Touch detection device, display device with touch detecting function, and electronic apparatus
According to an aspect, a touch detection device includes a drive electrode layer including a plurality of drive electrodes formed in stripes in an array direction; a plurality of touch detection electrodes that are arranged in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes; and a touch detecting unit that applies a touch drive signal to the plurality of drive electrodes and detects a position of an object in contiguity with a touch detection area based on detection signals supplied from the plurality of touch detection electrodes. The plurality of the drive electrodes include an end drive electrode that is provided to at least one end in the array direction and has a larger width in the array direction than the width in the array direction of drive electrodes other than the end drive electrode.
1. A display apparatus with a touch detecting function having a touch detection device and a display device arranged in a manner overlapping with the touch detection device, the display apparatus comprising:
an array substrate;
an opposed substrate opposed to the array substrate;
a display functional layer disposed between the array substrate and the opposed substrate;
a chip;
a first wire electrically connected to the chip;
a second wire extending in a direction different from the first wire;
a drive electrode layer that is disposed on the array substrate and includes a plurality of drive electrodes formed in stripes and arranged in an array direction, the drive electrodes including
a first drive electrode that has a first width in the array direction, the first drive electrode being electrically coupled to corresponding second wires at both ends of the first drive electrode, and
a second drive electrode having a second width in the array direction, the first width being greater than the second width, the second drive electrode being electrically coupled to corresponding second wires at both ends of the second drive electrode;
a plurality of pixel electrodes disposed on the plurality of drive electrodes via an insulation layer;
a plurality of touch detection electrodes that are arranged on an observer side of the opposed substrate in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes;
a touch detecting unit configured to detect a position of an object in contiguity with a touch detection area based on detection signals supplied from the plurality of touch detection electrodes,
wherein the first drive electrode is farther from the chip than the second drive electrode,
wherein the second width is an integral multiple of a pixel pitch that is an arrangement interval between the plurality of pixel electrodes in a display area, and
wherein a difference between the first width and the second width is an even integral multiple of the pixel pitch.
2. The display apparatus with a touch detecting function according to claim 1 , wherein
the display device comprises:
a control unit that applies a common voltage between the plurality of pixel electrodes and the plurality of drive electrodes based on an image signal and performs image display control such that the display functional layer performs an image display function.
3. The display apparatus with a touch detecting function according to claim 1 , wherein the touch detection device is configured to detect the position using the detection signals supplied from at least two adjacent touch detection electrodes.
4. The display apparatus with a touch detecting function according to claim 1 , wherein
a boundary between the drive electrodes in the array direction overlaps a boundary between the pixel electrodes in the array direction.
5. The display apparatus with a touch detecting function according to claim 1 , wherein, the plurality of drive electrodes in the drive electrode layer are arranged symmetrically with respect to a center in the array direction.
6. The display apparatus with a touch detecting function according to claim 1 , wherein the display device performs line-sequential scan on each of horizontal lines in a display operation, and
a boundary between the drive electrodes in the array direction overlaps a boundary between horizontal lines.
7. The display apparatus with a touch detecting function according to claim 1 , wherein the first drive electrode, which has the first width greater than the second width and overlaps a frame area in which no pixel electrodes are disposed, has fringe electric field of intensity higher than intensity of the second drive electrode, the second drive electrode having the second width and being disposed in the display area in which pixel electrodes are disposed.
8. An electronic apparatus having a display apparatus with a touch detecting function that has a touch detection device and a display device arranged in a manner overlapping with the touch detection device, the display apparatus comprising:
an array substrate;
an opposed substrate opposed to the array substrate;
a display functional layer disposed between the array substrate and the opposed substrate;
a chip;
a first wire electrically connected to the chip;
a second wire extending in a direction different from the first wire;
a drive electrode layer that is disposed on the array substrate and includes a plurality of drive electrodes formed in stripes and arranged in an array direction, the drive electrodes including
a first drive electrode that has a first width in the array direction, the first drive electrode being electrically coupled to corresponding second wires at both ends of the first drive electrode, and
a second drive electrode having a second width in the array direction, the first width being greater than the second width, the second drive electrode being electrically coupled to corresponding second wires at both ends of the second drive electrode;
a plurality of pixel electrodes disposed on the plurality of drive electrodes via an insulation layer;
a plurality of touch detection electrodes that are arranged on an observer side of the opposed substrate in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes; and
a touch detecting unit configured to detect a position of an object in contiguity with a touch detection area based on detection signals supplied from the plurality of touch detection electrodes,
wherein the first drive electrode is farther from the chip than the second drive electrode,
wherein the second width is an integral multiple of a pixel pitch that is an arrangement interval between the plurality of pixel electrodes in a display area, and
wherein a difference between the first width and the second width is an even integral multiple of the pixel pitch.
9. The electronic apparatus according to claim 8 , wherein, the plurality of drive electrodes in the drive electrode layer are arranged symmetrically with respect to a center in the array direction.