Curved display device manufacturing method

Patent metadata

Field	Value
Publication number	US-12105368-B2
Application number	US-201917630494-A
Country	US
Kind code	B2
Filing date	Jul 29, 2019
Priority date	Jul 29, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

The present invention provides a curved display device manufacturing method comprising the steps of: coupling a flat display, a transparent adhesive layer, and flat cover glass, thereby manufacturing a flat display assembly; applying an adhesive to the edge of the flat display assembly; seating the flat display assembly on a curved jig; adsorbing the flat display assembly onto the surface of the curved jig by using vacuum holes formed in the curved jig such that the flat display assembly is bent; and coupling a backlight unit to the adhesive-applied area. The step of coupling a backlight unit to the adhesive-applied area comprises a step of curing the adhesive in a state in which the backlight unit is forced against the display assembly such that the display assembly remains bent.

First claim

The invention claimed is:

1. A method of manufacturing a curved display device, the method comprising:
coupling a flat display, an optical clear adhesive, and a cover glass to manufacture a flat display assembly;
applying an adhesive to an edge of the flat display assembly;
seating the flat display assembly on a curved jig;
sucking the flat display assembly to a surface of the curved jig using a vacuum hole disposed in the curved jig such that the flat display assembly is bent; and
coupling a backlight unit to a region to which the adhesive is applied,
wherein the coupling of a backlight unit to a region to which the adhesive is applied comprises curing the adhesive while the backlight unit is pressed to the display assembly so as to maintain a bent state of the display assembly,
wherein:
the flat display assembly is seated on the curved jig through a first lift pin coming into contact with a central portion of the flat display assembly and a second lift pin coming into contact with an edge portion of the flat display assembly,
the seating of the flat display assembly on the curved jig comprises lowering the first and second pins until the display assembly comes into contact with an uppermost portion of the curved jig, and
the sucking the flat display assembly to a surface of the curved jig such that the flat display assembly is bent comprises:
stopping descent of the first lift pin when the display assembly comes into contact with the uppermost portion of the curved jig;
forming a vacuum through the vacuum hole disposed in the curved jig; and
descending together the second lift pin with the display assembly according to a bending speed of the display assembly.

2. The method of claim 1 , wherein each of the first and second lift pins comprises a vacuum suction pad that is vacuum-sucked to the display assembly.

3. The method of claim 2 , wherein the seating of the flat display assembly on a curved jig comprises:
seating the flat display assembly on first and second lift pins;
moving the first and second lift pins to the curved jig such that the flat display assembly and the curved jig overlap each other.

4. The method of claim 3 , wherein the sucking of the flat display assembly to a surface of the curved jig is performed while maintaining a suction force of the vacuum suction pad provided in the second lift pin.

5. The method of claim 1 , wherein the curved jig is provided with a plurality of vacuum holes, and
the sucking of the flat display assembly to a surface of the curved jig is performed by depressurizing an inside of the vacuum holes.

6. The method of claim 1 , wherein the coupling of a backlight unit to a region to which the adhesive is applied comprises fixing the display assembly and the backlight unit with a clamp so as to maintain the display assembly in a bent state.

7. The method of claim 1 , further comprising:
fixing the display assembly with a clamp to maintain the display assembly in a bent state after sucking the flat display assembly to a surface of the curved jig.

8. The method of claim 1 , wherein the coupling of the flat display, the optical clear adhesive, and the cover glass to manufacture the flat display assembly is performed by roll lamination.

Assignees

• Lg Electronics Inc

Inventors

• Kim Daehong

Classifications

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02F2201/56

  Substrates having a particular shape, e.g. non-rectangular · CPC title

• G02F1/133305

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

• B32B2605/003

  Interior finishings · CPC title

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title