Display device

Patent metadata

Field	Value
Publication number	US-11042237-B2
Application number	US-201916715768-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	Mar 6, 2019
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A display device that includes a substrate and a bank layer disposed on the substrate. The bank layer defines an emission area and a non-emission area of a pixel. A spacer is disposed on a portion of the bank layer. A touch member is disposed above the spacer. At least one overcoat layer is disposed on the touch member. A dielectric constant of the at least one overcoat layer in a region overlapping the spacer in a thickness direction of the substrate is larger than a dielectric constant of the overcoat layer in a region that does not overlap the spacer in the thickness direction of the substrate.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a bank layer disposed on the substrate and defining an emission area and t anon-emission area of a pixel;
a spacer disposed on a portion of the bank layer in the non-emission area of the pixel;
a touch member disposed above the spacer; and
at least one overcoat layer disposed on the touch member,
wherein a dielectric constant of the at least one overcoat layer in a region overlapping the spacer in a thickness direction of the substrate is larger than dielectric constant of the at least one overcoat layer in a region that does not overlap the spacer in the thickness direction of the substrate.

2. The display device of claim 1 , wherein the at least, one overcoat layer comprises:
a first overcoat layer having a first dielectric constant, the first overcoat layer positioned in the region that does not overlap the spacer in the thickness direction of the substrate; and
a second overcoat layer having a second dielectric constant that is greater than the first dielectric constant, the second overcoat layer positioned in the region that overlaps the spacer in the thickness direction of the substrate.

3. The display device of claim 2 , wherein the first overcoat layer is in contact with the second overcoat layer and substantially does not overlap with the second overcoat layer in the thickness direction of the substrate.

4. The display device of claim 3 , wherein a distance of a top surface of the first overcoat layer to a top surface of the substrate is substantially equal to a distance of a top surface of the second overcoat layer to the top surface at the substrate.

5. The display device of claim 2 , wherein the touch member comprises a touch conductive layer that is positioned in the non-emission area.

6. The display device of claim 5 , wherein the touch conductive layer comprises an opaque metal.

7. The display device of claim 6 , wherein the touch conductive layer comprises a first touch conductive layer and a second touch conductive layer, and wherein the touch member comprises the first touch conductive layer, a first touch insulating layer disposed on the first touch conductive layer, the second touch conductive layer disposed on the first touch insulating layer, and a second touch insulating layer disposed on the second touch conductive layer.

8. The display device of claim 7 , wherein the touch member comprises sensing electrodes comprising sensor parts in a mesh pattern.

9. The display device of claim 5 , wherein the second overcoat layer overlaps with a portion of the touch conductive layer overlapping the spacer it the thickness direction of the substrate, and does not overlap with a portion of the touch conductive layer that does not overlap the spacer in the thickness direction of the substrate.

10. The display device of claim 2 , further comprising: a light-blocking pattern disposed on the touch member and overlapping with the bank layer in the thickness direction of the substrate, wherein the light-blocking pattern is disposed between the touch member and the at least one overcoat laver.

11. The display device of claim 10 , wherein the second overcoat layer is disposed on the light-blocking pattern and has a width that is smaller than a width of the light-blocking pattern.

12. The display device of claim 1 , wherein the spacer is disposed directly on the portion of the bank layer.

13. A display device comprising:
a substrate;
a bank layer disposed on the substrate and defining an emission area and a non-emission area of a pixel;
a spacer disposed on a portion of the bank layer in the non-emission area of the pixel;
at least one overcoat layer disposed on an encapsulation layer disposed above the bank laver; and
a touch member disposed on the at least one overcoat layer,
wherein a dielectric constant of the at least one overcoat layer in a region overlapping the spacer in a thickness direction of the substrate is smaller than a dielectric constant of the overcoat layer in a region that does not overlap the spacer in the thickness direction of the substrate.

14. The display device of claim 13 , wherein the at least one overcoat layer comprises:
a first overcoat layer having a first dielectric constant, the first overcoat layer positioned in the region that does not overlap the spacer in the thickness direction of the substrate; and
a second overcoat layer having a second dielectric constant that is smaller than the first dielectric constant, the second overcoat layer positioned in the region that overlaps the spacer in the thickness direction of the substrate.

15. The display device of claim 14 , wherein the touch member comprises a touch conductive layer that is positioned in the non-emission area.

16. The display device of claim 15 , wherein the touch conductive layer comprises an opaque metal.

17. The display device of claim 16 , wherein the touch conductive layer comprises a first touch conductive layer and a second touch conductive layer, and wherein the touch member comprises the first touch conductive layer, a first touch insulating layer disposed on the first touch conductive layer, the second touch conductive layer disposed on the first touch insulating layer, and a second touch insulating layer disposed on the second touch conductive layer.

18. The display device of claim 17 , wherein the touch member comprises sensing electrodes comprising sensor parts in a Mesh pattern.

19. The display device of claim 15 , wherein the second overcoat layer overlaps with a portion of the touch conductive layer overlapping the spacer in the thickness direction of the substrate, and does not overlap with a portion of the touch conductive layer that does not overlap the spacer in the thickness direction of the substrate.

20. The display device of claim 14 , further comprising: a light-blocking pattern disposed on the encapsulation layer and overlapping with the bank layer in the thickness direction of the substrate, wherein the light-blocking pattern is disposed between the encapsulation layer and the at least one overcoat layer.

21. The display device of claim 20 , wherein the second overcoat layer is disposed on the light-blocking pattern and has a width that is smaller than a width of the light-blocking pattern.

22. The display device of claim 13 , wherein the spacer is disposed directly on the portion of the bank layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Hyeon Bum
• JUNG Jin Whan

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · 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