Touch sensor and touch screen

Patent metadata

Field	Value
Publication number	US-10444902-B2
Application number	US-201715668879-A
Country	US
Kind code	B2
Filing date	Aug 4, 2017
Priority date	Aug 31, 2016
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A touch sensor includes first electrodes which are driving electrodes of the touch sensor, second electrodes which are detecting electrodes of the touch sensor, third electrodes, and an insulating film which is stacked on the first electrodes. Each of the first electrodes extends in a first direction. Each of the second electrodes and each of the third electrodes are formed on the insulating film, and extend in a second direction. The second electrodes overlap with partial regions of the first electrodes, and the third electrodes overlap with other partial regions of the first electrodes and are formed in gaps between the second electrodes. A film thickness of the insulating film between the first electrodes and the third electrodes varies due to pressing force in a film thickness direction, and the insulating film constitutes the electrostatic capacitance-type pressure sensor with first electrodes and the third electrodes.

First claim

What is claimed is:

1. A touch sensor comprising:
first electrodes that are a plurality of driving electrodes of an electrostatic capacitance-type touch sensor, each extend in a first direction, and are arranged in a second direction intersecting the first direction;
an insulating film that is stacked on the first electrodes;
second electrodes that are a plurality of detecting electrodes of the touch sensor, are formed on the insulating film, overlap with partial regions of the first electrodes, each extend in the second direction, and are arranged in the first direction; and
third electrodes that are a plurality of electrodes formed in gaps between the second electrodes, overlapping with other partial regions of the first electrodes, each extend in the second direction, and are arranged in the first direction, on the insulating film,
wherein a film thickness of the insulating film between the first electrodes and the third electrodes varies due to pressing force in a film thickness direction, and the insulating film constitutes an electrostatic capacitance-type pressure sensor with the first electrodes and the third electrodes,
wherein one of the first electrodes includes a first pad portion and a first bridge wiring portion having a width shorter than a length of one side of the first pad portion,
wherein one of the third electrodes includes a third pad portion, and
wherein the third pad portion overlaps with the first pad portion without protruding from the first pad portion in a plan view.

2. The touch sensor according to claim 1 ,
wherein the insulating film includes an elastic material.

3. The touch sensor according to claim 1 ,
wherein the insulating film is continuously provided throughout regions overlapping with the second electrodes and regions overlapping with the third electrodes.

4. The touch sensor according to claim 1 ,
wherein one of the second electrodes includes a second pad portion and a second bridge wiring portion having a width shorter than a length of one side of the second pad portion,
wherein one of the third electrodes includes another third pad portion and a third bridge wiring portion having a width shorter than a length of one side of the third pad portion, and
wherein the third bridge wiring portion connecting the third pad portion and the another third pad portion.

5. The touch sensor according to claim 4 ,
wherein the second pad portion overlaps with the first pad portion without protruding from the first pad portion in a plan view.

6. The touch sensor according to claim 4 ,
wherein the third pad portion is located without overlapping with the second pad portion in the plan view.

7. The touch sensor according to claim 1 ,
wherein the number of the second electrodes is greater than the number of the third electrodes.

8. The touch sensor according to claim 1 ,
wherein the third pad portion is located without overlapping with the first bridge portion in the plan view.

9. A touch screen comprising:
a plurality of pixels that are formed on a substrate and each include a light emitting element;
a sealing layer that is provided to cover the plurality of pixels;
first electrodes that are a plurality of driving electrodes of an electrostatic capacitance-type touch sensor, are formed on the sealing layer, each extend in a first direction, and are arranged in a second direction intersecting the first direction;
an insulating film that is stacked on the first electrodes;
second electrodes that are a plurality of detecting electrodes of the touch sensor, are formed on the insulating film, overlap with partial regions of the first electrodes, each extend in the second direction, and are arranged in the first direction; and
third electrodes that are a plurality of electrodes formed in gaps between the second electrodes overlapping with other partial regions of the first electrodes, each extend in the second direction, and are arranged in the first direction, on the insulating film,
wherein a film thickness of the insulating film between the first electrodes and the third electrodes varies due to pressing force in a film thickness direction, and the insulating film constitutes an electrostatic capacitance-type pressure sensor with the first electrodes and the third electrodes,
wherein one of the first electrodes includes a first pad portion and a first bridge wiring portion having a width shorter than a length of one side of the first pad portion,
wherein one of the third electrodes includes a third pad portion, and
wherein the third pad portion overlaps with the first pad portion without protruding from the first pad portion in a plan view.

10. The touch screen according to claim 9 ,
wherein the insulating film includes an elastic material.

11. The touch screen according to claim 9 ,
wherein the insulating film is continuously provided throughout regions overlapping with the second electrodes and regions overlapping with the third electrodes.

12. The touch screen according to claim 9 , further comprising:
a display region that is provided with the plurality of pixels, and
wherein the second electrodes and the third electrodes are provided apart from each other within the display region.

13. The touch screen according to claim 9 ,
wherein one of the second electrodes includes a second pad portion and a second bridge wiring portion having a width shorter than a length of one side of the second pad portion,
wherein one of the third electrodes includes another third pad portion and a third bridge wiring portion having a width shorter than a length of one side of the third pad portion, and
wherein the third bridge wiring portion connecting the third pad portion and the another third pad portion.

14. The touch screen according to claim 13 ,
wherein an area of the first pad portion is four times or more an area of the second pad portion.

15. The touch screen according to claim 14 ,
wherein the area of the first pad portion is four times or more an area of the third pad portion.

16. The touch sensor according to claim 13 ,
wherein the third pad portion is located without overlapping with the second pad portion in the plan view.

17. The touch screen according to claim 9 ,
wherein the number of the second electrodes is greater than the number of the third electrodes.

18. The touch sensor according to claim 9 ,
wherein the third pad portion is located without overlapping with the first bridge portion in the plan view.

Assignees

• Japan Display Inc

Inventors

• Ma Chunche

Classifications

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title