Display device and method of manufacturing display device

Patent metadata

Field	Value
Publication number	US-11599229-B2
Application number	US-201917295776-A
Country	US
Kind code	B2
Filing date	Sep 23, 2019
Priority date	Dec 10, 2018
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

Provided is a display device including a display panel having a plurality of pixel regions, a first insulating layer on the display panel, having a first refractive index, and having a plurality of first openings defined in regions which overlap the plurality of pixel regions, a second insulating layer directly on the first insulating layer and having a plurality of second openings defined in regions which correspond to the plurality of first openings, and a third insulating layer covering the display panel, the first insulating layer, and the second insulating layer and having a second refractive index higher than the first refractive index, wherein the third insulating layer may overlap the plurality of pixel regions on a plane.

First claim

The invention claimed is:

1. A display device comprising:
a display panel comprising a plurality of pixel regions;
a first insulating layer on the display panel, comprising a first refractive index, and a plurality of first openings overlapping the plurality of pixel regions;
a second insulating layer directly on the first insulating layer and comprising a plurality of second openings corresponding to the plurality of first openings; and
a third insulating layer covering the display panel, the first insulating layer, and the second insulating layer, and comprising a second refractive index higher than the first refractive index, wherein the third insulating layer overlaps the plurality of pixel regions on a plane,
wherein the plurality of first openings are defined by removing portions of the first insulating layer, respectively, and
wherein the plurality of second openings are defined by removing portions of the second insulating layer, respectively.

2. The display device of claim 1 , further comprising:
a first conductive layer on the display panel; and
a second conductive layer on the first conductive layer.

3. The display device of claim 2 , further comprising an interlayer insulating layer between the first conductive layer and the second conductive layer,
wherein the first insulating layer is on the second conductive layer.

4. The display device of claim 2 , wherein the first insulating layer and the second insulating layer are between the first conductive layer and the second conductive layer.

5. The display device of claim 4 ,
wherein the first conductive layer comprises a connection portion,
wherein the second conductive layer comprises sensor portions,
wherein a touch contact hole is defined in the first and second insulating layers, and
wherein the connection portion is electrically connected to the sensor portions.

6. The display device of claim 5 , wherein each of the sensor portions has a mesh shape, and the sensor portions do not overlap the plurality of pixel regions.

7. The display device of claim 4 , wherein the third insulating layer is on the second conductive layer and covers the second conductive layer.

8. The display device of claim 1 , wherein the first insulating layer includes a first organic material, the second insulating layer includes an inorganic material, and the third insulating layer includes a second organic material.

9. The display device of claim 1 , wherein each of the plurality of first openings and the plurality of second openings is filled with the third insulating layer.

10. The display device of claim 1 , wherein the first insulating layer further comprises a plurality of first auxiliary openings and each of the plurality of first auxiliary openings surrounds a corresponding first opening among the first openings.

11. The display device of claim 10 , wherein the second insulating layer further comprises a plurality of second auxiliary openings, and the plurality of second auxiliary openings correspond to the plurality of first auxiliary openings.

12. The display device of claim 1 , wherein a thickness of the first insulating layer is greater than a thickness of the second insulating layer.

13. The display device of claim 1 , wherein the first refractive index is about 1.45 to about 1.55, and the second refractive index is about 1.60 to about 1.70.

14. A method for manufacturing a display device, the method comprising:
forming a display panel comprising a plurality of pixel regions;
forming, on the display panel, a first preliminary layer comprising a first refractive index;
forming a second preliminary layer comprising an inorganic material on the first preliminary layer;
forming a mask by forming a plurality of mask openings in regions of the second preliminary layer;
forming a first insulating layer by forming a plurality of openings overlapping the plurality of mask openings in the first preliminary layer; and
forming, on the mask, a cover layer comprising a second refractive index higher than the first refractive index.

15. The method of claim 14 , wherein the forming the display panel comprises:
forming a base layer;
forming a circuit layer on the base layer;
forming a light-emitting layer on the circuit layer; and
forming an encapsulation layer on the light-emitting layer.

16. The method of claim 15 , further comprising:
forming a buffer layer on the encapsulation layer;
forming a first conductive layer on the buffer layer;
forming an interlayer insulating layer covering the first conductive layer; and
forming a second conductive layer on the interlayer insulating layer,
wherein the first preliminary layer is formed on the second conductive layer.

17. The method of claim 15 , wherein the regions of the second preliminary layer overlap the plurality of pixel regions.

18. The method of claim 17 , wherein the forming the mask further comprises forming a plurality of auxiliary mask openings that correspond one-to-one to and surround the plurality of mask openings.

19. The method of claim 14 , wherein the first preliminary layer comprises a first organic material, and the cover layer comprises a second organic material.

20. The method of claim 15 , further comprising:
forming a buffer layer on the encapsulation layer;
forming a first conductive layer on the buffer layer; and
forming a second conductive layer on the first conductive layer,
wherein the mask and the first insulating layer are formed between the first conductive layer and the second conductive layer, and the cover layer is formed on the second conductive layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Son Jungha
• Kim Gee-Bum
• Kim Sangwoo
• Lee Kijune
• Ahn Taekyung
• Yoo Byung Han
• Lim Jaeik
• Choi Chaungi

Classifications

• H10K59/879

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

• 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

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title