Display device including an electrode overlapping a frame area outside the display area

1. A display device which displays an image in a display area based on a pixel signal, the display device comprising:

a first substrate;

a second substrate opposed to the first substrate;

a first electrode arranged in the first substrate and overlapping a frame area outside the display area;

a plurality of second electrodes arranged in the second substrate and overlapping the display area;

a plurality of third electrodes arranged in the first substrate and overlapping the display area;

a touch detection driver configured to output a drive signal to the first electrode and the third electrodes, and detect contact or proximity of an object with the frame area based on first electrostatic capacitance between the first electrode and the second electrodes and second electrostatic capacitance between the third electrodes and the second electrodes;

a plurality of first switches connected to the plurality of third electrodes; and

a fourth electrode arranged in the second substrate and overlapping the frame area, wherein

the display area has a rectangular shape,

the second electrodes are configured to extend in a first direction along first sides of the display area and are arranged in a second direction along second sides adjacent to the first sides,

the third electrodes are configured to extend in the second direction and are arranged in the first direction,

the first electrode is configured to extend in the second direction, and two of first electrodes are arranged in the first substrate and face each other across the display area,

a gap between the first electrode and the third electrode located at an end on a first electrode side in an arrangement of the third electrodes is wider than a gap between adjacent third electrodes in the arrangement of the third electrodes,

wires which connect the second electrodes and the touch detection driver are arranged in a location overlapping the gap between the first electrode and the third electrode,

a direct-current voltage is supplied to the plurality of third electrodes via the plurality of first switches when an operation of displaying an image is executed,

the drive signal is output to the first electrode and the plurality of third electrodes when an operation of detecting contact or proximity of the object is executed,

the touch detection driver is configured to detect contact or proximity of the object with the frame area based on electrostatic capacitance between the third electrodes and the fourth electrode,

the fourth electrode is configured to extend in the first direction, and two of fourth electrodes are arranged in the second substrate and face each other across the display area, and

the first electrodes and the fourth electrodes do not overlap the display area.

2. The display device of claim 1 , further comprising a switch configured to switch between a first detection operation and a second detection operation,

the first detection operation of detecting contact or proximity of the object based on mutual electrostatic capacitance between the first electrode and the third electrodes, and the second electrodes,

the second detection operation of detecting contact or proximity of the object based on self electrostatic capacitance of each of the first electrode and the third electrodes.

3. The display device of claim 1 , wherein the drive signal is sequentially supplied to the first electrode and the third electrodes.

4. The display device of claim 1 , wherein the first electrode and the third electrodes are formed of a transparent conductive material.

5. The display device of claim 4 , wherein part of a shield electrode arranged in the first substrate is used as the first electrode.

6. The display device of claim 4 , wherein the first electrode is arranged between a shield electrode arranged in the first substrate and the third electrodes.

7. The display device of claim 1 , wherein part of a shield electrode formed of a metal material and arranged in the second substrate is used as the fourth electrode.

8. The display device of claim 7 , wherein the shield electrode is arranged in a location to shield noises resulting from the drive signal output to the first electrode and the third electrodes.

9. The display device of claim 1 , wherein a plurality of common electrodes for displaying an image in the display area are used as the third electrodes.

10. The display device of claim 9 , wherein a display operation of displaying an image in the display area and a detection operation of detecting contact or proximity of the object are executed in a time sharing manner.

11. The display device of claim 1 , further comprising:

a second switch connected to the first electrode, wherein

a constant potential is supplied to the first electrode via the second switch when the operation of displaying an image is executed.