Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11019743-B2
Application number	US-201916244348-A
Country	US
Kind code	B2
Filing date	Jan 10, 2019
Priority date	Jan 10, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A display device includes: a display panel which is curved and displays an image; a cover window which is disposed on a front surface of the display panel at which the image is displayed; and a cover panel which is curved and disposed on a curved back surface of the display panel opposite to the front surface thereof. The cover panel is defined by a flat cover panel which is curved by attachment thereof to the curved back surface of the display panel, and the flat cover panel which is curved to define the cover panel includes a cutout portion therein recessed from an outer edge of the flat cover panel toward a center of the flat cover panel.

First claim

What is claimed is:

1. A display device comprising:
a display panel which is curved and displays an image;
a cover window which is disposed on a front surface of the display panel at which the image is displayed; and
a cover panel which is curved and disposed on a curved back surface of the display panel opposite to the front surface thereof,
wherein the cover panel is defined by a flat cover panel which is curved by attachment thereof to the curved back surface of the display panel, and
the flat cover panel which is curved to define the cover panel comprises a cutout portion therein recessed from an outer edge of the flat cover panel toward a center of the flat cover panel in a top plan view.

2. The display device of claim 1 , wherein in the top plan view, the cutout portion of the flat cover panel which is curved to define the cover panel comprises:
a first side extending from the outer edge of the flat cover panel toward the center of the flat cover panel,
a second side extending from the outer edge of the flat cover panel toward the center of the flat cover panel, the second side spaced apart from the first side along the outer edge of the flat cover panel, and
a point of contact at which the first and second sides meet proximate to the center of the flat cover panel.

3. The display device of claim 2 , wherein in the top plan view, the point of contact of the cutout portion and the center of the flat cover panel are spaced apart from each other.

4. The display device of claim 2 , wherein in the top plan view, the point of contact of the cutout portion and the center of the flat cover panel coincide with each other.

5. The display device of claim 1 , wherein the display panel comprises in the top plan view:
a display area at which the image is displayed, and
a non-display area which surrounds the display area,
further comprising a printed circuit board which is connected to the display panel at the non-display area thereof.

6. The display device of claim 5 , wherein
a front surface of the cover panel faces the curved back surface of the display panel, and
a portion of the printed circuit board connected to the display panel at the non-display area thereof is disposed along a back surface of the cover panel opposite to the front surface thereof.

7. The display device of claim 1 , wherein the cover panel defined by the flat cover panel which is curved by attachment thereof to the curved back surface of the display panel comprises an adhesive layer, a buffer layer and a dehumidifying layer stacked sequentially in a direction toward the display panel.

8. The display device of claim 7 , wherein a cutout portion is defined in each of the adhesive layer, the buffer layer and the dehumidifying layer and the cutout portions thereof overlap each other to define the cutout portion of the flat cover panel.

9. The display device of claim 1 , wherein the cutout portion of the flat cover panel is provided in a plurality.

10. The display device of claim 9 , wherein the cutout portions of the flat cover panel comprise a first cutout portion and a second cutout portion spaced apart from each other along the outer edge of the flat cover panel.

11. The display device of claim 10 , wherein the display panel comprises in the top plan view:
a display area at which the image is displayed, and
a non-display area which surrounds the display area, the non-display area comprising:
a first area extending directly from the display area to define a maximum dimension of the non-display area in a first direction, and
a second area which protrudes from the first area to dispose the first area between the second area and the display area, a maximum dimension of the second area in the first direction being smaller than that of the first area.

12. The display device of claim 11 , wherein
the flat cover panel which is curved to define the cover panel comprises:
a first portion corresponding to the first area of the non-display area, and
a second portion which protrudes from the first portion to correspond to the second area of the non-display area, and

the second portion of the cover panel protrudes from the first area thereof to overlap the second area of the non-display area.

13. The display device of claim 11 , further comprising:
a printed circuit board which is connected to the display panel, and
a connection portion in the second area of the non-display area, at which the printed circuit board is connected to the display panel,
wherein the second portion of the cover panel protrudes from the first area thereof to overlap the connection portion.

14. The display device of claim 11 , wherein
for the display panel in the top plan view,
the second area having the maximum dimension smaller than that of the first area meets the first area at a first point and a second point spaced apart from each other along the first direction, and
a first reference line is defined connecting the first point and the center of the flat cover panel and a second reference line is defined connecting the second point and the center of the flat cover panel,

the first cutout portion of the flat cover panel is disposed overlapping the first reference line defined for the display panel, and
the second cutout portion of the flat cover panel is disposed overlapping the second reference line defined for the display panel.

15. The display device of claim 14 , wherein
the second portion of the cover panel which protrudes from the first portion thereof to correspond to the second area of the non-display area meets the first portion at a first point of contact and a second point of contact spaced apart from each other along the first direction,
the first point of contact of the cover panel is disposed on the first reference line defined for the display panel, and
the second point of contact of the cover panel is disposed on the second reference line defined for the display panel.

16. The display device of claim 1 , wherein in the top plan view:
the display panel comprises a display area at which the image is displayed, the display area having a circular planar shape,
the flat cover panel which is curved to define the cover panel has a circular planar shape, and
the cutout portion of the flat cover panel having the circular shape is recessed from a circumference of the flat cover panel toward the center of the flat cover panel.

17. The display device of claim 1 , wherein in the top plan view, the cutout portion of the flat cover panel has a fan shape.

18. A method of manufacturing a display device, the method comprising:
preparing a cover window attached to a display surface of a display panel which is curved and displays an image;
disposing a flat cover panel comprising a cutout portion recessed from an outer edge of the flat cover panel toward a center thereof in a top plan view, on a curved back surface of the display panel; and
pressing the flat cover panel to the curved back surface of the display panel to form the display device including a cover panel which is curved along the curved back surface of the display panel and the cover window attached thereto.

19. The method of claim 18 , wherein the pressing of the flat cover panel to form the cover panel curved along the curved back surface of the display panel comprises pressing the flat cover panel to the display panel by rotating a pressure roll in a clockwise direction or a counterclockwise direction about the center of the flat cover panel.

20. The method of claim

Assignees

• Samsung Display Co Ltd

Inventors

• Choi Hyun Woo
• Kwack Jun Ho
• Bang Ji Yun
• Sim Jae Young

Classifications

• H10K59/131

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

• H10K59/871 Primary

  Self-supporting sealing arrangements · CPC title

• H05K5/03 Primary

  Covers · CPC title

• H10K77/111 Primary

  Flexible substrates · CPC title

• G09F9/33 Primary

  being semiconductor devices, e.g. diodes · CPC title