Touch or proximity sensor and display device

Patent metadata

Field	Value
Publication number	US-2018136769-A1
Application number	US-201715810432-A
Country	US
Kind code	A1
Filing date	Nov 13, 2017
Priority date	Nov 17, 2016
Publication date	May 17, 2018
Grant date	—

Abstract

There is provided a touch or proximity sensor including a plurality of first touch electrodes extending in a first direction and being arranged in a second direction intersecting the first direction, and a plurality of second touch electrodes extending in the second direction, being arranged in the first direction, and insulated from the plurality of first touch electrodes, in which at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes respectively have concave surface on a detection surface side.

First claim

What is claimed is:

1 . A touch or proximity sensor comprising:
a plurality of first touch electrodes extending in a first direction and being arranged in a second direction intersecting the first direction; and a plurality of second touch electrodes extending in the second direction, being arranged in the first direction, and insulated from the plurality of first touch electrodes, wherein at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes respectively have concave surface on a detection surface side.

2 . The touch or proximity sensor according to claim 1 , further comprising:
a first insulating film provided on the plurality of first touch electrodes, wherein the plurality of second touch electrodes are provided on the first insulating film.

3 . The touch or proximity sensor according to claim 2 , further comprising:
a second insulating film provided in a layer above the plurality of second touch electrodes, wherein a refractive index of the second insulating film is substantially equal to a refractive index of the first insulating film.

4 . The touch or proximity sensor according to claim 1 , wherein
each of the plurality of first touch electrodes includes a plurality of first sensor electrodes provided on an insulating surface, arranged in the first direction, and electrically connected to one another, each of the plurality of second touch electrodes includes a plurality of second sensor electrodes provided on the insulating surface, arranged in the second direction, and electrically connected to one another, and at least one of the plurality of first sensor electrodes has a concave surface on the detection surface side, and at least one of the plurality of second sensor electrodes has a concave surface on the detection surface side.

5 . The touch or proximity sensor according to claim 4 , further comprising:
a second insulating film provided in a layer above the plurality of first sensor electrodes and the plurality of second sensor electrodes, wherein the plurality of first sensor electrodes and the plurality of second sensor electrodes are provided on the first insulating film, and a refractive index of the second insulating film is substantially equal to a refractive index of the first insulating film.

6 . The touch or proximity sensor according to claim 1 , further comprising:
a first insulating film having a plurality of concave portions arranged in a matrix shape in a first direction and a second direction intersecting the first direction, wherein each of the plurality of first touch electrodes includes a plurality of first sensor electrodes arranged on the first insulating film, arranged in the first direction, and electrically connected to one another, each of the plurality of second touch electrodes includes a plurality of second sensor electrodes arranged on the first insulating film, arranged in the second direction, and electrically connected to one another, and at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes respectively have concave surfaces according to the concave portions of the first insulating film.

7 . The touch or proximity sensor according to claim 6 , further comprising:
a second insulating film provided in a layer above the plurality of first touch electrodes and the plurality of second touch electrodes, wherein a refractive index of the second insulating film is substantially equal to a refractive index of the first insulating film.

8 . A display device comprising:
a plurality of pixels arranged in a matrix shape; a plurality of first touch electrodes on the plurality of pixels, the plurality of first touch electrodes extending in a first direction and being arranged in a second direction intersecting the first direction; and a plurality of second touch electrodes on the plurality of pixels, the plurality of second touch electrodes extending in the second direction, being arranged in the first direction, and insulated from the plurality of first touch electrodes, wherein at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes respectively have concave surface on a display surface side.

9 . The display device according to claim 8 , further comprising:
a sealing film which covers the plurality of pixels; and a first insulating film provided on the plurality of first touch electrodes, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are provided in a layer above the sealing film, and the plurality of second touch electrodes are provided on the first insulating film.

10 . The display device according to claim 9 , further comprising:
a second insulating film provided in a layer above the plurality of first touch electrodes and the plurality of second touch electrodes, wherein a refractive index of the second insulating film is substantially equal to a refractive index of the first insulating film.

11 . The display device according to claim 8 , further comprising:
a sealing film which covers the plurality of pixels, wherein each of the plurality of first touch electrodes includes a plurality of first sensor electrodes provided on an insulating surface, arranged in the first direction, and electrically connected to one another, each of the plurality of second touch electrodes includes a plurality of second sensor electrodes provided on the insulating surface, arranged in the second direction, and electrically connected to one another, and at least one of the plurality of first sensor electrodes has a concave surface, at least one of the plurality of second sensor electrodes has a concave surface, and the plurality of first touch electrodes and the plurality of second touch electrodes are provided in a layer above the sealing film.

12 . The display device according to claim 11 , further comprising:
a second insulating film provided in a layer above the plurality of first touch electrodes and the plurality of second touch electrodes, wherein a refractive index of the second insulating film is substantially equal to a refractive index of the first insulating film.

13 . The display device according to claim 8 , further comprising:
a first insulating film having a plurality of concave portions arranged in a matrix shape in a first direction and a second direction intersecting the first direction, wherein each of the plurality of first touch electrodes includes a plurality of first sensor electrodes arranged on the first insulating film, arranged in the first direction, and electrically connected to one another, each of the plurality of second touch electrodes includes a plurality of second sensor electrodes arranged on the first insulating film, arranged in the second direction, and electrically connected to one another, and at least one of the plurality of first touch electrodes and at least one of the plurality of second touch electrodes respectively have concave surfaces according to the concave portions of the first insulating film, and the first insulating film is provided to cover the plurality of pixels.

14 . The display device according to claim 13 , further comprising:
a second insulating film provided in a layer above the plurality of first touch electrodes and the plurality of second touch electrodes, wherein a refractive index of the second insulating film is substantially equal to a refractive index of the first insulating film.

Assignees

• Japan Display Inc

Inventors

• Naganuma Tomohiko

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

• G06F3/0448

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title