Display device with wires overlapping electrodes
A display device includes a substrate, first electrodes, second electrodes, and a driver. The first electrodes are disposed in a matrix (row-column configuration) in a display region of the substrate. The second electrodes are disposed in a peripheral region on the outside of the display region of the substrate. The driver supplies a drive signal to the first electrodes and the second electrodes. The first electrodes output detection signals corresponding to self-capacitance changes in the first electrodes. The second electrodes output detection signals corresponding to self-capacitance changes in the second electrodes.
1. A display device comprising:
a substrate;
a plurality of electrodes disposed in a matrix of a first direction and a second direction crossing the first direction, in a display region of the substrate, the electrodes including a first electrode, a second electrode, and a third electrode;
a driver configured to supply a drive signal to the electrodes; and
a plurality of wires extending in the second direction and coupling the respective electrodes to the driver,
wherein
the wires include a first wire, a second wire, a third wire, and inner wires that are arranged from a first outermost side to an inner side in the first direction,
the first wire is disposed outermost among all the wires in the first direction, at the first outermost side,
the first wire and the second wire are directly adjacent to each other,
the second wire and the third wire are directly adjacent to each other,
the first wire is coupled to the first electrode and overlaps the first electrode and the third electrode without overlapping the second electrode,
the second wire is coupled to the second electrode aligned with the first electrode along the second direction and overlaps the first electrode, and
the third wire is coupled to the third electrode aligned with the first electrode along the second direction without overlapping the first electrode.
2. The display device according to claim 1 , wherein
an insulating layer is provided between the electrodes and the wires, and
each of the electrodes is coupled to the wires via contact holes disposed in the insulating layer.
3. The display device according to claim 2 , wherein
each of the contact holes is disposed in a position overlapping a corresponding electrode in a plan view.
4. The display device according to claim 1 , wherein
the first electrode coupled to the first wire, the second electrode coupled to the second wire, and the third electrode coupled to the third wire, are arranged in the second direction, in an outermost row in the first direction in the display region.
5. The display device according to claim 4 , wherein
the first wire overlaps 0the third electrode which has a smaller area than an area of the first electrode, without overlapping the second electrode.
6. The display device according to claim 5 , wherein
a corner of the display region has an arc or round shape, and
the second electrode or the third electrode having the smaller area than the area of the first electrode has an arc shape along the arc shape of the corner.
7. The display device according to claim 1 , wherein
another electrode is provided between the first electrode and the second electrode.
8. The display device according to claim 1 , wherein
another electrode is provided between the first electrode and the third electrode.
9. The display device according to claim 2 , wherein
at least one of the first wire, the second wire, the third wire is coupled to the electrode via the contact hole at an intermediate portion.
10. The display device according to claim 1 , wherein
at least one of the first wire, the second wire, and the third wire extends from one end to the other end of the display region.
11. The display device according to claim 1 , wherein
the plurality of electrodes constitutes a plurality of electrode blocks each having the electrodes of a same column in the display region,
the plurality of electrode blocks include:
a first block disposed at one end side in an outermost in the first direction in the display region and including the first electrode coupled to the first wire, the second electrode coupled to the second wire, and the third electrode coupled to the third wire; and
a second block disposed at the other end side in the outermost in the first direction in the display region, and
an arrangement of the wires and the contact holes in the second block is line symmetry with an arrangement of the wires and the contact holes in the first block, relative to a central line dividing the display region in half in the first direction.
12. The display device according to claim 1 , wherein
the plurality of electrodes constitutes a plurality of electrode blocks each including the electrodes of a same column in the display region,
the plurality of electrode blocks include:
a first block including the first electrode coupled to the first wire, the second electrode coupled to the second wire, and the third electrode coupled to the third wire; and
a second block disposed adjacent to the first electrode bock in the first direction, and
an arrangement of the wires and the contact holes in the second block is line symmetry with an arrangement of the wires and the contact holes in the first block, relative to a virtual line extending between the first block and the second block, along the second direction.
13. The display device according to claim 1 , wherein
each of the electrodes overlaps a plurality of pixel electrodes in the display region.
14. The display device according to claim 13 , wherein
in a display period, the pixel electrodes are supplied with a pixel signal, and the driver supplies a drive signal for displaying to the electrodes, and
in a touch detection period, the pixel electrodes retain the pixel signal, and the driver supplies the drive signal for a touch detection to at least one of the electrodes through at least one of the wires.
15. The display device according to claim 1 , wherein
the electrodes further include a fourth electrode, a fifth electrode, and a sixth electrode along the second outer most side,
the wires further include a fourth wire, a fifth wire, and a sixth wire that are arranged from the second outermost side that is opposite to the first outermost side to the inner side in the first direction,
the fourth wire is disposed outermost among all the wires in the first direction, at the second outermost side,
the fourth wire is coupled to the fourth electrode and overlaps the fourth electrode and the sixth electrode without overlapping the fifth electrode,
the fifth wire is coupled to the fifth electrode aligned with the fourth electrode along the second direction and overlaps the fourth electrode, and
the sixth wire is coupled to the sixth electrode aligned with the fourth electrode along the second direction without overlapping the fourth electrode.