Display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10670901-B2
Application number	US-201815997152-A
Country	US
Kind code	B2
Filing date	Jun 4, 2018
Priority date	Nov 17, 2017
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A display apparatus includes a first base substrate, a partitioning wall pattern disposed between a first pixel area and a second pixel area and on the first base substrate, a first color conversion pattern disposed in the first pixel area and including quantum dot particles and/or phosphor, a first fluorine layer disposed on the first color conversion layer, fluorine content of the first fluorine layer being higher than that of the first color conversion pattern, and a second color conversion pattern disposed in the second pixel area and including quantum dot particles and/or phosphor.

First claim

What is claimed is:

1. A display apparatus, comprising:
a first base substrate;
a partitioning wall pattern between a first pixel area and a second pixel area and on the first base substrate;
a first color conversion pattern in the first pixel area and comprising quantum dot particles and/or phosphor;
a first fluorine layer on the first color conversion pattern, a fluorine content of the first fluorine layer being higher than that of the first color conversion pattern; and
a second color conversion pattern in the second pixel area and comprising quantum dot particles and/or phosphor,
an upper surface of the first fluorine layer having a convex shape with respect to the first base substrate.

2. The display apparatus of claim 1 , further comprising:
a hydrophobic layer on the partitioning wall pattern.

3. The display apparatus of claim 1 , further comprising:
a light blocking pattern overlapping with the partitioning wall pattern and comprising a light blocking material.

4. The display apparatus of claim 1 , further comprising:
a second fluorine layer on the second color conversion pattern, a fluorine content of the second fluorine layer being higher than that of the second color conversion pattern,
wherein a refractive index of the first fluorine layer is lower than that of the first color conversion pattern, and
a refractive index of the second fluorine layer is lower than that of the second color conversion pattern.

5. The display apparatus of claim 4 , further comprising:
a third pixel area spaced apart from the first and second pixel areas;
a transparent layer in the first pixel area, the second pixel area, and the third pixel area to cover the first fluorine layer and the second fluorine layer;
a second base substrate facing the first base substrate;
a thin film transistor on the second base substrate;
a liquid crystal layer between the first base substrate and the second base substrate; and
a backlight unit for emitting a blue light,
wherein the first color conversion pattern comprises red quantum dot particles and/or red phosphor, and the second color conversion pattern comprises green quantum dot particles and/or green phosphor.

6. The display apparatus of claim 5 , further comprising:
a wire grid polarizer on the transparent layer; and
an insulation layer on the wire grid polarizer.

7. The display apparatus of claim 6 , further comprising:
a first color filter between the first color conversion pattern and the first base substrate; and
a second color filter between the second color conversion pattern and the first base substrate.

8. The display apparatus of claim 1 , wherein the first color conversion pattern further comprises epoxy and/or epoxy-acrylate, and
the first fluorine layer comprises fluorine and/or fluoropolymer.

9. The display apparatus of claim 1 , wherein the first color conversion pattern and the first fluorine layer are in one layer whose boundary is unclear, the one layer having a first portion that is closer to the first base substrate and a second portion that is further from the first base substrate, and
a content of fluorine and/or fluoropolymer in the second portion is larger than that in the first portion.

10. A display apparatus, comprising:
a first base substrate;
a partitioning wall pattern between a first pixel area and a second pixel area and on the first base substrate;
a first color conversion pattern in the first pixel area and comprising quantum dot particles and/or phosphor;
a first fluorine layer on the first color conversion pattern, a fluorine content of the first fluorine layer being higher than that of the first color conversion pattern;
a second color conversion pattern in the second pixel area and comprising quantum dot particles and/or phosphor; and
a hydrophobic layer on the partitioning wall pattern,
wherein an upper surface of the first fluorine layer is higher than an upper surface of the hydrophobic layer on the partitioning wall pattern,
the upper surface of the first fluorine layer is a surface of the first fluorine layer which is facing away from the first base substrate, and
the upper surface of the hydrophobic layer is a surface of the hydrophobic layer which is facing away from the first base substrate.

11. A method of manufacturing a display apparatus, the method comprising:
forming a partitioning wall pattern on a first base substrate between a first pixel area and a second pixel area;
providing a first color conversion inkjet solution comprising quantum dot particles and/or phosphor, a solvent, and a fluorine surfactant;
forming a first color conversion pattern and a first fluorine layer on the first color conversion pattern by curing the first color conversion inkjet solution, an upper surface of the first fluorine layer having a convex shape with respect to the first base substrate;
providing a second color conversion inkjet solution comprising quantum dot particles and/or phosphor in the second pixel area on the first base substrate on which the first fluorine layer is formed; and
forming a second color conversion pattern by curing the second color conversion inkjet solution.

12. The method of claim 11 , wherein the first color conversion pattern comprises red quantum dot particles and/or red phosphor, and epoxy and/or epoxy-acrylate, and
the second color conversion pattern comprises green quantum dot particles and/or green phosphor.

13. The method of claim 12 , further comprising:
before providing the first color conversion inkjet solution, forming a hydrophobic layer on the partitioning wall pattern.

14. The method of claim 13 , wherein a height of the upper surface of the first fluorine layer is higher than an upper surface of the hydrophobic layer from the first base substrate.

15. The method of claim 13 , wherein the method further comprises forming a light blocking pattern on the first base substrate, or wherein the partitioning wall pattern comprises a light blocking material.

16. The method of claim 13 , further comprising:
before providing the first color conversion inkjet solution, forming a first color filter by an inkjet method in the first pixel area and forming a second color filter in the second pixel area.

17. The method of claim 11 , wherein in providing the second color conversion inkjet solution, the second color conversion inkjet solution comprises a solvent and a fluorine surfactant, and
wherein in forming the second color conversion pattern, the second color conversion pattern and a second fluorine layer on the second color conversion pattern are formed by curing the second color conversion inkjet solution, and
wherein a refractive index of the first fluorine layer is lower than that of the first color conversion pattern, and
a refractive index of the second fluorine layer is lower than that of the second color conversion pattern.

18. The method of claim 11 , wherein the forming of the partitioning wall pattern comprises:
forming a partitioning wall layer on the first base substrate;
forming a preliminary hydrophobic layer on the partitioning wall layer; and
forming the partitioning wall pattern and a hydrophobic layer on the partitioning wall pattern by patterning the preliminary hydrophobic layer and the partitioning wall layer.

19. The method of claim 11 , further comprising:
before providing the first color conversion inkjet solution, forming a blue light blocking pattern on the first base substrate in the first pixel area and the second pixel area.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Boram
• Kodaira Taimei
• Park Sangji
• Bae Kwangsoo
• Yun Haeju
• Cho Donchan
• Cho Youngje

Classifications

• G02F1/133345 Primary

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G09G3/3688

  suitable for active matrices only · CPC title

• G02F2001/133548

  Physics · mapped topic