Display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9356050-B2
Application number	US-201414308009-A
Country	US
Kind code	B2
Filing date	Jun 18, 2014
Priority date	Jan 8, 2014
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

A display apparatus includes a substrate; a cavity layer; a display material layer; and a capping layer. The cavity layer includes a plurality of barriers arranged to be spaced apart from one another on the substrate and partitioning pixel regions, and a roof layer connecting upper parts of the plurality of barriers. The cavity layer forms a plurality of cavities including a cavity. The display material layer is formed in the cavity. The capping layer is formed on the cavity layer, the capping layer including a sealant and a plurality of fillers dispersed in the sealant.

First claim

What is claimed is:

1. A display apparatus comprising:
a substrate;
a cavity layer including a plurality of barriers arranged to be spaced apart from one another on the substrate and partitioning pixel regions, and a roof layer connecting upper parts of the plurality of barriers, the cavity layer forming a plurality of cavities comprising a cavity;
a display material layer formed in the cavity;
a pattern mask layer on the cavity layer, the pattern mask layer having a pattern for forming an opening through a certain region of the cavity layer; and
a capping layer formed on the cavity layer and in direct contact with the pattern mask layer, the capping layer including a sealant and a plurality of fillers dispersed in the sealant.

2. The display apparatus of claim 1 , wherein the sealant comprises an acryl-based or epoxy-based polymer material.

3. The display apparatus of claim 2 , wherein a viscosity of the sealant is 30 CP to 10000 CP.

4. The display apparatus of claim 2 , wherein an aspect ratio of the fillers is 50 or more.

5. The display apparatus of claim 1 , wherein the fillers comprises a nanoparticle, a nanowire, or a nanorod, which are nano-sized.

6. The display apparatus of claim 1 , wherein a volume fraction of the fillers contained in the sealant is 0.5% to 5%.

7. The display apparatus of claim 1 , wherein a material of the fillers comprises Ta, Nb, Zr, Th, Ti, Al, Mg, Ba, P, or a getter material.

8. The display apparatus of claim 1 , wherein a common electrode and a pixel electrode that are formed of transparent electrode materials are formed over and under the cavity respectively.

9. The display apparatus of claim 8 , wherein between the substrate and the cavity layer, a transistor configured to drive the pixel electrode and a passivation layer passivating the transistor are formed.

10. The display apparatus of claim 9 , wherein between the passivation layer and the cavity layer, a black matrix faces the barriers and a color filter faces the cavity.

11. The display apparatus of claim 1 , wherein the display material layer comprises a liquid crystal layer or an organic emission layer.

12. A method of manufacturing a display apparatus, the method comprising:
forming a cavity layer including a plurality of barriers arranged to be spaced apart from one another on a substrate and partitioning pixel regions, and a roof layer connecting upper parts of the plurality of barriers, the cavity layer forming a plurality of cavities;
forming a display material layer in the plurality of cavities; and
forming a capping layer on the cavity layer and in direct contact with an exposed region of the cavity layer, the capping layer being formed of a material formed by diffusing a plurality of fillers to a sealant.

13. The method of claim 12 , wherein the sealant comprises an acryl-based or epoxy-based polymer material.

14. The method of claim 12 , wherein a viscosity of the sealant is 30 CP to 1000 CP.

15. The method of claim 12 , wherein the fillers comprises a nanoparticle, nanowire, or nanorod, which is nano-sized.

16. The method of claim 15 , wherein an aspect ratio of the fillers is 50 or more.

17. The method of claim 12 , wherein a volume fraction of the fillers contained in the sealant is 1% to 5%.

18. The method of claim 12 , wherein a material of the fillers comprises Ta, Nb, Zr, Th, Ti, Al, Mg, Ba, or P.

19. The method of claim 12 , wherein the forming of the cavity layer comprises:
forming a sacrificial layer on the substrate, the sacrificial layer having a shape corresponding to the plurality of cavities; and
forming an organic layer on the sacrificial layer and stripping the sacrificial layer.

20. The method of claim 12 , wherein the forming of the display material layer comprises injecting liquid crystals into the plurality of cavities.

Assignees

• Samsung Display Co Ltd

Inventors

• Cha Tae-Woon
• Sung Woo-Yong
• Kim Tae-Gyun
• Lee Hyoung-Sub

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• G02F1/133377 Primary

  Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H01L27/124 Primary

  Electricity · mapped topic