Display device having bezel pattern and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10775664-B2
Application number	US-201816016954-A
Country	US
Kind code	B2
Filing date	Jun 25, 2018
Priority date	Jul 13, 2017
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

Provided is a display device. The display device includes a display panel including a display area where an image is displayed and a non-display area surrounding the display area, a light blocking layer disposed in the non-display area and on the display panel, and a primer layer disposed between the display panel and the light blocking layer, and configured to planarize the display panel. Thus, it is possible to provide a borderless display device having an excellent appearance with minimized defects in a bezel pattern caused by foreign materials.

First claim

What is claimed is:

1. A display device, comprising:
a display panel including a display area to display an image and a non-display area surrounding the display area;
a light blocking layer disposed in the non-display area and on (he display panel; and
a primer layer disposed between the display panel and the light blocking layer, and configured to planarize the display panel,
wherein the light blocking layer is formed of a cation-curable ink composition,
wherein the primer layer is formed of a radical-curable composition, and
wherein the primer layer is formed in the non-display area of the display panel.

2. The display device according to claim 1 , further comprising:
micro foreign materials each having a size of about 10 nm or less, and disposed between the display panel and the primer layer,
wherein the primer layer fully covers the micro foreign materials.

3. The display device according to claim 1 , wherein the light blocking layer has a thickness of about 1 μm to about 10 μm.

4. The display device according to claim 1 , wherein the cation- curable ink composition includes a colorant, an epoxy-based compound, and a cationic photoinitiator.

5. The display device according to claim 1 , wherein the primer layer has a thickness of about 10 nm to about 200 nm.

6. The display device according to claim 1 , wherein the radical- curable composition includes an acryl-based compound and a radical photoinitiator.

7. A method of manufacturing a display device having a bezel pattern, the method comprising:
preparing a first coating layer by coating a radical-curable primer composition on a non- display area of a substrate;
preparing a primer layer by photo-curing the first coating layer;
preparing a second coating layer by coating a cation-curable ink composition including a colorant on the primer layer; and
preparing a bezel pattern by photo-curing the second coating layer.

8. The method of manufacturing a display device having a bezel pattern according to claim 7 , wherein the primer composition includes an acryl-based compound, a radical photoinitiator, and a solvent.

9. The method of manufacturing a display device having a bezel pattern according to claim 7 , wherein the cation-curable ink composition includes a colorant, an epoxy- based compound, a cationic photoinitiator, and a solvent.

10. The method of manufacturing a display device having a bezel pattern according to claim 9 , wherein the cationic photoinitiator is an iodine salt.

11. The method of manufacturing a display device having a bezel pattern according to claim 9 , wherein micro foreign materials each having a size of 10 nm or less are present on the substrate, and
wherein the primer layer fully covers the micro foreign materials after the photo-curing of the first coating layer.

12. A display device, comprising:
a display panel including a display area to display an image and a non-display area surrounding the display area;
micro foreign materials having a size of about 10 nm or less, and disposed on the display panel;
a primer layer disposed on the display panel to fully cover the micro foreign materials; and
a light blocking layer on the primer layer in the non-display area, and on the display panel,
wherein the light blocking layer is formed of a cation-curable ink composition,
wherein the primer layer is formed of a radical-curable composition, and
wherein the primer layer is formed in the non-display area of the display panel.

13. The display device according to claim 12 , wherein a thickness of the light blocking layer is different from a thickness of the primer layer.

14. The display device according to claim 12 , wherein a thickness of the light blocking layer is greater than a thickness of the primer layer.

15. The display device according to claim 12 , wherein a thickness of the light blocking layer is about 1 μm to about 10 μm, and
wherein a thickness of the primer layer is about 10 nm to about 200 nm.

16. The display device according to claim 12 , wherein the primer layer includes an acryl-based compound, a radical photoinitiator, and a solvent, and
wherein the light blocking layer includes a colorant, an epoxy-based compound, and a cationic photoinitiator.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Sunghee
• Kim Jinwuk

Classifications

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F2202/04

  dye · CPC title

• G02F1/133308 Primary

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F1/3505

  Coatings; Housings; Supports · CPC title

• G02F2201/40

  Arrangements for improving the aperture ratio · CPC title