KR102221754B1 - Lamination device with dynamic hydraulic pad for pressure control of the mounting surface - Google Patents

Abstract

The present invention relates to a lamination device having a dynamic hydraulic pad which can the control pressure on a mounting surface, capable of allowing a flexible display panel to be smoothly laminated without bubbles or rubbing even for a window cover having a bent portion whose end is sharply bent at right angles of 90 degrees or more. The present invention includes a hydraulic pad for a lamination device having a fluid chamber into which a fluid is injected and capable of adjusting pressure applied to the display panel while varying the degree of expansion according to the amount of fluid injected into the fluid chamber.

Description

Lamination device equipped with a dynamic hydraulic pad capable of controlling the pressing force of the mounting surface {LAMINATION DEVICE WITH DYNAMIC HYDRAULIC PAD FOR PRESSURE CONTROL OF THE MOUNTING SURFACE}

The present invention relates to a lamination device for a display, and in particular, for a window cover having a bent portion sharply bent at a right angle of 90 degrees or more, a flexible display panel can be smoothly laminated without bubbles or chafing. It relates to a lamination apparatus having a dynamic hydraulic pad capable of controlling a pressing force.

Currently, displays are applied to all portable devices such as smartphones and tablet PCs.

In particular, unlike conventional displays, displays with bent ends have been further developed in recent years, and displays with sharply bent ends are expected to be commercialized sooner or later. If you go one step further, the development of a display that is bent more sharply than 90 degrees can be expected. In this case, as image output can be performed on the side as well, convenience and a sense of grip are revived, and the user has the advantage of being able to obtain various different information according to the viewing direction.

However, in order to realize such a display, there is a problem of laminating a flexible display panel on the vertical window cover shown in FIG. 2. As shown in FIG. 1, when the lamination process is performed using a lamination apparatus of the prior art consisting of a pad 10, a pad support 20, a pressing member 30, and a panel support 40 having elasticity, the lamination process is shown in FIG. As shown in FIG. 4, when a micro bubble phenomenon occurs in which air is filled in the bent portions of the window cover, or when the pressure pressed by the pad and the spreading and speed of the flexible display panel do not match, a partial friction phenomenon occurs as shown in FIG. 4. This problem can be said to be a problem that must be solved as it leads to defects in the process of upgrading the display, resulting in process loss that incurs more manufacturing costs.

Korean Patent Application Publication No. 2015-0038449 (2015.04.08.)

Accordingly, the present invention has been proposed in order to solve the problems of the related art as described above, and an object of the present invention is to form a flexible display panel with a bubble or even for a window cover having a bent portion sharply bent at a right angle of 90 degrees or more. It is to provide a lamination device having a dynamic hydraulic pad capable of controlling the pressing force of the mounting surface so that lamination can be smoothly performed without friction.

In order to achieve the above object, the hydraulic pad for a lamination device according to the technical idea of the present invention is a hydraulic pad for a lamination device for laminating the window cover and the flexible display panel by pressing the flexible display panel against the window cover. A fluid chamber into which a fluid is injected into the fluid chamber is provided to adjust the pressing force on the display panel while varying the degree of expansion according to the injection amount of the fluid injected into the fluid chamber.

Here, an opening for fluid injection may be formed on a lower surface of the hydraulic pad.

In addition, even if the thickness of the fluid chamber wall is differentially formed according to the portion, even if the injection amount of the fluid injected into the fluid chamber is the same, the degree of expansion and the pressing force on the display panel can be differentially formed. have.

In addition, a first pressing unit, a second pressing unit, and a third pressing unit sequentially press the flexible display panel against the window cover in the central region of the upper surface, the region between the upper surface center and the corner, the corner region, and the side region of the hydraulic pad. It may be characterized by forming a pressing portion and a fourth pressing portion.

In addition, the upper surface of the hydraulic pad is formed in a rounded curved surface gradually lowering from the center to the corner, and the wall thickness gradually decreases from the first pressurization unit to the third pressurization unit, and then the third pressurization unit is a starting point. While being bent, the wall thickness may be gradually increased toward the lower side of the fourth pressing unit.

In addition, it may be characterized in that the third pressing portion protrudes most outward from the side surface and is formed to be inclined in a shape that is gathered inward toward a lower side of the fourth pressing portion.

In addition, the upper surface of the hydraulic pad is formed in a rounded curved surface gradually lowering from the center to the corner, and the wall thickness gradually increases from the first pressing unit to the third pressing unit, and then the third pressing unit is the starting point. While being bent, it may be characterized in that the wall thickness is formed further toward the lower side of the fourth pressing part.

In addition, it may be characterized in that the third pressing portion protrudes most outward from the side surface and is formed to be inclined in a shape that is gathered inward toward a lower side of the fourth pressing portion.

In addition, the upper surface of the hydraulic pad is formed as a rounded curved surface gradually lowering from the center to the corner, and the wall thickness is formed equally from the first pressing unit to the third pressing unit, and then the third pressing unit is bent. As the wall becomes thicker toward the lower side of the fourth pressing unit, it may be characterized in that it is formed.

In addition, it may be characterized in that the outer surface from the third pressing portion to the lower side of the fourth pressing portion is formed as a vertical surface.

Meanwhile, the lamination apparatus according to the present invention is a lamination apparatus for laminating the window cover and the flexible display panel by pressing the flexible display panel against the window cover, and is characterized in that it includes the hydraulic pad described above.

Here, the hydraulic pad; And a pad support joined to a lower end of the hydraulic pad to support the hydraulic pad and having a fluid injection hole for injecting and recovering fluid into the fluid chamber of the hydraulic pad.

In addition, a protrusion protruding along an outer circumference is formed at the lower end of the hydraulic pad, and is fastened to the pad support by a fastening member with the protrusion of the hydraulic pad interposed between the protrusion of the hydraulic pad on the upper surface of the protrusion of the hydraulic pad to fix the hydraulic pad. It may be characterized in that it further comprises a pad holder.

On the other hand, the lamination system according to the present invention, the lamination device described above; A fluid pump supplying fluid to the hydraulic pad through the fluid injection hole of the lamination device; And a controller for controlling the fluid pump to control the amount of fluid injected into the fluid chamber.

On the other hand, the hydraulic pad manufacturing method according to the present invention is characterized in its technical configuration in that the hydraulic pad is injection-molded in a mold into a pair of divided semi-body, and then a pair of injection-molded semi-body are joined. .

Here, the hydraulic pad is injection-molded into a single body, and a split-type outer mold is formed in which the outer shape of the hydraulic pad is molded, and the molded hydraulic pad is taken out, and the split-type external mold is installed inside the split-type external mold. As a result, it may be injection-molded by an inner mold that forms a fluid chamber of the hydraulic pad.

In addition, the hydraulic pad manufacturing apparatus according to the present invention is characterized in that it includes a mold for injection-molding the semi-body of the single top in order to manufacture the hydraulic pad.

In addition, in order to manufacture a hydraulic pad, the hydraulic pad manufacturing apparatus according to the present invention includes a split-type external mold that is divided into the shape of the hydraulic pad and then the molded hydraulic pad can be taken out, and the split-type external mold It is characterized in that it comprises an inner mold installed in the inside of the hydraulic pad to form a fluid chamber of the hydraulic pad.

The lamination device according to the present invention uses a hydraulic pad that has a fluid chamber into which fluid is injected, so that the pressing force of the mounting portion with respect to the window cover can be adjusted by the relative movement toward the window cover and the fluid injection amount of the fluid chamber. The flexible display panel can be smoothly laminated even to a window cover having a bent portion where the end is bent at a right angle of 90 degrees or more sharply.

Accordingly, according to the present invention, it is possible to easily manufacture a display in which image output is performed from the side, so that convenience and a sense of grip are revived, and various other information can be obtained according to the direction of view of the user, and thus the implementation of a smart device can be accelerated.

1 is a configuration diagram of a lamination device according to the prior art
2 is a perspective view of a window cover formed with a bent portion at a right angle of 90
3 and 4 are reference diagrams for explaining a state in which a bubble shape and a friction phenomenon occur during a lamination process due to the use of a lamination device according to the prior art.
5 is a cross-sectional perspective view of a lamination device according to an embodiment of the present invention
6 is a cross-sectional view for explaining the configuration of a lamination device according to an embodiment of the present invention
7A to 7C are a series of reference views for explaining the operation and action of the hydraulic pad in the lamination device according to the embodiment of the present invention.
8 is a cross-sectional view for explaining the configuration of a lamination device according to a modified embodiment of the present invention
9A to 9C are a series of reference views for explaining the operation and action of the modified hydraulic pad in the lamination device according to a modified embodiment of the present invention.
10 is a cross-sectional view for explaining the configuration of a lamination device according to another modified embodiment of the present invention
11 to 14 are reference views for explaining manufacturing methods for manufacturing a hydraulic pad for a lamination device according to an embodiment of the present invention

A lamination apparatus according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the present invention can be modified in various ways and has various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements. In the accompanying drawings, dimensions of structures are shown to be enlarged than actual for clarity of the present invention, or reduced than actual to understand a schematic configuration.

In addition, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Meanwhile, unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

<Example>

5 is a cross-sectional perspective view of a lamination device according to an embodiment of the present invention, FIG. 6 is a cross-sectional view for explaining the configuration of a lamination device according to an embodiment of the present invention, and FIGS. 7A to 7C are It is a series of reference diagrams for explaining the operation and action of the hydraulic pad in the lamination device by.

As shown, the lamination apparatus according to the embodiment of the present invention includes a fluid chamber 110a into which a fluid is injected, and the window is moved toward the window cover A11 and the fluid injection amount of the fluid chamber 110a is adjusted. It is characterized in that it is provided with a new type of dynamic hydraulic pad 110 capable of adjusting the deviation and sequentially adjusting the pressing force of the mounting portion with respect to the cover (A11) for each part.

In this way, the lamination device according to the embodiment of the present invention having a dynamic hydraulic pad 110 capable of controlling the pressing force of the mounting surface includes a window cover A11 having a bent portion whose end is sharply bent at a right angle of 90 degrees or more. Also, it is configured so that the flexible display panel can be laminated smoothly without the occurrence of bubbles or friction.

Hereinafter, a lamination apparatus according to an embodiment of the present invention will be described in more detail with a focus on the dynamic hydraulic pad 110 capable of controlling the pressing force of the mounting surface.

The hydraulic pad 110 is a new type of pad that is completely different from the pad used in the lamination apparatus so far, and can be said to be the most technically important part in the lamination apparatus according to the embodiment of the present invention.

The hydraulic pad 110 has a wide fluid chamber 110a into which fluid is injected, and the lower surface has an opening 110b communicating with the fluid injection hole 120a of the pad support 120 for fluid injection. Is formed. In the case of the fluid injection hole 120a of the pad support 120, it is connected to the fluid storage tank through a transfer hose, and the fluid is supplied by pumping the fluid pump. In this way, by adjusting the fluid injection amount to the fluid chamber 110a by the configuration in which the fluid chamber 110a is provided in the hydraulic pad 110, the pressing force of the mounting portion of the hydraulic pad 110 with respect to the window cover A11 during the lamination process is finely performed. It becomes possible to adjust it.

In this embodiment, a fluid injection hole 120a is formed in the pad support 120 and an opening 110b is formed on the lower surface of the hydraulic pad 110 so that communication is provided. It is possible to transform the pad 110 so as to be made through other portions of the pad 110 as needed.

The upper surface of the hydraulic pad 110 is formed in a rounded curved surface gradually lowering from the center to the circumference, and the corner where the upper surface and the side surface of the hydraulic pad 110 meet is formed at an acute angle of less than 90 degrees and protrudes most outward. do.

In addition, the upper surface central region, the upper surface central region and the corner region, the corner region, and the side region of the hydraulic pad 110 sequentially contact the window cover A11 by a flexible display panel with respect to the window cover A11. A first pressing part 111a, a second pressing part 111b, a third pressing part 111c, and a fourth pressing part 111d are formed. As shown in FIG. 6, the wall thickness gradually decreases as it goes from the first pressurization unit 111a to the third pressurization unit 111c, so that the third pressurization unit 111c has the thinnest thickness. The wall thickness gradually increases from the part 111c to the elastic support part 112 located below the fourth pressing part 11d, passing through the fourth pressing part 111d, so that the supporting force is increased.

The elastic support part 112 has a protruding part 112a protruding outwardly formed along the circumference thereof. When such a protrusion 112a is formed, the pad holder 130 is fastened to the pad support 120 by a fastening bolt 131 which is a fastening member with the protrusion 112a interposed therebetween, so that the hydraulic pad 110 is stably fixed. You can do it.

Here, it can be noted that the third pressing portion 111c formed in the corner region of the hydraulic pad 110 has a sharp acute angle outward and has a shape protruding outward and is formed to be the thinnest. As a result, it expands by fluid injection into the fluid chamber 110a and induces the greatest force to act on the inside of the bent edge of the window cover A11, and from this, the window cover (A11), which is the weakest area with the highest bubble generation frequency. ), it is possible to smoothly perform lamination on the edge of the bent part.

In addition to the third pressing portion 111c, another portion that may be notable is the elastic support portion 112. The elastic support part 112 is a part formed at the lower end of the wall surrounding the fluid chamber 110a, and is formed to have a sufficient thickness to support other parts located on the upper side while already passing through the fourth pressing part 111d. Even though it is not completely rigid, it plays an important role in allowing the fourth pressing part 111d to be elastically supported and open to the outside when fluid is injected.

In order to help understand the process of performing lamination using the hydraulic pad 110 having such a unique configuration, it will be described with reference to FIGS. 7A to 7C.

7A corresponds to a first step in which the hydraulic pad 110 starts to contact the rear of the window cover A11 while the unillustrated display panel A12 is pressed against the mounting surface extending from the top to the side. In the first step, as the window cover A11 moves downward by the upper jig holding the window cover A11, the first pressurization part 111a formed in the upper central region of the hydraulic pad 110 becomes the display panel A12. It is in a state of contact with between. At this time, the fluid chamber 110a is filled with oil, which is a pressurizing fluid, in advance.

Thereafter, as shown in FIG. 7B, when the window cover A11 is further moved downward by the upper jig to further apply pressure, the third pressing unit 111c from the second pressing unit 111b of the hydraulic pad 110 Until, the second step of sequentially contacting the rear surface of the window cover A11 with the display panel A12 interposed therebetween is performed. However, since the second step alone does not reach a sufficient level of the pressing force of the third pressing unit 111c against the inner edge of the bent portion of the window cover A11, the risk of bubble generation is high and the bent portion of the window cover A11 It can be noted that there is no perfect lamination to the end.

Thereafter, as shown in FIG. 7C, a third step of completely contacting the rear surface of the window cover A11 up to the fourth pressing unit 111d proceeds. In the third step, oil, which is a pressurizing fluid, is further injected into the fluid chamber 110a. Then, starting from the third pressing unit 111c having the thinnest wall thickness, the third pressing unit 111c gradually expands to the fourth pressing unit 111d located around it, and the third pressing unit 111c with respect to the bent corner of the window cover A11. The pressing force acts more strongly, and perfect lamination is achieved by contacting the window cover A11 with the display panel A12 interposed therebetween up to the fourth pressing portion 111d. Accordingly, even in the case of the window cover A11 having a bent portion at a right angle of 90 degrees or more sharply bent at an end thereof, high-quality lamination can be performed on the flexible display panel A12 without the need for an additional process without generating bubbles.

In the embodiment of the present invention, the life of the hydraulic pad 110 depends on how well the degree of expansion that appears differentially according to the difference in the time of injecting the fluid, the magnitude of the pressing force according to the injection amount, and the thickness of the wall of the hydraulic pad 110 is controlled. It can be said that it depends, and if there is the above-described hydraulic pad 110, it is possible to proceed with a high-level lamination process through appropriate control thereof.

On the other hand, in order to operate the lamination device provided with such a hydraulic pad 110, a fluid pump and a fluid pump supplying fluid to the hydraulic pad 110 are controlled to control the amount of fluid injected into the fluid chamber 110a, thereby controlling the window cover. A lamination system including a controller that can adjust the pressing force of the mounting surface of the hydraulic pad for and a fluid storage tank that stores fluid must be implemented.

Subsequently, FIG. 8 is a cross-sectional view for explaining a configuration of a lamination device according to a modified embodiment of the present invention.

As shown, the modified embodiment of the present invention is characterized in that the wall thickness of the hydraulic pad 110 is formed differently than before the modification. In the case of the modified hydraulic pad 110, the wall thickness of the first pressing unit 111a is the thickest, and the wall thickness of the first pressing unit 111a is not gradually decreased as it goes to the third pressing unit 111c. The thickness is the thinnest and the wall thickness becomes thicker as it goes to the third pressing part 111c. In addition, the wall thickness gradually increases from the third pressing portion 111c to the fourth pressing portion 111d to the elastic support portion 112 at the lower side thereof. In the case of the elastic support part 112, the elastic support part 112 is formed to have a sufficient thickness to support other parts located on the upper side as before the deformation, but is not completely rigid, but when fluid is injected, the fourth pressurizing part 111d is elastically supported and opened to the outside. They play an important role in allowing them to lose.

In the case of the hydraulic pad 110 modified in the lamination apparatus according to the modified embodiment as described above, there is a difference in some of the processes for performing lamination compared to before the modification. This will be described with reference to FIGS. 9A to 9C.

9A illustrates a first step in which the hydraulic pad 110 starts to contact the rear of the window cover A11 while the display panel A12 is pressed against the mounting surface extending from the top to the side. In the first step, as the window cover A11 moves downward by the upper jig holding the window cover A11, the first pressing portion 111a formed with the thinnest thickness in the upper central region of the hydraulic pad 110 is the most. Contact first. At this time, the fluid chamber 110a is filled with oil, which is a pressurizing fluid, in advance.

Thereafter, the window cover A11 may be further moved downward by the upper jig to induce sequential contact and pressurization of other parts, but unlike the previous embodiment, oil, which is a pressurizing fluid, is used as shown in eh 9c. By further injecting into the fluid chamber (110a), an additional pressing force is applied by starting from the first pressing unit (111a) with the thinnest wall thickness and expanding through the second pressing unit (111b) to the third pressing unit (111c). Do it. In the second step, since the pressing force of the fourth pressing unit 111d has not reached a sufficient level, lamination is not completely performed to the end of the bent portion of the window cover A11.

Thereafter, as shown in FIG. 9C, a third step of completely contacting the rear surface of the window cover A11 up to the fourth pressing unit 111d proceeds. In the third step, oil, which is a pressurizing fluid, is further injected into the fluid chamber 110a. Then, as the amount of fluid injected into the fluid chamber 110a increases, lamination is performed with sufficient pressing force by the fourth pressing portion 111d to the end of the window cover A11. In this way, the flexible display panel (A12) for the window cover (A11) having a sharply bent portion such that the end is at a right angle of 90 degrees or more, can proceed with high-quality lamination very smoothly without any additional processes. will be.

10 is a cross-sectional view for explaining the configuration of a lamination device according to another modified embodiment of the present invention.

As shown, even in the case of another modified embodiment of the present invention, the wall thickness of the hydraulic pad 110 is formed differently compared to before the modification. In the case of the modified hydraulic pad 110, the wall thickness does not change gradually from the first pressurization unit 111a to the third pressurization unit 111c, but is formed identically, and is then bent from the third pressurization unit 111c. As a result, the wall thickness gradually increases until it passes through the fourth pressing part 111d and reaches the elastic support part 112 on the lower side thereof. It should be noted here that the outer surface from the third pressing unit 111c to the lower side of the fourth pressing unit 111d is formed in a vertical or almost vertical surface, and the wall thickness is formed thicker toward the lower side by adjusting the inclination of the inner surface. Is that it did. It can be seen that the configuration of the hydraulic pad 110 according to this another modified embodiment is a very simplified form compared to the previous embodiment by minimizing the change in the thickness of the wall and the curvature of the outer surface. This facilitates the manufacture of the hydraulic pad 110, reduces mold irritation, helps to block the problem of poor quality of the hydraulic pad 110, and is expected to help reduce the loss of the lamination process. do. Even in the case of the simplified hydraulic pad 110 as described above, the lamination process of good products can be performed through the processes of FIGS. 7A to 7C and 9A to 9C.

11 to 14 are reference views for explaining manufacturing methods for manufacturing a hydraulic pad for a lamination device according to an embodiment of the present invention.

As shown, since the hydraulic pad 110 for a lamination device according to an embodiment of the present invention has a unique shape in which the fluid chamber 110a is formed, it can be manufactured according to a different manufacturing method.

In the case of FIG. 11, in order to manufacture the hydraulic pad 110 of the form shown in FIG. 6, a pair of semi-body parts 100-1 and 100-2 are respectively injection-molded in a mold, and then an injection-molded pair. It is characterized in that the half body (100-1, 100-2) of the bonded using an adhesive (B01). Accordingly, even if the fluid chamber 110a is formed in the hydraulic pad 110, it is possible to simply mold it. To this end, a hydraulic pad manufacturing apparatus including two types of molds for molding a pair of half bodies 100-1 and 100-2, respectively, is used.

In the case of FIG. 12, it is characterized in that it is manufactured by injection molding using the hydraulic pad 110 of the shape shown in FIG. 6 as one body. For this purpose, a split-type external mold (M1, M2) and the split-type external mold (M1, M2) formed by molding the outer shape of the hydraulic pad 110 and allowing the molded hydraulic pad 110 to be taken out, and the split-type external mold (M1, M2) An inner mold (M3) installed inside of the hydraulic pad (110) to form the fluid chamber (110a) of the hydraulic pad (110) must be provided in advance. Here, in the case of the inner mold M3, it is preferable to provide a divided body that can be divided into smaller pieces in order to easily take it out from the fluid chamber 110a after the hydraulic pad 110 is molded.

In this way, while the hydraulic pad manufacturing device including the external mold (M1, M2) and the internal mold (M3) is provided, the internal mold (M3) is mounted inside the external mold (M1, M2), and then the hydraulic pad (110) is formed. do. After that, the outer molds M1 and M2 are first divided and peeled off from the molded hydraulic pad 110, and the inner mold M3 is taken out from the fluid chamber 110a of the molded hydraulic pad 110, and the hydraulic pad 110 Can be obtained.

In the case of FIG. 13, in order to manufacture the hydraulic pad 110 of the shape shown in FIG. 8, a pair of semi-mains 100-1 and 100-2 divided similarly to the contents described above with reference to FIG. After each injection-molding, a pair of injection-molded semi-body 100-1 and 100-2 may be joined using an adhesive B01.

In the case of FIG. 14, it is characterized in that it is manufactured by injection molding using the hydraulic pad 110 of the shape shown in FIG. 8 as one body. To this end, similarly to the contents described above with reference to FIG. 12, the divided external molds M1 and M2 and the inner mold M3 are provided in advance, and the hydraulic pad 110 can be manufactured in the same manner using these. .

Although the preferred embodiment of the present invention has been described above, the present invention can use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the present invention determined by the limits of the following claims.

110: hydraulic pad 110a: fluid chamber
110b: opening 111a: first pressing part
111b: second pressing unit 111c: third pressing unit
111d: fourth pressing portion 112: elastic support portion
120: pad support 130: pad holder

Claims (18)

As a hydraulic pad for a lamination device for laminating the window cover and the flexible display panel by pressing the flexible display panel against the window cover,
A fluid chamber into which a fluid is injected is provided so that the degree of expansion is varied according to the injection amount of the fluid injected into the fluid chamber, and the pressing force on the display panel can be adjusted,
The thickness of the fluid chamber wall is differentially formed according to the part, so that even if the injection amount of the fluid injected into the fluid chamber is the same, the degree of expansion and the pressing force on the display panel can be differentially formed for each part,
The first pressurization unit, the second pressurization unit, and the third pressurization unit sequentially press the flexible display panel against the window cover in the central area of the upper surface, the area between the upper surface center and the corner, the corner area, and the side area of the hydraulic pad. , The upper surface of the hydraulic pad is formed as a fourth pressing unit, and the upper surface of the hydraulic pad is formed in a rounded curved surface gradually lowering from the center to the corner, and the wall thickness gradually decreases from the first pressing unit to the third pressing unit. A hydraulic pad for a lamination device, characterized in that the wall thickness gradually increases toward a lower side of the fourth pressurization unit while being bent at a starting point of the third pressurization unit. The method of claim 1,
A hydraulic pad for a lamination device, characterized in that an opening for fluid injection is formed on a lower surface of the hydraulic pad. delete delete delete The method of claim 1,
The hydraulic pad for a lamination device, characterized in that the third pressing portion protrudes most outward from the side and is formed to be inclined in a shape that is gathered inward toward a lower side of the fourth pressing portion. delete delete delete delete As a lamination device for laminating a window cover and a flexible display panel by pressing a flexible display panel against a window cover,
A lamination device comprising the hydraulic pad of any one of claims 1, 2 and 6. The method of claim 11,
And a pad support joined to a lower end of the hydraulic pad to support the hydraulic pad, and having a fluid injection hole for injecting and recovering fluid into the fluid chamber of the hydraulic pad. The method of claim 12,
A protrusion protruding along the outer circumference is formed at the lower end of the hydraulic pad,
The lamination apparatus further comprising a pad holder fixed to the hydraulic pad by being fastened to the pad support by a fastening member on the upper surface of the protruding part of the hydraulic pad with the protruding part of the hydraulic pad interposed therebetween. The lamination device of claim 12;
A fluid pump supplying fluid to the hydraulic pad through the fluid injection hole of the lamination device; And
And a controller for controlling the fluid pump to control the amount of fluid injected into the fluid chamber. delete delete delete delete

Images