Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11017716-B2
Application number	US-201916377690-A
Country	US
Kind code	B2
Filing date	Apr 8, 2019
Priority date	Apr 11, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A display device and a method of manufacturing a display device are provided. A display device may include: a display panel including a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area; a driving circuit chip on the second area of the display panel; a flexible printed circuit board on the second area of the display panel and spaced apart from the driving circuit chip; and a bending protection layer including a first pre-formed bending protection layer covering a portion of the flexible printed circuit board, and a first post-formed bending protection layer covering the bending area of the display panel.

First claim

What is claimed is:

1. A display device comprising:
a display panel comprising a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area;
a driving circuit chip on the second area of the display panel;
a flexible printed circuit board on the second area of the display panel and spaced apart from the driving circuit chip in a direction away from the bending area; and
a bending protection layer comprising a first pre-formed bending protection layer covering a portion of the flexible printed circuit board, and a first post-formed bending protection layer covering the bending area of the display panel,
wherein the first pre-formed bending protection layer does not overlap the driving circuit chip in a plan view.

2. The display device of claim 1 , wherein the first post-formed bending protection layer comprises a same material as that of the first pre-formed bending protection layer.

3. A display device comprising:
a display panel comprising a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area;
a driving circuit chip on the second area of the display panel;
a flexible printed circuit board on the second area of the display panel and spaced apart from the driving circuit chip; and
a bending protection layer comprising a first pre-formed bending protection layer covering a portion of the flexible printed circuit board, and a first post-formed bending protection layer covering the bending area of the display panel,
wherein the first pre-formed bending protection layer comprises a photo-curable material, and
wherein the first post-formed bending protection layer comprises a thermo-curable material.

4. The display device of claim 1 , wherein a hardness of the first pre-formed bending protection layer is greater than a hardness of the first post-formed bending protection layer.

5. The display device of claim 1 , wherein the first post-formed bending protection layer covers the driving circuit chip.

6. The display device of claim 1 , wherein the first pre-formed bending protection layer covers the driving circuit chip.

7. The display device of claim 1 , wherein the bending protection layer further comprises a second pre-formed bending protection layer on the first area of the display panel.

8. A display device comprising:
a display panel comprising a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area;
a driving circuit chip on the second area of the display panel;
a flexible printed circuit board on the second area of the display panel and spaced apart from the driving circuit chip; and
a bending protection layer comprising a first pre-formed bending protection layer covering a portion of the flexible printed circuit board, and a first post-formed bending protection layer covering the bending area of the display panel,
wherein the bending protection layer further comprises a second pre-formed bending protection layer on the first area of the display panel, and
wherein the bending protection layer further comprises:
a third pre-formed bending protection layer on the second area of the display panel and spaced apart from the first pre-formed bending protection layer with the driving circuit chip therebetween; and
a second post-formed bending protection layer between the first pre-formed bending protection layer and the third pre-formed bending protection layer and covering the driving circuit chip.

9. The display device of claim 8 , wherein a height of the first pre-formed bending protection layer is lower than a height of the third pre-formed bending protection layer.

10. The display device of claim 9 , wherein a height of the second post-formed bending protection layer is lower than a height of the first post-formed bending protection layer.

11. The display device of claim 7 , further comprising a protective film opposite to the bending protection layer with the display panel therebetween and comprising an opening portion corresponding to the bending area of the display panel.

12. The display device of claim 11 , wherein the second pre-formed bending protection layer overlaps an end of the protective film which is exposed by the opening portion in a plan view.

13. The display device of claim 1 , wherein an upper surface of the first post-formed bending protection layer is flat.

14. The display device of claim 1 , wherein the first post-formed bending protection layer comprises a first layer on the display panel and a second layer on the first layer and comprising a different material from that of the first layer.

15. The display device of claim 1 , further comprising a polarization plate on the first area of the display panel, and
wherein the bending protection layer is in contact with the polarization plate.

16. A method of manufacturing a display device, the method comprising:
forming a display panel comprising a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area;
attaching a driving circuit chip on the second area of the display panel;
attaching a flexible printed circuit board spaced apart from the driving circuit chip in a direction away from the bending area on the second area of the display panel;
forming a pre-formed bending protection layer covering a portion of the flexible printed circuit board; and
forming a post-formed bending protection layer covering the bending area of the display panel,
wherein the pre-formed bending protection layer does not overlap the driving circuit chip in a plan view.

17. A method of manufacturing a display device, the method comprising:
forming a display panel comprising a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area;
attaching a driving circuit chip on the second area of the display panel;
attaching a flexible printed circuit board spaced apart from the driving circuit chip on the second area of the display panel;
forming a pre-formed bending protection layer covering a portion of the flexible printed circuit board; and
forming a post-formed bending protection layer covering the bending area of the display panel,
wherein forming the pre-formed bending protection layer comprises:
coating a photo-curable material on the second area of the display panel and the portion of the flexible printed circuit board; and
pre-curing the photo-curable material with an ultraviolet light.

18. The method of claim 17 , wherein forming the post-formed bending protection layer comprises:
coating a thermo-curable material on the bending area of the display panel; and
curing the thermo-curable material with heat.

19. The method of claim 16 , wherein forming the post-formed bending protection layer is performed after forming the pre-formed bending protection layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Sung Hoon

Classifications

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/873

  Encapsulations · CPC title

• G09G3/3225 Primary

  using an active matrix · CPC title

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title