Display device
A display device includes a first substrate, a second substrate, a first electrode, a second electrode, a drive circuit, and a control circuit. The second substrate faces the first substrate. The first electrode is provided in a display region of the first substrate. The second electrode is provided to the second substrate at a position closer to a display surface than the first electrode in a direction perpendicular to the first substrate. The drive circuit supplies a first drive signal or a second drive signal to the second electrode. The control circuit has a first detection mode and a second detection mode.
1. A display device comprising:
a first substrate;
a second substrate facing the first substrate;
a first electrode provided in a display region of the first substrate;
a second electrode provided to the second substrate at a position closer to a display surface than the first electrode in a direction perpendicular to the first substrate;
a drive circuit configured to supply a first drive signal or a second drive signal to the second electrode;
a plurality of the first electrodes and a plurality of the second electrodes;
a plurality of coupling wires coupled to the respective second electrodes;
a coupling circuit coupled to the second electrodes via the coupling wires,
a plurality of third electrodes disposed on the first substrate with a space interposed between the first electrodes and the third electrodes in planar view and
a control circuit having a first detection mode for detecting an object to be detected in contact with the display surface based on a first detection signal corresponding to a change in mutual capacitance between the first electrode and the second electrode when the first drive signal is supplied to the second electrode, and a second detection mode for detecting the object to be detected not in contact with the display surface based on a second detection signal corresponding to a change in self-capacitance in the second electrode when the second drive signal is supplied to the second electrode,
wherein
the first electrode and the second electrode do not overlap in planar view
the first electrodes are arrayed in a first direction in planar view and each extend in a second direction intersecting the first direction,
the second electrodes are arrayed in the first direction and the second direction,
the coupling circuit is configured to switch a coupling state of the second electrodes between the first detection mode and the second detection mode,
the coupling circuit electrically couples the second electrodes arrayed in the first direction to form a drive electrode block in the first detection mode,
the drive circuit supplies the first drive signal to the drive electrode block,
the coupling circuit electrically couples the second electrodes arrayed in the second direction to form a detection electrode block in the second detection mode and
the drive circuit supplies the second drive signal to the detection electrode block,
the drive circuit supplies a display drive signal serving as a common potential for a plurality of pixels to the first electrodes and the third electrodes in a display mode for displaying an image on the display surface, and
the first electrodes are provided to the same layer as a layer of the third electrodes.
2. The display device according to claim 1 , wherein
the second electrode includes a plurality of rectangular first portions arrayed in the first direction and a second portion coupling the first portions disposed side by side in the first direction,
the second portion is disposed intersecting the first electrode in planar view,
the length of the second portion in the second direction is shorter than the length of the first portion in the second direction, and
the first portion and the second portion include a plurality of mesh-shaped, zigzag-line-shaped, or wavy-line-shaped metal wires.
3. The display device according to claim 1 , wherein the coupling wires are provided between the second electrodes facing in the first direction and extend in the second direction overlapping the third electrodes in planar view.
4. The display device according to claim 2 , wherein the first portions are disposed overlapping the respective third electrodes arrayed in the first direction in planar view.
5. The display device according to claim 2 , wherein
the second electrode further includes a third portion disposed at an end in the first direction, and
the length of the third portion in the first direction is shorter than the length of the first portion in the first direction.
6. The display device according to claim 5 , wherein two of the third portions facing in the first direction are disposed overlapping the third electrode in planar view.
7. The display device according to claim 1 , wherein the coupling circuit is provided in a peripheral region on the outside of the display region of the first substrate.
8. The display device according to claim 1 , wherein the coupling circuit is provided in a peripheral region on the outside of the display region of the second substrate.
9. A display device comprising:
a first substrate;
a second substrate facing the first substrate;
a first electrode provided in a display region of the first substrate;
a second electrode provided to the second substrate at a position closer to a display surface than the first electrode in a direction perpendicular to the first substrate;
a drive circuit configured to supply a first drive signal or a second drive signal to the second electrode;
a plurality of the first electrodes and a plurality of the second electrodes;
a plurality of coupling wires coupled to the respective second electrodes;
a coupling circuit coupled to the second electrodes via the coupling wires,
a plurality of third electrodes disposed on the first substrate with a space interposed between the first electrodes and the third electrodes in planar view, and
a control circuit having a first detection mode for detecting an object to be detected in contact with the display surface based on a first detection signal corresponding to a change in mutual capacitance between the first electrode and the second electrode when the first drive signal is supplied to the second electrode, and a second detection mode for detecting the object to be detected not in contact with the display surface based on a second detection signal corresponding to a change in self-capacitance in the second electrode when the second drive signal is supplied to the second electrode,
wherein
the first electrode and the second electrode do not overlap in planar view,
the first electrodes are arrayed in a first direction in planar view and each extend in a second direction intersecting the first direction,
the second electrodes are arrayed in the first direction and the second direction,
the coupling circuit is configured to switch a coupling state of the second electrodes between the first detection mode and the second detection mode,
the coupling circuit electrically couples the second electrodes arrayed in the first direction to form a drive electrode block in the first detection mode,
the drive circuit supplies the first drive signal to the drive electrode block,
the coupling circuit electrically couples the second electrodes arrayed in the second direction to form a detection electrode block in the second detection mode
the drive circuit supplies the second drive signal to the detection electrode block,
the drive circuit supplies a display drive signal serving as a common potential for a plurality of pixels to the first electrodes and the third electrodes in a display mode for displaying an image on the display surface, and
the drive circuit supplies a guard signal synchronized with the second drive signal and having the same electric potential as an electric potential of the second drive signal to at least one of the first electrodes or the third electrodes in the second detection mode.
10. The display device according to claim 9 , wherein
the second electrode includes a plurality of rectangular first portions arrayed in the first direction and a second portion coupling the first portions disposed side by side in the first direction,
the second portion is disposed intersecting the first electrode in planar view,
the length of the second portion in the second direction is shorter than the length of the first portion in the second direction, and
the first portion and the second portion include a plurality of mesh-shaped, zigzag-line-shaped, or wavy-line-shaped metal wires.
11. The display device according to claim 9 , wherein the coupling wires are provided between the second electrodes facing in the first direction and extend in the second direction overlapping the third electrodes in planar view.
12. The display device according to claim 10 , wherein the first portions are disposed overlapping the respective third electrodes arrayed in the first direction in planar view.
13. The display device according to claim 10 ,
wherein
the second electrode further includes a third portion disposed at an end in the first direction, and
the length of the third portion in the first direction is shorter than the length of the first portion in the first direction.
14. The display device according to claim 13 , wherein two of the third portions facing in the first direction are disposed overlapping the third electrode in planar view.
15. A display device comprising:
a first substrate;
a second substrate facing the first substrate;
a first electrode provided in a display region of the first substrate;
a second electrode provided to the second substrate at a position closer to a display surface than the first electrode in a direction perpendicular to the first substrate;
a drive circuit configured to supply a first drive signal or a second drive signal to the second electrode;
a plurality of the first electrodes and a plurality of the second electrodes;
a plurality of coupling wires coupled to the respective second electrodes;
a coupling circuit coupled to the second electrodes via the coupling wires,
a plurality of third electrodes disposed on the first substrate with a space interposed between the first electrodes and the third electrodes in planar view, and
a control circuit having a first detection mode for detecting an object to be detected in contact with the display surface based on a first detection signal corresponding to a change in mutual capacitance between the first electrode and the second electrode when the first drive signal is supplied to the second electrode, and a second detection mode for detecting the object to be detected not in contact with the display surface based on a second detection signal corresponding to a change in self-capacitance in the second electrode when the second drive signal is supplied to the second electrode,
wherein
the first electrode and the second electrode do not overlap in planar view,
the first electrodes are arrayed in a first direction in planar view and each extend in a second direction intersecting the first direction,
the second electrodes are arrayed in the first direction and the second direction,
the coupling circuit is configured to switch a coupling state of the second electrodes between the first detection mode and the second detection mode
the coupling circuit electrically couples the second electrodes arrayed in the first direction to form a drive electrode block in the first detection mode
the drive circuit supplies the first drive signal to the drive electrode block,
the coupling circuit electrically couples the second electrodes arrayed in the second direction to form a detection electrode block in the second detection mode and
the drive circuit supplies the second drive signal to the detection electrode
the drive circuit supplies a display drive signal serving as a common potential for a plurality of pixels to the first electrodes and the third electrodes in a display mode for displaying an image on the display surface,
a signal line configured to supply a pixel signal to the pixels is provided to the first substrate, and
the first electrode is disposed overlapping the signal line in planar view and extends in a direction parallel to the signal line.
16. The display device according to claim 15 ,
the second electrode includes a plurality of rectangular first portions arrayed in the first direction and a second portion coupling the first portions disposed side by side in the first direction,
the second portion is disposed intersecting the first electrode in planar view, the length of the second portion in the second direction is shorter than the length of the first portion in the second direction, and
the first portion and the second portion include a plurality of mesh-shaped, zigzag-line-shaped, or wavy-line-shaped metal wires.
17. The display device according to claim 15 , wherein the coupling wires are provided between the second electrodes facing in the first direction and extend in the second direction overlapping the third electrodes in planar view.
18. The display device according to claim 16 , wherein the first portions are disposed overlapping the respective third electrodes arrayed in the first direction in planar view.
19. The display device according to claim 16 ,
wherein
the second electrode further includes a third portion disposed at an end in the first direction, and
the length of the third portion in the first direction is shorter than the length of the first portion in the first direction.
20. The display device according to claim 19 , wherein two of the third portions facing in the first direction are disposed overlapping the third electrode in planar view.