Display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11215859-B2
Application number	US-202016882388-A
Country	US
Kind code	B2
Filing date	May 22, 2020
Priority date	Nov 17, 2017
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

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 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 directly on and covering the first color conversion pattern by stratifying the fluorine surfactant in the first color conversion inkjet solution and curing the first color conversion inkjet solution;
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.

2. The method of claim 1 , 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.

3. The method of claim 2 , further comprising:
before providing the first color conversion inkjet solution, forming a hydrophobic layer on the partitioning wall pattern.

4. The method of claim 3 , wherein a height of an upper surface of the first fluorine layer is higher than an upper surface of the hydrophobic layer from the first base substrate.

5. The method of claim 3 , 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.

6. The method of claim 3 , 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.

7. The method of claim 1 , 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.

8. The method of claim 1 , 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.

9. The method of claim 1 , 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.

10. The method of claim 1 , wherein the first color conversion pattern and the first fluorine layer are formed 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 greater than that in the first portion.

Assignees

• Samsung Display Co Ltd

Inventors

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

Classifications

• G02F1/133617 Primary

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G09G3/3607

  for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127) · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2320/0673

  for control of gamma adjustment, e.g. selecting another gamma curve · CPC title

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title