Display device with improved touch detection in peripheral region

1. A display device comprising:

a first substrate;

a plurality of first electrodes disposed in a display region of the first substrate;

a second electrode facing the first electrodes in a direction perpendicular to a surface of the first substrate and configured to form capacitance between the second electrode and the first electrodes;

a third electrode provided in a peripheral region positioned on the outside of the display region and not overlapping the first electrodes in planar view;

a driver configured to supply a drive signal to the third electrode and at least one first electrode out of the first electrodes simultaneously; and

a scanner configured to select the at least one first electrode to be driven out of the first electrodes and the third electrode simultaneously and couple the at least one first electrode to be driven and the third electrode to the driver,

wherein

the display device has a first detection mode for detecting an object to be detected in the display region and a second detection mode for detecting an object to be detected in the peripheral region,

the scanner selects the first electrodes in units of a drive electrode block including a plurality of the first electrodes in the first detection mode and selects the third electrode and the at least one first electrode facing the third electrode in planar view simultaneously in the second detection mode,

the scanner includes a switch configured to couple the first electrodes included in the drive electrode block, and

the scanner operates the switch to select the first electrodes included in the drive electrode block simultaneously in the first detection mode and operates the switch to select the at least one first electrode facing the third electrode out of the first electrodes included in the drive electrode block in the second detection mode.

2. The display device according to claim 1 , wherein the at least one first electrode is disposed closer to the third electrode than the other first electrodes.

3. A display device comprising:

a first substrate;

a plurality of first electrodes disposed in a display region of the first substrate;

a second electrode facing the first electrodes in a direction perpendicular to a surface of the first substrate and configured to form capacitance between the second electrode and the first electrodes;

a third electrode provided in a peripheral region positioned on the outside of the display region and not overlapping the first electrodes in planar view;

a driver configured to supply a drive signal to the third electrode and at least one first electrode out of the first electrodes simultaneously; and

a scanner configured to select the at least one first electrode to be driven out of the first electrodes and the third electrode simultaneously and couple the at least one first electrode to be driven and the third electrode to the driver,

wherein

the display device has a first detection mode for detecting an object to be detected in the display region and a second detection mode for detecting an object to be detected in the peripheral region,

the scanner selects the first electrodes in units of a drive electrode block including a plurality of the first electrodes in the first detection mode and selects the third electrode and the at least one first electrode facing the third electrode in planar view simultaneously in the second detection mode,

the scanner includes a shift register,

the shift register sequentially supplies a scanning signal to the drive electrode block and the third electrode,

a plurality of the shift registers are provided corresponding to the drive electrode block and the third electrode, and

the shift register provided corresponding to the third electrode supplies the same scanning signal to the third electrode and the at least one first electrode to be driven.

4. The display device according to claim 1 , wherein the second electrode outputs, to a detector, a sensor output signal corresponding to a change in capacitance between the second electrode and the first electrodes and a change in capacitance between the second electrode and the third electrode.

5. The display device according to claim 1 , wherein

the first electrodes are arrayed in a first direction and extending in a second direction intersecting the first direction in planar view, and

a plurality of third electrodes are provided facing in the first direction, and the first electrodes are disposed between the third electrodes facing in the first direction.

6. The display device according to claim 5 , wherein

a plurality of the second electrodes extend in the first direction and are arrayed in the second direction in planar view, and

the third electrodes are disposed facing an end of the second electrode.

7. The display device according to claim 1 , wherein the third electrode is disposed to a layer different from layers of the first electrodes and the second electrode.

8. The display device according to claim 1 , further comprising:

a cover substrate facing the first substrate in the direction perpendicular to the surface of the first substrate, wherein

the third electrode is provided in the peripheral region of the cover substrate.

9. The display device according to claim 1 , wherein a plurality of the third electrodes are provided surrounding the first electrodes in areas along four sides of the peripheral region in planar view.

10. The display device according to claim 1 , further comprising:

a plurality of pixel electrodes disposed in a matrix in the display region of the first substrate; and

a display functional layer configured to implement an image display function.

11. The display device according to claim 10 , wherein the driver supplies a display drive signal to the first electrodes in a display period for displaying an image.

12. The display device according to claim 1 , further comprising:

a second substrate facing the first substrate, wherein

the second electrode is provided to the second substrate.

13. The display device according to claim 3 , wherein the at least one first electrode is disposed closer to the third electrode than the other first electrodes.

14. The display device according to claim 3 , wherein the second electrode outputs, to a detector, a sensor output signal corresponding to a change in capacitance between the second electrode and the first electrodes and a change in capacitance between the second electrode and the third electrode.

15. The display device according to claim 3 , wherein

the first electrodes are arrayed in a first direction and extending in a second direction intersecting the first direction in planar view, and

a plurality of third electrodes are provided facing in the first direction, and the first electrodes are disposed between the third electrodes facing in the first direction.

16. The display device according to claim 15 , wherein

a plurality of the second electrodes extend in the first direction and are arrayed in the second direction in planar view, and

the third electrodes are disposed facing an end of the second electrode.

17. The display device according to claim 3 , wherein the third electrode is disposed to a layer different from layers of the first electrodes and the second electrode.

18. The display device according to claim 3 , further comprising:

a cover substrate facing the first substrate in the direction perpendicular to the surface of the first substrate, wherein

the third electrode is provided in the peripheral region of the cover substrate.

19. The display device according to claim 3 , wherein a plurality of the third electrodes are provided surrounding the first electrodes in areas along four sides of the peripheral region in planar view.

20. The display device according to claim 3 further comprising:

a second substrate facing the first substrate,

wherein the second electrode is provided to the second substrate.