Display apparatus

Patent metadata

Field	Value
Publication number	US-11081676-B2
Application number	US-202016844561-A
Country	US
Kind code	B2
Filing date	Apr 9, 2020
Priority date	Jul 11, 2019
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

A display apparatus may include a substrate, a display element disposed above the substrate, an encapsulation layer disposed above the display element and including an inorganic encapsulation layer and an organic encapsulation layer, and a touch-sensing layer disposed above the encapsulation layer. The touch-sensing layer may include a first insulating layer including a side surface inclined with respect to a top surface of the encapsulation layer and including an organic material. The touch-sensing layer may include a conductive layer including sensing electrodes, and a second insulating layer covering the conductive layer and including a refractive index that may be different from that of the first insulating layer.

First claim

What is claimed is:

1. A display apparatus comprising:
a substrate;
a display element disposed above the substrate, the display element being in a display area;
an encapsulation layer disposed above the display element and comprising an inorganic encapsulation layer and an organic encapsulation layer; and
a touch-sensing layer disposed above the encapsulation layer,
wherein the touch-sensing layer comprises:
a first insulating layer disposed above the encapsulation layer, a portion of the first insulating layer comprising a side surface inclined with respect to a top surface of the encapsulation layer and comprising an organic material, wherein the inclined side surface is in the display area;
a conductive layer comprising sensing electrodes; and
a second insulating layer covering the conductive layer and

including a refractive index different from that of the first insulating layer.

2. The display apparatus of claim 1 , wherein
at least a portion of the first insulating layer contacts the top surface of the encapsulation layer.

3. The display apparatus of claim 2 , wherein the encapsulation layer comprises:
a first inorganic encapsulation layer;
an organic encapsulation layer; and
a second inorganic encapsulation layer,
wherein
the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are stacked on each other, and
a portion of the first insulating layer contacts the second inorganic encapsulation layer.

4. The display apparatus of claim 1 , wherein
the first insulating layer comprises a photoresist.

5. The display apparatus of claim 1 , wherein
the first insulating layer comprises a first opening defined by the side surface thereof and overlapping an emission area of the display element, and
the second insulating layer at least partially fills the first opening of the first insulating layer.

6. The display apparatus of claim 5 , wherein
a refractive index of the second insulating layer is greater than a refractive index of the first insulating layer.

7. The display apparatus of claim 5 , wherein the display element comprises:
a pixel electrode;
a pixel defining layer covering an edge of the pixel electrode and comprising a second opening overlapping the pixel electrode;
an emission layer disposed at the second opening; and
an opposite electrode covering the emission layer,
wherein a body portion of the first insulating layer overlaps the pixel defining layer.

8. The display apparatus of claim 7 , wherein
a width of the first opening of the first insulating layer is greater than a width of the second opening of the pixel defining layer.

9. The display apparatus of claim 1 , wherein
the first insulating layer overlaps an emission area of the display element and has a width greater than that of the emission area.

10. The display apparatus of claim 9 , wherein
the side surface of the first insulating layer comprises an inclined surface reverse-tapered in a direction away from the encapsulation layer.

11. The display apparatus of claim 9 , wherein the display element comprises:
a pixel electrode;
a pixel defining layer covering an edge of the pixel electrode and comprising a second opening overlapping the pixel electrode;
an emission layer overlapping the second opening; and
an opposite electrode covering the emission layer, wherein
a central portion of the first insulating layer overlaps the second opening of the pixel defining layer, and
a periphery portion of the first insulating layer overlaps the pixel defining layer.

12. The display apparatus of claim 9 , wherein
a refractive index of the first insulating layer is greater than a refractive index of the second insulating layer.

13. The display apparatus of claim 1 , wherein the inclination angle θ of the inclined surface is less than 90 degrees and greater than or equal to 70 degrees.

14. The display apparatus of claim 1 , wherein the inclined side surface of the first insulating layer surrounds an emission area of the display element.

15. A display apparatus comprising:
a substrate;
a pixel electrode disposed above the substrate, the pixel electrode being in a display area;
a pixel defining layer comprising an opening overlapping the pixel electrode and defining an emission area;
an emission layer disposed in the opening;
an opposite electrode disposed above the emission layer;
an encapsulation layer disposed above the opposite electrode and comprising an inorganic encapsulation layer and an organic encapsulation layer;
a conductive layer disposed above the encapsulation layer and comprising a sensing electrode;
a first organic insulating layer disposed above the encapsulation layer, a portion of the first insulating layer comprising a side surface inclined with respect to a top surface of the encapsulation layer, wherein the inclined side surface is in the display area and surrounds the opening of the pixel defining layer in a plan view; and
a second organic insulating layer covering the first organic insulating layer and the conductive layer and including a refractive index different from that of the first organic insulating layer.

16. The display apparatus of claim 15 , wherein
the first organic insulating layer comprises a photoresist.

17. The display apparatus of claim 15 , wherein the encapsulation layer comprises;
a first inorganic encapsulation layer;
an organic encapsulation layer; and
a second inorganic encapsulation layer, wherein
the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are stacked on each other, and
a portion of the first organic insulating layer contacts the second inorganic encapsulation layer.

18. The display apparatus of claim 15 , wherein the first organic insulating layer comprises:
a first opening overlapping the opening of the pixel defining layer; and
a body portion overlapping a body portion of the pixel defining layer.

19. The display apparatus of claim 18 , wherein
a width of the first opening of the first organic insulating layer is greater than a width of the opening of the pixel defining layer.

20. The display apparatus of claim 18 , wherein
the second organic insulating layer at least partially fills the first opening, and
a refractive index of the second organic insulating layer is greater than a refractive index of the first organic insulating layer.

21. The display apparatus of claim 15 , wherein
the first organic insulating layer comprises a body portion overlapping the opening of the pixel defining layer,
the side surface of the first organic insulating layer comprises an inclined surface reverse-tapered in a direction away from the encapsulation layer, and
a refractive index of the second organic insulating layer is less than a refractive index of the first organic insulating layer.

22. The display apparatus of claim 15 , wherein
a periphery portion of the first organic insulating layer overlaps a portion of a body portion of the pixel defining layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Woongsik
• Byun Jinsu
• Lee Sanghyun
• Cha Gwangmin
• Han Saehee

Classifications

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• H10K59/879 Primary

  comprising refractive means, e.g. lenses · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title