Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2020303684-A1
Application number	US-202016812350-A
Country	US
Kind code	A1
Filing date	Mar 8, 2020
Priority date	Mar 22, 2019
Publication date	Sep 24, 2020
Grant date	—

Abstract

A display device including a display area and a non-display area, a substrate including a through hole in the display area, an element layer including an anode disposed on the substrate, a light emitting layer disposed on the anode, and a cathode disposed on the light emitting layer, and a thin-film encapsulation layer including a first inorganic layer disposed on the element layer, an organic layer disposed on the first inorganic layer, and a second inorganic layer disposed on the organic layer, in which the first inorganic layer includes a plurality of first refractors having a first inclination angle.

First claim

What is claimed is:

1 . A display device comprising:
a display area and a non-display area; a substrate including a through hole in the display area; an element layer including an anode disposed on the substrate, a light emitting layer disposed on the anode, and a cathode disposed on the light emitting layer; and a thin-film encapsulation layer including a first inorganic layer disposed on the element layer, an organic layer disposed on the first inorganic layer, and a second inorganic layer disposed on the organic layer, wherein the first inorganic layer includes a plurality of first refractors having a first inclination angle.

2 . The display device of claim 1 , wherein the first refractors are disposed on the cathode.

3 . The display device of claim 2 , wherein the first inclination angle defines a degree of inclination with respect to an imaginary line substantially perpendicular to an upper surface of the cathode.

4 . The display device of claim 2 , wherein a path of light emitted from the light emitting layer is configured to be refracted to the greater extent as the first inclination angle increases.

5 . The display device of claim 1 , wherein the first inorganic layer further includes a plurality of first voids formed between the first refractors.

6 . The display device of claim 5 , wherein at least a portion of the first voids are filled with the organic layer.

7 . The display device of claim 1 , wherein the non-display area includes a hole peripheral area along a rim of the through hole.

8 . The display device of claim 7 , wherein:
the non-display area further includes a peripheral area; and the light emitting layer has a first light emitting area and a second light emitting area disposed in the display area, and a third light emitting area disposed in the peripheral area.

9 . The display device of claim 8 , wherein light emitted from the first light emitting area is configured to pass through the first refractors and travel to a first virtual light emitting area overlapping the through hole.

10 . The display device of claim 8 , wherein light emitted from the second light emitting area is configured to pass through the first refractors and travel to a second virtual light emitting area overlapping the hole peripheral area.

11 . The display device of claim 8 , wherein light emitted from the third light emitting area is configured to pass through the first refractors and travel to a third virtual light emitting area overlapping the display area.

12 . The display device of claim 1 , wherein the second inorganic layer includes second refractors having a second inclination angle.

13 . The display device of claim 12 , wherein the second inclination angle is the same as the first inclination angle.

14 . The display device of claim 12 , wherein the second inclination angle is greater than the first inclination angle.

15 . The display device of claim 12 , further comprising a third inorganic layer disposed on the second inorganic layer.

16 . The display device of claim 15 , wherein the second inorganic layer includes a plurality of second voids formed between the second refractors.

17 . The display device of claim 16 , wherein at least a portion of the second voids are filled with the third inorganic layer.

18 . A method of manufacturing a display device, the method comprising:
forming an element layer on a substrate having a through hole in a display area, the element layer including an anode, a light emitting layer, and a cathode sequentially disposed on the substrate; and forming a thin-film encapsulation layer on the element layer, comprising:
forming a first inorganic layer including a plurality of first refractors having a first inclination angle;
forming an organic layer disposed on the first inorganic layer; and
forming a second inorganic layer disposed on the organic layer.

19 . The method of claim 18 , wherein forming the first inorganic layer comprises forming a film while the substrate is placed to form a first angle with respect to an imaginary line substantially perpendicular to a surface from which a source is emitted, and an upper surface of the substrate is kept constant.

20 . The method of claim 19 , wherein after the first refractors having a first directionality are formed using an anti-deposition plate, the substrate is rotated such that the first refractors having a second directionality different from the first directionality are formed on the first inorganic layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hyun
• Kim Sun Ho
• Lee Sun Hee

Classifications

• H10K59/8052

  Cathodes · CPC title

• H10K59/8731

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

• H10K59/879 Primary

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

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title