Bonding apparatus and method of bonding a display device using the same

Patent metadata

Field	Value
Publication number	US-11289686-B2
Application number	US-201916409065-A
Country	US
Kind code	B2
Filing date	May 10, 2019
Priority date	May 11, 2018
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A bonding apparatus includes adhesive sheet that includes a central adhesive portion adhered to a central portion of a first substrate and a bendable adhesive portion that surrounds the central adhesive portion in a plan view and that is adhered to an edge portion of the first substrate that extends from the central portion, a molding member that includes a top surface that overlaps the central portion and a side surface bent from the top surface and that has a curved shape and that supports the adhesive sheet through the top surface, a magnet member disposed on a first display surface of a second substrate that covers the central portion of the first substrate, and pressing balls disposed in the molding member. The pressing balls press fife central adhesive portion and the bendable adhesive portion by forming attractive force with magnet member.

First claim

What is claimed is:

1. A method of bonding a display device, the method, comprising:
providing a substrate that includes a first display surface and a second display surface that surrounds the first display surface and is bent from the first display surface;
adhering a display substrate to a front surface of an adhesive sheet, wherein the display substrate includes a central portion and an edge portion that extends from the central portion and surrounds the central portion in a plan view, and wherein the adhesive sheet includes a central adhesive portion that overlaps the central portion and a bendable adhesive portion that overlaps the edge portion;
disposing a molding member under the adhesive sheet, wherein the molding member includes a plurality of pressing balls and supports the adhesive sheet, wherein the pressing balls include a magnetic fluid that includes a ferromagnetic material;
bending the bendable adhesive portion along a side surface of the molding member using a moving member coupled to the bendable adhesive portion;
inserting the display substrate into a space surrounded by the second display surface;
pressing the central adhesive portion with the pressing balls, wherein the pressing is controlled by a magnet member disposed on the substrate; and
pressing the bendable adhesive portion with the pressing balls controlled by the magnet member, wherein the magnet member turns an attractive force with the pressing balls.

2. The method of claim 1 , wherein the bendable adhesive portion comprises:
a first side adhesive portion and a second side adhesive portion spaced apart from each other in a first direction with the central adhesive portion interposed therebetween; and
a third side adhesive portion and a fourth side adhesive portion spaced apart from each other in a second direction that intersects the first direction with the central adhesive portion interposed therebetween.

3. The method of claim 2 , wherein bending the bendable adhesive portion comprises:
bending the first side adhesive portion and the second side adhesive portion; and
bending the third side adhesive portion and the fourth side adhesive portion.

4. The method of claim 2 , wherein the bendable adhesive portion further comprises:
a first corner adhesive portion disposed between the first side adhesive portion and the third side adhesive portion and cut from the first side adhesive portion and the third side adhesive portion, respectively;
a second corner adhesive portion disposed between the first side adhesive portion and the fourth side adhesive portion and cut from the first side adhesive portion and the fourth side adhesive portion, respectively;
a third corner adhesive portion disposed between the second side adhesive portion and the third side adhesive portion and cut from the second side adhesive portion and the third side adhesive portion, respectively; and
a fourth corner adhesive portion disposed between the second side adhesive portion and the fourth side adhesive portion and cut from the second side adhesive portion and the fourth side adhesive portion, respectively.

5. The method of claim 4 , wherein bending the bendable adhesive portion farther comprises: bending the first to fourth corner adhesive portions.

6. The method of claim 4 ,
wherein the magnet member comprises a plurality of magnets disposed adjacent to each corner of the substrate, and
wherein pressing the central adhesive portion with the pressing balls comprises: moving each of the plurality of magnets toward a respective one of the first to fourth corner adhesive portions.

7. The method of claim 2 ,
wherein the magnet member comprises a first magnet and a second magnet,
wherein pressing the central adhesive portion with the pressing balls comprises:
moving the first magnet toward the first side adhesive portion from a central portion of the first display surface; and
moving the second magnet toward the second side adhesive portion from the central portion of the first display surface; and

wherein pressing the bendable adhesive portion with the pressing balls comprises:
moving the first magnet onto the first side adhesive portion, and
moving the second magnet onto the second side adhesive portion.

8. The method of claim 2 ,
wherein the magnet member comprises a first magnet and a second magnet, and
wherein pressing the central adhesive portion with the pressing balls comprises:
moving the first magnet toward to the third side adhesive portion from the central portion of the first display surface; and
moving the second magnet toward to the fourth side adhesive portion from the central portion of the first display surface.

9. The method of claim 1 , further comprising:
adhering an adhesive member to a front surface of the display substrate,
wherein the pressing balls press the adhesive sheet using the attractive force with the magnet member, such that the adhesive member is adhered to the substrate.

10. The method of claim 1 , wherein the molding member comprises:
a pocket that overlaps the first display surface and that is filled with the pressing balls; and
a plurality of guides spaced apart from each other in, a plan view and coupled to corners of the pocket, respectively,
wherein side surfaces of the guides, which face the second display surface, are curved, wherein the second display surface, the edge portion and the side surfaces of the guides have the same curvature.

11. The method of claim 1 , wherein the first display surface is curved.

12. A method of bonding a display device, the method, comprising:
adhering an adhesive sheet to first surface of a display substrate, wherein the display substrate includes a central portion, an edge portion that extends from the central portion and surrounds the central portion in a plan view, and a second surface opposite the first surface, and wherein the adhesive sheet includes a central adhesive portion that overlaps the central portion and a bendable adhesive portion that overlaps the edge portion;
bending the bendable adhesive portion along a side surface of a molding member disposed under the adhesive sheet using a moving member coupled to the bendable adhesive portion, wherein the molding member includes magnetic pressing balls;
inserting the display substrate into a space under a window member that is formed by bent edge surfaces of the window member;
disposing a magnet member that includes a first magnet and a second magnet over the window member;
adhering the second surface of the display substrate to the window member by moving the first magnet from a central portion of the window member toward an edge of the window member; and
moving the second magnet from the central portion of the window member toward an opposite edge of the window member, wherein each of the first and second magnets forms an attractive force with the magnetic pressing balls.

13. The method of claim 12 , wherein
the magnet member further comprises a third magnet and a fourth magnet, and
adhering the second surface of the display substrate to the window member further comprises moving each of the first to fourth magnets toward a respective corner of the window member.

Assignees

• Samsung Display Co Ltd

Inventors

• Jung Sukwon
• Nam Seokhyun
• Park Jongdeok

Classifications

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• B29C66/301

  Three-dimensional joints, i.e. the joined area being substantially non-flat (B29C66/5223, B29C66/5224, B29C66/5225 take precedence) · CPC title

• B29C66/816

  characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps · CPC title