Input sensing unit and display device including the same

Patent metadata

Field	Value
Publication number	US-2019042020-A1
Application number	US-201815893689-A
Country	US
Kind code	A1
Filing date	Feb 11, 2018
Priority date	Aug 7, 2017
Publication date	Feb 7, 2019
Grant date	—

Abstract

An input sensing unit including a plurality of capacitive sensing electrodes, and a conductive layer disposed on at least a portion of the sensing electrodes, in which the conductive layer overlaps at least a portion of the sensing electrodes in a plan view, and the conductive layer includes a plurality of conductive patterns spaced apart from each other.

First claim

What is claimed is:

1 . An input sensing unit comprising:
a plurality of capacitive sensing electrodes; and a conductive layer disposed on at least a portion of the sensing electrodes, wherein: the conductive layer overlaps at least a portion of the sensing electrodes in a plan view; and the conductive layer comprises a plurality of conductive patterns spaced apart from each other.

2 . The input sensing unit of claim 1 , wherein the conductive patterns disposed on different sensing electrodes are spaced apart from each other.

3 . The input sensing unit of claim 2 , wherein a distance between the conductive patterns is greater than a distance between the sensing electrodes.

4 . The input sensing unit of claim 1 , further comprising:
a first region in which the sensing electrodes are disposed; and a second region in which the sensing electrodes are not disposed, wherein the conductive patterns are disposed only in the first region.

5 . The input sensing unit of claim 1 , wherein the conductive patterns have a mesh shape.

6 . The input sensing unit of claim 1 , wherein:
the conductive patterns comprises conductive metal oxide; and the conductive metal oxide comprises at least one of indium tin oxide (ITO), indium zinc oxide (IZO), antimony zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), tin oxide (SnO 2 ), and mixtures thereof.

7 . The input sensing unit of claim 1 , further comprising an insulating member disposed between the conductive patterns and the sensing electrodes.

8 . The input sensing unit of claim 1 , wherein:
the sensing electrodes comprise:
a first sensing electrode; and
a second sensing electrode spaced apart from the first sensing electrode and forming a capacitance with the first sensing electrode;
the first sensing electrode and the second sensing electrode are provided in plural, respectively; the input sensing unit further comprises:
a first connector connecting the first sensing electrodes adjacent to each other; and
a second connector connecting the second sensing electrodes adjacent to each other;
the first sensing electrodes and the second sensing electrodes are disposed on the same layer; and
one of the first connector and the second connector is disposed on the same layer as the is first sensing electrodes and the second sensing electrodes.

9 . The input sensing unit of claim 8 , wherein the conductive pattern disposed on the first sensing electrodes and the conductive pattern disposed on the second sensing electrodes are spaced apart from each other.

10 . The input sensing unit of claim 1 , wherein:
the sensing electrode comprises a first sensing electrode column comprising a plurality of first sensing electrodes arranged in a first direction; and a second sensing electrode column comprising a plurality of second sensing electrodes arranged in the first direction and extending in the first direction; the first sensing electrode column and the second sensing electrode column are disposed adjacent to each other in a second direction crossing the first direction; a first one of the first sensing electrodes corresponds to the second sensing electrodes; the second sensing electrodes corresponding to the first one of the first sensing electrodes, respectively, are electrically connected to the second sensing electrodes corresponding to a second one of the first sensing electrodes adjacent to the first one of the first sensing electrodes; and the conductive pattern disposed on the first sensing electrode and the conductive pattern disposed on the second sensing electrode are spaced apart from each other.

11 . The input sensing unit of claim 1 , wherein:
the sensing electrode comprises a plurality of conductive fine lines forming a mesh shape; and the conductive pattern is disposed on a mesh hole formed by the conductive fine lines intersecting each other.

12 . The input sensing unit of claim 11 , wherein the conductive pattern has a mesh shape.

13 . The input sensing unit of claim 1 , wherein:
the sensing electrode comprises a plurality of conductive fine lines forming a mesh shape; the conductive patterns are disposed on one sensing electrode; and the conductive patterns are spaced apart from each other with the conductive fine line interposed therebetween in a plan view.

14 . The input sensing unit of claim 1 , wherein:
the sensing electrodes and the conductive layer comprise a conductive polymer; and an insulating layer comprising an insulating polymer is disposed between the sensing electrodes and the conductive layer.

15 . A display device comprising:
a substrate; a display unit disposed on the substrate; and an input sensing unit disposed on the display unit, wherein: the input sensing unit comprises:
a plurality of capacitive sensing electrodes; and
a conductive layer disposed on at least a portion of the sensing electrodes;
the conductive layer is disposed to overlap at least a portion of the sensing electrodes in a plan view; the conductive layer comprises a plurality of conductive patterns spaced apart from each other; and the conductive patterns disposed on different sensing electrodes are spaced apart from each other.

16 . The display device of claim 15 , wherein:
the display unit comprises a plurality of pixel units; the sensing electrode comprises a plurality of conductive fine lines forming a mesh shape; and each of the pixel units is disposed in a mesh hole formed by the conductive fine lines intersecting each other.

17 . The display device of claim 16 , wherein:
a plurality of conductive patterns are disposed to be spaced apart from each other; and the conductive patterns and the pixel units correspond to each other, respectively.

18 . The display device of claim 16 , wherein:
each of the pixel units comprises:
a first electrode;
a second electrode disposed on the first electrode; and
an emission layer disposed between the first electrode and the second electrode; and
at least one encapsulation layer is disposed between the second electrode and the sensing electrode.

19 . The display device of claim 18 , wherein:
the input sensing unit is disposed directly on the encapsulation layer; and at least one insulating layer is disposed between the sensing electrode and the encapsulation layer.

20 . The display device of claim 18 , wherein:
the encapsulation layer comprises a multilayer; and at least one layer of the multilayered encapsulation layer comprises an inorganic material.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Kyung Seop
• Han Sang Youn
• Kee In Seo
• Shim Jin Bo
• Bang Gyeong Nam

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

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F2203/04103

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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title