Curved display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10133100-B2
Application number	US-201615200034-A
Country	US
Kind code	B2
Filing date	Jul 1, 2016
Priority date	Dec 4, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A curved display device includes a display panel which is curved with respect to a central axis of the curved display device to define a display surface which is curved with respect to the central axis of the curved display device; a first adhesion member attached to an edge area of a bottom surface of the display panel; a mold frame which is curved with respect to the central axis of the curved display device, the mold frame defining a stepped portion on which the display panel is seated; and a second adhesion member attached to a top surface of the stepped portion and to the first adhesion member which is attached to the edge area of the bottom surface of the display panel.

First claim

What is claimed is:

1. A curved display device comprising:
a display panel which is curved with respect to a central axis of the curved display device to define a display surface which is curved with respect to the central axis of the curved display device;
a first adhesion member attached to an edge area of a bottom surface of the display panel;
a mold frame which is curved with respect to the central axis of the curved display device, the mold frame defining a stepped portion on which the display panel is seated; and
a second adhesion member directly attached to a top surface of the stepped portion and to the first adhesion member which is attached to the edge area of the bottom surface of the display panel.

2. The curved display device of claim 1 , wherein
the display panel comprises:
a first display substrate; and
a second display substrate disposed on the first display substrate, and

the first adhesion member is attached to an edge area of a bottom surface of the first display substrate of the display panel.

3. The curved display device of claim 2 , wherein the first adhesion member comprises in order from the display panel:
a first adhesion layer attached to the bottom surface of the first display substrate of the display panel;
a first foam layer attached to a bottom surface of the first adhesion layer;
a first base film layer attached to a bottom surface of the first foam layer; and
a second adhesion layer attached to a bottom surface of the first base film layer.

4. The curved display device of claim 3 , wherein the second adhesion member comprises in order from the stepped portion of the mold frame:
a third adhesion layer attached to the top surface of the stepped portion;
a second foam layer attached to a top surface of the third adhesion layer;
a second base film layer attached to a top surface of the second foam layer; and
a fourth adhesion layer attached to a top surface of the second base film layer and to the second adhesion layer of the first adhesion member.

5. The curved display device of claim 2 , wherein the edge area of the bottom surface of the first display substrate of the display panel overlaps a portion of the top surface of the stepped portion of the mold frame.

6. The curved display device of claim 1 , wherein
the display panel comprises: a display area in which pixels are disposed and an image is displayed, and a non-display area in which the image is not displayed, and
the mold frame defines an opening thereof which corresponds to the display area of the display panel, and the stepped portion of the mold frame defines and surrounds the opening thereof.

7. The curved display device of claim 1 , wherein each of the first and second adhesion members is a double-sided adhesion tape.

8. The curved display device of claim 1 , wherein
the stepped portion of the mold frame is curved with respect to the central axis of the curved display device, and
the display panel which is curved with respect to the central axis of the curved display device is seated on the stepped portion of the mold frame which is curved with respect to the central axis of the curved display device.

9. A method for manufacturing a curved display device, the method comprising:
disposing a display panel which is configured to display an image, in a flat state,
attaching a first adhesion member along an edge area of a bottom surface of the flat-state display panel;
attaching a second adhesion member to a top surface of a stepped portion of a mold frame, the mold frame curved with respect to a central axis of the curved display device;
with the first adhesion member and the second adhesion member respectively attached to the flat-state display panel and to the curved mold frame, aging each of the first adhesion member and the second adhesion member to increase an adhesion force thereof with respect to the flat-state display panel and to the curved mold frame;
with the aged first adhesion member attached to the flat-state display panel, bending the flat-state display panel to define the display panel and a display surface thereof curved with respect to the central axis of the curved display device; and
coupling the curved display panel to the curved mold frame by attaching the first adhesion member and the second adhesion member to each other, to form the curved display device.

10. The method of claim 9 , wherein the first adhesion member comprises in order from the display panel:
a first adhesion layer attached to the bottom surface of the display panel;
a first foam layer attached to a bottom surface of the first adhesion layer;
a first base film layer attached to a bottom surface of the first foam layer; and
a second adhesion layer attached to a bottom surface of the first base film layer.

11. The method of claim 10 , wherein the second adhesion member comprises in order from the stepped portion of the mold frame:
a third adhesion layer attached to the top surface of the stepped portion;
a second foam layer attached to a top surface of the third adhesion layer;
a second base film layer attached to a top surface of the second foam layer; and
a fourth adhesion layer attached to a top surface of the second base film layer and the second adhesion layer.

12. The method of claim 11 , wherein
the first adhesion member further comprises a first protective layer disposed on a bottom surface of the second adhesion layer, and
the method further comprises separating the first protective layer from the bottom surface of the second adhesion layer before the attaching the first adhesion member and the second adhesion member to each other in the coupling of the curved display panel to the curved mold frame.

13. The method of claim 11 , wherein
the second adhesion member further comprises a second protective layer disposed on a top surface of the fourth adhesion layer, and
the method further comprises separating the second protective layer from a top surface of the fourth adhesion layer before the attaching the first adhesion member and the second adhesion member to each other in the coupling of the curved display panel to the curved mold frame.

14. The method of claim 9 , wherein
the display panel comprises a display area in which pixels are disposed and an image is displayed, and a non-display area in which the image is not displayed, and
the mold frame defines an opening thereof which corresponds to the display area of the display panel, and the stepped portion of the mold frame surrounds the opening thereof.

15. The method of claim 9 , wherein the stepped portion of the mold frame is curved with respect to the central axis of the curved display panel, and
the attaching the first adhesion member and the second adhesion member to each other comprises seating the curved display panel on the curved stepped portion of the mold frame in the coupling of the curved display panel to the curved mold frame.

Assignees

• Samsung Display Co Ltd

Inventors

• Song Sijoon
• Kwon Yong-Hoon
• La Sojeong
• Nam Seokhyun
• Choi Kwang-Wook

Classifications

• G02B6/00

  Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings · CPC title

• G02B6/0068

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02F1/133305 Primary

  Flexible substrates, e.g. plastics, organic film · CPC title

• G02B6/0051

  Diffusing sheet or layer · CPC title