Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016190519-A1
Application number	US-201514837045-A
Country	US
Kind code	A1
Filing date	Aug 27, 2015
Priority date	Dec 29, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A display device including a substrate, a display unit on the substrate and including a display element for displaying an image, at least one organic encapsulation film formed on the display unit, and at least one refractive-index control encapsulation film adjacent to the at least one organic encapsulation film. A refractive index of a region of the at least one refractive-index control encapsulation film closer to the at least one organic encapsulation film is closer to a refractive index of the at least one organic encapsulation film than is a refractive index of a region of the at least one refractive-index control encapsulation film further from the at least one organic encapsulation film.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate; a display unit on the substrate and including a display element for displaying an image; at least one organic encapsulation film on the display unit; and at least one refractive-index control encapsulation film adjacent to the at least one organic encapsulation film, wherein a refractive index of a region of the at least one refractive-index control encapsulation film close rto the at least one organic encapsulation film is closer to a refractive index of the at least one organic encapsulation film than is a refractive index of a region of the at least one refractive-index control encapsulation film further from the at least one organic encapsulation film.

2 . The display device as claimed in claim 1 , wherein the refractive index of the at least one refractive-index control encapsulation film gradually increases from the region of the at least one refractive-index control encapsulation film closer to the at least one organic encapsulation film towards the region of the at least one refractive-index control encapsulation film further from the at least one organic encapsulation film.

3 . The display device as claimed in claim 1 , wherein the at least one refractive-index control encapsulation film includes an inorganic material.

4 . The display device as claimed in claim 3 , wherein the at least one refractive-index control encapsulation film includes silicon oxide.

5 . The display device as claimed in claim 3 , further comprising at least one inorganic encapsulation film on the display unit, wherein the at least one refractive-index control encapsulation film is between the at least one organic encapsulation film and the at least one inorganic encapsulation film.

6 . The display device as claimed in claim 3 , wherein the refractive index of the at least one refractive-index control encapsulation film gradually increases from the at least one organic encapsulation film towards the at least one inorganic encapsulation film.

7 . The display device as claimed in claim 3 , wherein the at least one refractive-index control encapsulation film is thinner than the at least one inorganic encapsulation film.

8 . The display device as claimed in claim 1 , wherein:
the display device comprises a plurality of organic encapsulation films on the display unit, the at least one refractive-index control encapsulation film is at least between two adjacent organic encapsulation films among the plurality of organic encapsulation films, and the refractive index of the at least one refractive-index control encapsulation film gradually increases from surfaces of the at least one refractive-index control encapsulation film facing the two adjacent organic encapsulation films towards a center of the at least one refractive-index control encapsulation film.

9 . The display device as claimed in claim 1 , wherein the at least one refractive-index control encapsulation film comprises:
a first control encapsulation film; and a second control encapsulation film adjacent to the first control encapsulation film and further from the at least one organic encapsulation film than the first control encapsulation film, wherein a refractive index of the first control encapsulation film is closer to the refractive index of the at least one organic encapsulation film than to a refractive index of the second control encapsulation film.

10 . The display device as claimed in claim 9 , wherein the refractive index of the first control encapsulation film is less than the refractive index of the second control encapsulation film.

11 . The display device as claimed in claim 9 , wherein the first control encapsulation film includes silicon oxide.

12 . The display device as claimed in claim 9 , wherein the first control encapsulation film is thinner than the second control encapsulation film.

13 . The display device as claimed in claim 9 , wherein:
the at least one refractive-index control encapsulation film further includes a third control encapsulation film, the second control encapsulation film is between the first control encapsulation film and the third control encapsulation film, and a refractive index of the third control encapsulation film is less than the refractive index of the second control encapsulation film.

14 . The display device as claimed in claim 13 , wherein:
the display device includes a plurality of organic encapsulation films on the display unit, the at least one refractive-index control encapsulation film is at least between two adjacent organic encapsulation films among the plurality of organic encapsulation films, and the first control encapsulation film are arranged adjacent to a first one of the two adjacent organic encapsulation films, and the third control encapsulation film are arranged adjacent to a second one of the two adjacent organic encapsulation films.

15 . The display device as claimed in claim 13 , wherein the third control encapsulation film is thinner than the second control encapsulation film.

16 . The display device as claimed in claim 1 , wherein the display element comprises an organic light-emitting diode (OLED).

17 . A method of manufacturing a display device, the method comprising:
forming a display unit on a substrate to display an image; forming at least one organic encapsulation film on the display unit; and forming at least one refractive-index control encapsulation film to be adjacent to the at least one organic encapsulation film, wherein a refractive index of a region of the at least one refractive-index control encapsulation film closer to the at least one organic encapsulation film is closer to a refractive index of the at least one organic encapsulation film than is a refractive index of a region of the at least one refractive-index control encapsulation film further from the at least one organic encapsulation film.

18 . The method as claimed in claim 17 , wherein forming the at least one refractive-index control encapsulation film is performed using a deposition process,
wherein, during the deposition process, the method further includes controlling a type and amount of a source gas such that the refractive index of the at least one refractive-index control encapsulation film gradually increases from the region of the at least one refractive-index control encapsulation film closer to the at least one organic encapsulation film towards the region of the at least one refractive-index control encapsulation film further from the at least one organic encapsulation film.

19 . A display device, comprising:
a substrate; a display unit on the substrate and including a display element for displaying an image; at least one organic encapsulation film on the display unit; at least one inorganic encapsulation film on the display unit; and at least one refractive-index control encapsulation film between adjacent ones of the at least one organic encapsulation film and the at least one inorganic encapsulation film, wherein a refractive index of the at least one refractive-index control encapsulation film is between a refractive index of the at least one organic encapsulation film and a refractive index of the at least one inorganic encapsulation film.

20 . The display device as claimed in claim 19 , wherein the refractive index of the at least one refractive-index control encapsulation film gradually changes from the refractive index of the at least one organic encapsulation film to the refra

Assignees

• Samsung Display Co Ltd
• Postech Acad Ind Found

Inventors

• Cho Sanghwan
• Song Seungyong
• Lee Jonglam
• Choi Chungsock
• Lee Bola
• Lee Illhwan

Classifications

• H10K59/8731 Primary

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

• H10K50/858

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

• H10K59/879 Primary

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

• H01L27/3244

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic