutual capacitance sensing scheme.
11. The display device of claim 5 , wherein the touch controller drives the touch panel in a self-capacitance sensing scheme.
12. The display device of claim 5 , wherein the display driver determines whether to display the image on the display panel according to an activation state of a call mode.
13. A method of driving a display device, the method comprising:
detecting proximity with respect to an object based on a capacitance variation;
driving a proximity sensor according to a proximity state of the object;
providing a negative voltage to the proximity sensor when detecting that the object approaches the proximity sensor such that a shortest distance from the object to the proximity sensor is equal to or less than a first reference distance; and
stopping displaying an image when detecting that the object approaches the proximity sensor such that the shortest distance from the object to the proximity sensor is equal to or less than a second reference distance, which is less than the first reference distance.
14. The method of claim 13 , wherein the proximity sensor is disposed on one side of wires of the touch panel while being spaced apart from the electrodes of the touch panel.
15. The method of claim 13 , wherein the driving the proximity sensor includes providing a voltage of about 0 volt to the proximity sensor when the proximity sensor detects that the object moves away from the proximity sensor such that the shortest distance from the object to the proximity sensor is greater than or equal to the first reference distance.
16. The method of claim 13 , wherein the negative voltage includes a voltage of about −3 volts.
17. The method of claim 16 , further comprising:
activating a call mode when the proximity sensor detects that the object approaches the proximity sensor such that the shortest distance between the proximity sensor and the object is equal to or less than the second reference distance.
18. The method of claim 17 , wherein the object is a face of a user, and
the proximity sensor detects proximity with respect to the face of the user based on the capacitance variation.
19. The method of claim 17 , further comprising:
driving the touch panel in a mutual capacitance sensing scheme.
20. The method of claim 17 , further comprising:
driving the touch panel in a self-capacitance sensing scheme.