Display device
View Patent ↗A display device includes a flexible substrate having a display region including a plurality of pixels, each of the plurality of pixels having a pair of electrodes and a display element therebetween; a first electrode layer provided on the plurality of pixels; a second electrode layer provided on the first electrode layer; a third electrode layer provided on the second electrode layer; a piezoelectric material layer provided between the first electrode layer and the second electrode layer; and a flexible material layer provided between the second electrode layer and the third electrode layer.
1. A display device comprising:
a flexible substrate having a display region, the display region including a plurality of pixels, each of the plurality of pixels having a display element;
a sealing layer covering the plurality of pixels;
a first, a second and a third electrode layer on the sealing layer, each of the first, the second and the third electrode layer is located on different layers;
a piezoelectric material layer between the first electrode layer and the second electrode layer; and
a flexible material layer between the second electrode layer and the third electrode layer.
2. The display device according to claim 1 , wherein
the first electrode layer, the second electrode layer and the piezoelectric material layer are configured to include a bending sensor detecting a direction and an amount of bending of the flexible substrate,
the second electrode layer, the third electrode layer and the flexible material layer are configured to include a press sensor detecting a pressure applied to a region overlapping the display region,
an uppermost layer of the first, the second and the third electrode layer includes a plurality of electrodes arrayed in a matrix,
the plurality of electrodes are configured to include a touch sensor detecting a touch of a conductor with the region overlapping the display region.
3. The display device according to claim 1 , wherein
at least one of the first, the second and the third electrode layer includes a transparent conductive layer.
4. The display device according to claim 1 , wherein
at least one of the first, the second and the third electrode layer includes a metal layer having openings with respect to regions overlapping the plurality of pixels.
5. The display device according to claim 2 , wherein
each of the press sensor and the touch sensor overlaps with the display region.
6. The display device according to claim 5 , wherein
the bending sensor overlaps with the display region.
7. The display device according to claim 2 , wherein
the display element displays an image at each of a plurality of frame periods,
each of the bending sensor, the press sensor and the touch sensor is configured to perform driving in a time division manner such that:
the touch sensor is driven in a first period including a first frame period;
the press sensor is driven in a second period including a second frame period; and
the bending sensor is driven in a third period including a third frame period.
8. The display device according to claim 7 , wherein
the first period, the second period and the third period include an overlapping period.