Color conversion member and display device comprising same

Patent metadata

Field	Value
Publication number	US-12543466-B2
Application number	US-202017774691-A
Country	US
Kind code	B2
Filing date	Apr 29, 2020
Priority date	Dec 31, 2019
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

A color conversion member includes: a first sub-partition part having a width which decreases from a first surface toward a second surface; a second sub-partition part disposed on the first sub-partition part and having a width which increases from the first sub-partition part toward the second surface; and a partition part which is disposed on the second sub-partition part and includes a liquid-repellent part including a liquid-repellent additive.

First claim

The invention claimed is:

1 . A color conversion member comprising:
a base layer; a plurality of partition parts spaced apart from each other on the base layer; and a color control part disposed between the partition parts, wherein each of the partition parts has a first surface adjacent to the base layer, a second surface opposite to the first surface, and a third surface connected between the first surface and the second surface, wherein the third surface includes a recessed portion, wherein the third surface has a surface energy greater than a surface energy of the color control part, and the second surface has a surface energy less than the surface energy of the color control part, and wherein each of the partition parts comprises:
a first sub-partition part having a width which gradually decreases in a direction from the first surface to the second surface;
a second sub-partition part disposed on the first sub-partition part and having a width which gradually increases in a direction from the first sub-partition part to the second surface; and
a liquid-repellent part disposed on the second sub-partition part and comprising a liquid-repellent additive.

2 . The color conversion member of claim 1 , wherein
the liquid-repellent part has a surface energy less than the surface energy of the color control part, and each of the first sub-partition part and the second sub-partition part has a surface energy greater than the surface energy of the color control part.

3 . The color conversion member of claim 1 , wherein a top surface of the liquid-repellent part is the second surface, the second surface has the surface energy less than the surface energy of the third surface, and a difference between the surface energy of the second surface and the surface energy of the third surface is equal to or greater than about 10 dyn/cm.

4 . The color conversion member of claim 1 , wherein
when a connected portion between the first sub-partition part and the second sub-partition part has a width of W 1 , and the second sub-partition part has a maximum width of W 2 , W 1 and W 2 satisfy the following inequation:
1.5 μm≤ W 2 −W 1 ≤3.5 μm.

5 . The color conversion member of claim 1 , wherein when a connected portion between the first sub-partition part and the second sub-partition part has a width of W 1 , the second sub-partition part has a maximum width of W 2 , and a maximum height in a thickness direction of each of the partition parts is H BK , W 1 , W 2 and H BK satisfy the following inequation:
0.1≤( W 2 −W 1 )/ H BK <0.48.

6 . The color conversion member of claim 1 , wherein on a cross-section of each of the partition parts perpendicular to the base layer, a maximum width W 3 of the first sub-partition part is equal to or greater than a maximum width W 2 of the second sub-partition part.

7 . The color conversion member of claim 1 , wherein when a maximum height in a thickness direction of each of the partition parts is H BK , and a maximum height in a thickness direction of the color control part is HCP, HBK and HCP satisfy the following inequation:
0.7 *H BK ≤H CP ≤1.3 *H BK .

8 . The color conversion member of claim 1 , wherein
a height in a thickness direction of each of the partition parts is equal to or greater than about 5 μm and equal to or less than about 20 μm, and a height of the second sub-partition part is two times or more of a height of the first sub-partition part.

9 . The color conversion member of claim 1 , wherein each of the partition parts further comprises a third sub-partition part disposed between the second sub-partition part and the liquid-repellent part and having a width which gradually decreases in a direction from the second sub-partition part to the liquid-repellent part.

10 . The color conversion member of claim 9 , wherein an edge of a top surface of the third sub-partition part is a curved surface.

11 . The color conversion member of claim 9 , wherein on a cross-section of each of the partition parts perpendicular to the base layer,
the third sub-partition part comprises a flat portion having a flat top surface and a curved portion disposed on a side surface of the flat portion, and the curved portion has a width which gradually decreases in the direction from the second sub-partition part to the liquid-repellent part.

12 . The color conversion member of claim 11 , wherein the curved portion comprises:
a first curved portion disposed at one side of the flat portion; and a second curved portion symmetric to the first curved portion based on the flat portion and disposed at an opposing side of the flat portion.

13 . The color conversion member of claim 11 , wherein when, on the cross-section, the second sub-partition part has a maximum width of W 2 , and the curved portion has a maximum width of W CP , W 2 and W CP satisfy the following inequation:
W CP ≤0.4 *W 2 .

14 . The color conversion member of claim 11 , wherein an edge of a top surface of the color control part overlaps the curved portion.

15 . The color conversion member of claim 9 , wherein when a maximum width of the second sub-partition part is W 2 , and a maximum height from the second sub-partition part to a top surface of the third sub-partition part is H C , W 2 and H C satisfy the following inequation:
0 ≤H C /( W 2 /2)≤0.5.

16 . The color conversion member of claim 9 , wherein a height in a thickness direction of the third sub-partition part is about 30% or less of a height in a thickness direction of each of the partition parts.

17 . The color conversion member of claim 9 , wherein each of the partition parts further comprises:
a fourth sub-partition part disposed on the third sub-partition part and having a width which gradually decreases in a direction from the third sub-partition part to the liquid-repellent part; and a fifth sub-partition part disposed between the fourth sub-partition part and the liquid-repellent part and having a width which gradually increases in the direction from the third sub-partition part to the liquid-repellent part.

18 . The color conversion member of claim 17 , wherein when a connected portion between the fourth sub-partition part and the fifth sub-partition part has a width of W 4 , the fifth sub-partition part has a maximum width of W 5 , and a distance in a thickness direction from the third sub-partition part to a maximum height of the partition part is H BK-3 , W 4 , W 5 and H BK-3 satisfy the following inequation:
0.1≤( W 5 −W 4 )/ H BK-3 <0.48.

19 . The color conversion member of claim 1 , wherein the liquid-repellent additive is a copolymer comprising a perfluoropolyether (PFPE) derivative as a side chain.

20 . The color conversion member of claim 1 , wherein a weight of the liquid-repellent additive is equal to or greater than about 0.01 wt % and equal to or less than about 10 wt % based on a total weight of each of the partition parts.

21 . The color conversion member of claim 1 , wherein on a cross-section of each of the partition parts, a side surface of the second sub-partition part has an inclined angle greater than about 90° to the base layer.

22 . The color conversion member of claim 1 , wherein the color control part comprises a quantum dot.

23 . The color conversion member of claim 1 , wherein the color control part comprises:
a first color control part which transm

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Min-Hee
• Kwon Sunyoung
• Kim Min-Jae
• Kim Taehoon
• Park Kyunghae
• Park Joon-Hyung
• Yang Danbi
• Yu Hanjun
• Youn Dokyung
• Lee Chang-Hun

Classifications

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K2102/331

  Nanoparticles used in non-emissive layers, e.g. in packaging layer · CPC title

• H10K50/80

  Constructional details · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title