Laminating apparatus, flexible display panel and assembling method thereof, flexible display apparatus

Patent metadata

Field	Value
Publication number	US-11745489-B2
Application number	US-202017056376-A
Country	US
Kind code	B2
Filing date	Mar 17, 2020
Priority date	Apr 12, 2019
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A laminating apparatus for laminating an object to be laminated includes: a rigid substrate, and a jig provided on a side of the rigid substrate and in contact therewith. The jig is of an elastic material, and a surface of the jig away from the rigid substrate is a first surface. A horizontal plane at any point in a surface of the rigid substrate away from the jig is a first reference plane, and a contact interface between the rigid substrate and the jig is a second surface. For any one of the at least one segment of cambered surface, a distance between the second surface and the first reference plane increases as a non-obtuse angle between a tangent of the first surface and the horizontal direction increases.

First claim

What is claimed is:

1. A laminating apparatus for laminating an object to be laminated, wherein the laminating apparatus comprises:
a rigid substrate; and
a jig provided on a side of the rigid substrate and in contact therewith, the jig being of an elastic material, and a surface of the jig away from the rigid substrate being a first surface; wherein
the laminating apparatus has a bent section, and a portion of the first surface located in the bent section includes at least one segment of cambered surface; a non-obtuse angle between a tangent of any one of the at least one segment of cambered surface and a horizontal direction increases gradually from an end of the segment of cambered surface to an opposite end of the segment of cambered surface;
a horizontal plane at any point in a surface of the rigid substrate away from the jig is a first reference plane, and a contact interface between the rigid substrate and the jig is a second surface;
for any one of the at least one segment of cambered surface, a distance between the second surface and the first reference plane increases as the non-obtuse angle between the tangent of the first surface and the horizontal direction increases; and
a portion of the second surface located in the bent section is in a shape of multiple steps; and a thickness of the jig corresponding to a step is:

L
⁢
i

=

H
·
E
·
Di
·

cos

⁢

α
⁢
i

F
⁢
i

;

wherein Fi represents a force exerted by the laminating apparatus on the object in the normal direction of the first surface and meets 0.3 Mpa≤Fi≤0.9 Mpa; H represents a displacement of a surface of the object proximate to the jig relative to a surface of the object away from the jig; E represents an elastic modulus of the jig; Di represents an area of an orthographic projection of a surface of the step on a second reference plane, the surface of the step being perpendicular to the direction in which the rigid substrate exerts the force on the jig, and the second reference plane being perpendicular to the direction in which rigid substrate exerts the force on the jig; and αi represents an angle between the direction in which the rigid substrate exerts the force on the jig and the normal direction of the first surface, and meets 0°≤αi≤90°.

2. The laminating apparatus according to claim 1 , wherein a positive pressure Fi exerted by the laminating apparatus on the object to be laminated in a normal direction of the first surface satisfies following equation:
Fi=fi • cosα i;

wherein fi represents a force exerted on the jig by the rigid substrate, and αi represents an angle between a direction in which the rigid substrate exerts the force on the jig and the normal direction of the first surface.

3. The laminating apparatus according to claim 1 , wherein
for any one of the at least one segment of cambered surface, directions in which the rigid substrate exerts the force on the jig at various positions are the same.

4. The laminating apparatus according to claim 1 , wherein the laminating apparatus further has a non-bent section, and a portion of the first surface located in the non-bent section and a portion of the second surface located in the non-bent section are both flat surfaces parallel to the horizontal plane.

5. The laminating apparatus according to claim 4 , wherein the at least one segment of cambered surface includes a first segment of sub-cambered surface and a second segment of sub-cambered surface, the first segment of sub-cambered surface being mirror symmetrical to the second segment of sub-cambered surface, a flat surface in the first surface being disposed between the first segment of sub-cambered surface and the second segment of sub-cambered surface, and being directly connected with the first segment of sub-cambered surface and the second segment of sub-cambered surface respectively;
wherein an intersection line of the first segment of sub-cambered surface and the flat surface is a first intersection line, and a non-obtuse angle between a tangent of the first segment of sub-cambered surface and the horizontal direction increases gradually from the first intersection line to an end of the first segment of sub-cambered surface opposite to the first intersection line.

6. The laminating apparatus according to claim 5 , wherein a thickness of a portion of the jig located in the non-bent section is greater than a thickness of a portion of the jig located in the bent section.

7. The laminating apparatus according to claim 4 , wherein a hardness of the portion of the jig located in the non-bent section is less than a hardness of the portion of the jig located in the bent section.

8. The laminating apparatus according to claim 1 , wherein the jig bulges from a side thereof away from the rigid substrate.

9. The laminating apparatus according to claim 1 , wherein the first surface is arch-shaped.

10. The laminating apparatus according to claim 1 , wherein the direction in which the rigid substrate exerts the force on the jig is a vertical direction.

11. The laminating apparatus according to claim 1 , wherein the surface of the rigid substrate away from the jig is flat.

12. The laminating apparatus according to claim 1 , wherein
the elastic material of the jig includes a hyperelastic material.

13. The laminating apparatus according to claim 1 , wherein
the jig is of at least one of silicone or rubber.

14. The laminating apparatus according to claim 1 , wherein
the rigid substrate is of at least one of glass or metal.

15. An assembling method of a flexible display panel, comprising:
placing an array substrate and a counter substrate aligned in cell, a transparent adhesive layer and a light-transmitting cover plate in sequence on a first surface of the laminating apparatus according to claim 1 , a surface of the array substrate away from the light-transmitting cover plate being in contact with and bonded to the first surface; and
exerting, by the laminating apparatus, a force on the array substrate and the counter substrate aligned in cell, the transparent adhesive layer, and the light-transmitting cover plate, until the array substrate and the counter substrate aligned in cell, the transparent adhesive layer, and the light-transmitting cover plate are laminated together.

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Liu Xingguo
• Qing Wei

Classifications

• H10P72/00

  Handling or holding of wafers, substrates or devices during manufacture or treatment thereof · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• B32B37/10 Primary

  characterised by the pressing technique, e.g. using action of vacuum or fluid pressure · CPC title

• B32B3/04

  characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material} · CPC title