Touch sensor and display device with touch sensor

Patent metadata

Field	Value
Publication number	US-10359899-B2
Application number	US-201816161799-A
Country	US
Kind code	B2
Filing date	Oct 16, 2018
Priority date	Sep 27, 2016
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

First electrodes are formed on an insulation surface in such a manner that the adjacent first electrodes are connected in a first direction and are separated in a second direction intersecting the first direction. Second electrodes are formed on an insulation surface in such a manner that the adjacent second electrodes are connected in the second direction and are separated in the first direction. Third electrodes are formed in regions in which the third electrodes overlap with the first electrodes and do not overlap with the second electrodes in such a manner that the adjacent third electrodes are connected in the second direction and are separated in the first direction. A flexible insulation layer is formed between the first electrodes and the third electrodes. An area of each of the third electrodes is less than an area of each of the first electrodes.

First claim

What is claimed is:

1. A display device with a touch sensor, comprising:
a substrate including a display region with a plurality of pixels;
a first insulation layer on the plurality of pixels;
a plurality of first electrodes on the first insulation layer;
a plurality of second electrodes on the first insulation layer;
a second insulation layer on the plurality of first electrodes and the plurality of second electrodes; and
a plurality of third electrodes on the second insulation layer;
wherein
an adjacent pair of the plurality of first electrodes are connected with a first connection portion in a first direction,
an adjacent pair of the plurality of second electrodes are connected with a second connection portion in a second direction,
an adjacent pair of the plurality of third electrodes are connected with a third connection portion in the second direction, and
the first connection portion and the second connection portion intersect each other.

2. The display device with the touch sensor according to claim 1 , wherein
light passes through the first insulation layer and the second insulation layer to display an image.

3. The display device with the touch sensor according to claim 1 , wherein
each of the plurality of first electrodes and a corresponding one of the plurality of third electrodes are overlapped in a plan view.

4. The display device with the touch sensor according to claim 1 , wherein
a side of each of the plurality of second electrodes and a side of a corresponding one of the plurality of third electrodes are opposed to each other side by side without overlapping of the plurality of second electrodes and the plurality of third electrodes in a plan view.

5. The display device with the touch sensor according to claim 1 , wherein
the second insulation layer is flexible.

6. The display device with the touch sensor according to claim 4 , wherein
the second insulation layer includes transparent soft material.

7. The display device with the touch sensor according to claim 1 , wherein
the second insulation layer continuously includes a plurality of first regions overlapping with the plurality of first electrodes and a plurality of second regions overlapping with the plurality of second electrodes.

8. The display device with the touch sensor according to claim 1 , wherein
the second insulation layer is formed to be separated into a plurality of first regions overlapping with the plurality of first electrodes and a second region different from the plurality first regions.

9. The display device with the touch sensor according to claim 1 , wherein
presence or absence of a touch and coordinates of the touch are determined by detecting a change in electrostatic capacitance between the plurality of first electrodes and the plurality of second electrodes, and a pressing pressure of a touch is determined by detecting a change in electrostatic capacitance between the plurality of first electrodes and the plurality of third electrodes by displacement in a film thickness direction of the second insulation layer.

10. A touch sensor comprising:
a plurality of first electrodes;
a plurality of second electrodes;
a plurality of third electrodes; and
an insulation layer;
wherein
an adjacent pair of the plurality of first electrodes are connected with a first connection portion in a first direction,
an adjacent pair of the plurality of second electrodes are connected with a second connection portion in a second direction,
an adjacent pair of the plurality of third electrodes are connected with a third connection portion in the second direction,
the insulation layer is between the plurality of first electrodes and the plurality of third electrodes,
the insulation layer is between the plurality of second electrodes and the plurality of the third electrodes, and
the first connection portion and the second connection portion intersect each other.

11. The touch sensor according to claim 10 , wherein
the insulation layer is directly on a surface of the plurality of first electrodes.

12. The touch sensor according to claim 11 , wherein
the insulation layer is directly on a surface of the plurality of second electrodes.

13. The touch sensor according to claim 10 , wherein
each of the plurality of first electrodes and a corresponding one of the plurality of third electrodes are overlapped in a plan view.

14. The touch sensor according to claim 10 , wherein
a side of each of the plurality of second electrodes and a side of a corresponding one of the plurality of third electrodes are opposed to each other side by side without overlapping of the plurality of second electrodes and the plurality of third electrodes in a plan view.

15. The touch sensor according to claim 10 , wherein
the insulation layer is flexible.

16. The touch sensor according to claim 15 , wherein
the insulation layer includes soft material.

17. The touch sensor according to claim 10 , wherein
the insulation layer continuously includes a plurality of first regions overlapping with the plurality of first electrodes and a plurality of second regions overlapping with the plurality of second electrodes.

18. The touch sensor according to claim 10 , wherein
the insulation layer is formed to be separated into a plurality of first regions overlapping with the plurality of first electrodes and a second region different from the plurality first regions.

19. The touch sensor according to claim 10 , wherein
presence or absence of a touch and coordinates of the touch are determined by detecting a change in electrostatic capacitance between the plurality of first electrodes and the plurality of second electrodes, and a pressing pressure of a touch is determined by detecting a change in electrostatic capacitance between the plurality of first electrodes and the plurality of third electrodes by displacement in a film thickness direction of the insulation layer.

Assignees

• Japan Display Inc

Inventors

• Naganuma Tomohiko
• Miyamoto Mitsuhide
• Ma Chunche

Classifications

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0418

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/0414

  using force sensing means to determine a position · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title