Display device

Patent metadata

Field	Value
Publication number	US-10739895-B2
Application number	US-201916554422-A
Country	US
Kind code	B2
Filing date	Aug 28, 2019
Priority date	Oct 10, 2014
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

A display device includes a display part that displays an image, a touch part on the display part, the touch part including a first conductive layer on the display part, a lower inorganic layer on the first conductive layer, an upper inorganic layer covering the lower inorganic layer and a second conductive layer on the upper inorganic layer. The upper inorganic layer includes substantially a same material as the lower inorganic layer. The upper inorganic layer has a hydrogen atomic percent less than a hydrogen atomic percent of the lower inorganic layer.

First claim

What is claimed is:

1. A display device, comprising:
a display part configured to display an image; and
a touch part on the display part, the touch part comprising:
a first conductive layer on the display part;
a second conductive layer on the first conductive layer; and
an inorganic layer between the first conductive layer and the second conductive layer,

wherein the inorganic layer comprises:
a first part adjacent to the first conductive layer; and
a second part closer to the second conductive layer than the first part, and

wherein the second part comprises a same material as the first part, a density of the same material being relatively higher in the first part than the second part.

2. The display device of claim 1 , wherein a hydrogen atomic percent of the second part is less than a hydrogen atomic percent of the first part.

3. The display device of claim 2 , wherein the hydrogen atomic percent of the second part is greater than 0 and less than or equal to about 20.

4. The display device of claim 3 , wherein:
the inorganic layer comprises silicon nitride; and
the second conductive layer comprises copper.

5. The display device of claim 2 , wherein a breakdown voltage of the first part is greater than or equal to about 5 MV/cm.

6. The display device of claim 5 , wherein a thickness of the first part is greater than a thickness of the second part.

7. The display device of claim 1 , wherein:
the display part comprises:
a base substrate;
an organic light emitting diode on the base substrate; and
a thin film encapsulation layer on the base substrate, the thin film encapsulation layer covering the organic light emitting diode and comprising an inorganic material; and

the first conductive layer is directly on the thin film encapsulation layer.

8. The display device of claim 7 , wherein:
the first conductive layer comprises first touch electrodes on the thin film encapsulation layer, the first touch electrodes extending in a first direction and being arranged in a second direction crossing the first direction; and
the second conductive layer comprises second touch electrodes respectively crossing the first touch electrodes and being insulated from the first touch electrodes by the second part and the first part.

9. The display device of claim 8 , wherein:
each of the first touch electrodes comprises:
first sensing parts arranged in the first direction and spaced apart from each other; and
first connection parts, each of the first connection parts being between adjacent first sensing parts among the first sensing parts to connect the adjacent first sensing parts to each other; and

each of the second touch electrodes comprises:
second sensing parts arranged in the second direction and spaced apart from each other; and
second connection parts, each of the second connection parts being between adjacent second sensing parts among the second sensing parts to connect the adjacent second sensing parts to each other.

10. The display device of claim 7 , wherein:
the first conductive layer comprises:
first sensing parts on the thin film encapsulation layer, the first sensing parts being arranged in a first direction and spaced apart from each other;
connection parts on the thin film encapsulation layer and extending in the first direction, each connection part connecting adjacent first sensing parts to each other among the first sensing parts; and
second sensing parts on the thin film encapsulation layer, the second sensing parts being arranged in a second direction crossing the first direction, spaced apart from each other, and insulated from the first sensing parts and the connection parts;

the second conductive layer comprises bridge electrodes on the second part and the first part; and
each of the bridge electrodes connects adjacent second sensing parts to each other among the second sensing parts through a thru-hole in the second part and the first part.

11. The display device of claim 1 , wherein:
the first part contacts the first conductive layer; and
the second part contacts the second conductive layer.

12. A display device, comprising:
a display part configured to display an image;
a touch part on the display part, the touch part comprising:
a first conductive layer on the display part;
a second conductive layer on the first conductive layer; and
an inorganic layer between the first conductive layer and the second conductive layer, the inorganic layer comprising a first part and a second part that comprise a same material as each other,

wherein the first conductive layer comprises:
first sensing parts arranged in a first direction and spaced apart from each other;
first connection parts, each of the first connection parts being between adjacent first sensing parts among the first sensing parts to connect the adjacent first sensing parts to each other; and
second sensing parts arranged in a second direction crossing the first direction, the second sensing parts being spaced apart from each other and insulated from the first sensing parts,

wherein the second conductive layer comprises second connection parts on the second part, each of the second connection parts being between adjacent second sensing parts among the second sensing parts to connect the adjacent second sensing parts to each other, and
wherein sides of each of the first part and the second part are aligned with each other and expose a portion of the first conductive layer.

13. The display device of claim 12 , wherein a density of the same material is relatively higher in the first part than the second part.

14. The display device of claim 12 , wherein a hydrogen atomic percent of the second part is less than a hydrogen atomic percent of the first part.

15. The display device of claim 14 , wherein the hydrogen atomic percent of the second part is greater than 0 and less than or equal to about 20.

16. The display device of claim 15 , wherein:
the inorganic layer comprises silicon nitride; and
the second conductive layer comprises copper.

17. The display device of claim 12 , wherein a breakdown voltage of the first part is greater than or equal to about 5 MV/cm.

18. The display device of claim 17 , wherein a thickness of the first part is greater than a thickness of the second part.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sangwook
• Kim Chang Ok
• Yang Sunghoon
• Im Junmo

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

• G06F2203/04103

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

• H10K59/873

  Encapsulations · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• H10K50/844

  Encapsulations · CPC title