Display device and a method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2022190293-A1
Application number	US-202117511702-A
Country	US
Kind code	A1
Filing date	Oct 27, 2021
Priority date	Dec 10, 2020
Publication date	Jun 16, 2022
Grant date	—

Abstract

A display device including: a substrate; a display element layer disposed on the substrate; a dam disposed around the display element layer; a plurality of patterns disposed between the dam and the display element layer, and a planarization layer disposed on the display element layer and the patterns, wherein the patterns have a hydrophile-lipophile balance value different from a hydrophile-lipophile balance value of the planarization layer.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate; a display element layer disposed on the substrate; a dam disposed around the display element layer; a plurality of patterns disposed between the dam and the display element layer; and a planarization layer disposed on the display element layer and the patterns, wherein the patterns have a hydrophile-lipophile balance value different from a hydrophile-lipophile balance value of the planarization layer.

2 . The display device of claim 1 , further comprising:
a first encapsulation layer disposed on the display element layer; and a second encapsulation layer disposed on the first encapsulation layer, wherein the planarization layer is disposed between the first encapsulation layer and the second encapsulation layer.

3 . The display device of claim 2 , wherein the first encapsulation layer and the second encapsulation layer are disposed on the dam, and the patterns are spaced apart from each other on the first encapsulation layer.

4 . The display device of claim 3 , wherein the planarization layer is spaced apart from the dam.

5 . The display device of claim 4 , wherein a number of the patterns on which the planarization layer is disposed is equal to or smaller than about 60% of a total number of the patterns.

6 . The display device of claim 1 , wherein the patterns have a lipophilicity, and the planarization layer has a hydrophilicity.

7 . The display device of claim 6 , wherein the hydrophile-lipophile balance value of the planarization layer is within a range from about 15 to about 20.

8 . The display device of claim 6 , wherein the hydrophile-lipophile balance value of the patterns is within a range from about 0 to about 5.

9 . The display device of claim 1 , wherein the patterns have a hydrophilicity, and the planarization layer has a lipophilicity.

10 . The display device of claim 1 , wherein the patterns are disposed in a matrix form.

11 . The display device of claim 1 , wherein the patterns comprise:
first patterns disposed adjacent to the display element layer; and second patterns disposed adjacent to the dam, and the first patterns and the second patterns are arranged staggered with respect to one another.

12 . A method of manufacturing a display device, comprising:
providing a substrate on which a display element layer and a dam around the display element layer are disposed; providing a plurality of patterns between the dam and the display element layer; providing an organic material on the display element layer; and inspecting whether the organic material is disposed on the patterns.

13 . The method of claim 12 , wherein the patterns have a hydrophile-lipophile balance value different from a hydrophile-lipophile balance value of the organic material.

14 . The method of claim 12 , wherein the encapsulation layer has a hydrophilicity, and the patterns have a lipophilicity.

15 . The method of claim 12 , wherein the encapsulation layer has a lipophilicity, and the patterns have a hydrophilicity.

16 . The method of claim 12 , further comprising:
providing a first encapsulation layer on the display element layer; providing the organic material on the first encapsulation layer; and curing the organic material.

17 . The method of claim 12 , wherein the inspecting of the organic material comprises:
using a camera to photograph the patterns and inspecting whether a moiré is present in the photograph; and determining whether a number of the moirés is equal to or smaller than a reference number.

18 . The method of claim 17 , wherein the reference number is about 60% of a total number of the patterns.

19 . The method of claim 18 , further comprising determining that the display device is not defective when the number of the moirés is equal to or smaller than the reference number.

20 . The method of claim 18 , further comprising determining that the display device is defective when the number of the moirés is greater than the reference number.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jeongmoon
• Kim Daehong
• Lee Hyungjin

Classifications

• H10K50/868

  Arrangements for polarized light emission (H10K50/86 takes precedence) · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K71/70 Primary

  Testing, e.g. accelerated lifetime tests · CPC title

• H10K50/844 Primary

  Encapsulations · CPC title