Display apparatus including a plurality of banks and a method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10892309-B2
Application number	US-202016793842-A
Country	US
Kind code	B2
Filing date	Feb 18, 2020
Priority date	Apr 17, 2019
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A display apparatus is provided including a first substrate on which a plurality of organic light-emitting diodes are arranged. A second substrate is bonded to the first substrate. The second substrate includes a plurality of light control units respectively corresponding to the plurality of organic light-emitting diodes and a plurality of banks arranged between the plurality of light control units. The plurality of banks include a first bank having a deflection arrangement structure in which a fluorine-containing polymer is concentrated on a surface of a side of the first bank, and a second bank that does not have a deflection arrangement structure in which the fluorine-containing polymer is deflectively arranged.

First claim

What is claimed is:

1. A display apparatus, comprising:
a first substrate on which a plurality of organic light-emitting diodes are arranged; and
a second substrate bonded to the first substrate, wherein the second substrate comprises a plurality of light control units respectively corresponding to the plurality of organic light-emitting diodes and a plurality of banks arranged between the plurality of light control units,
wherein the plurality of banks comprise:
a first bank having a deflection arrangement structure in which a fluorine-containing polymer is concentrated on a surface of a side of the first bank; and
a second bank that does not have a deflection arrangement structure in which the fluorine-containing polymer is deflectively arranged.

2. The display apparatus of claim 1 , wherein the fluorine-containing polymer in the first bank is deflectively arranged on the surface of the side of the first bank which is opposite to the second substrate.

3. The display apparatus of claim 1 , wherein the fluorine-containing polymer comprises perfluoropolyether (PFPE).

4. The display apparatus of claim 1 , wherein the surface of the side on which the fluorine-containing polymer is deflectively arranged is liquid-repellent.

5. The display apparatus of claim 1 , wherein
the second bank is comprised of perfluoropolyether (PFPE), acryl, silicon, and/or epoxy.

6. The display apparatus of claim 1 , further comprising a coating layer on a surface of the second bank corresponding to the surface of the side of the first bank.

7. The display apparatus of claim 6 , wherein the coating layer comprises a liquid-repellent material.

8. The display apparatus of claim 1 , further comprising a thin-film encapsulation layer covering the plurality of organic light-emitting diodes.

9. The display apparatus of claim 1 , wherein the plurality of organic light-emitting diodes all generate blue light.

10. The display apparatus of claim 1 , wherein the plurality of light control units comprise a quantum-dot thin-film layer configured to change a color of light generated from the plurality of organic light-emitting diodes and/or a color filter layer configured to increase color purity of the light.

11. A method of manufacturing an organic light-emitting display apparatus, comprising:
forming a plurality of organic light-emitting diodes on a first substrate;
forming a plurality of color filter layers respectively corresponding to the plurality of organic light-emitting diodes on a second substrate;
forming a plurality of first banks at positions between the plurality of color filter layers on the second substrate;
repairing damaged first banks by forming second banks at positions where the first banks are damaged;
forming a quantum-dot thin-film layer on the plurality of color filter layers; and
bonding the first substrate to the second substrate.

12. The method of claim 11 , wherein the forming of the plurality of first banks comprises coating the second substrate with a composite polymer, wherein the composite polymer includes a fluorine-containing polymer and a non-fluorine-containing polymer; and
arranging the fluorine-containing polymer on surfaces of the plurality of first banks by heating the composite polymer, and leaving the composite polymer at the positions between the plurality of color filter layers by patterning the composite polymer.

13. The method of claim 12 , wherein the fluorine-containing polymer comprises perfluoropolyether (PFPE).

14. The method of claim 12 , further comprising forming a liquid-repellent coating layer on a surface of the second bank corresponding to the surfaces of the plurality of first banks.

15. The method of claim 11 , wherein the forming of the second bank comprises arranging a mask, in which an opening is formed, on the second substrate, and injecting a material of the second bank in the opening.

16. The method of claim 15 , wherein the injecting of the material of the second bank comprises:
melting the material of the second bank into the opening by irradiating the material of the second bank with a laser beam, or
extruding the material of the second bank into the opening by pressing the material of the second bank.

17. The method of claim 15 , wherein the material of the second bank comprises perfluoropolyether (PFPE), acryl, silicon and/or epoxy.

18. The method of claim 11 , wherein the plurality of organic-light emitting diodes generate blue light, and
wherein the quantum-dot thin-film layer is formed at a position where the color of the blue light is to be changed.

19. The method of claim 11 , wherein the quantum-dot thin-film layer changes a color of the light generated by an organic light-emitting diode of the plurality of organic light-emitting diodes, and the plurality of color filter layers increase color purity of the light.

20. The method of claim 11 , further comprising a thin-film encapsulation layer covering the plurality of organic light-emitting diodes.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Taehoon
• Kim Minjae
• Kim Minhee
• Park Kyunghae
• Park Keunwoo
• Park Joonhyung
• Yang Danbi
• Yu Hanjun
• Youn Dokyung
• Lee Changhun

Classifications

• H10K59/122

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

• H10K59/38 Primary

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

• H10K50/115 Primary

  comprising active inorganic nanostructures, e.g. luminescent quantum dots · CPC title

• H01L51/502

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic